CN202503525U - Power amplifier module output standing wave detection and protection structure - Google Patents
Power amplifier module output standing wave detection and protection structure Download PDFInfo
- Publication number
- CN202503525U CN202503525U CN2012201064045U CN201220106404U CN202503525U CN 202503525 U CN202503525 U CN 202503525U CN 2012201064045 U CN2012201064045 U CN 2012201064045U CN 201220106404 U CN201220106404 U CN 201220106404U CN 202503525 U CN202503525 U CN 202503525U
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- power amplifier
- digital converter
- amplifier
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Abstract
The utility model relates to a power amplifier module output standing wave detection and protection structure. The structure comprises an amplifier for receiving radio-frequency signals, and a directional coupler communicating with the amplifier and a load piece communicating with the directional coupler. The structure is characterized in that: the structure further comprises a circulator which is arranged between the directional coupler and the load piece, a first analog-to-digital converter which communicates with the directional coupler, a second analog-to-digital converter which communicates with the circulator, and a microprocessor which communicates with the first analog-to-digital converter and the second analog-to-digital converter; and the microprocessor also communicates with the amplifier. According to the structure of the utility model, by means of a standing wave detection on a power amplifier module output port, construction personnel can read a standing wave value as plain as daylight; and a device can be debugged according to an impedance matching condition between the power amplifier and an antenna. As a result, accurate judgment can be realized, and working efficiency can be improved.
Description
Technical field
The utility model relates to a kind of detection and protection structure of exporting standing wave, especially relates to a kind of Mobile communication direct base station radio frequency amplifier output standing wave and detects and the protection structure, belongs to communication technical field.
Background technology
Since the communication industry development; Whether the power amplifier delivery outlet is the big problem that can not be ignored with mating being connected of load elements (like antenna) always; The output size that directly has influence on signal is the coverage of signal just; Even can puncture the final stage amplifier tube because of signal reflex is excessive, cause no signal output.
When project installation and commissioning equipment; Factor because of subjective conditions such as environment instrument; The workmen is difficult to judge the match condition between power amplifier delivery outlet and the antenna; Whether Installation and Debugging are proper can't to confirm equipment, if impedance can not be satisfied certain coupling, the time has just been grown and might cause the power amplifier module cisco unity malfunction.Therefore the standing wave that detects the power amplifier delivery outlet seems most important, the normal operating position of the equipment that directly has influence on.
Usually in the practical applications, the workmen comes the coverage condition of test signal usually through relevant devices such as testing mobile phones, but has a lot of problems.Because of the place of test signal and the distance dependent of antenna; Add the signal of extraneous other base station equipments; Also have the existence of correlative factors such as weather, cause a series of test error, the test standing wave situation that the workmen finally still can't be definite; Basically to judge according to relevant construction experience for many years, therefore carry out standing wave and detect very necessary at the power amplifier delivery outlet.
The utility model content
For solving the deficiency of prior art, the purpose of the utility model is that the stability that provides a kind of standing wave, protection final stage amplifier tube, raising that can detect the power amplifier delivery outlet to communicate by letter, the power amplifier module output standing wave of guaranteeing speech quality, guarantee signal cover detect and protect structure.
For achieving the above object, the utility model is to realize through following technical scheme:
Power amplifier module output standing wave detects and the protection structure; Comprise the amplifier of received RF signal, the directional coupler that is communicated with amplifier and the load elements that is communicated with directional coupler; It is characterized in that; Also comprise one be arranged on circulator between described directional coupler and the load elements, with described orientation first analog to digital converter, second analog to digital converter that is communicated with described circulator that are communicated with of device and the microprocessor that is communicated with described first analog to digital converter and second analog to digital converter once in a while; Described microprocessor is communicated with amplifier simultaneously, the operating state of microprocessor output control command control amplifier when the over proof scope of standing wave ratio.
Further; Described microprocessor also is connected with one and shows an indicating device and an alarm indicating device; Described demonstration indicating device is used to show current standing wave ratio, and described alarm indicating device is used for outputting alarm indication when the over proof scope of standing wave ratio.
The beneficial effect of the utility model is: the utility model detects through the power amplifier module delivery outlet being carried out standing wave; Make the workmen can open-and-shutly read the standing wave value; And can come commissioning device according to the impedance matching situation between power amplifier and the antenna; Can not only judge accurately, and Installation and Debugging get up convenient and practically, can increase work efficiency.
Description of drawings
Fig. 1 is the structural representation of the utility model one embodiment.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done concrete introduction.
Fig. 1 is the structural representation of the utility model one embodiment.
As shown in Figure 1: power amplifier module output standing wave detects and the protection structure; Comprise the amplifier of received RF signal, the directional coupler that is communicated with amplifier and the load elements that is communicated with directional coupler; Also comprise one be arranged on circulator between described directional coupler and the load elements, with described orientation first analog to digital converter, second analog to digital converter that is communicated with described circulator that are communicated with of device and the microprocessor that is communicated with described first analog to digital converter and second analog to digital converter once in a while; Described microprocessor is communicated with amplifier simultaneously, the operating state of microprocessor output control command control amplifier when the over proof scope of standing wave ratio.In addition; Described microprocessor also is connected with one and shows an indicating device and an alarm indicating device; Described demonstration indicating device is used to show current standing wave ratio, and described alarm indicating device is used for outputting alarm indication when the over proof scope of standing wave ratio.
Radiofrequency signal is input to amplifier (PA) in the utility model; Through outputing to directional coupler (coupler) after (PA) amplification; Directional coupler output radiofrequency signal is given circulator (circulator); Through giving load elements (like antenna etc.) behind the circulator, final load spare radiate radiofrequency signal.The radiofrequency signal of directional coupler pair amplifier output is carried out the forward sampling; With the radiofrequency signal of sampling output flow to first analog to digital converter (D1); First analog to digital converter converts the radiofrequency signal of sampling to direct current signal 1, and gives microprocessor with direct current signal 1; Circulator is oppositely sampled to reflected signal; With the signal of sampling output give second analog to digital converter (D2), second analog-to-digital conversion converts the radiofrequency signal of sampling to direct current signal 2, and direct current signal 2 is sent into microprocessor; Microprocessor is analyzed and is handled two paths of signals; Export three road signals, the one tunnel gets into display indicator shows indication, shows current standing wave ratio; One the tunnel gets into alarm indicator alarms indication, outputting alarm indication when the over proof scope of standing wave ratio; One the tunnel is that control command gets into amplifier, output control command control amplifier operating state when the over proof scope of standing wave ratio, the final purpose that realizes detecting standing wave and guard amplifier.
The utility model with the signal of power amplifier output and since both impedances not exclusively a part of signal of reflecting of coupling keep apart through directional coupler; Make not exist each other between the two paths of signals and crosstalk; Detection signal is also just relatively accurate; And becoming DC level to conversion of signals through analog to digital converter again, the detection magnitude of voltage that reflects when standing wave is different is just different, detects the magnitude of voltage computing to two by operational amplifier again and becomes actual standing wave value.Standing wave will be alarmed when load elements and power amplifier impedance matching surpass certain value, and can turn-off the effect that power amplifier plays guard amplifier this moment, and workmen's Installation and Debugging are got up convenient and practical like this.
Specific embodiment is: the vswr protection of 100W power amplifier
Radiofrequency signal is input to amplifier, amplifies the power of back output 100W through PA, adopts the degree of coupling to carry out the forward sampling for the radiofrequency signal of-30dB directional coupler pair amplifier output; Adopt isolation reflected signal oppositely to be sampled for the circulator of-30dB.
When load elements connects just often, the radiofrequency signal of forward sampling through first analog to digital converter (A) after, convert the direct current signal of 2V magnitude of voltage to, the direct current signal of 2V magnitude of voltage is given microprocessor; Reverse sampling penetrate signal through second analog to digital converter (D2) after; Convert the radiofrequency signal of reverse sampling to the direct current signal of 3V magnitude of voltage; The direct current signal of 3V magnitude of voltage is sent into microprocessor, and microprocessor is analyzed and handled two paths of signals, exports three road signals; One the tunnel shows indication, shows current standing wave ratio 1.5; One tunnel alarm indication, display voltage value 0V, amplifier operate as normal.
When the load elements malunion often; The two-way direct current signal of sampling gets into microprocessor processes and goes out the specified scope (1.0-1.8) that data can exceed the microprocessor setting; Microprocessor is exported three road signals one tunnel and is shown current actual standing wave ratio, the alarm indication of one tunnel output+5V magnitude of voltage; One tunnel control command, the control amplifier operating state is not worked it, the final purpose that realizes detecting standing wave and guard amplifier.
The foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in the protection range of the utility model.
Claims (3)
1. power amplifier module output standing wave detects and the protection structure; Comprise the amplifier of received RF signal, the directional coupler that is communicated with amplifier and the load elements that is communicated with directional coupler; It is characterized in that; Also comprise one be arranged on circulator between described directional coupler and the load elements, with described orientation first analog to digital converter, second analog to digital converter that is communicated with described circulator that are communicated with of device and the microprocessor that is communicated with described first analog to digital converter and second analog to digital converter once in a while, described microprocessor is communicated with amplifier simultaneously.
2. power amplifier module output standing wave according to claim 1 detects and the protection structure, it is characterized in that, described microprocessor also is connected with one and shows indicating device.
3. power amplifier module output standing wave according to claim 1 and 2 detects and the protection structure, it is characterized in that, described microprocessor also is connected with an alarm indicating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201064045U CN202503525U (en) | 2012-03-21 | 2012-03-21 | Power amplifier module output standing wave detection and protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201064045U CN202503525U (en) | 2012-03-21 | 2012-03-21 | Power amplifier module output standing wave detection and protection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202503525U true CN202503525U (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201064045U Expired - Fee Related CN202503525U (en) | 2012-03-21 | 2012-03-21 | Power amplifier module output standing wave detection and protection structure |
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| CN (1) | CN202503525U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995336A (en) * | 2019-03-13 | 2019-07-09 | 波达通信设备（广州）有限公司 | Power amplification control circuit, power amplifier control method, power amplifier and network access equipment |
| CN110446247A (en) * | 2019-07-04 | 2019-11-12 | 维沃移动通信有限公司 | Signal control circuit, method and terminal device |
| CN113809993A (en) * | 2021-11-18 | 2021-12-17 | 成都市卫莱科技有限公司 | Working signal monitoring control device, system and method for power amplifier |
-
2012
- 2012-03-21 CN CN2012201064045U patent/CN202503525U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995336A (en) * | 2019-03-13 | 2019-07-09 | 波达通信设备（广州）有限公司 | Power amplification control circuit, power amplifier control method, power amplifier and network access equipment |
| CN109995336B (en) * | 2019-03-13 | 2023-04-07 | 波达通信设备（广州）有限公司 | Power amplifier control circuit, power amplifier control method, power amplifier circuit and network access equipment |
| CN110446247A (en) * | 2019-07-04 | 2019-11-12 | 维沃移动通信有限公司 | Signal control circuit, method and terminal device |
| CN113809993A (en) * | 2021-11-18 | 2021-12-17 | 成都市卫莱科技有限公司 | Working signal monitoring control device, system and method for power amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20160321 |