CN104993801A - Duplexer circuit - Google Patents
Duplexer circuit Download PDFInfo
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- CN104993801A CN104993801A CN201510462846.1A CN201510462846A CN104993801A CN 104993801 A CN104993801 A CN 104993801A CN 201510462846 A CN201510462846 A CN 201510462846A CN 104993801 A CN104993801 A CN 104993801A
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Abstract
The invention discloses a duplexer circuit. A circuit structure is implemented through an inductor and a capacitor. The duplexer circuit can be widely applied to places with strict signal performance requirements such as a WLAN (Wireless Local Area Network) mobile communication power amplifier and a radar antenna. The out-of-band noise can be restrained, and the stability of an electronic circuit is enhanced. Compared with duplexer circuits of other structures, the duplexer circuit has the advantages that duplex filtering of an ultra-wide band and a linear phase is realized. Moreover, the duplexer circuit can be applied to WLAN communication systems of 2.5GHz and 5.2GHz.
Description
Technical field
The present invention relates to a kind of duplexer, belong to communication and electronic application field, particularly in mobile communication and radio circuit, there is important application.
Background technology
In the last few years, a series of research about duplicate circuitry had been carried out both at home and abroad.Achieve a lot of achievement in research, be especially used in wireless mobile telecommunication technology, be used in power-amplifier front-end and radar antenna feed part, duplicate circuitry effectively can solve the large problem of system passband external noise.But its project organization can only use in specific frequency range, and bandwidth is less, make system bulk comparatively large, and versatility is not strong.Simultaneously traditional duplicate circuitry is due to the problem of its circuit structure, and make temperature sensitivity extremely strong, applicability is very limited.The present invention is directed to above problem, adopt lamped element to realize duplexer, effectively can solve bandwidth, linear phase problem, to meet system requirements, and stability is high, volume is little, compact conformation, processing are simple, is suitable among wireless WLAN mobile communication and radio system.
Summary of the invention
The invention provides a kind of ultra broadband, linear phase, structure is simple, volume is little, stability is high wireless WLAN mobile communication and radio system duplex filter circuit.
The technical scheme realizing the object of the invention is: a kind of duplexer circuit, is characterized in that: comprise input port 1, output port 2, three electric capacity C
0, Ca, C
b; Four parallel resonance unit L
1c
1, L
2c
2, L
3c
3, L
4c
4and four parallel resonance unit LC; Input port 1 (Port1) is connected with node 1; Electric capacity C
0one end be connected with node 1, the other end is connected with node 2; Parallel resonance unit L
1c
1one end be connected with node 2, the other end is connected to the ground and connects; A parallel LC resonance unit between node 2 and node 3; Inductance L a one end is connected with node 3, and the other end is connected to the ground and connects; A parallel LC resonance unit between node 3 and node 4; Inductance L
5one end is connected with node 2, and the other end is connected with node 4; Parallel resonance unit L
2c
2one end be connected with node 4, the other end is connected to the ground and connects; Electric capacity Ca one end is connected with node 4, and the other end is connected with node 5; Parallel resonance unit L
3c
3one end be connected with node 5, the other end is connected to the ground and connects; A parallel LC resonance unit between node 5 and node 6; Inductance L
bone end is connected with node 6, and the other end is connected to the ground and connects; A parallel LC resonance unit between node 6 and node 7; Parallel resonance unit L
4c
4one end be connected with node 7, the other end is connected to the ground and connects; Inductance L
6one end is connected with node 5, and the other end is connected with node 7; Electric capacity C
bone end is connected with node 7, and the other end is connected with node 8; Port 2 is connected with node 8; Input port 1, output port 2 all connect 50 ohmages; This circuit structure is realized by lamped element inductance, electric capacity, and duplexer two passband central frequency is respectively 2.5GHz, 5.2GHz, is mainly used in wireless WLAN communications system.
Compared with prior art, the invention provides a kind of ultra broadband, linear phase, structure is simple, compact conformation, stability are high feature.
Accompanying drawing explanation
Fig. 1 is a kind of duplexer circuit figure of the present invention.
Fig. 2 is a kind of duplexer circuit S parameter of the present invention performance diagram.
Fig. 3 is a kind of duplexer circuit phase characteristic curve of the present invention figure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Composition graphs 1, the present invention is a kind of duplexer circuit, it is characterized in that: comprise input port 1, output port 2, three electric capacity C
0, Ca, C
b; Four parallel resonance unit L
1c
1, L
2c
2, L
3c
3, L
4c
4and four parallel resonance unit LC; Input port 1 (Port1) is connected with node 1; Electric capacity C
0one end be connected with node 1, the other end is connected with node 2; Parallel resonance unit L
1c
1one end be connected with node 2, the other end is connected to the ground and connects; A parallel LC resonance unit between node 2 and node 3; Inductance L a one end is connected with node 3, and the other end is connected to the ground and connects; A parallel LC resonance unit between node 3 and node 4; Inductance L
5one end is connected with node 2, and the other end is connected with node 4; Parallel resonance unit L
2c
2one end be connected with node 4, the other end is connected to the ground and connects; Electric capacity Ca one end is connected with node 4, and the other end is connected with node 5; Parallel resonance unit L
3c
3one end be connected with node 5, the other end is connected to the ground and connects; A parallel LC resonance unit between node 5 and node 6; Inductance L
bone end is connected with node 6, and the other end is connected to the ground and connects; A parallel LC resonance unit between node 6 and node 7; Parallel resonance unit L
4c
4one end be connected with node 7, the other end is connected to the ground and connects; Inductance L
6one end is connected with node 5, and the other end is connected with node 7; Electric capacity C
bone end is connected with node 7, and the other end is connected with node 8; Port 2 is connected with node 8; Input port 1, output port 2 all connect 50 ohmages; This circuit structure is realized by lamped element inductance, electric capacity, and duplexer two passband central frequency is respectively 2.5GHz, 5.2GHz, is mainly used in wireless WLAN communications system.
Composition graphs 2, can find out, two passband central frequencies are respectively 2.5GHz, 5.2GHz, wider bandwidth can be realized, there is ultra broadband, the most flat amplitude-frequency characteristic; Composition graphs 3, can find out, circuit of the present invention has linear phase characteristic.Designed this kind of ultra broadband, linear phase duplexer can be used in wireless WLAN mobile communication, and through the modulation and demodulation of FSK, Output rusults is good.Use result to show that this device has good degree of suppression to channel receiver modulating pulse and noise level, effectively overcome the ultra broadband of conventional diplexer, linear phase problem.Can ensure that device obtains best channel signal transmission effect.
Claims (1)
1. a duplexer circuit, is characterized in that: comprise input port 1, output port 2, three electric capacity C
0, Ca, C
b; Four parallel resonance unit L
1c
1, L
2c
2, L
3c
3, L
4c
4and four parallel resonance unit LC; Input port 1 is connected with node 1; Electric capacity C
0one end be connected with node 1, the other end is connected with node 2; Parallel resonance unit L
1c
1one end be connected with node 2, the other end is connected to the ground and connects; A parallel LC resonance unit between node 2 and node 3; Inductance L a one end is connected with node 3, and the other end is connected to the ground and connects; A parallel LC resonance unit between node 3 and node 4; Inductance L
5one end is connected with node 2, and the other end is connected with node 4; Parallel resonance unit L
2c
2one end be connected with node 4, the other end is connected to the ground and connects; Electric capacity Ca one end is connected with node 4, and the other end is connected with node 5; Parallel resonance unit L
3c
3one end be connected with node 5, the other end is connected to the ground and connects; A parallel LC resonance unit between node 5 and node 6; Inductance L
bone end is connected with node 6, and the other end is connected to the ground and connects; A parallel LC resonance unit between node 6 and node 7; Parallel resonance unit L
4c
4one end be connected with node 7, the other end is connected to the ground and connects; Inductance L
6one end is connected with node 5, and the other end is connected with node 7; Electric capacity C
bone end is connected with node 7, and the other end is connected with node 8; Port 2 is connected with node 8; Input port 1, output port 2 all connect 50 ohmages; This circuit structure is realized by lamped element inductance, electric capacity, and duplexer two passband central frequency is respectively 2.5GHz, 5.2GHz, is mainly used in wireless WLAN communications system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510462846.1A CN104993801A (en) | 2015-08-01 | 2015-08-01 | Duplexer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510462846.1A CN104993801A (en) | 2015-08-01 | 2015-08-01 | Duplexer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104993801A true CN104993801A (en) | 2015-10-21 |
Family
ID=54305566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510462846.1A Pending CN104993801A (en) | 2015-08-01 | 2015-08-01 | Duplexer circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104993801A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1537343A (en) * | 2001-04-11 | 2004-10-13 | Tuning multiplexer | |
| US20070296525A1 (en) * | 2006-06-22 | 2007-12-27 | Nec Electonics Corporation | Band-pass filter circuit |
| CN101621144A (en) * | 2009-08-11 | 2010-01-06 | 南京理工大学 | Miniature filter with low loss, high stop band and multi-zero suppression |
| CN104104349A (en) * | 2014-08-03 | 2014-10-15 | 王少夫 | Wireless filtering circuit |
| CN204681324U (en) * | 2015-08-01 | 2015-09-30 | 王福建 | A kind of duplexer circuit |
-
2015
- 2015-08-01 CN CN201510462846.1A patent/CN104993801A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1537343A (en) * | 2001-04-11 | 2004-10-13 | Tuning multiplexer | |
| US20070296525A1 (en) * | 2006-06-22 | 2007-12-27 | Nec Electonics Corporation | Band-pass filter circuit |
| CN101621144A (en) * | 2009-08-11 | 2010-01-06 | 南京理工大学 | Miniature filter with low loss, high stop band and multi-zero suppression |
| CN104104349A (en) * | 2014-08-03 | 2014-10-15 | 王少夫 | Wireless filtering circuit |
| CN204681324U (en) * | 2015-08-01 | 2015-09-30 | 王福建 | A kind of duplexer circuit |
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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: 20151021 |