CN203027215U - Radio-frequency detector circuit - Google Patents
Radio-frequency detector circuit Download PDFInfo
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- CN203027215U CN203027215U CN 201320006757 CN201320006757U CN203027215U CN 203027215 U CN203027215 U CN 203027215U CN 201320006757 CN201320006757 CN 201320006757 CN 201320006757 U CN201320006757 U CN 201320006757U CN 203027215 U CN203027215 U CN 203027215U
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- radio
- frequency
- detector diode
- damping resistance
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Abstract
The utility model provides a radio-frequency detector circuit relating to the field of a radio-frequency circuit. The radio-frequency detector circuit comprises a radio-frequency signal input end, a detector diode, a detection output end, a first matched resistor and a second matched resistor; the input end of the detector diode is connected with the radio-frequency input end and further connected with one end of the first matched resistor; the other end of the first matched resistor is grounded; and the detection output end is connected with the output end of the detector diode by the second matched resistor. The radio-frequency detector circuit further comprises a coupling resistor and two coupling capacitors; and the radio-frequency signal input end is orderly connected to the input end of the detector diode by the coupling resistor and the coupling capacitors connected in series. By using the radio-frequency detector circuit disclosed by the utility model, signals can be detected and the electric level of the radio-frequency signals can be stably transformed in a radio-frequency link.
Description
Technical field
This is novel relates to radio circuit field, espespecially a kind of detecting circuit structure of radio frequency link.
Background technology
RF detection circuit is widely used in the receiving equipment of high-frequency signal, and in the high-frequency signal receiving course, it need to be converted to DC level with receiving signal, then carries out various other inputs, to reach the conversion purpose of signal.Yet the modulation amplitude of carrier wave can not be too large in detection process, otherwise will reduce the level impact input that receives signal.In the middle of general detecting circuit, when it carries out filtering with filter capacitor, certainly the filter capacitor value is better, but consider the radio-frequency emission power problem, capacitance can't arrange too large, otherwise will the more radio-frequency carrier signal of bypass, and simultaneously for adapting to coupling capacitance and filter capacitor capacitive reactance difference, both are can not difference too large, prevent that the signal to noise ratio that causes circuit from reducing.Thereby selecting so between the two restricted.
Summary of the invention
The utility model purpose is to abandon the shortcoming of prior art, and providing a kind of can also stablize the circuit structure of conversion level of RF signals by detection signal from radio frequency link.
For solving the problems of the technologies described above, the technical scheme of this novel employing is as follows:
construct a kind of RF detection circuit, comprise radio-frequency (RF) signal input end, detector diode, the detection output, the first build-out resistor and the second build-out resistor, the input of described detector diode is connected with radio-frequency (RF) signal input end, the input of detector diode also is connected with an end of the first build-out resistor, the other end ground connection of the first build-out resistor, the detection output connects the output of detector diode by the second build-out resistor, it also comprises coupling resistance and two coupling capacitances, described radio-frequency (RF) signal input end is the input that is connected in described detector diode of coupling resistance and the coupling capacitance by mutual series connection successively.
Further, also connect the first damping resistance between two coupling capacitances, the two ends of the first damping resistance connect respectively an end of the second damping resistance and the 3rd damping resistance, the other end ground connection of the second damping resistance and the 3rd damping resistance, the first damping resistance, the second damping resistance and the 3rd damping resistance form π type structure.
Further, RF detection circuit also comprises integrating resistor and integrating capacitor parallel circuits parallel with one another, and an end of parallel circuits is connected between the output of the second build-out resistor and detector diode, other end ground connection.
Preferably, described detector diode is selected MS-285C.
This novel beneficial effect is: when using coupling capacitance, increase the damped impedance of π type structure between the two, thereby increase the impedance of input, in filter structure, the value of filter capacitor can increase, and minimizing has influence on the generation of signal to noise ratio problem, improve filter effect, improve signal to noise ratio.
Description of drawings
Fig. 1 is this novel electrical block diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments to this novel being described in further detail.
as shown in Figure 1, it has disclosed the concrete structure of this novel preferred embodiment, a kind of RF detection circuit, comprise radio-frequency (RF) signal input end RF3, detector diode U3, detection output V1, the first build-out resistor and the second build-out resistor, the input 2 of described detector diode is connected with radio-frequency (RF) signal input end RF3, the input of detector diode also is connected with the end of the first build-out resistor R13, the other end ground connection of the first build-out resistor R13, detection output 1 connects the output V1 of detector diode by the second build-out resistor R7, it also comprises coupling resistance R8 and two coupling capacitance C8, C9, described radio-frequency (RF) signal input end is coupling resistance R8 and the coupling capacitance C8 by mutually connecting successively, C9 is connected in the input 2 of described detector diode.
Further, also connect the first damping resistance R9 between two coupling capacitances, the two ends of the first damping resistance connect respectively the end of the second damping resistance R11 and the 3rd damping resistance R12, the other end ground connection of the second damping resistance and the 3rd damping resistance, three damping resistance R9, R11, R12 form π type structure.
Further, RF detection circuit also comprises integrating resistor R10 and integrating capacitor C10 parallel circuits parallel with one another, and an end of parallel circuits is connected between the output 1 of the second build-out resistor R7 and detector diode, other end ground connection.
Preferably, described detector diode is selected MS-285C.
The above, it is only this novel preferred embodiment, be not that novel technical scope is imposed any restrictions, therefore this novel technical spirit of every foundation all still belongs in the scope that originally is equal to the utility model technical scheme any trickle modification, equivalent variations and modification that above embodiment does.
Claims (4)
1. RF detection circuit, comprise radio-frequency (RF) signal input end, detector diode, the detection output, the first build-out resistor and the second build-out resistor, the input of described detector diode is connected with radio-frequency (RF) signal input end, the input of detector diode also is connected with an end of the first build-out resistor, the other end ground connection of the first build-out resistor, the detection output connects the output of detector diode by the second build-out resistor, it is characterized in that: also comprise coupling resistance and two coupling capacitances, the described radio-frequency (RF) signal input end coupling resistance by mutual series connection and two coupling capacitances successively is connected in the input of described detector diode, also be connected with the first damping resistance between two coupling capacitances.
2. RF detection circuit according to claim 1, it is characterized in that: the two ends of the first damping resistance connect respectively an end of the second damping resistance and the 3rd damping resistance, the other end ground connection of the second damping resistance and the 3rd damping resistance, the first damping resistance, the second damping resistance and the 3rd damping resistance form π type structure.
3. RF detection circuit according to claim 1, it is characterized in that: also comprise the parallel circuits that integrating resistor and integrating capacitor are parallel with one another, an end of parallel circuits is connected between the output of the second build-out resistor and detector diode, other end ground connection.
4. RF detection circuit according to claim 1, it is characterized in that: described detector diode is MS-285C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320006757 CN203027215U (en) | 2013-01-05 | 2013-01-05 | Radio-frequency detector circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320006757 CN203027215U (en) | 2013-01-05 | 2013-01-05 | Radio-frequency detector circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203027215U true CN203027215U (en) | 2013-06-26 |
Family
ID=48651158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320006757 Expired - Fee Related CN203027215U (en) | 2013-01-05 | 2013-01-05 | Radio-frequency detector circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203027215U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255251A (en) * | 2016-08-31 | 2016-12-21 | 广东美的厨房电器制造有限公司 | Microwave testing circuit and comprise the microwave oven of this microwave testing circuit |
| CN106353586A (en) * | 2016-10-21 | 2017-01-25 | 成都前锋电子仪器有限责任公司 | Coupling and detection circuit |
| CN107202917A (en) * | 2017-03-31 | 2017-09-26 | 北京大学 | A kind of radio frequency power detector of inverse RSSI frameworks |
-
2013
- 2013-01-05 CN CN 201320006757 patent/CN203027215U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106255251A (en) * | 2016-08-31 | 2016-12-21 | 广东美的厨房电器制造有限公司 | Microwave testing circuit and comprise the microwave oven of this microwave testing circuit |
| CN106353586A (en) * | 2016-10-21 | 2017-01-25 | 成都前锋电子仪器有限责任公司 | Coupling and detection circuit |
| CN106353586B (en) * | 2016-10-21 | 2023-07-04 | 成都前锋电子仪器有限责任公司 | Coupling detection circuit |
| CN107202917A (en) * | 2017-03-31 | 2017-09-26 | 北京大学 | A kind of radio frequency power detector of inverse RSSI frameworks |
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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 |
Granted publication date: 20130626 Termination date: 20160105 |