CN206004673U - Radio frequency signal power detection circuit - Google Patents
Radio frequency signal power detection circuit Download PDFInfo
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- CN206004673U CN206004673U CN201620883314.5U CN201620883314U CN206004673U CN 206004673 U CN206004673 U CN 206004673U CN 201620883314 U CN201620883314 U CN 201620883314U CN 206004673 U CN206004673 U CN 206004673U
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Abstract
This utility model provides a kind of radio frequency signal power detection circuit, including：First bonder, the input of described first bonder is used for receiving transmission signal；Connect the circulator of described first bonder, the first end of described circulator connects the outfan of described first bonder, and transmission signal is radiate by the second end of described circulator by antenna element；Power detecting unit, the first input end of described power detecting unit connects the coupled end of described first bonder, and the second input of described power detecting unit connects the 3rd end of described circulator；Connect the Base Band Unit of described power detecting unit, for obtaining the detection signal of described power detecting unit output.This utility model radio frequency signal power detection circuit structure is simple, and the isolation of reflection is good, and internal circuit is played a protective role.
Description
Technical field
This utility model is related to technical field of RFID, more particularly, to a kind of radio frequency signal power detection circuit.
Background technology
Super high frequency radio frequency technology of identification is a kind of remote non contact angle measurement technology, and radio-frequency identification reader/writer passes through transmitting-receiving
Radiofrequency signal is written and read to remote radio frequency recognizing electronic label, is widely used in the fields such as Internet of Things, especially in intelligence
Energy field of traffic, plays very big effect to vehicle management etc..Excellent Yu the internal realization electricity of radio-frequency identification reader/writer performance
Road and work process are relevant, and accurately detect the parameter realizing in circuit, the such as radiofrequency signal such as transmission signal, antenna echo
Power, can be risen to the identification sensitivity of raising radio-frequency identification reader/writer, stability with the work process of dynamic optimization internal circuit
Arrive very big effect.Meanwhile, lack the power-sensing circuit of protection, also can be easily received the impact of antenna-reflected etc., make
The bulk life time of radio-frequency identification reader/writer is affected.
Utility model content
The purpose of this utility model is to provide a kind of radio frequency signal power detection circuit, solves radio frequency in prior art
Signal power detection implementation is complicated, the technical problem of sensitive for damages.
In order to solve above-mentioned technical problem, a kind of radio frequency signal power detection circuit of the present utility model, including：
First bonder, the input of described first bonder is used for receiving transmission signal；
Connect the circulator of described first bonder, the first end of described circulator connects the output of described first bonder
End, transmission signal is radiate by the second end of described circulator by antenna element；
Power detecting unit, the first input end of described power detecting unit connects the coupled end of described first bonder,
Second input of described power detecting unit connects the 3rd end of described circulator；
Connect the Base Band Unit of described power detecting unit, for obtaining the detection letter of described power detecting unit output
Number.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described power detecting unit is
Dual input logarithmic detector.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described first bonder includes
The first quarter-wave microstrip line being parallel to each other and the second quarter-wave microstrip line, described first quarter-wave
One end of microstrip line is used for receiving transmission signal, and the other end of described first quarter-wave microstrip line connects described circulator
First end, one end of described second quarter-wave microstrip line connects the first input end of described power detecting unit.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described circulator and described work(
Second bonder is set between rate detector unit, and the input of described second bonder connects the 3rd end of described circulator, institute
The outfan stating the second bonder is connected with load, and the coupled end of described second bonder connects the of described power detecting unit
Two inputs.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described second bonder includes
Microstrip line, one end of described microstrip line connects the 3rd end of described circulator, and the other end of described microstrip line connects described load,
It is arranged in parallel the second input that coupling resistance connects described power detecting unit on the microstrip line.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described Base Band Unit includes locating
Reason device and the analog-digital converter connecting described processor, described processor obtains the work(of radiofrequency signal by described analog-digital converter
Rate value.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described antenna element includes sky
Line and the front network connecting described antenna, described antenna introduces the transmitting letter of described circulator output by described front network
Number.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described front network include every
From the 3rd bonder of forward link and reverse link, described 3rd bonder is integrated chip.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described 3rd bonder is fixed
To bonder.
As the improvement further of the above-mentioned radio frequency signal power detection circuit of this utility model, described front network includes sky
Line options switch circuit, for being switched to the antenna specified.
Compared with prior art, bonder is coordinated by this utility model with circulator, by power detection list
The power of unit's detection radiofrequency signal, not only can detect transmission signal power but also can detect antenna echo power, simultaneously transmitting letter
Number and antenna echo will not influence each other.This utility model radio frequency signal power detection circuit structure is simple, reflection interference every
Good from property, internal circuit is played a protective role.
After the detailed description of this utility model embodiment is read in conjunction with the accompanying, other features of the present utility model and advantage
Will become clearer from.
Brief description
In order to be illustrated more clearly that the technical scheme of this utility model embodiment or prior art, below will be to embodiment party
In formula or description of the prior art the accompanying drawing of required use be briefly described it is therefore apparent that drawings in the following description only
It is some embodiments described in this utility model, for those of ordinary skill in the art, do not paying creative labor
On the premise of dynamic, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is RF identification forward link schematic diagram in this utility model one embodiment.
Fig. 2 is radio frequency signal power detection circuit schematic diagram in this utility model one embodiment.
Specific embodiment
Below with reference to each embodiment shown in the drawings, this utility model is described in detail.But these embodiments
It is not intended to limit this utility model, structure, method or work(that those of ordinary skill in the art is made according to these embodiments
Conversion on energy is all contained in protection domain of the present utility model.
It should be noted that in various embodiments, identical label or labelling may be used, but these not generations
Absolute contact relation in table structure or function.And, " first ", " second ", " the 3rd " being previously mentioned in each embodiment
Not representative structure or absolute differentiation relation functionally, these are merely for convenience of description.
As shown in figure 1, RF identification forward link schematic diagram in this utility model one embodiment.RF identification forward chaining
Road include Base Band Unit 10, quadrature modulator 20, adjustable attenuator 30, power amplifier unit 40, bonder 50, logarithmic detector 60,
Circulator 70, antenna element 80.Antenna element 80 is used for transceiving radio frequency signal, and antenna element 80 is from forward direction link definition standard
Different it is also possible to not included in the module in RF identification forward link, belonging to outside RF identification forward link.Specifically
Ground, antenna element 80 includes front network 81 and antenna 82, and front network 81 is used for as antenna 82 and RF identification forward link
Between provide path, antenna 82 by front network 81 introduce forward link radiofrequency signal.Front network 81 can include using
In the device of transceiver insulation, including the device etc. of sky line options.Antenna 82 is a kind of changer, and it is led transmission above-the-line promotion
Traveling wave, is transformed in unbounded medium（Typically free space）The electromagnetic wave of middle propagation, or carry out contrary conversion, antenna 82
It is the device for direct transceiving radio frequency signal.Base Band Unit 10 is used for controlling radiofrequency signal or Acquisition Circuit parameter, base band list
Control circuit can be included, the control signal specified by control circuit output inside unit 10.
Quadrature modulator 20, in the present embodiment, the framework using directly modulation to be realized, and quadrature modulator 20 connects
Base Band Unit 10, provides I road modulated signal, Q road modulated signal, quadrature modulator 20 from Base Band Unit 10 to quadrature modulator 20
Also receive local oscillation signal it is preferable that quadrature modulator 20 connects the phase-locked loop frequency integrator of inside, by internal phaselocked loop
Frequency synthesizer provides local oscillation signal.Reception I road modulated signal and Q road modulated signal are loaded onto carrier wave by quadrature modulator 20,
Orthogonal modulation is carried out according to local oscillation signal to modulated signal, quadrature modulator 20 is penetrated from outfan output after orthogonal modulation
Frequency signal, that is, need the radiofrequency signal radiateing by antenna element 80.Because entering to radio frequency recognizing electronic label at a distance
Row identification, so having certain requirement to the transmission power of radiofrequency signal, so also need to by other circuit to radiofrequency signal
Processed.In the present embodiment, the I road modulated signal of Base Band Unit 10 offer, Q road modulated signal are as modulated signal package
Information containing data communication, also comprises to adjust the amplitude power of modulating wave.By adjusting I road modulated signal, Q road modulation letter
Number can realize the fine tuning of modulating wave output.
Adjustable attenuator 30 connects quadrature modulator 20 to receive the radiofrequency signal of quadrature modulator 20 output, is also connected with base
The control signal that tape cell 10 is adjusted with receiving attenuation amount.Adjustable attenuator 30 is according to the control signal of Base Band Unit 10 to radio frequency
Signal carries out power adjustment.Preferably, adjustable attenuator 30 is digital adjustable attenuator, you can include some sections in controlled attenuator
Attenuation module, attenuation module has different pad values according to actual, has several on-off circuits between attenuation module, by switch
Circuit close the size to realize differential declines amount for the combination in any turning in several attenuation module, the closing of on-off circuit
By receiving control signal execution.Therefore, control signal is provided to realize to defeated by Base Band Unit 10 to adjustable attenuator 30
Go out the adjustment of power.Adjustable attenuator can be specifically 6 digit control adjustable step attenuators, the minimum control of adjustable attenuator
Not only up to 0.5dB, the accurate step by step modulating of achievable output, radiofrequency signal can achieve amplitude range through adjustable attenuator
The change of about 31.5dB.
The power amplifier unit 40 connecting adjustable attenuator 30 is used for amplifying the power of radiofrequency signal it is preferable that power amplifier unit 40
Including driving amplifier 41 and power amplifier 43, power amplifier 43 connects driving amplifier 41 and amplifies as the second level, drives
Dynamic amplifier 41 inputs to power amplifier 43 after then amplifying signal, finally forms high-power output letter through power amplifier 43
Number launch eventually through bonder 50, antenna element 80 etc..Driving amplifier 41, i.e. driving stage amplifier, by itself
Gain is so that overall power can export enough power with driving power amplifier 43.Power amplifier 43 is final amplifier,
Provide the peak power output of the required configuration of radio-frequency identification reader/writer.In RF identification forward link in present embodiment,
Form the linear circuit of HDR by adjustable attenuator 30 and driving amplifier 41, additionally, power amplifier 43 also fills
Divide and make use of this design of Reducing Rating it can be ensured that forward link has the sufficiently high linearity, prevent the radiofrequency signal launched non-
Linear zone produces the phenomenon such as deformation or intermodulation.
In addition, radio-frequency identification reader/writer is typically all to arrange out of doors, the change of external environment condition is easy to affect radio frequency knowledge
The radiofrequency signal of forward link in other read write line, and radio-frequency identification reader/writer is after starting up, and internal temperature also can be sent out
The very big change of life, often this impact can cause the change of output very big.In a preferred embodiment, in order to eliminate
This impact, arranges temperature compensation attenuator 42, the decay of temperature compensation attenuator 42 between driving amplifier 41 and power amplifier 43
Value linear with temperature change, can under temperature variations effective correcting circuit entire gain.Specifically, work as temperature
When degree rises, the decay of amplifying device gain reduction and temperature compensation attenuator also diminishes；Conversely, upon a drop in temperature, amplifying device
The decay of gain increase and temperature compensation attenuator also becomes big therewith.Environmental characteristics using temperature compensation attenuator can effectively reduce environment
The impact to the output of RF identification forward link in radio-frequency identification reader/writer for the temperature is so that output is maintained at one
Relatively steady state.
Bonder 50 is mainly used in coupling the radiofrequency signal that riches all the way penetrates as power detection.The input of bonder 50 is even
Connect power amplifier unit 40, radiofrequency signal is radiate by the outfan of bonder 50 by antenna element 80, the coupling of bonder 50
End connects logarithmic detector 60, and logarithmic detector 60 passes through coupling and obtains radiofrequency signal.In order to cost-effective, bonder 50 is preferred
Ground is strip line coupler, including two quarter-wave microstrip lines, the first quarter-wave being respectively parallel to each other
Microstrip line and the second quarter-wave microstrip line, one end of the first quarter-wave microstrip line connects power amplifier as input
Unit 40, the other end of the first quarter-wave microstrip line connects antenna element 80 as outfan, in more embodiment party
In formula, between the other end of antenna element 80 and the first quarter-wave microstrip line, it is connected with circulator 70, below will be in detail
State, that is, radiofrequency signal is radiate by the other end of the first quarter-wave microstrip line by antenna element 80.Two or four point
One of wave microstrip line one end as coupled end connect logarithmic detector 60, to logarithmic detector 60 provide radiofrequency signal.Need
It is noted that the embodiment of bonder 50 not with above-mentioned be described as limit however not excluded that can use directional coupler etc. its
He replaces power coupling circuit.
Logarithmic detector 60, is the preferred implementation of power detecting unit, and the radiofrequency signal that will be coupled into switchs to voltage
Parameter, carries out magnitude demodulator to radiofrequency signal, and the amplitude information of radiofrequency signal is linearly changed into voltage signal.Logarithm is examined
First outfan of ripple device 60 connects Base Band Unit 10, and the first outfan of logarithmic detector 60 exports first input end input
The voltage signal that radiofrequency signal is converted into obtains transmission power level, base to Base Band Unit 10, Base Band Unit 10 by voltage signal
Tape cell 10 adjusts quadrature modulator 20 and adjustable attenuator 30 according to transmission power level, i.e. control letter after output adjustment
Number give quadrature modulator 20 and adjustable attenuator 30.For example, transmission power level is not up to designated value, just increases quadrature modulator 20
Output or reduce adjustable attenuator 30 decay.
In the present embodiment, Base Band Unit 10 includes processor 11 and analog-digital converter 13（ADC, Analog-to-
Digital Converter）, the input of analog-digital converter 13 receives the voltage signal of logarithmic detector 60 output, by interior
Portion processes and is converted into digital signal, connects processor 11 from the outfan of analog-digital converter 13 and provides it transmission power level.Place
Reason device 11 passes through to connect digital to analog converter 12（DAC, Digital-to-Analog Converter）Input output control letter
Number, the outfan of digital to analog converter 12 connects quadrature modulator 20, the digital command that processor 11 is generated by digital to analog converter 12
Be converted to modulated signal, that is, the digital signal of digital to analog converter 12 receiving processor 11 and be converted into corresponding I road modulated signal,
Q road modulated signal.
In a preferred embodiment, it is additionally provided with circulator 70, circulator 70 between bonder 50 and antenna element 80
First end 71 connect the outfan of bonder 50, second end 72 of circulator 70 connects antenna element 80, the of circulator 70
Three end 73 connects the second input of logarithmic detector 60, and in the present embodiment, logarithmic detector 60 is dual input logarithm
Cymoscope.The acting as of circulator 70 can protect power amplifier not breakdown under antenna element 80 no-load condition, in addition
The echo-signal that antenna 82 can also be extracted is used for the detection of antenna condition.Preferably, the 3rd end 73 of circulator 70 with right
It is provided with bonder 91, for preventing logarithmic detector 60 from being crossed high energy by what antenna element 80 reflected between number cymoscope 60
Amount is damaged.Specifically, the input of bonder 91 connects the 3rd end 73 of circulator 70, and the outfan of bonder 91 is connected with negative
Carry 92, the coupled end of bonder 91 connects the second input of logarithmic detector 60.Bonder 90 specifically can include micro-strip
Line, one end of microstrip line connects the 3rd end 73 of circulator 70, and the other end of microstrip line connects load 92, in parallel on the microstrip line
It is provided with the second input that coupling resistance connects logarithmic detector 60.It should be noted that the embodiment of bonder 91 is simultaneously
It is not described as limiting however not excluded that other power such as the embodiment of directional coupler or above-mentioned parallel microstrip line can be used with above-mentioned
Termination power replaces.
Because three port direction characteristics of circulator 70 itself, when the first end 71 of circulator 70 is input, the
Two ends 72 are outfan, and the 3rd end 73 is isolation end, and the signal of the outfan output of bonder 50 is from the first end of circulator 70
71 the second ends 72 flowing to circulator 70, are transmitted further to antenna element 80, without being received by logarithmic detector 60.Work as annular
When second end 72 of device 70 is input, the 3rd end 73 of circulator 70 is outfan, and the first end 71 of circulator 70 is isolation
End, the therefore echo-signal of antenna 82 flow to the 3rd end 73 of circulator 70 by the second end 72 of circulator 70, will not transmit
To power amplifier 43, also the signal reflecting will be led to burn out power amplifier 43 because of zero load.The setting of circulator 70
Put the reflection that can reduce high-power signal under no-load condition, be prevented effectively from hitting of may leading under power amplifier mismatch Conditions
Wear phenomenon so that the safety of circuit and reliability greatly promote.
As described above, antenna echo power can also be detected by the cooperation with circulator 70.Antenna 82 return
Ripple signal can export to logarithmic detector 60 by the 3rd end 73 of circulator 70, and logarithmic detector 60 is by the echo of antenna 82
The amplitude information of signal is linearly changed into voltage signal and is conveyed to processor 11 after being supplied to analog-digital converter 13 sampling, place
Reason device 11 can calculate the echo of antenna by the data receiving.
As shown in Fig. 2 radio frequency signal power detection circuit schematic diagram in this utility model one embodiment.Radiofrequency signal work(
Rate testing circuit includes Base Band Unit 10, bonder 50, circulator 70, power detecting unit 60.The input of bonder 50 is even
Connect forward link 100 to receive transmission signal, the outfan of bonder 50 connects the first end of circulator 70, the coupling of bonder 50
Close the first input end that end connects power detecting unit 60.Bonder 50 preferably includes the first quarter-wave being parallel to each other
Long microstrip line and the second quarter-wave microstrip line, one end of described first quarter-wave microstrip line is used for receiving transmitting
Signal, the other end of described first quarter-wave microstrip line connects the first end of circulator 70, described second a quarter
One end of wave microstrip line connects the first input end of power detecting unit 60.
Transmission signal is radiate by the second end of circulator 70 by antenna element, the three-terminal link work(of circulator 70
Second input of rate detector unit 60.Due to the self-characteristic of circulator 70, during the first end input signal of circulator 70, ring
Second end of shape device 70 is outfan, and the 3rd end of circulator 70 is isolation end.During the second end input signal of circulator 70, ring
3rd end of shape device 70 is outfan, and the first end of circulator 70 is isolation end.
Power detecting unit is preferably dual input logarithmic detector, carries out magnitude demodulator to radiofrequency signal, by radio frequency
The amplitude information of signal is linearly changed into voltage signal, can detect transmission signal power and antenna echo watt level simultaneously.
Base Band Unit 10 connects power detecting unit 60, obtains the detectable voltage signals of power detecting unit 60 output.Preferably, base band
The analog-digital converter that unit 10 includes processor and connects described processor, described processor is obtained by described analog-digital converter
The performance number of radiofrequency signal.In the present embodiment, bonder 91, coupling are set between circulator 70 and power detecting unit 60
The input of device 91 connects the 3rd end of circulator 70, and the outfan of bonder 91 is connected with load 92, the coupling of bonder 91
End connects the second input of power detecting unit 60.Bonder 91 can include microstrip line, and one end of described microstrip line connects
3rd end of circulator 70, the other end of described microstrip line connects load 92, has been arranged in parallel coupling resistance on the microstrip line even
Connect the second input of power detecting unit 60.
In the present embodiment, the front network that antenna element includes antenna 82 and connects antenna 82, antenna 82 passes through institute
State the transmission signal that front network introduces the second end output of circulator 70.Front network can include switching network 811 and collection
Become bonder 812, switching network 811 is antenna selection switch circuit, for being switched to the antenna specified.Integrated bonder 812
It is preferably an integrated chip, can be directional coupler, the transmission signal of forward link can be radiate by antenna 82,
The radiofrequency signal that antenna 82 can also be received exports to reverse link 200, and integrated bonder 812 is used for isolating forward link
100 and reverse link 200.By interfering between foregoing circuit transmission signal and antenna echo, due to circulator
Principle, antenna echo, through the second end input of circulator 70, will not enter forward link 100 by bonder 50.Meanwhile, work(
Rate detector unit 60 both can detect the power of transmission signal it is also possible to detect the power of antenna echo.Specific embodiment
Can also be with reference to the specific embodiment of above-mentioned forward link.
In sum, bonder is coordinated by this utility model with circulator, is detected by power detecting unit
The power of radiofrequency signal, not only can detect transmission signal power but also can detect antenna echo power, simultaneously transmission signal and sky
Line echo will not influence each other.This utility model radio frequency signal power detection circuit structure is simple, and the isolation of reflection is good, internally
Portion's circuit plays a protective role.
It should be understood that although this specification is been described by according to embodiment, but not each embodiment only comprises one
Individual independent technical scheme, only for clarity, those skilled in the art should will say this narrating mode of description
As an entirety, the technical scheme in each embodiment can also be through appropriately combined, and forming those skilled in the art can for bright book
With the other embodiment understanding.
The a series of detailed description of those listed above is only for the tool of feasibility embodiment of the present utility model
Body illustrates, they are simultaneously not used to limit protection domain of the present utility model, all is made without departing from this utility model skill spirit
Equivalent implementations or change should be included within protection domain of the present utility model.
Claims (10)
1. a kind of radio frequency signal power detection circuit is it is characterised in that include:
First bonder, the input of described first bonder is used for receiving transmission signal；
Connect the circulator of described first bonder, the first end of described circulator connects the outfan of described first bonder,
Transmission signal is radiate by the second end of described circulator by antenna element；
Power detecting unit, the first input end of described power detecting unit connects the coupled end of described first bonder, described
Second input of power detecting unit connects the 3rd end of described circulator；
Connect the Base Band Unit of described power detecting unit, for obtaining the detection signal of described power detecting unit output.
2. radio frequency signal power detection circuit according to claim 1 is it is characterised in that described power detecting unit is double
Road inputs logarithmic detector.
3. radio frequency signal power detection circuit according to claim 1 is it is characterised in that described first bonder includes phase
Mutually the first parallel quarter-wave microstrip line and the second quarter-wave microstrip line, described first quarter-wave is micro-
One end of band wire is used for receiving transmission signal, and the other end of described first quarter-wave microstrip line connects described circulator
First end, one end of described second quarter-wave microstrip line connects the first input end of described power detecting unit.
4. radio frequency signal power detection circuit according to claim 1 is it is characterised in that described circulator and described power
Second bonder is set between detector unit, and the input of described second bonder connects the 3rd end of described circulator, described
The outfan of the second bonder is connected with load, and the coupled end of described second bonder connects the second of described power detecting unit
Input.
5. radio frequency signal power detection circuit according to claim 4 it is characterised in that described second bonder include micro-
Band wire, one end of described microstrip line connects the 3rd end of described circulator, and the other end of described microstrip line connects described load,
The second input that coupling resistance connects described power detecting unit is arranged in parallel on microstrip line.
6. radio frequency signal power detection circuit according to claim 1 is it is characterised in that described Base Band Unit includes processing
Device and the analog-digital converter connecting described processor, described processor obtains the power of radiofrequency signal by described analog-digital converter
Value.
7. radio frequency signal power detection circuit according to claim 1 is it is characterised in that described antenna element includes antenna
And the front network of the described antenna of connection, described antenna is by the transmitting letter of described front network introducing described circulator output
Number.
8. radio frequency signal power detection circuit according to claim 7 is it is characterised in that described front network includes isolating
Forward link and the 3rd bonder of reverse link, described 3rd bonder is integrated chip.
9. radio frequency signal power detection circuit according to claim 8 is it is characterised in that described 3rd bonder is orientation
Bonder.
10. radio frequency signal power detection circuit according to claim 7 is it is characterised in that described front network includes sky
Line options switch circuit, for being switched to the antenna specified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620883314.5U CN206004673U (en) | 2016-08-16 | 2016-08-16 | Radio frequency signal power detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620883314.5U CN206004673U (en) | 2016-08-16 | 2016-08-16 | Radio frequency signal power detection circuit |
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| Publication Number | Publication Date |
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| CN206004673U true CN206004673U (en) | 2017-03-08 |
Family
ID=58199926
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| CN201620883314.5U Active CN206004673U (en) | 2016-08-16 | 2016-08-16 | Radio frequency signal power detection circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449981A (en) * | 2017-07-24 | 2017-12-08 | 武汉虹信通信技术有限责任公司 | The simple multiple signals coupling detection means and method of power of mobile communication amplifier |
| CN109194413A (en) * | 2018-08-28 | 2019-01-11 | 北京遥感设备研究所 | A kind of two-band four-way answering machine microwave link test device |
| CN109343010A (en) * | 2018-08-22 | 2019-02-15 | 北京遥感设备研究所 | One kind of multiple class answering machine microwave link test devices |
| CN109412617A (en) * | 2018-11-19 | 2019-03-01 | 成都康特电子高新科技有限责任公司 | Rf broadband multiplying arrangement and rf gain regulate and control method |
| CN110492951A (en) * | 2019-08-02 | 2019-11-22 | Oppo（重庆）智能科技有限公司 | A kind of RF FEEDBACK detection circuit, antenna module and electronic equipment |
| CN112327081A (en) * | 2020-10-30 | 2021-02-05 | 中国科学院高能物理研究所 | Power testing device and method for rectangular waveguide directional coupler |
| CN114221723A (en) * | 2021-11-10 | 2022-03-22 | 苏州畅恒通信科技有限公司 | Full-channel power detection circuit structure for self-adaptive channel selection |
-
2016
- 2016-08-16 CN CN201620883314.5U patent/CN206004673U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449981A (en) * | 2017-07-24 | 2017-12-08 | 武汉虹信通信技术有限责任公司 | The simple multiple signals coupling detection means and method of power of mobile communication amplifier |
| CN109343010A (en) * | 2018-08-22 | 2019-02-15 | 北京遥感设备研究所 | One kind of multiple class answering machine microwave link test devices |
| CN109194413A (en) * | 2018-08-28 | 2019-01-11 | 北京遥感设备研究所 | A kind of two-band four-way answering machine microwave link test device |
| CN109412617A (en) * | 2018-11-19 | 2019-03-01 | 成都康特电子高新科技有限责任公司 | Rf broadband multiplying arrangement and rf gain regulate and control method |
| CN110492951A (en) * | 2019-08-02 | 2019-11-22 | Oppo（重庆）智能科技有限公司 | A kind of RF FEEDBACK detection circuit, antenna module and electronic equipment |
| CN110492951B (en) * | 2019-08-02 | 2021-11-09 | Oppo（重庆）智能科技有限公司 | Radio frequency feedback detection circuit, antenna assembly and electronic equipment |
| CN112327081A (en) * | 2020-10-30 | 2021-02-05 | 中国科学院高能物理研究所 | Power testing device and method for rectangular waveguide directional coupler |
| CN112327081B (en) * | 2020-10-30 | 2021-06-22 | 中国科学院高能物理研究所 | Power testing device and method for rectangular waveguide directional coupler |
| CN114221723A (en) * | 2021-11-10 | 2022-03-22 | 苏州畅恒通信科技有限公司 | Full-channel power detection circuit structure for self-adaptive channel selection |
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