CN203734680U - Voltage standing-wave ratio measuring device for short-wave band - Google Patents
Voltage standing-wave ratio measuring device for short-wave band Download PDFInfo
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- CN203734680U CN203734680U CN201320877970.0U CN201320877970U CN203734680U CN 203734680 U CN203734680 U CN 203734680U CN 201320877970 U CN201320877970 U CN 201320877970U CN 203734680 U CN203734680 U CN 203734680U
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- 238000005259 measurement Methods 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 10
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- 238000012544 monitoring process Methods 0.000 abstract description 3
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Abstract
The utility model discloses a voltage standing-wave ratio measuring device for a short-wave band, which comprises the components of: a directional coupler, a processor, a display module, a first short-wave signal processing unit and a second short-wave signal processing unit. The first short-wave signal processing unit comprises a first attenuator, a first wave detector and a first analog-to-digital converter which are successively connected. The second short-wave signal processing unit comprises a second attenuator, a second wave detector and a second analog-to-digital converter which are successively connected. The directional coupler is provided with a forward power coupling output end and a reflected power coupling output end. The forward power coupling output end is connected with the input end of the first attenuator. The reflected power coupling output end is connected with the input end of the second attenuator. The output end of the first analog-to-digital converter and the output end of the second analog-to-digital converter are respectively connected with the processor. The processor is connected with the display module. The voltage standing-wave ratio measuring device provided by the utility model has improved measuring precision and can realize real-time monitoring for power transmission quality of short-wave transmitting signals.
Description
Technical field
The utility model relates to a kind of voltage standing wave ratio measurement mechanism for short-wave band, belongs to mobile communication technology field.
Background technology
Short wave communication is special because of its propagation medium, makes it have irreplaceable status at aspects such as military affairs, emergency communications.For making short-wave transmitter transmitting power maximum delivery in whole frequency range, must between transmitter and feeder, increase impedance matching circuit.Because full wave short-wave radio set frequency coverage coefficient is high, this has increased the difficulty of design greatly.
Voltage standing wave ratio (VSWR) is to weigh an important indicator of radio signal transmission quality, and it represents the voltage peak of standing wave and the ratio of voltage valley.
Good VSWR index expression transmitter and antenna match are good, and transmitting power can effectively be transported to antenna.Bad VSWR even may be due to the excessive transmitter that damages of reflection power.Therefore at the output of transmitter, the measurement of VSWR is absolutely necessary.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of voltage standing wave ratio measurement mechanism for short-wave band is provided, and the certainty of measurement that it has improved device, can realize the real-time monitoring to shortwave transmit signal power transmission quality.
In order to solve the problems of the technologies described above, technical solution adopted in the utility model is: a kind of voltage standing wave ratio measurement mechanism for short-wave band, it comprises directional coupler, processor, display module, the first short-wave signal processing unit and the second short-wave signal processing unit, the first short-wave signal processing unit comprises the first attenuator connecting successively, first detector and the first analog to digital converter, the second short-wave signal processing unit comprises the second attenuator connecting successively, second detector and the second analog to digital converter, described directional coupler has forward power coupling output and reflection power coupling output, forward power coupling output is connected with the input of the first attenuator, reflection power coupling output is connected with the input of the second attenuator, the output of the output of the first analog to digital converter and the second analog to digital converter is all connected with processor, processor is connected with display module.
Further, described directional coupler is dual directional coupler.
Further, described attenuator is T-shaped structure fixed gain attenuator.
Further, described processor is single-chip microcomputer.
Adopt after technique scheme, the utlity model has following beneficial effect:
1, the circuit of wave detector used is compared former diode detection circuit, has improved measurement dynamic range and the certainty of measurement of whole device, and has simplified the difficulty that circuit design, reduction are debugged.
2, after processor, be connected to a display module, like this can detect fructufy time show, convenient monitoring in real time.
3, two fixed gain attenuation module between wave detector and directional coupler, have been added, improve the high-power measurement capability of whole device, according to specific needs, change flexibly attenuation, can make this device be applicable to the measurement of hectowatt to multikilowatt transmitter voltage standing-wave ratio.
4, processor is single-chip microcomputer, has reduced the power consumption of whole device.
Brief description of the drawings
Fig. 1 is the structural representation of the voltage standing wave ratio measurement mechanism for short-wave band of the present utility model;
Fig. 2 is the electrical schematic diagram of directional coupler of the present utility model;
Fig. 3 is the electrical schematic diagram of attenuator of the present utility model and wave detector.
Embodiment
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below.
As shown in Fig. 1 ~ Fig. 3, a kind of voltage standing wave ratio measurement mechanism for short-wave band, it comprises directional coupler, processor, display module, the first short-wave signal processing unit and the second short-wave signal processing unit, the first short-wave signal processing unit comprises the first attenuator connecting successively, first detector and the first analog to digital converter, the second short-wave signal processing unit comprises the second attenuator connecting successively, second detector and the second analog to digital converter, described directional coupler has forward power coupling output and reflection power coupling output, forward power coupling output is connected with the input of the first attenuator, reflection power coupling output is connected with the input of the second attenuator, the output of the output of the first analog to digital converter and the second analog to digital converter is all connected with processor, processor is connected with display module.
Directional coupler is dual directional coupler.
Attenuator is T-shaped structure fixed gain attenuator, and it can change attenuation flexibly to be applicable to the measurement needs of wide region different capacity grade transmitter voltage standing-wave ratio.
Processor is single-chip microcomputer, adopts MSP430F1XX series ultra low-power microcontroller to reduce the power consumption of whole device.
By transmitter to effective through-put power of antenna be
, due to not mating of circuit, the antenna causing to the reflection power of transmitter is
.According to the definition of voltage standing wave ratio, can derive
(1)
Forward power and reverse transfer power are coupled in proportion two outputs by directional coupler, supposes that coupling coefficient is
, directional coupler output obtains respectively forward power
with reverse transfer power
, wave detector is that the power transfer of input short-wave signal is become to direct voltage output, due to the error of wave detector self device, its output DC level can have following formula to represent
The output of forward power wave detector
The output of reverse transfer power detector
Processor obtained after entering to process
Forward power wave detector output after processing
Reverse transfer power detector output after processing
Therefore, can calculate voltage standing wave ratio
By above formula, can find out, as long as measure
with
, just can calculate voltage standing wave ratio, finally by display module by measure fructufy time show.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (4)
1. the voltage standing wave ratio measurement mechanism for short-wave band, it is characterized in that: it comprises directional coupler, processor, display module, the first short-wave signal processing unit and the second short-wave signal processing unit, the first short-wave signal processing unit comprises the first attenuator connecting successively, first detector and the first analog to digital converter, the second short-wave signal processing unit comprises the second attenuator connecting successively, second detector and the second analog to digital converter, described directional coupler has forward power coupling output and reflection power coupling output, forward power coupling output is connected with the input of the first attenuator, reflection power coupling output is connected with the input of the second attenuator, the output of the output of the first analog to digital converter and the second analog to digital converter is all connected with processor, processor is connected with display module.
2. the voltage standing wave ratio measurement mechanism for short-wave band according to claim 1, is characterized in that: described directional coupler is dual directional coupler.
3. the voltage standing wave ratio measurement mechanism for short-wave band according to claim 1, is characterized in that: described attenuator is T-shaped structure fixed gain attenuator.
4. the voltage standing wave ratio measurement mechanism for short-wave band according to claim 1, is characterized in that: described processor is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320877970.0U CN203734680U (en) | 2013-12-27 | 2013-12-27 | Voltage standing-wave ratio measuring device for short-wave band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320877970.0U CN203734680U (en) | 2013-12-27 | 2013-12-27 | Voltage standing-wave ratio measuring device for short-wave band |
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| Publication Number | Publication Date |
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| CN203734680U true CN203734680U (en) | 2014-07-23 |
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| CN201320877970.0U Expired - Lifetime CN203734680U (en) | 2013-12-27 | 2013-12-27 | Voltage standing-wave ratio measuring device for short-wave band |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155511A (en) * | 2014-08-14 | 2014-11-19 | 重庆微标科技有限公司 | Acquisition circuit and power monitoring circuit based on standing wave detection |
| CN104535806A (en) * | 2014-10-31 | 2015-04-22 | 国家电网公司 | Automatic switching device and system of power amplifiers |
| CN106324352A (en) * | 2015-06-18 | 2017-01-11 | 国家新闻出版广电总局无线电台管理局 | Standing-wave ratio detection circuit of multi-frequency medium wave transmitter |
| CN110794205A (en) * | 2019-11-14 | 2020-02-14 | 中电科仪器仪表有限公司 | Through type power measuring device based on USB interface |
| CN115588281A (en) * | 2022-09-19 | 2023-01-10 | 小唐科技(上海)股份有限公司 | VSWR's warning circuit is listened to adjustable |
-
2013
- 2013-12-27 CN CN201320877970.0U patent/CN203734680U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155511A (en) * | 2014-08-14 | 2014-11-19 | 重庆微标科技有限公司 | Acquisition circuit and power monitoring circuit based on standing wave detection |
| CN104535806A (en) * | 2014-10-31 | 2015-04-22 | 国家电网公司 | Automatic switching device and system of power amplifiers |
| CN106324352A (en) * | 2015-06-18 | 2017-01-11 | 国家新闻出版广电总局无线电台管理局 | Standing-wave ratio detection circuit of multi-frequency medium wave transmitter |
| CN106324352B (en) * | 2015-06-18 | 2019-01-22 | 国家新闻出版广电总局无线电台管理局 | The standing-wave ratio detection circuit of multifrequency medium wave transmitter |
| CN110794205A (en) * | 2019-11-14 | 2020-02-14 | 中电科仪器仪表有限公司 | Through type power measuring device based on USB interface |
| CN115588281A (en) * | 2022-09-19 | 2023-01-10 | 小唐科技(上海)股份有限公司 | VSWR's warning circuit is listened to adjustable |
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Granted publication date: 20140723 |
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| CX01 | Expiry of patent term |