CN108173557A - A kind of active matching network equipment - Google Patents
A kind of active matching network equipment Download PDFInfo
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- CN108173557A CN108173557A CN201810170145.4A CN201810170145A CN108173557A CN 108173557 A CN108173557 A CN 108173557A CN 201810170145 A CN201810170145 A CN 201810170145A CN 108173557 A CN108173557 A CN 108173557A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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Abstract
The invention discloses a kind of active matching network equipment, including active matching network and power module；Active matching network includes the first impedance converter unit, power amplification unit and the second impedance converter unit, and the high impedance of active antenna is transformed to medium impedance by the first impedance converter unit to receive the radiofrequency signal of active antenna transmission；Power amplification unit carries out signal amplification to carry out the radiofrequency signal after impedance transformation to the first impedance converter unit；Power amplification unit is carried out the amplified radio signal transmission of signal to test receiver by the second impedance converter unit medium impedance is transformed to target impedance.The active matching network equipment of the present invention can be suitable for the intermediate-frequency band of electromagnetic compatibility vehicle radiation emission test, to the high resistant output impedance of active antenna in matching test, to be transferred in test receiver with ensuring the radiofrequency signal areflexia received, at the same can be ensured that test in will not introduce electromagnetic interference and influence test result.
Description
Technical field
The present invention relates to electromagnetic compatibility test field, more particularly to a kind of active matching network equipment.
Background technology
With the fast development of auto industry, demand increasingly diversification of the people for automobile function, various movements are mutual
The importing of unicom letter, dedicated short-range communication function, makes a large amount of electrical equipments be applied on automobile, has in these electrical equipments
Many conducting wires, coil and the electric appliance with contact have different capacitance and inductance, any one closing with capacitance and inductance
Oscillation circuit can all be formed by closing circuit, generated the higher-order of oscillation and be simultaneously emitted in the air with electromagnetic wave, be caused between vehicle system
Electromagnetic compatibility radiation raising external with vehicle.Vehicle electromagnetic compatibility test is the necessary examination for weighing vehicle-mounted Electromagnetic Compatibility performance
One of test.
Vehicle electromagnetic compatibility relies on active vehicle antenna in the test of intermediate-frequency band, and active vehicle reception antenna exports
Impedance is high resistant (resistance value of the high resistant be usually kilo-ohm rank), therefore in order to ensure that active vehicle reception antenna received penetrates
Frequency signal undamped can be transferred to test receiver, the high resistant output impedance of active antenna in matching test be needed, to ensure
The correctness of the test result of intermediate-frequency band.And active matching network of the prior art is there are many defects, such as：Test connection
Complexity, is readily incorporated the problem of electromagnetic interference at poor reliability.
Invention content
Part in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of active matching network equipment,
Suitable for the intermediate-frequency band of electromagnetic compatibility vehicle radiation emission test, resistance is exported to the high resistant of active antenna in matching test
It is anti-, to be transferred in test receiver with ensuring the radiofrequency signal areflexia received, while it can be ensured that and will not draw in test
Enter electromagnetic interference and influence test result.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of active matching network equipment is provided, is coupled between active antenna and test receiver, including active matching
Network and the power module that power supply is provided for the active matching network；
The active matching network includes：
First impedance converter unit, to receive the radiofrequency signal of active antenna transmission, and by the active antenna
High impedance be transformed to medium impedance；
Power amplification unit is coupled to the first impedance converter unit, to the first impedance converter unit into
Radiofrequency signal after row impedance transformation carries out signal amplification；
Second impedance converter unit, is coupled to the power amplification unit, the medium impedance is transformed to target
Impedance, and the power amplification unit is subjected to the amplified radio signal transmission of signal to the test receiver.
Further, the first impedance converter unit includes first resistor, second resistance, 3rd resistor and field-effect
Pipe；
The first resistor is coupled between the grid of the field-effect tube and the drain electrode of the field-effect tube, and described second
Resistance is coupled between the grid and earth point of the field-effect tube, and the 3rd resistor is coupled to the source electrode of the field-effect tube
Between the earth point, the grid of the field-effect tube is coupled to the active antenna, the drain electrode connection of the field-effect tube
To the power module；
Wherein, the field-effect tube is configured to work at cut-off region.
Further, the power amplification unit includes the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th
Resistance, the first capacitance and the first triode；
4th resistance is coupled between base stage and the power module of first triode, the 5th resistance
It is coupled between the collector of the power module and first triode, the 6th resistance is coupled to the one or three pole
Between the base stage of pipe and the earth point, the 7th resistance is coupled to the emitter of first triode and the earth point
Between, first capacitance and the 8th resistance are serially connected emitter and the ground connection in first triode
Between point；
Wherein, first triode is configured to work at amplification region.
Further, the 8th resistance is configured as resistance value adjustable resistance.
Further, the second impedance converter unit includes the 9th resistance, the tenth resistance, the second capacitance and second
Triode；
9th resistance is coupled between emitter and the earth point of second triode, the two or three pole
The base stage of pipe is coupled to the collector of first triode, and the collector of second triode is coupled to the power supply mould
Block, the tenth resistance and second capacitance are serially connected the rear emitter with second triode and connect；
Wherein, second triode is configured to work at cut-off region.
Further, the active matching network further includes the first band logical filter being connect with the first impedance converter unit
Wave unit, to carry out being filtered the radiofrequency signal before impedance transformation to the high impedance of the active antenna.
Further, the active matching network further includes the second bandpass filtering unit, the second bandpass filtering unit
It is connected between the first impedance converter unit and the power amplification unit, to be carried out to the first impedance converter unit
Radiofrequency signal after impedance transformation is filtered.
Further, electrostatic is also associated between the first band pass filtering unit and the first impedance converter unit to prevent
Protect unit.
Further, the active matching network equipment further includes a housing, and the active matching network settings are in described
Enclosure interior；
The power module is configured as the vehicle power supply outside the battery being contained in the housing or the housing.
Further, it is additionally provided with switching switch on the housing, the switching switch is operationally switching the electricity
Connection between pond and the vehicle power supply and the active matching network.
Further, voltmeter and ammeter, one end of the voltmeter and the power supply mould are additionally provided on the housing
Block is connected, and the other end of the voltmeter is connected with earth point, the ammeter be connected on the power module with it is described
Between active matching network.
A kind of active matching network equipment provided in an embodiment of the present invention, suitable for electromagnetic compatibility vehicle radiation emission test
Intermediate-frequency band, which is converted by the output high impedance that is transmitted to active antenna by impedance twice,
It carries out an impedance to the radiofrequency signal that active antenna transmits by the first impedance converter unit first to convert so that active antenna
The high impedance of kilo-ohm rank of output is transformed to the other medium impedance of hundred ohm levels, then by power conversion unit to active day
The radiofrequency signal of line carries out ensuring that medium impedance is transformed to target impedance by the second impedance converter unit while signal amplification, by
This realizes the impedance matching between active antenna and test receiver on medium-frequency band, it can be ensured that the radio frequency received
It is transferred in test receiver to signal areflexia, while can be ensured that and will not introduce electromagnetic interference in testing and influence to test
As a result.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of module frame chart of active matching network equipment provided in an embodiment of the present invention；
Fig. 2 is the physical circuit figure of active matching network provided in an embodiment of the present invention；
Fig. 3 is the internal structure chart of active matching network equipment provided in an embodiment of the present invention；
Fig. 4 is the appearance positive structure diagram of active matching network equipment provided in an embodiment of the present invention；
Fig. 5 is S11 test result schematic diagram of the active matching network equipment in intermediate-frequency band of the present invention；
Fig. 6 is Smith circle diagram of the active matching network equipment of the present invention on intermediate-frequency band；
Fig. 7 is S21 test result schematic diagram of the active matching network equipment of the present invention on intermediate-frequency band；
Fig. 8 a~Fig. 8 c are the active matching network equipment of the present invention respectively in low frequency, the vehicle radiation-emitting of intermediate-frequency band
Spectrum measurement result schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, is clearly and completely described the technical solution in the embodiment of the present invention, it is clear that described embodiment is only this
Invention part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
All other embodiments obtained under the premise of creative work are not made, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a kind of active matching network equipment, suitable for electromagnetic compatibility vehicle radiation emission test
Intermediate-frequency band, to the high resistant output impedance of active antenna in matching test, to ensure the radiofrequency signal areflexia received
Ground is transferred in test receiver, at the same can be ensured that test in will not introduce electromagnetic interference and influence test result.
With reference to shown in Fig. 1, Fig. 1 is a kind of module frame chart of active matching network equipment provided in an embodiment of the present invention, should
Active matching network equipment 10 is coupled between active antenna 20 and test receiver 30, wherein, active matching network equipment 10
Including active matching network 11 and power module 12, power module 12 provides working power for active matching network 11；Active
Distribution network 11 is used to carry out impedance matching to the radiofrequency signal that active antenna 20 transmits, so that radiofrequency signal is transmitted to without loss
Test receiver 30, while realize and the power of radiofrequency signal is amplified.In addition, the DC output voltage of power module 12
Voltage value is 12V.
Particularly, active matching network 11 includes the first impedance converter unit 111, power amplification unit 112 and second
Impedance converter unit 113；Wherein, the first impedance converter unit 111, the radio frequency to be transmitted by receiving active antenna 20 are believed
Number, and the high impedance of active antenna is transformed to medium impedance；Power amplification unit 112 is coupled to the first impedance converter unit
111, carry out signal amplification to carry out the radiofrequency signal after impedance transformation to the first impedance converter unit 111；Second impedance becomes
Unit 113 is changed, is coupled to power amplification unit 112, medium impedance is transformed to target impedance, and by power amplification unit
112 carry out the amplified radio signal transmission of signal to test receiver 30, wherein, target impedance is 50 ohm.
A kind of active matching network equipment provided in an embodiment of the present invention, suitable for electromagnetic compatibility vehicle radiation emission test
Intermediate-frequency band, which is converted by the output high impedance that is transmitted to active antenna by impedance twice,
It carries out an impedance to the radiofrequency signal that active antenna transmits by the first impedance converter unit first to convert so that active antenna
The high impedance of kilo-ohm rank of output is transformed to the other medium impedance of hundred ohm levels, then by power conversion unit to active day
The radiofrequency signal of line carries out ensuring that medium impedance is transformed to target impedance by the second impedance converter unit while signal amplification, by
This realizes the impedance matching between active antenna and test receiver on medium-frequency band, it can be ensured that the radio frequency received
It is transferred in test receiver to signal areflexia, while can be ensured that and will not introduce electromagnetic interference in testing and influence to test
As a result.
With reference to shown in Fig. 2, physical circuit figures of the Fig. 2 for active matching network provided in an embodiment of the present invention, the first impedance
Converter unit 111 includes first resistor R1, second resistance R2,3rd resistor R3 and field-effect tube T1；Wherein, first resistor R1 couplings
Be connected between the drain electrode of grid and field-effect tube T1 of field-effect tube T1, second resistance R2 be coupled to the grid of field-effect tube T1 with
Between earth point, 3rd resistor R3 is coupled between the source electrode and earth point of field-effect tube T1, and the grid of field-effect tube T1 passes through
The input terminal IN of active matching network is coupled to active antenna 20, and the drain electrode of field-effect tube T1 passes through the power supply of active matching network
End VCC is connected to power module 14, wherein, field-effect tube T1 is configured to work at cut-off region, in the embodiment of the present invention, field effect
Should pipe T1 N-type field-effect tube may be used.In practical applications, first resistor R1, second resistance R2 and can be appropriately arranged with
The resistance value of the three each resistance of resistance R3, such as the resistance value by first resistor R1, second resistance R2 and each resistance of 3rd resistor R3
Setting is 2.2 megohms, 470 kilohms, 2.7 kilohms corresponding respectively, is causing between the grid and source electrode of N-type field-effect tube
Voltage is higher than cut-in voltage (being usually 2-4V), it is ensured that N-type field-effect tube T1 is operated in cut-off region, and then export active antenna
The high impedance of kilo-ohm rank be transformed to the other medium impedance of hundred ohm levels, to ensure the stability of power amplification unit work.
With continued reference to shown in Fig. 2, power amplification unit 112 include the 4th resistance R4, the 5th resistance R5, the 6th resistance R6,
7th resistance R7, the 8th resistance R8, the first capacitance C3 and the first triode T2；4th resistance R4 is coupled to the first triode
Between the base stage of T2 and power module 14, the 5th resistance R5 be coupled to 14 and first triode T2 of power module collector it
Between, the 6th resistance R6 is coupled between base stage and the earth point of the first triode T2, and the 7th resistance R7 is coupled to the first triode
Between the emitter and earth point of T2, the first capacitance C3 and the 8th resistance R8 are serially connected the transmitting in the first triode T2
Between pole and earth point, wherein, the first triode T2 is configured to work at amplification region, in the embodiment of the present invention, the one or three pole
NPN type triode may be used in pipe T2.In addition, the 8th resistance R8 is configured as resistance value adjustable resistance, to adjust power amplification list
The signal amplification factor of member 122, illustratively, if the resistance value of the 8th resistance R8 is adjusted to 470 ohm, power amplification list at this time
Member 112 enables to the power of radiofrequency signal to be enlarged into 10db by 0db.Certainly, in order to adjust the signal of power amplification unit 112
Amplification factor, those skilled in the art can be achieved by adjusting the resistance value of the 8th resistance R8.In practical applications, may be used
To be appropriately arranged with the resistance value of the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th each resistance of resistance R7, such as by
Four resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th each resistance of resistance R7 resistance value to be correspondingly arranged respectively be 15 kilo-ohms
Nurse, 470 ohm, 6.8 kilohms and 330 ohm so that the first triode operation can steadily cause while amplification region
Medium impedance is transformed to target impedance by the second impedance converter unit, to realize the purpose of signal amplification and impedance matching simultaneously.
With continued reference to shown in Fig. 2, the second impedance converter unit 113 include the 9th resistance R9, the tenth resistance R10, second every
Straight capacitance C6 and the second triode T3；9th resistance R9 is coupled between the emitter and earth point of the second triode T3, and second
The base stage of triode T3 is coupled to the collector of the first triode T2, and the collector of the second triode T3 is coupled to power module
14, the tenth resistance R10 and the second capacitance C6 are serially connected in the emitter of the second triode T3 and active matching network
Between output terminal OUT, wherein, the second triode T3 is configured to work at cut-off region, in the embodiment of the present invention, the second triode
NPN type triode may be used in T3.In practical applications, the resistance value of the 9th resistance R9, the tenth resistance R10 can be appropriately arranged with,
For example the resistance value of the 9th resistance R9 of setting, the tenth resistance R10 correspond to 330 ohm, 47 ohm respectively, so that the second impedance converts
Medium impedance is transformed to target impedance by unit, and then with ensuring the radiofrequency signal areflexia that active matching network equipment receives
It is transferred in test receiver.
In above-described embodiment, with reference to shown in Fig. 1, active matching network 11 is further included to be connected with the first impedance converter unit 111
The first band pass filtering unit 114 connect, to carry out filtering radiofrequency signal before impedance transformation to the high impedance of active antenna
Wave.With reference to shown in Fig. 2, first band pass filtering unit 114 can include the filtering of the first filter capacitor C1 being serially connected and first
Inductance L1, the first filter capacitor C1 are connected to the grid of field-effect tube T1, and the first filter inductance L1 is connected on active matching network
Input terminal IN and the first filter capacitor C1 between, in practical applications, the capacitance of filter capacitor C1 can be 22nF, filtered electrical
The inductance value for feeling L1 can be 2.7mH.Bandpass filter, the center of the bandpass filter are formed by filter capacitor and filter inductance
Frequency point is 600kHz, pass band 100KHz-2MHz, can be on intermediate-frequency band from there through first band pass filtering unit
Realize that the radiofrequency signal transmitted to active antenna is filtered.
In above-described embodiment, with reference to shown in Fig. 1, active matching network 11 further includes the second bandpass filtering unit 115, and second
Bandpass filtering unit 115 is connected between the first impedance converter unit 111 and power amplification unit 112, to become to the first impedance
The radiofrequency signal that unit 111 is carried out after impedance transformation is changed to be filtered.With reference to shown in Fig. 2, the second bandpass filtering unit 115 can be with
The first triode T2 is connected to comprising the second filter capacitor C2 being serially connected and the second filter inductance L2, the second filter capacitor C2
Source electrode, the second filter inductance L2 is connected between the base stage of the second filter capacitor C2 and the second triode T3.From there through
Two bandpass filtering units can further realize that the radiofrequency signal transmitted to active antenna is filtered on intermediate-frequency band.
In practical applications, the first filter capacitor C1 can be set, the capacitance of the second filter capacitor C2 is 22nF, first
Filter inductance L1, the second filter inductance L2 inductance value be 2.7mH.The embodiment of the present invention is to specific filter inductance and filtered electrical
Appearance is not limited.
In above-described embodiment, with reference to shown in Fig. 1, between 114 and first impedance converter unit 111 of first band pass filtering unit
It is also associated with static protective unit 116.With reference to shown in Fig. 2, static protective unit 116 can include being serially connected in power module
Two diodes between 12 and earth point, for ease of description, two diodes are denoted as D1 and D2, diode D1 and two respectively
Tie point between pole pipe D2 is connected with the grid of field-effect tube T1.It, can be to active by setting static protective unit
Distribution network device carries out electrostatic protection, to ensure that the electronic component inside active matching network equipment is not damaged by ESD.
In above-described embodiment, filter unit (not shown) is also associated between power module 12 and active matching network 11,
With reference to shown in Fig. 2, which includes two filter capacitors, and two filter capacitors are denoted as C4 and C5 respectively, from there through filter
Noise signal in the d. c. voltage signal that wave unit exports power module, it is ensured that active matching network being capable of steadily work
Make.
In above-described embodiment, with reference to shown in Fig. 3 and Fig. 4, Fig. 3 is active matching network equipment provided in an embodiment of the present invention
Internal structure chart, Fig. 4 be active matching network equipment provided in an embodiment of the present invention appearance positive structure diagram, it is active
Matching network device 10 further includes a housing 13, and housing 13 includes coordinating the upper cover (unmarked in figure) of assembling and back box (in figure
It is unmarked), the surface of housing 13 is equipped with anti-oxidation coating, to prevent surface of shell from aoxidizing.Active matching network 11 passes through one
Frame (unmarked in figure) is set to inside housing 13, and housing 13 is equipped with signal input part 14 and signal output end 15, to even
Source antenna 20 is connected to, signal input part 14 to connect active antenna 20 and active matching network 11, use by signal output end 15
To connect active matching network 11 and test receiver 30, wherein, signal input part 14, signal output end 15 are both configured to
SMA turns N Connector；Power module 12 is configured as the battery being contained in housing 13.Wherein, when power module 12 is configured
For be contained in housing 13 battery when, be further opened with the charging hole 16 that power module 12 charges on housing 13.Except this
Except, the vehicle power supply that power module 12 can also be configured to outside housing 13, and pass through power connection and be connected to vehicle power supply
Mode to active matching network 11 provide DC input voitage.It is carried from there through battery or vehicle power supply to active matching network
It for DC input voitage, can ensure the stability of DC input voitage, and then can ensure active matching network in again and again
Take the stability of the impedance matching between active antenna and test receiver.
In above-described embodiment, with reference to shown in Fig. 3, Fig. 4, being additionally provided with switching switch 17 on housing 13, switching switch 17 to
Operationally switch the connection between 11 network of battery and vehicle power supply and active matching.Preferably, switching switch 17 can be set
It is set to toggle switch or button switch.From there through operation switching switch, switching selection battery and vehicle power supply in one with
Connection between active matching network, so as to fulfill flexibly and steadily to the mesh of active matching network offer DC input voitage
's.
In above-described embodiment, with reference to shown in Fig. 3 and Fig. 4, voltmeter 18 and ammeter 19, voltmeter are additionally provided on housing 15
18 one end is connected with power module 12, and the other end of voltmeter 18 is connected with earth point, and ammeter 19 is connected on power supply
Between module 12 and active matching network 11, wherein, voltmeter 18 is the mechanical voltmeter head of pointer-type, and ammeter 19 is pointer-type
Mechanical ammeter head so, it is possible while avoiding introducing signal interference, to realize the work to being supplied to active matching network
Voltage and operating current are monitored.
It should be noted that the active matching network equipment due to the embodiment of the present invention believes the radio frequency that active antenna transmits
Number power amplification is carried out, the power of radiofrequency signal is such as enlarged into 10db, therefore in electromagnetic compatibility vehicle radiation-emitting by 0db
In test, to ensure that experimental data is true and reliable, this can be modified in test software, further, it is also possible to by
Corresponding attenuator is set in electromagnetic compatibility vehicle radiation emission test system, which is connected to active matching network equipment
Between test receiver, to ensure that experimental data is true and reliable.
With reference to test result signal to the active matching network equipment of the present invention in electromagnetic compatibility vehicle radiation-emitting
Application effect in test system is explained.
The power supply adaptor of the present invention can be equivalent into a two-port network, and one terminates input signal, and another termination is defeated
Go out signal, using Port 1 as the input port of signal, output ports of the Port 2 as signal, S11 represents return loss,
It is exactly that how many energy is reflected back toward source (Port1), this value is the smaller the better, general recommendations S11<0.1, i.e. -20dB,
Return loss S11 tests, return loss test knot are carried out in the range of intermediate-frequency band to the active matching network equipment of the present invention
Fruit from Fig. 5 as shown in figure 5, can intuitively find out, active matching network equipment of the invention is in intermediate frequency (520KHz-
S11 test fruit schematic diagrames 1.73MHz) are integrally below -20dB.
Fig. 6 is Smith circle diagram of the active matching network equipment of the present invention on intermediate-frequency band, from fig. 6, it can be seen that this
The active matching network equipment of invention can realize 50 ohm of impedance well on multiple frequency points of intermediate-frequency band
Match, therefore the intermediate-frequency band of electromagnetic compatibility vehicle radiation emission test can be suitable for, to active antenna in matching test
High resistant output impedance, to be transferred in test receiver with ensuring the radiofrequency signal areflexia received.
S21 represents that insertion loss, that is, how many energy have been transferred to destination (Port 2), this value it is more big more
Good, ideal value is 1, that is, 0dB, and insertion loss S21 is carried out to the active matching network equipment of the present invention on intermediate-frequency band
Test, insertion loss test result from Fig. 7 as shown in fig. 7, can intuitively find out, active matching network equipment of the invention
It is whole close to 10dB in the S21 test fruit schematic diagrames of intermediate frequency (520KHz-1.73MHz), and the active matching network of the present invention
Device can be amplified to 10db to the power of radiofrequency signal by 0db, and the active matching network equipment for thus characterizing the present invention reaches
Good design effect is arrived.
The power supply adaptor of the present invention is accessed into vehicle electromagnetic compatibility radiation emission test system, and in electromagnetic compatibility vehicle
Corresponding attenuator (10db attenuation) is set in radiation emission test system, the attenuator be connected to active matching network equipment with
Between test receiver, respectively into line frequency in low frequency (100Khz-150Khz), intermediate frequency (520KHz-1.73MHz) band limits
Spectrum test, test result are that the active matching network equipment of the present invention is applied to low frequency, intermediate frequency respectively as shown in Fig. 8 a~Fig. 8 c
The vehicle radiation-emitting spectrum measurement result schematic diagram of wave band, measured background noise are below limit value 6dB, and there are enough
Allowance is tested, and is not introduced into broadband and narrowband interference, the active matching network equipment for being indicated above the present invention not only can be good
The intermediate-frequency band applied to vehicle radiation emission test, but also the low of vehicle radiation emission test can be advantageously applied to
Frequent section.
To sum up test result shows that the active matching network equipment of the embodiment of the present invention can be suitable for electromagnetic compatibility vehicle
The intermediate-frequency band of radiation emission test to the high resistant output impedance of active antenna in matching test, is penetrated with ensure to receive
Be transferred in test receiver to frequency signal areflexia, at the same can be ensured that test in will not introduce electromagnetic interference and influence to test
As a result.
The alternative embodiment that any combination forms the present invention may be used, herein no longer in above-mentioned all optional technical solutions
It repeats one by one.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of active matching network equipment, is coupled between active antenna and test receiver, which is characterized in that including active
Matching network and the power module that power supply is provided for the active matching network；
The active matching network includes：
First impedance converter unit, to receive the radiofrequency signal of active antenna transmission, and by the height of the active antenna
Impedance is transformed to medium impedance；
Power amplification unit is coupled to the first impedance converter unit, to hinder the first impedance converter unit
Radiofrequency signal after resistance changes carries out signal amplification；
Second impedance converter unit, is coupled to the power amplification unit, the medium impedance is transformed to target impedance,
And the power amplification unit is subjected to the amplified radio signal transmission of signal to the test receiver.
2. active matching network equipment according to claim 1, which is characterized in that the first impedance converter unit includes
First resistor, second resistance, 3rd resistor and field-effect tube；
The first resistor is coupled between the grid of the field-effect tube and the drain electrode of the field-effect tube, the second resistance
It is coupled between the grid and earth point of the field-effect tube, the 3rd resistor is coupled to source electrode and the institute of the field-effect tube
Between stating earth point, the grid of the field-effect tube is coupled to the active antenna, and the drain electrode of the field-effect tube is connected to institute
State power module；
Wherein, the field-effect tube is configured to work at cut-off region.
3. active matching network equipment according to claim 2, which is characterized in that the power amplification unit includes the 4th
Resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the first capacitance and the first triode；
4th resistance is coupled between base stage and the power module of first triode, the 5th resistance coupling
Between the collector of the power module and first triode, the 6th resistance is coupled to first triode
Between base stage and the earth point, the 7th resistance be coupled to the emitter of first triode and the earth point it
Between, first capacitance and the 8th resistance are serially connected emitter and the earth point in first triode
Between；
Wherein, first triode is configured to work at amplification region.
4. active matching network equipment according to claim 3, which is characterized in that the 8th resistance is configured as resistance value
Adjustable resistance.
5. active matching network equipment according to claim 3 or 4, which is characterized in that the second impedance converter unit
Including the 9th resistance, the tenth resistance, the second capacitance and the second triode；
9th resistance is coupled between emitter and the earth point of second triode, second triode
Base stage is coupled to the collector of first triode, and the collector of second triode is coupled to the power module, institute
It states the tenth resistance and second capacitance is serially connected the rear emitter with second triode and connect；
Wherein, second triode is configured to work at cut-off region.
6. active matching network equipment according to claim 1, which is characterized in that the active matching network further include with
The first band pass filtering unit of the first impedance converter unit connection, to carry out impedance change to the high impedance of the active antenna
It is alternatively preceding that the radiofrequency signal is filtered.
7. the active matching network equipment according to claim 1 or 6, which is characterized in that the active matching network also wraps
The second bandpass filtering unit is included, the second bandpass filtering unit is connected to the first impedance converter unit and is put with the power
Between big unit, it is filtered with carrying out the radiofrequency signal after impedance transformation to the first impedance converter unit.
8. the active matching network equipment according to claim 1 or 6, which is characterized in that the first band pass filtering unit
Static protective unit is also associated between the first impedance converter unit.
9. active matching network equipment according to claim 1, which is characterized in that the active matching network equipment also wraps
A housing is included, the active matching network settings are in the enclosure interior；
The power module is configured as the vehicle power supply outside the battery being contained in the housing or the housing.
10. active matching network equipment according to claim 9, which is characterized in that be additionally provided with switching on the housing and open
It closes, the switching switch is operationally switching between the battery and the vehicle power supply and the active matching network
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470922A (en) * | 2018-11-09 | 2019-03-15 | 西安科技大学 | A kind of high impedance radio frequency measuring device and method |
| CN112686357A (en) * | 2019-10-17 | 2021-04-20 | 莫冰 | Ultrahigh frequency RFID (radio frequency identification) tag and anti-electromagnetic interference module thereof |
| CN113514702A (en) * | 2021-03-24 | 2021-10-19 | 上海克开电器有限公司 | Test box for insertion loss test |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201479080U (en) * | 2009-08-19 | 2010-05-19 | 成都川美新技术开发有限公司 | Impedance conversion amplifier |
| US20110273355A1 (en) * | 2010-05-04 | 2011-11-10 | Samsung Electro-Mechanics Company | Systems and methods for complementary metal-oxide-semiconductor (cmos) differential antenna switches using multi-section impedance transformations |
| US8606198B1 (en) * | 2012-07-20 | 2013-12-10 | Triquint Semiconductor, Inc. | Directional coupler architecture for radio frequency power amplifier with complex load |
| CN104202007A (en) * | 2014-08-19 | 2014-12-10 | 西安电子科技大学 | Active broadband matching method of short-wave frequency-band electrically small antenna and matching circuit thereof |
| CN105024651A (en) * | 2014-04-29 | 2015-11-04 | 瑞昱半导体股份有限公司 | Radio frequency power amplifier and method for improving power added efficiency and linearity |
| CN107332528A (en) * | 2017-08-11 | 2017-11-07 | 华中科技大学 | A kind of tunable multiple frequency section power amplifier |
-
2018
- 2018-03-01 CN CN201810170145.4A patent/CN108173557B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201479080U (en) * | 2009-08-19 | 2010-05-19 | 成都川美新技术开发有限公司 | Impedance conversion amplifier |
| US20110273355A1 (en) * | 2010-05-04 | 2011-11-10 | Samsung Electro-Mechanics Company | Systems and methods for complementary metal-oxide-semiconductor (cmos) differential antenna switches using multi-section impedance transformations |
| US8606198B1 (en) * | 2012-07-20 | 2013-12-10 | Triquint Semiconductor, Inc. | Directional coupler architecture for radio frequency power amplifier with complex load |
| CN105024651A (en) * | 2014-04-29 | 2015-11-04 | 瑞昱半导体股份有限公司 | Radio frequency power amplifier and method for improving power added efficiency and linearity |
| CN104202007A (en) * | 2014-08-19 | 2014-12-10 | 西安电子科技大学 | Active broadband matching method of short-wave frequency-band electrically small antenna and matching circuit thereof |
| CN107332528A (en) * | 2017-08-11 | 2017-11-07 | 华中科技大学 | A kind of tunable multiple frequency section power amplifier |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470922A (en) * | 2018-11-09 | 2019-03-15 | 西安科技大学 | A kind of high impedance radio frequency measuring device and method |
| CN112686357A (en) * | 2019-10-17 | 2021-04-20 | 莫冰 | Ultrahigh frequency RFID (radio frequency identification) tag and anti-electromagnetic interference module thereof |
| CN113514702A (en) * | 2021-03-24 | 2021-10-19 | 上海克开电器有限公司 | Test box for insertion loss test |
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| CN108173557B (en) | 2023-09-26 |
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