CN2790040Y - Power amplification - Google Patents
Power amplification Download PDFInfo
- Publication number
- CN2790040Y CN2790040Y CNU2005200570340U CN200520057034U CN2790040Y CN 2790040 Y CN2790040 Y CN 2790040Y CN U2005200570340 U CNU2005200570340 U CN U2005200570340U CN 200520057034 U CN200520057034 U CN 200520057034U CN 2790040 Y CN2790040 Y CN 2790040Y
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- directional coupler
- circulator
- power amplifier
- port
- detecting circuit
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Abstract
The utility model is applied to the field of wireless communication, which provides a power amplification which is connected with a standing wave detecting device and a duplexer. The standing wave detecting device comprises a forward wave detecting circuit and a reverse wave detecting circuit. The power amplification at least comprises a power amplifier, a directional coupler and a circulator, wherein the directional coupler is cascaded with the power amplifier; a port 1 of the circulator is connected with the directional coupler, and a port 2 of the circulator is connected with the duplexer. The power amplification also comprises an attenuation resistor which is connected with a port 3 of the circulator; the attenuation resistor receives electromagnetic signals input by the port 3 of the circulator, and outputs reverse electromagnetic signals to the reverse wave detecting circuit. The directional coupler receives electromagnetic signals input by the power amplifier, and couplingly outputs forward electromagnetic signals to the forward wave detecting circuit. The utility model can detect the standing waves of the feeder system through the optimization and the improvement of the existing power amplification, realizing low cost and no need of adding additional volume, and is especially suitable for using in micro base stations.
Description
Technical field
The utility model relates to field of wireless communication, relates in particular to a kind of power amplifier.
Background technology
The antenna-feedback system of mobile communication base station is if open circuit, short circuit or other when causing the fault that the antenna-feedback system transfer impedance changes, can cause the reflection enhancement of base station power output at antenna-feedback system, aerial radiation power descends, phenomenons such as related generation base station range reduces, user capacity reduces, this fault of antenna-feedback system need detect by standing wave detecting device.
Standing wave detecting device judges by the standing-wave ratio that detects antenna-feedback system whether antenna-feedback system exists fault.Standing-wave ratio generally is meant the voltage standing wave(VSW) coefficient, and it is the ratio of the amplitude of adjacent maximum point and smallest point on the electromagnetic transmission line.Standing wave detection circuit in the standing wave monitoring device generally is divided into two parts, and a part is preceding backward-wave split circuit, and another part is the detection treatment circuit.The split circuit of preceding backward-wave is divided into two-way output with forward direction electromagnetic wave and reverse electromagnetic wave, the detection treatment circuit converts electromagnetic wave power to voltage output, can obtain standing-wave ratio by the voltage that compares forward wave and backward-wave, the detection treatment circuit comprises forward detection circuit and inverse detection circuit, and the backward-wave split circuit receives the forward direction electromagnetic wave signal and the reverse electromagnetic wave signal of output before the difference.
At present, mainly monitor the standing wave of antenna-feedback system by following three kinds of modes:
(1) do not having under the situation of standing wave detecting device, the disconnection base station is connected with feeder line, detect the standing wave of antenna-feedback system with network analyzer, judge according to test result whether antenna-feedback system has fault, need interrupting service to connect like this, must have simultaneously instruments such as network analyzer, realize complexity, bigger to service impact.
(2) standing wave detecting device is connected between base station machine top antenna port and the feeder line, detect antenna-feedback system and whether have fault, because feed is connected complicated with signal, generally be connected with the base station with cable by extra power supply, perhaps by radio frequency cable transmission signals and power supply between duplexer and the standing wave detecting device, adopt the former then line complexity, adopt the latter then need in duplexer and standing wave detecting device, design the modulation-demodulation circuit of Bias-T circuit and associated control signal and data, realize complicated.Simultaneously because the mobile communication base station has a plurality of external antenna ports usually, if each antenna port all install one independently standing wave detecting device can install to device context and increase workload, need to increase extra cost.
(3) integrated dual directional coupler in duplexer utilizes the dual directional coupler in the duplexer to be coupled out forward signal and reverse signal, and the split circuit of preceding backward-wave and detection treatment circuit are realized in duplexer or realized on another piece plate.Adopt this monitoring mode, the duplexer volume is increased, be unsuitable in little base station, using, if the split circuit of preceding backward-wave and detection treatment circuit are realized in duplexer on the other hand, in the volume that increases duplexer, duplexer is become source module is arranged, reliability decrease, if active part on another piece plate, realize, then also need extra volume and interface.
Summary of the invention
The purpose of this utility model be to solve realization complexity, standing wave that antenna-feedback system standing wave in the prior art exists in detecting detect cause device volume big, detect the high problem of cost.
For realizing goal of the invention, the utility model provides a kind of power amplifier, with standing wave detecting device, duplexer connects, described standing wave detecting device comprises forward direction detecting circuit and reverse detecting circuit, described power amplifier comprises power amplifier at least, directional coupler, circulator, described directional coupler and described power amplifier cascade, the port one of described circulator is connected with described directional coupler, port 2 is connected with described duplexer, described power amplifier also comprises damping resistance, described damping resistance is connected with the port 3 of described circulator, receives the electromagnetic signal of port 3 inputs of described circulator, exports reverse electromagnetic signal to described reverse detecting circuit;
Described directional coupler receives the electromagnetic signal of described power amplifier input, and coupling output forward direction electromagnetic signal is to described forward direction detecting circuit.
Described directional coupler is the 30dB directional coupler.
Described damping resistance is the 30dB damping resistance.
The utility model has been realized the standing wave of antenna-feedback system is detected by existing power amplifier is optimized and improves, and realizes that cost is low, and not needing increases extra volume, is particluarly suitable for using in little base station.
Description of drawings
Fig. 1 constitutes schematic diagram for base station radio frequency system;
The structure chart of the power amplifier that Fig. 2 the utility model provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model increases damping resistance by existing power amplifier is improved on the basis of existing power amplifier, can export to be used for forward signal and the reverse signal that standing wave detects, and can realize low-cost, easily the standing wave of antenna-feedback system is detected.
Fig. 1 is the structural representation of mobile communication base station transmission channel radio system, comprise transceiver 100, power amplifier 200, duplexer 300 and antenna 400, wherein, duplexer 300 is connected with antenna 400 by feeder line 500, and the wireless signal that send the base station is launched after power amplifier 200 amplifies.
Fig. 2 is the formation schematic diagram of power amplifier 200, comprises power amplifier 201, directional coupler 202, circulator 203, damping resistance 204 and the matched load 205 of mutual cascade, wherein:
Power amplifier 201 with directional coupler 202 cascades, arrives power grade such as the 20W that needs with the power amplification of radiofrequency signal, is input to directional coupler 202, through launching from antenna 400 after duplexer 300 filtering;
Directional coupler 202, the electromagnetic signal that received power amplifier 201 amplifies is coupled out the forward direction electromagnetic signal and exports to forward direction detecting circuit 601 and be used for standing wave and detect;
Circulator 203 is used for isolating reflected electromagnetic signal at power amplifier 200 ends, and circulator 203 has 3 ports, and port one connects directional coupler 202, and port 2 connects duplexer 300, and port 3 connects damping resistance 204.The electromagnetic signal of directional coupler 202 inputs exports duplexer 300 to from port 2 behind the port one of circulator 203; After the reflected electromagnetic signal of returning from duplexer 300 is input to the port 2 of circulator 203, from port 3 outputs, after damping resistance 204 carries out the power adjustment, form reverse electromagnetic signal and be sent to reverse detecting circuit 602 and be used for standing wave and detect, so the port one of circulator 203 and port 3 are to isolate mutually;
Damping resistance 204, after level is associated in the port 3 of circulator 203, forward direction electromagnetic signal according to directional coupler 202 outputs, adjust the reflected electromagnetic signal of duplexer 300 reflections, make that forward direction electromagnetic signal and reflected electromagnetic signal are proportional, reflected electromagnetic signal becomes reverse electromagnetic signal after damping resistance 204 is adjusted, output to reverse detecting circuit 602 and be used for the standing wave detection;
Matched load 205, one ends and directional coupler cascade, other end ground connection is carried out port match.
Forward direction detecting circuit 601 and reverse detecting circuit 602 receive the forward direction electromagnetic signal and the reverse electromagnetic signal of directional coupler 202 and damping resistance 204 outputs respectively, are converted to the standing-wave ratio that voltage signal output is used to detect antenna-feedback system.
Above-mentioned directional coupler 203 adopts the 30dB directional coupler, also can not adopt independent device mode, at PCB (Printed Circuit Board, printed circuit board (PCB)) realizes, for making forward direction electromagnetic signal and reflected electromagnetic signal proportional, accordingly, damping resistance 204 adopts the damping resistance of 30dB.The principle that the resistance of damping resistance 204 is selected is to output to the inverse detection circuit after making the reflected electromagnetic signal adjustment, can adopt the damping resistance of 30dB damping resistance or other resistances.
As from the foregoing, in the utility model, preceding during standing wave detects, reverse coupled circuit " implies " in power amplifier 200, because directional coupler 202 can adopt the existing device of small size, and being power amplifiers 200, circulator 203 itself possesses, so increase extra volume hardly, be particluarly suitable for using in little base station.Simultaneously, because directional coupler 202 and damping resistance 204 are very cheap, the cost that the standing wave that the utility model is realized detects is more much lower than the mode of independently standing wave detecting device and dual directional coupler form realization.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (3)
1, a kind of power amplifier, with standing wave detecting device, duplexer connects, described standing wave detecting device comprises forward direction detecting circuit and reverse detecting circuit, described power amplifier comprises power amplifier at least, directional coupler, circulator, described directional coupler and described power amplifier cascade, the port one of described circulator is connected with described directional coupler, port 2 is connected with described duplexer, it is characterized in that, described power amplifier also comprises damping resistance, described damping resistance is connected with the port 3 of described circulator, receives the electromagnetic signal of port 3 inputs of described circulator, exports reverse electromagnetic signal to described reverse detecting circuit;
Described directional coupler receives the electromagnetic signal of described power amplifier input, and coupling output forward direction electromagnetic signal is to described forward direction detecting circuit.
2, power amplifying device as claimed in claim 1 is characterized in that, described directional coupler is the 30dB directional coupler.
3, power amplifying device as claimed in claim 1 is characterized in that, described damping resistance is the 30dB damping resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200570340U CN2790040Y (en) | 2005-04-08 | 2005-04-08 | Power amplification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200570340U CN2790040Y (en) | 2005-04-08 | 2005-04-08 | Power amplification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2790040Y true CN2790040Y (en) | 2006-06-21 |
Family
ID=36790372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200570340U Expired - Lifetime CN2790040Y (en) | 2005-04-08 | 2005-04-08 | Power amplification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2790040Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597106A (en) * | 2016-11-21 | 2017-04-26 | 电子科技大学 | Standing wave coefficient testing device and method of output port in working state of travelling wave tube |
| CN113419130A (en) * | 2021-07-21 | 2021-09-21 | 中国电子技术标准化研究院 | Discharge current calibration device and calibration method for electrostatic discharge generator |
-
2005
- 2005-04-08 CN CNU2005200570340U patent/CN2790040Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597106A (en) * | 2016-11-21 | 2017-04-26 | 电子科技大学 | Standing wave coefficient testing device and method of output port in working state of travelling wave tube |
| CN106597106B (en) * | 2016-11-21 | 2019-10-01 | 电子科技大学 | Output port standing-wave ratio test device and method under a kind of travelling-wave tubes working condition |
| CN113419130A (en) * | 2021-07-21 | 2021-09-21 | 中国电子技术标准化研究院 | Discharge current calibration device and calibration method for electrostatic discharge generator |
| CN113419130B (en) * | 2021-07-21 | 2023-01-10 | 中国电子技术标准化研究院 | Discharge current calibration device and calibration method for electrostatic discharge generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150408 Granted publication date: 20060621 |