CN104143971A - Negative group delay circuit - Google Patents
Negative group delay circuit Download PDFInfo
- Publication number
- CN104143971A CN104143971A CN201410376234.6A CN201410376234A CN104143971A CN 104143971 A CN104143971 A CN 104143971A CN 201410376234 A CN201410376234 A CN 201410376234A CN 104143971 A CN104143971 A CN 104143971A
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- group delay
- negative group
- coupler
- main circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- Y02B60/50—
Landscapes
- Amplifiers (AREA)
Abstract
The invention discloses a negative group delay circuit. The circuit structure is composed of a 3dB coupler, a distributed microstrip line, a serial connection RLC resonance unit and a complex impedor. The negative group delay circuit can be widely applied to the front end of a 5G mobile communication power amplifier, radar antenna feed and other places where the signal performance is strictly required. The number of levels of the circuit power amplifier can be effectively reduced, the passband external noise can be lowered, and the stability of an electronic line is improved. Meanwhile, compared with negative group delay circuits with other structures, the negative group delay circuit is high in stability, small in size, easy to machine and wide in application range.
Description
Technical field
The invention belongs to communication and electronic application field, particularly in radio frequency and filter network, there is important application.
Background technology
In the last few years, carried out a series of research about negative group delay circuit in radio frequency and filter network both at home and abroad.Obtained a lot of achievements in research, be especially used in mobile communication technology, used in power amplifier front end and radar antenna feed part, negative group delay circuit can effectively solve that system linear degree is low, narrow bandwidth, problem that passband external noise is large.But its project organization can only use in specific frequency range, and bandwidth is less, signal attenuation is larger, causes having to increase the number of power amplifier, makes system bulk larger, versatility is not strong.Simultaneously traditional negative group delay circuit is due to the problem of its circuit structure, makes temperature sensitivity extremely strongly, and applicability is very limited.The present invention is directed to above problem, can effectively solve, to meet system requirements, and stability is high, volume is little, processing is simple, applied widely.
Summary of the invention
The invention provides a kind of have negative group delay, simple in structure, multiband, volume is little, stability is high negative group delay circuit.
The technical scheme that realizes the object of the invention is: a kind of negative group delay circuit, comprise input port 1, output port 2,
One
coupler, the first main circuit unit and the second main circuit unit that structure is identical; Wherein each main circuit unit is by a complex impedance, two sections of microstrip lines and a series resonance unit composition; The first main circuit unit is connected with coupler, complex impedance in unit
one end is connected with coupler, other end ground connection; Microstrip line
one end and impedance
connect the other end and resonance
unit connects;
resonant element is in series by resistance R 1, inductance L 1, capacitor C 1, two ends respectively with microstrip line
and microstrip line
connect; Microstrip line
with
resonant element series connection; The second main circuit unit is connected with coupler, complex impedance in unit
one end is connected with coupler, other end ground connection; Microstrip line
one end and impedance
connect the other end and resonance
unit connects;
resonant element is in series by resistance R 2, inductance L 2, capacitor C 2, two ends respectively with microstrip line
and microstrip line
connect; Microstrip line
with
resonant element series connection; Input port 1 and input port 2 all connect 50 ohmages.
Compared with prior art, the invention provides a kind of have negative group delay, simple in structure, multiband, volume is little, stability is high feature.
Brief description of the drawings
Fig. 1 is the negative group delay of a kind of micro-band of the present invention
series resonance unit.
Fig. 2 is the negative group delay of a kind of micro-band of the present invention
series resonance returns response.
Fig. 3 is the negative group delay of a kind of micro-band of the present invention
series resonance phase curve.
Fig. 4 is a kind of negative group delay electrical block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
In conjunction with Fig. 1, Fig. 4, the present invention is the negative group delay circuit of a kind of microstrip type, comprise input port 1, output port 2, one
coupler, the first main circuit unit and the second main circuit unit that structure is identical; Wherein each main circuit unit is by an impedance, two sections of microstrip lines and a series resonance unit (as shown in Figure 1) composition, and series resonance unit returns response as shown in Figure 2, and its phase curve as shown in Figure 3; The first main circuit unit is connected with coupler, unit internal impedance
one end is connected with coupler, other end ground connection; Microstrip line
one end and impedance
connect the other end and resonance
unit connects;
resonant element is in series by resistance R 1, inductance L 1, capacitor C 1, two ends respectively with microstrip line
and microstrip line
connect; Microstrip line
with
resonant element series connection; The second main circuit unit is connected with coupler, unit internal impedance
one end is connected with coupler, other end ground connection; Microstrip line
one end and impedance
connect the other end and resonance
unit connects;
resonant element is in series by resistance R 2, inductance L 2, capacitor C 2, two ends respectively with microstrip line
and microstrip line
connect; Microstrip line
with
resonant element series connection; Input port 1 and input port 2 all connect 50 ohmages.
In the time that all parameters change, now maximum negative reach-10ns of group delay, centre frequency is 3.62GHz, bandwidth is 200MHz.This result, much smaller than conventional negative group delay circuit, can effectively reduce the number of power amplifier, and result represents that invention design performance is good, can meet the requirement of system.
The present invention is a kind of negative group delay circuit, and in conjunction with Fig. 3, its operation principle is summarized as follows: the agent structure of the negative group delay circuit of a kind of modified model is to be made up of a 3dB coupler.When signal enters after input main circuit, can be by regulating microstrip line and the impedance in main circuit
size, and series resonance unit (
) change institute's frequency range, utilize coupler principle, couple a signal to output port, thereby realized negative group delay effect, particularly in radio frequency and filter network, there is important application.
Claims (2)
1. a negative group delay circuit, is characterized in that: comprise input port 1, output port 2, one
coupler, the first main circuit unit and the second main circuit unit that structure is identical; Wherein each main circuit unit is by a complex impedance, two sections of microstrip lines and a series resonance unit composition; The first main circuit unit is connected with coupler, unit internal impedance
one end is connected with coupler, other end ground connection; Microstrip line
one end and impedance
connect the other end and resonance
unit connects;
resonant element is in series by resistance R 1, inductance L 1, capacitor C 1, two ends respectively with microstrip line
and microstrip line
connect; Microstrip line
with
resonant element series connection; The second main circuit unit is connected with coupler, unit internal impedance
one end is connected with coupler, other end ground connection; Microstrip line
one end and impedance
connect the other end and resonance
unit connects;
resonant element is in series by resistance R 2, inductance L 2, capacitor C 2, two ends respectively with microstrip line
and microstrip line
connect; Microstrip line
with
resonant element series connection; Input port 1 and input port 2 all connect 50 ohmages.
2. according to the negative group delay circuit described in claim 1, it is characterized in that: 3dB coupler adopts distributed microstrip line to realize, main circuit unit adopt distributed microstrip line construction with
the realization of connecting of series resonance unit component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410376234.6A CN104143971A (en) | 2014-08-03 | 2014-08-03 | Negative group delay circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410376234.6A CN104143971A (en) | 2014-08-03 | 2014-08-03 | Negative group delay circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104143971A true CN104143971A (en) | 2014-11-12 |
Family
ID=51853060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410376234.6A Pending CN104143971A (en) | 2014-08-03 | 2014-08-03 | Negative group delay circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104143971A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852700A (en) * | 2015-06-12 | 2015-08-19 | 王少夫 | Zero-adjustment group delay circuit |
| CN107453727B (en) * | 2017-08-07 | 2021-01-15 | 大连海事大学 | Low-insertion-loss negative group time delay microwave circuit |
| CN107508572B (en) * | 2017-08-07 | 2021-01-15 | 大连海事大学 | Broadband negative group time delay microwave circuit based on distributed parameter realization |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120037250A (en) * | 2010-10-11 | 2012-04-19 | 세원텔레텍 주식회사 | Feedforward linear power amplifier with negative group delay circuit |
| CN103684332A (en) * | 2013-12-30 | 2014-03-26 | 南京理工大学 | Distributed type adjustable negative group time-delay circuit |
| CN103684346A (en) * | 2013-12-31 | 2014-03-26 | 南京理工大学 | Dual-band high-performance negative group delay circuit |
| CN103716024A (en) * | 2013-12-31 | 2014-04-09 | 南京理工大学 | Combined negative group delay circuit |
| CN204206139U (en) * | 2014-08-03 | 2015-03-11 | 王少夫 | A kind of negative group delay circuitry |
-
2014
- 2014-08-03 CN CN201410376234.6A patent/CN104143971A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120037250A (en) * | 2010-10-11 | 2012-04-19 | 세원텔레텍 주식회사 | Feedforward linear power amplifier with negative group delay circuit |
| CN103684332A (en) * | 2013-12-30 | 2014-03-26 | 南京理工大学 | Distributed type adjustable negative group time-delay circuit |
| CN103684346A (en) * | 2013-12-31 | 2014-03-26 | 南京理工大学 | Dual-band high-performance negative group delay circuit |
| CN103716024A (en) * | 2013-12-31 | 2014-04-09 | 南京理工大学 | Combined negative group delay circuit |
| CN204206139U (en) * | 2014-08-03 | 2015-03-11 | 王少夫 | A kind of negative group delay circuitry |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852700A (en) * | 2015-06-12 | 2015-08-19 | 王少夫 | Zero-adjustment group delay circuit |
| CN107453727B (en) * | 2017-08-07 | 2021-01-15 | 大连海事大学 | Low-insertion-loss negative group time delay microwave circuit |
| CN107508572B (en) * | 2017-08-07 | 2021-01-15 | 大连海事大学 | Broadband negative group time delay microwave circuit based on distributed parameter realization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141112 |