CN116070570A - Design method of 0.7-2 GHz linkage control two-way output switch filter assembly - Google Patents
Design method of 0.7-2 GHz linkage control two-way output switch filter assembly Download PDFInfo
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- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/373—Design optimisation
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- H03H11/04—Frequency selective two-port networks
- H03H11/06—Frequency selective two-port networks comprising means for compensation of loss
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- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
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Abstract
The invention discloses a design method of a 0.7-2 GHz linkage control double-way output switch filter assembly, which has the difficulty that on the basis of schematic diagram circuit simulation, three-dimensional electromagnetic field simulation modeling is carried out on a box body, a barrier bar and a PCB (printed circuit board) of the switch filter assembly to obtain more accurate simulation results of electric field energy, magnetic field energy and S parameters, system-level modeling simulation requirements are related to radio frequency circuit active devices, passive devices and PCB S parameters, and simulation difficulty is high.
Description
Technical Field
The invention belongs to the field of integrated circuits of radar receivers, and particularly relates to a design method of a 0.7-2 GHz linkage control two-way output switch filter assembly.
Background
The switch filter component can amplify, power-divide, attenuate, switch select and filter the 0.7-2 GHz weak radar signal received from the antenna, and output the radio frequency signal meeting the requirements, and is widely applied to satellite communication and radar.
The traditional design method of the switch filter component is to design and process a real object by virtue of experience design and simply calculating a gain index, and has the advantages of single-path output, single control and function and component thickness of 12mm or even thicker.
Along with the development of a radar receiver, a plurality of antennae receive radar signals, each path of radar signals has different working frequency bands and high integration level, and the design volume requirement of a 0.7-2 GHz linkage control two-way output switch filter assembly in the radar system is as small as possible, so that the signal crosstalk and signal line cross electromagnetic compatibility problem is more outstanding.
The original design method only depends on engineering experience to design, then processes a real object, if the real object test result does not meet the requirement, then repairs the equipment, wastes manpower, time and component cost, has lower working efficiency for a designer, adds a shift point because the designer only simulates a schematic diagram when designing a component, does not simulate a three-dimensional electromagnetic field for a PCB and a structure of a switch filter component, and does not simulate system-level modeling for S parameters of an active device, a passive device and a PCB in a radio frequency circuit.
Disclosure of Invention
The invention provides a design method of a 0.7-2 GHz linkage control double-way output switch filter assembly, which solves the requirements of a P/L wave band frequency conversion channel on the aspects of high reliability, linkage control, high integration level and strong universality of the 0.7-2 GHz linkage control double-way output switch filter assembly.
The technical scheme for realizing the invention is as follows: a design method of a 0.7-2 GHz linkage control two-way output switch filter assembly is characterized by comprising the following steps:
s1: and (2) making a scheme for the 0.7-2 GHz linkage control two-way output switch filter assembly according to the technical index requirement of the 0.7-2 GHz linkage control two-way output switch filter assembly in the radar receiver, and switching to S2.
S2: and (3) according to the establishment scheme and combining the schematic diagram, obtaining a schematic diagram simulation model, and turning to S3.
S3: and (4) carrying out PCB design and structural design on the component according to the result of a schematic diagram simulation model of the 0.7-2 GHz linkage control two-way output switch filter component, and turning to S4.
S4: and (5) establishing a three-dimensional electromagnetic field simulation model according to the PCB and structural design of the 0.7-2 GHz linkage control two-way output switch filter assembly to obtain a three-dimensional electromagnetic field simulation result, and switching to S5.
S5: and according to the three-dimensional electromagnetic field simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly, carrying out field-path joint simulation modeling on the assembly to obtain a field-path joint simulation result.
S6: and processing the two-way output switch filter assembly according to the field path joint simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly.
Compared with the prior art, the invention has the remarkable advantages that:
(1) By adopting a multi-layer board and field path joint simulation technology, the switch filter component based on MMIC is found, the thickness is designed to be 10mm, the 0.7-2 GHz signal can be flexibly amplified, power divided, attenuated, switch selected and filtered, the radio frequency signal meeting the requirements is output, and the requirements of the P/L band variable frequency channel on the radio frequency front end are met.
(2) The switch filter component has the advantages of simple structural design, low manufacturing cost, strong universality, consistent field-path joint simulation result and actual measurement result and guiding function in the design of a radar receiver.
(3) The size of the switch filter component manufactured by the invention is 90mm multiplied by 80mm multiplied by 10mm, the weight is 173g, and the thickness of the component is 10mm, so that the thickness of an ASAAC plugboard is 24mm from the original 28mm, and the microwave subsystem cabinet of the radar receiver meets the requirement of miniaturization.
Drawings
FIG. 1 is a flow chart of a design method of a 0.7-2 GHz linkage control two-way output switch filter assembly.
FIG. 2 is a block diagram of a 0.7-2 GHz linkage control two-way output switch filter assembly.
FIG. 3 is a schematic diagram of a 0.7-2 GHz linkage control two-way output switch filter assembly first-stage pi-attenuation and first-stage power divider.
FIG. 4 is a schematic diagram of a digital control attenuator and a second-stage power divider of the 0.7-2 GHz linkage control two-way output switch filter assembly.
FIG. 5 is a schematic diagram of a 0.7-2 GHz coordinated control two-way output switch filter assembly amplifier and second stage pi attenuation.
Fig. 6 is a schematic diagram of a 0.7-2 GHz coordinated control two-way output switch filter assembly SP3T and a filter bank.
FIG. 7 is a schematic diagram of power and control of a 0.7-2 GHz linkage control two-way output switch filter assembly.
FIG. 8 is a schematic diagram simulation modeling of the 0.7-2 GHz coordinated control two-way output switch filter assembly.
FIG. 9 is a PCB diagram of a 0.7-2 GHz linkage control two-way output switch filter assembly.
FIG. 10 is a block diagram of a 0.7-2 GHz linkage control two-way output switch filter assembly box and a batten.
FIG. 11 is a simulation model of a three-dimensional electromagnetic field of the 0.7-2 GHz linkage control two-way output switch filter assembly.
FIG. 12 is a field path joint simulation model of the 0.7-2 GHz linkage control two-way output switch filter assembly.
Detailed Description
In order to improve working efficiency, the invention discloses a design method of a 0.7-2 GHz linkage control double-way output switch filter assembly, which has the defects that on the basis of schematic diagram circuit simulation, a box body, a barrier bar and a PCB of the switch filter assembly are subjected to three-dimensional electromagnetic field simulation modeling to obtain more accurate simulation results of electric field energy, magnetic field energy and S parameters, and the simulation results relate to the simulation requirements of system-level modeling of active devices, passive devices and PCB S parameters of a radio frequency circuit.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without creative efforts, are within the scope of the present invention based on the embodiments of the present invention.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to base that the technical solutions can be implemented by those skilled in the art, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered to be absent, and not included in the scope of protection claimed in the present invention.
The following describes the specific embodiments, technical difficulties and inventions of the present invention in further detail in connection with the present design examples.
Referring to fig. 1, a design method for a 0.7-2 GHz linkage control two-way output switch filter assembly comprises the following steps:
s1: the block diagram of the scheme formulated for the 0.7-2 GHz linkage control two-way output switch filter assembly is shown in figure 2 according to the technical index requirement of the 0.7-2 GHz linkage control two-way output switch filter assembly in the radar receiver.
The 0.7-2 GHz linkage control two-way output switch filter assembly comprises a first-stage pi-attenuation, a first power divider, a numerical control attenuator, a second power divider, two paths of amplification attenuation circuits, three parallel filter banks and 4 single-pole three-throw switches, wherein the amplification attenuation circuits comprise amplifiers, a second-stage pi-attenuation I and a second-stage pi-attenuation II which are sequentially connected, the 0.7-2 GHz signals are divided into two paths after passing through the first-stage pi-attenuation and the first-stage power divider, the two paths are called as a first path and a second path, the second path of signals are output for other frequency conversion treatment, the first path of signals are subjected to numerical control attenuation and are divided into two paths by the second power divider, the two paths of signals are respectively sent into the two amplification attenuation circuits for amplification in sequence, the second-stage pi-attenuation, and then are sent into the corresponding filter banks through single-pole three-throw switches for selection, and then the third single-pole three-throw switch and the fourth single-pole three-throw switch are respectively selected, and the three-way working signals can be output through control and switch selection. When the 1 st channel outputs 740MHz signal, the 2 nd channel outputs 837.5MHz signal; when the 1 st channel outputs 1090MHz signal, the 2 nd channel outputs 1030MHz signal; when the 1 st channel outputs the 1532MHz signal, the 2 nd channel outputs the 1464MHz signal.
S2: schematic diagrams are designed according to the scheme block diagram and are shown in fig. 3-7, and schematic diagram simulation models are obtained according to the schematic diagrams and are shown in fig. 8.
The schematic diagrams are shown in fig. 3-7, and the first-stage pi-attenuation, the second-stage pi-attenuation I and the second-stage pi-attenuation II all adopt 3dB pi-attenuation, and comprise a first adjustable resistor R1 (RMK 1608MB180J,18 ohms), a second adjustable resistor R2 (RMK 1608MB301J,300 ohms) and a third adjustable resistor R3 (RMK 1608MB301J,300 ohms). The first end of the second adjustable resistor R2 is connected to the first end of the first adjustable resistor R1, and the second end is grounded; the first end of the third adjustable resistor R3 is connected with the second end of the first adjustable resistor R1, and the second end is grounded. The first power divider and the second power divider adopt GP2S1+ of MINI company in America; the amplifier uses TQP M9028 of TriQuint Co., USA; the numerical control attenuator adopts BW150SM4M of medium power 13.
The 4 single-pole three-throw switches all adopt BW1027DPQ4 of medium electricity 13, and the working frequency of the single-pole three-throw switch of the reflective gallium arsenide technology covers 0.1-18 GHz. The control voltage of the single-pole three-throw switch is shown in table 1, and when the control voltage is 0 to +0.2v, the control bit is low; when the control voltage is +3.3 to +5.5V, the control bit is high. The 3 filter banks are 2 YMB 740/1090-8/24, 2YMRB837.5/1532-8-4C and 2 YMB 1030/1464-24/20, respectively.
Table 1 control voltage for single pole three throw switch
| Status of | Bias condition |
| Low and low | 0～+0.2V |
| High height | +3.3～+5.5V |
S3: the PCB design of the component is shown in figure 9 and the structural design is shown in figure 10 according to the schematic diagram simulation result of the 0.7-2 GHz linkage control two-way output switch filter component.
The design adopts the multilayer board technology, integrates 3 kinds of filter banks with 4 single-pole three-throw switches, thus the discrete 3 kinds of filter bank components are designed integrally, and the channel is integrated with pi attenuation, a power divider, a numerical control attenuator and an amplifier, thus realizing signal attenuation, power division, numerical control attenuation, amplification, switch selection and filtering treatment of the microwave channel. The PCB board is RO4350B, four layers of boards, the total thickness is 0.8mm, wherein, the copper-clad thickness is 0.035mm, the thickness of the dielectric material RO4350B is 0.254mm, and the thickness of the prepreg RO4450F is 0.152mm. The intermediate dielectric plate of the transition plate of the switch filter assembly is RO4350B, the total thickness is 0.324mm, wherein the thickness of the copper coating is 0.035mm, and the thickness of the dielectric material is 0.254mm.
S4: and according to the PCB and structural design of the 0.7-2 GHz linkage control two-way output switch filter assembly, a three-dimensional electromagnetic field simulation model is carried out, as shown in figure 11, and a three-dimensional electromagnetic field simulation result is obtained.
In the three-dimensional electromagnetic field simulation model, a transient solver and a hexahedral mesh generation method are adopted, and the innovation point is that a copper-clad layer with the thickness of 0.035mm of a 0.7-2 GHz linkage control double-way output switch filter assembly is locally encrypted, the number of the hexahedral mesh generation is increased, and a box body structure of the switch filter assembly is added in the simulation model, so that the accurate three-dimensional electromagnetic field simulation of the switch filter assembly is realized. Based on schematic circuit simulation, the invention carries out three-dimensional electromagnetic field simulation modeling on the box body, the barrier strip and the PCB of the 0.7-2 GHz linkage control double-way output switch filter assembly to obtain S parameter simulation results of discrete ports of the PCB.
S5: and according to the three-dimensional electromagnetic field simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly, carrying out field-path joint simulation modeling on the assembly to obtain a field-path joint simulation result.
The difficulty is that the simulation requirements of the active device, the passive device and the system level modeling of the radio frequency circuit are related, the simulation difficulty is high, the innovation point is that the S parameters of the active device, the passive device and the PCB are established into a system level simulation model, and the active device, the passive device and the discrete ports of the PCB are connected by a moment method, so that the system level modeling is formed. The invention carries out field joint simulation modeling on the 0.7-2 GHz linkage control double-way output switch filter assembly on the basis of three-dimensional electromagnetic field simulation and schematic diagram circuit simulation to obtain the field joint simulation result, namely gain, noise coefficient and P -1 And (5) a field joint simulation curve.
S6: and processing the two-way output switch filter assembly according to the field path joint simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly.
The TTL control truth table of the single-pole three-throw switch for 3 paths RF1 to RF3 is shown in table 2, when designing the switch filter assembly PCB, VPA and VPB of the single-pole three-throw switches at the input ends of 2 filters are respectively connected in series, and VPA and VPB of the single-pole three-throw switches at the output ends of 2 filters are respectively connected in series, so that linkage control of two paths of output signals is realized.
Table 2 TTL control truth table for single pole three throw switch
The RF input/output connector adopts a JSM P (M) -JHD1 radio frequency connector of the Siemens Ailite manufacturer, so that the sealing design of the assembly is realized. The power-on control connector adopts a J30JMI-15ZKS19 rectangular connector of the Siemens Ailite manufacturer, and the interface network labels and functions are shown in table 3. The voltage stabilizing block adopts LT1764EFE to realize the external power-up voltage stabilization of +6V to +5V needed by work.
Table 3 interface network labels and functions for rectangular connector J30JMI-15ZKS19
| Terminal number | Network labels | Function of |
| 1 | A_CTRL_1A | 5dB control bit of |
| 2 | A_CTRL_3A | 20dB control position of |
| 3 | S1_VPB | Single-pole three-throw switch VPB linkage control position at input end of |
| 4 | S3_VPA | Single-pole three-throw switch VPA linkage control position at output end of |
| 5 | AGND | Grounded (earth) |
| 6 | -5V | - |
| 7 | +6V | + |
| 8 | +6V | + |
| 9 | A_CTRL_2A | 10dB control position of |
| 10 | S1_VPA | Single-pole three-throw switch VPA linkage control position at input end of |
| 11 | S3_VPB | Single-pole three-throw switch at output end of filterVPB coordinated |
| 12 | AGND | Grounded (earth) |
| 13 | AGND | Grounded (earth) |
| 14 | -5V | - |
| 15 | +6V | +6V power supply |
The interface network labels and functions of the rectangular connector are shown, +6V and-5V are adopted for power up, the numerical control attenuator adopts components of the intermediate power 13, the basic attenuation bits are 5dB, 10dB and 20dB, the total attenuation amount is 35dB, the control bits are controlled by serial codes, namely A_CTRL_ A, A _CTRL_2A and A_CTRL_3A, and the 5dB, 10dB and 20dB attenuation control bits of the numerical control attenuator BW150SM4M in the RF link are respectively controlled. S1_vpa and s1_vpb represent the single-pole three-throw switch VPA and VPB linkage control bits of the filter input end, and s3_vpa and s3_vpb represent the single-pole three-throw switch VPA and VPB linkage control bits of the filter output end. The control code table of the switching filter assembly is shown in table 4, wherein 1 represents the high order and 0 represents the low order.
Table 4 control code table for switch filter assembly
| S1_VPA | S1_VPB | S3_VPA | S3_VPB | Remarks |
| 1 | 0 | 1 | 1 | 736-744 |
| 0 | 1 | 0 | 1 | 1078-1102 |
| 1 | 1 | 1 | 0 | 1528-1536 |
| 1 | 0 | 1 | 1 | 833.5-841.5 |
| 0 | 1 | 0 | 1 | 1018-1042 MHz channel |
| 1 | 1 | 1 | 0 | 1454-1474 MHz channel gating |
The size of the switch filter assembly in the invention is 90mm multiplied by 80mm multiplied by 10mm, and the weight is 173g. The thickness of the assembly is designed to be 10mm, so that the thickness of the ASAAC plugboard is reduced from the original 28mm to 24mm, and the microwave subsystem chassis of the radar receiver meets the requirement of miniaturization.
Claims (5)
1. A design method of a 0.7-2 GHz linkage control two-way output switch filter assembly is characterized by comprising the following steps:
s1: according to the technical index requirement of the 0.7-2 GHz linkage control two-way output switch filter assembly in the radar receiver, a scheme is formulated for the 0.7-2 GHz linkage control two-way output switch filter assembly, and the S2 is shifted;
s2: according to the establishment scheme and combining the schematic diagram, obtaining a schematic diagram simulation model, and switching to S3;
s3: carrying out PCB design and structural design on the component according to the result of a schematic diagram simulation model of the 0.7-2 GHz linkage control two-way output switch filter component, and turning to S4;
s4: according to the PCB and structural design of the 0.7-2 GHz linkage control two-way output switch filter assembly, a three-dimensional electromagnetic field simulation model is established, a three-dimensional electromagnetic field simulation result is obtained, and S5 is carried out;
s5: according to the three-dimensional electromagnetic field simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly, carrying out field joint simulation modeling on the assembly to obtain a field joint simulation result;
s6: and processing the two-way output switch filter assembly according to the field path joint simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly.
2. The design method of the 0.7-2 GHz linkage control two-way output switch filter assembly according to claim 1, wherein in S1, according to the technical index requirement of the 0.7-2 GHz linkage control two-way output switch filter assembly in a radar receiver, a scheme is formulated for the 0.7-2 GHz linkage control two-way output switch filter assembly, and the scheme is specifically as follows:
the 0.7-2 GHz linkage control two-way output switch filter assembly comprises a first-stage pi-attenuation, a first power divider, a numerical control attenuator, a second power divider, two paths of amplification and attenuation circuits, three parallel filter banks and 4 single-pole three-throw switches, wherein the amplification and attenuation circuits comprise amplifiers, a second-stage pi-attenuation I and a second-stage pi-attenuation II which are sequentially connected, the 0.7-2 GHz signals are divided into two paths after passing through the first-stage pi-attenuation and the first-stage power divider, the first path and the second path are called as a first path and a second path, the second path of signals are output for other frequency conversion treatment, the first path of signals are subjected to numerical control attenuation and are divided into two paths by the second power divider, the two paths of signals are respectively sent into the two amplification and attenuation circuits for amplification in sequence, the second-stage pi-attenuation, and then are sent into the corresponding filter banks through single-pole three-throw switches for selection, and then the third single-pole three-throw switch and the fourth single-pole three-throw switch are respectively selected, and the two paths of working signals are output through control and switch selection; when the 1 st channel outputs 740MHz signal, the 2 nd channel outputs 837.5MHz signal; when the 1 st channel outputs 1090MHz signal, the 2 nd channel outputs 1030MHz signal; when the 1 st channel outputs the 1532MHz signal, the 2 nd channel outputs the 1464MHz signal.
3. The design method of the 0.7-2 GHz linkage control two-way output switch filter assembly according to claim 2, wherein in S3, the PCB design and the structural design are carried out on the assembly according to the result of a schematic diagram simulation model of the 0.7-2 GHz linkage control two-way output switch filter assembly, and the method is specifically as follows:
the design adopts the multilayer board technology, integrates 3 kinds of filter banks with 4 single-pole three-throw switches, thus the discrete 3 kinds of filter bank components are designed integrally, and the channel is integrated with pi attenuation, a power divider, a numerical control attenuator and an amplifier, thus realizing signal attenuation, power division, numerical control attenuation, amplification, switch selection and filtering treatment of the microwave channel.
4. The design method of the 0.7-2 GHz linkage control two-way output switch filter assembly according to claim 3, wherein in S4, a three-dimensional electromagnetic field simulation model is built according to the PCB and the structural design of the 0.7-2 GHz linkage control two-way output switch filter assembly, and a three-dimensional electromagnetic field simulation result is obtained, specifically as follows: in a three-dimensional electromagnetic field simulation model, a transient solver and a hexahedral mesh dividing method are adopted to locally encrypt a copper-clad layer of the 0.7-2 GHz linkage control two-way output switch filter assembly, the number of the hexahedral mesh dividing is increased, and a box body structure of the switch filter assembly is added in the simulation model, so that accurate three-dimensional electromagnetic field simulation of the switch filter assembly is realized; based on schematic circuit simulation, the three-dimensional electromagnetic field simulation modeling is carried out on the box body, the barrier strip and the PCB of the 0.7-2 GHz linkage control two-way output switch filter assembly, so that S parameter simulation results of discrete ports of the PCB are obtained.
5. The design method of the 0.7-2 GHz linkage control two-way output switch filter assembly according to claim 4, wherein in S5, according to the three-dimensional electromagnetic field simulation result of the 0.7-2 GHz linkage control two-way output switch filter assembly, the assembly is subjected to field-path joint simulation modeling to obtain a field-path joint simulation result, and the method is specifically as follows:
establishing a system-level simulation model by using S parameters of an active device, a passive device and a PCB, and connecting the active device, the passive device and a discrete port of the PCB by a moment method so as to form a system-level modeling; on the basis of three-dimensional electromagnetic field simulation and schematic diagram circuit simulation, field joint simulation modeling is carried out on the 0.7-2 GHz linkage control two-way output switch filter assembly to obtain field joint simulation results, namely gain, noise coefficient and P -1 And (5) a field joint simulation curve.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116562202A (en) * | 2023-07-11 | 2023-08-08 | 广汽埃安新能源汽车股份有限公司 | Filtering component analysis method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116562202A (en) * | 2023-07-11 | 2023-08-08 | 广汽埃安新能源汽车股份有限公司 | Filtering component analysis method and device |
| CN116562202B (en) * | 2023-07-11 | 2023-09-08 | 广汽埃安新能源汽车股份有限公司 | Filtering component analysis method and device |
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