CN206364810U - A kind of radio-frequency power test device - Google Patents
A kind of radio-frequency power test device Download PDFInfo
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- CN206364810U CN206364810U CN201720019986.6U CN201720019986U CN206364810U CN 206364810 U CN206364810 U CN 206364810U CN 201720019986 U CN201720019986 U CN 201720019986U CN 206364810 U CN206364810 U CN 206364810U
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- frequency power
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Abstract
The utility model discloses a kind of radio-frequency power test device, including power-sensing circuit, the rf inputs of the power-sensing circuit are connected with diode D1 anode, and diode D1 negative electrode is connected with resistance R3 first end, and resistance R3 is connected with the second end with amplifier U1 in-phase input end；Ground capacity C1 and grounding resistance C2 in parallel is additionally provided between diode D1 negative electrode and resistance R3 first end；Amplifier U1 inverting input is grounded by resistance R5；The output end of the amplifier U1 is connected between amplifier U1 end of oppisite phase and resistance R5 by resistance R4；The output end of the amplifier U1 is also connected by resistance R6 with detection signal output part；Temperature-compensation circuit is additionally provided between the resistance R6 and detection signal output part.The utility model carries out temperature-compensating, it is ensured that the voltage accuracy that detection is obtained, and then ensure the accuracy of device for testing power during detection is carried out to radiofrequency signal by the temperature-compensation circuit between resistance R6 and detection signal output part.
Description
Technical field
The utility model is related to a kind of radio-frequency power test device.
Background technology
Since being set up from 19th-century Maxwell Theory of Electromagnetic Field, radiotechnics has been deep into Human routine activities
Every field.Radiotechnics is widely used in engineering fields such as the energy, traffic, medical treatment and information.Electromagnetic wave
As a kind of energy or the carrier of information, its most basic physical quantity is frequency and power.It is extensive with application, penetrate
The transmit-receive radio road that takes place frequently is more and more important in the application.
In wireless communication field, carry out being required to measure radiofrequency signal during radio-frequency transmissions, it is almost all of
Device of the radio frequency sending set containing measurement radio-frequency power, for now, the mode that rf power measurement device is measured
Be that radiofrequency signal is detected by power-sensing circuit mostly, obtain corresponding level/voltage, detect obtained level/
Voltage is directly proportional to the power of radiofrequency signal；The work(that can obtain radiofrequency signal is handled level/voltage that detection is obtained
Rate.
But in fact, many times, the voltage that power-sensing circuit detection is obtained can be changed with temperature, if without temperature
Degree compensation, then can bring adverse effect to the accuracy of power detection.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided a kind of radio-frequency power test device, passed through
Temperature-compensation circuit between resistance R6 and detection signal output part carries out temperature-compensating, it is ensured that the voltage that detection is obtained is accurate
Property, and then ensure the accuracy of device for testing power.
The purpose of this utility model is achieved through the following technical solutions：A kind of radio-frequency power test device, including
Power-sensing circuit, the rf inputs of the power-sensing circuit are connected with diode D1 anode, diode D1 negative electrode
It is connected with resistance R3 first end, resistance R3 is connected with the second end with amplifier U1 in-phase input end；Diode D1 negative electrode with
The ground capacity C1 and grounding resistance C2 of parallel connection are additionally provided between resistance R3 first end；Amplifier U1 inverting input passes through
Resistance R5 is grounded；The output end of the amplifier U1 is connected between amplifier U1 end of oppisite phase and resistance R5 by resistance R4；It is described
Amplifier U1 output end is also connected by resistance R6 with detection signal output part；Between the resistance R6 and detection signal output part
It is additionally provided with temperature-compensation circuit.
Grounding resistance R1 is also associated between described rf inputs and diode D1 anode.
Described temperature-compensation circuit includes resistance R7 and diode D2；The first end of the resistance R7 is connected to resistance R6
Between detection signal output part, resistance R7 the second end is connected with diode D2 anode, diode D2 minus earth.
Described diode D1 uses HSMS-2850 diodes.
The diode D2 uses HMPS-2822 diodes.
Described radio-frequency power test device also include CPU processor and display, the input of the CPU processor with
The RF output end connection of power-sensing circuit, the output end of CPU processor is connected with display.
Described radio-frequency power test device also includes filter circuit, amplifying circuit and A/D change-over circuits, the power inspection
The RF output end of slowdown monitoring circuit passes sequentially through filter circuit, amplifying circuit and A/D change-over circuits and is connected with CPU processor.
The beneficial effects of the utility model are：（1）Pass through the temperature-compensating electricity between resistance R6 and detection signal output part
Road carries out temperature-compensating, it is ensured that the voltage accuracy that detection is obtained, and then ensures the accuracy of device for testing power.
（2）Resistance R3, R4, R5 and amplifier U1 constitute an in-phase amplifier, small-signal can also be carried out effectively
Detection.
（3）Grounding resistance R1 is also associated between rf inputs and diode D1 anode, can be diode D1 shapes
Into good impedance matching.
（4）Temperature-compensation circuit is made up of resistance R7 and diode D2, and diode D2 junction resistance becomes with temperature, enters
And change the level of detection signal output part output, realize temperature-compensating.
Brief description of the drawings
Fig. 1 is the principle schematic of power-sensing circuit.
Embodiment
The technical solution of the utility model, but protection domain of the present utility model are described in further detail below in conjunction with the accompanying drawings
It is not limited to as described below.
As shown in figure 1, a kind of radio-frequency power test device, including power-sensing circuit, the power-sensing circuit is penetrated
Frequency input terminal RF-in is connected with diode D1 anode, and diode D1 negative electrode is connected with resistance R3 first end, resistance R3 with
Second end is connected with amplifier U1 in-phase input end；It is additionally provided between diode D1 negative electrode and resistance R3 first end in parallel
Ground capacity C1 and grounding resistance C2；Amplifier U1 inverting input is grounded by resistance R5；The output end of the amplifier U1
It is connected to by resistance R4 between amplifier U1 end of oppisite phase and resistance R5；The output end of the amplifier U1 also passes through resistance R6 and inspection
Survey signal output part connection；Temperature-compensation circuit is additionally provided between the resistance R6 and detection signal output part V-out.
Grounding resistance R1 is also associated between described rf inputs and diode D1 anode.
Described temperature-compensation circuit includes resistance R7 and diode D2；The first end of the resistance R7 is connected to resistance R6
Between detection signal output part, resistance R7 the second end is connected with diode D2 anode, diode D2 minus earth.
Described diode D1 uses HSMS-2850 diodes.
The diode D2 uses HMPS-2822 diodes.
Described radio-frequency power test device also include CPU processor and display, the input of the CPU processor with
The RF output end connection of power-sensing circuit, the output end of CPU processor is connected with display.In embodiments herein
In, CPU processor is using the main voltage for being responsible for exporting power-sensing circuit（Level）, be converted to performance number.
Described radio-frequency power test device also includes filter circuit, amplifying circuit and A/D change-over circuits, the power inspection
The RF output end of slowdown monitoring circuit passes sequentially through filter circuit, amplifying circuit and A/D change-over circuits and is connected with CPU processor.
In the course of work, radiofrequency signal to be measured is inputted by RF signal input end RF-in, is realized by grounding resistance R1
The impedance matching of diode, grounding resistance is typically between 1 ~ 3K Ω, diode D1（HSMS-2850）, electric capacity C1（200pF）
With resistance R2（100K）The detection of radiofrequency signal is realized, then by resistance R3（1K）、R4（200k）、R5（10K）With amplifier U1（Amplifier
U1 is realized using LM358）Constitute an in-phase amplifier, then the resistance R6 for passing through output end（10K）Carry out detection signal（Electricity
It is flat）Output；And output end is provided with temperature-compensation circuit, the temperature-compensation circuit is by resistance R（20K）7 and diode D2
Constitute, diode D2（HMPS-2822）Junction resistance become with temperature, and then change detection signal output part output electricity
It is flat, realize temperature-compensating.Signal detection end output level after filtering, amplification and A/D after, feeding CPU in handled, obtain
Shown in the display to performance number.
Claims (7)
1. a kind of radio-frequency power test device, it is characterised in that：Including power-sensing circuit, the radio frequency of the power-sensing circuit
Input is connected with diode D1 anode, and diode D1 negative electrode is connected with resistance R3 first end, resistance R3 and the second end
It is connected with amplifier U1 in-phase input end；Ground connection in parallel is additionally provided between diode D1 negative electrode and resistance R3 first end
Electric capacity C1 and grounding resistance C2；Amplifier U1 inverting input is grounded by resistance R5；The output end of the amplifier U1 passes through electricity
Resistance R4 is connected between amplifier U1 end of oppisite phase and resistance R5；The output end of the amplifier U1 also passes through resistance R6 and detection signal
Output end is connected；Temperature-compensation circuit is additionally provided between the resistance R6 and detection signal output part.
2. a kind of radio-frequency power test device according to claim 1, it is characterised in that：Described rf inputs and two
Grounding resistance R1 is also associated between pole pipe D1 anode.
3. a kind of radio-frequency power test device according to claim 1, it is characterised in that：Described temperature-compensation circuit bag
Include resistance R7 and diode D2；The first end of the resistance R7 is connected between resistance R6 and detection signal output part, resistance R7
The second end be connected with diode D2 anode, diode D2 minus earth.
4. a kind of radio-frequency power test device according to claim 1, it is characterised in that：Described diode D1 is used
HSMS-2850 diodes.
5. a kind of radio-frequency power test device according to claim 3, it is characterised in that：The diode D2 is used
HMPS-2822 diodes.
6. a kind of radio-frequency power test device according to claim 1, it is characterised in that：Described radio-frequency power test dress
Putting also includes CPU processor and display, and the input of the CPU processor and the RF output end of power-sensing circuit connect
Connect, the output end of CPU processor is connected with display.
7. a kind of radio-frequency power test device according to claim 1, it is characterised in that：Described radio-frequency power test dress
Putting also includes filter circuit, amplifying circuit and A/D change-over circuits, and the RF output end of the power-sensing circuit passes sequentially through filter
Wave circuit, amplifying circuit and A/D change-over circuits are connected with CPU processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720019986.6U CN206364810U (en) | 2017-01-09 | 2017-01-09 | A kind of radio-frequency power test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720019986.6U CN206364810U (en) | 2017-01-09 | 2017-01-09 | A kind of radio-frequency power test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206364810U true CN206364810U (en) | 2017-07-28 |
Family
ID=59380509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720019986.6U Expired - Fee Related CN206364810U (en) | 2017-01-09 | 2017-01-09 | A kind of radio-frequency power test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206364810U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733252A (en) * | 2017-09-22 | 2018-02-23 | 扬州芯智瑞电子科技有限公司 | A kind of regulator rectifier circuit for carrying temperature-compensating |
-
2017
- 2017-01-09 CN CN201720019986.6U patent/CN206364810U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733252A (en) * | 2017-09-22 | 2018-02-23 | 扬州芯智瑞电子科技有限公司 | A kind of regulator rectifier circuit for carrying temperature-compensating |
| CN107733252B (en) * | 2017-09-22 | 2020-05-15 | 扬州芯智瑞电子科技有限公司 | Rectification voltage stabilizing circuit with temperature compensation function |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170728 Termination date: 20180109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |