CN104682947A - Simple adjustable coupler circuit - Google Patents
Simple adjustable coupler circuit Download PDFInfo
- Publication number
- CN104682947A CN104682947A CN201510124969.4A CN201510124969A CN104682947A CN 104682947 A CN104682947 A CN 104682947A CN 201510124969 A CN201510124969 A CN 201510124969A CN 104682947 A CN104682947 A CN 104682947A
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- CN
- China
- Prior art keywords
- port
- inductance
- electric capacity
- coupler circuit
- coupler
- 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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Abstract
The invention discloses a simple adjustable coupler circuit which comprises inductors and adjustable capacitors. The simple adjustable coupler circuit can be widely applied to places with strict requirements on signal performance such as WCDMA mobile communication systems, radar antennas and RFID transceivers. Out-of-band noise can be inhibited, and the stability of an electronic circuit can be improved. In addition, compared with coupler circuits of other structures, a coupler can be adjustable and the simple adjustable coupler circuit can be applied to different frequency bands of a communication system.
Description
Technical field
The present invention relates to a kind of coupler circuit, particularly a kind of adjustable coupler circuit, belong to communication and electronic application field, particularly in radio circuit, there is important application.
Background technology
In the last few years, a series of research about filter circuit had been carried out both at home and abroad.Achieve a lot of achievement in research, be especially used in mobile communication technology, be used in power-amplifier front-end and radar antenna feed part, filter circuit 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 coupler circuit 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, can effectively solve, to meet system requirements, and stability is high, volume is little, compact conformation, processing are simple, applied widely.
Summary of the invention
The invention provides and a kind of there is adjustable, that structure is simple, volume is little, stability is high coupler circuit.
The technical scheme realizing the object of the invention is: a kind of easy variable coupler circuit, comprises input port 1, output port 2, coupling inductance
, two passive inductance
, three tunable capacitors; Coupling inductance
two ports respectively with inductance
be connected, another two ports are connected to the ground and connect; Inductance
the other end respectively with electric capacity
two-port is connected; Electric capacity
two-port respectively with electric capacity
port is connected, electric capacity
other end ground connection.Port one ~ 4 all connect 50 ohmages.
Compared with prior art, the invention provides the feature that a kind of adjustable, structure is simple, multiband, compact conformation, stability are high.
Accompanying drawing explanation
Fig. 1 is a kind of easy variable coupler circuit of the present invention.
Fig. 2 is a kind of easy variable coupler circuit insertion loss response of the present invention.
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 adjustable simple and easy coupler circuit, and handbag draws together input port 1, output port 2, coupling inductance
, two passive inductance
, three tunable capacitors; Coupling inductance
two ports respectively with inductance
be connected, another two ports are connected to the ground and connect; Inductance
the other end respectively with electric capacity
two-port is connected; Electric capacity
two-port respectively with electric capacity
port is connected, electric capacity
other end ground connection.Port one ~ 4 all connect 50 ohmages.
Work as inductance
=1nH, capacitance is
=1pF, tunable capacitor
pF,
during nH, its insertion loss as shown in Figure 2; Coupler can be on a single die integrated with 5.8GRFID reader transceiver.
This kind of adjustable coupler device oneself be used successfully in 5.8GRFID reader transceiver, Output rusults is good.Use result to show that this device has good degree of suppression to channel receiver pulse and noise level, effectively overcome and adopt the problem that conventional coupler is too complicated, volume is excessive, can ensure that device obtains best channel signal transmission and isolation effect.
Claims (2)
1. an easy variable coupler circuit, is characterized in that: comprise four ports (1 ~ 4),
resonant element, four arm-type inductance
~
, tunable capacitor
and electric capacity
~
realize; Wherein
one end of resonant element and inductance
one end be connected, the other end and inductance
one end be connected; Inductance
the other end be connected with port one, port 2 respectively; Inductance
the other end be connected with port 3, port 4 respectively; Two tunable capacitors
one end be connected with port one, port 2 respectively; The other end is connected with port 3, port 4 respectively; Two electric capacity
one end be connected with port one, port 2 respectively, the other end is connected to the ground and connects; Electric capacity
one end with
resonant element is connected, and the other end is connected to the ground and connects; Two electric capacity
one end be connected with port 3, port 4 respectively, the other end is connected to the ground and connects; Electric capacity
one end with
the other end of resonant element is connected, and its other end is connected to the ground and connects; Input port 1 and input port 2 all connect 50 ohmages.
2. according to the simple and easy variable coupler circuit described in claim 1, it is characterized in that: this circuit structure is realized by inductance, tunable capacitor, and electric capacity all adopts tunable capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510124969.4A CN104682947A (en) | 2015-03-23 | 2015-03-23 | Simple adjustable coupler circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510124969.4A CN104682947A (en) | 2015-03-23 | 2015-03-23 | Simple adjustable coupler circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104682947A true CN104682947A (en) | 2015-06-03 |
Family
ID=53317603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510124969.4A Pending CN104682947A (en) | 2015-03-23 | 2015-03-23 | Simple adjustable coupler circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104682947A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024685A (en) * | 2015-08-12 | 2015-11-04 | 王帅 | Novel coupler |
| CN105553463A (en) * | 2016-02-01 | 2016-05-04 | 徐园园 | Novel multiport coupler |
| CN110856339A (en) * | 2019-11-22 | 2020-02-28 | 普联技术有限公司 | Planar circuit for signal cross transmission |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908881A (en) * | 2010-07-28 | 2010-12-08 | 锐迪科创微电子（北京）有限公司 | Directional coupler and radio-frequency power amplifier containing same |
| US20140049307A1 (en) * | 2012-08-14 | 2014-02-20 | Viasat, Inc. | Circuits and methods for sharing bias current |
| CN104218939A (en) * | 2014-09-17 | 2014-12-17 | 王少夫 | Adjustable hybrid coupler circuit |
| CN204442340U (en) * | 2015-03-23 | 2015-07-01 | 徐园园 | A kind of easy variable coupler circuit |
-
2015
- 2015-03-23 CN CN201510124969.4A patent/CN104682947A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908881A (en) * | 2010-07-28 | 2010-12-08 | 锐迪科创微电子（北京）有限公司 | Directional coupler and radio-frequency power amplifier containing same |
| US20140049307A1 (en) * | 2012-08-14 | 2014-02-20 | Viasat, Inc. | Circuits and methods for sharing bias current |
| CN104218939A (en) * | 2014-09-17 | 2014-12-17 | 王少夫 | Adjustable hybrid coupler circuit |
| CN204442340U (en) * | 2015-03-23 | 2015-07-01 | 徐园园 | A kind of easy variable coupler circuit |
Non-Patent Citations (1)
| Title |
|---|
| 邓腾彬等: ""三分支可变阻抗任意分贝集总元件定向耦合器"", 《电子元件与材料》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024685A (en) * | 2015-08-12 | 2015-11-04 | 王帅 | Novel coupler |
| CN105553463A (en) * | 2016-02-01 | 2016-05-04 | 徐园园 | Novel multiport coupler |
| CN110856339A (en) * | 2019-11-22 | 2020-02-28 | 普联技术有限公司 | Planar circuit for signal cross transmission |
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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: 20150603 |