CN106569018B - Peak detection circuit for radio frequency power meter - Google Patents
Peak detection circuit for radio frequency power meter Download PDFInfo
- Publication number
- CN106569018B CN106569018B CN201610915504.5A CN201610915504A CN106569018B CN 106569018 B CN106569018 B CN 106569018B CN 201610915504 A CN201610915504 A CN 201610915504A CN 106569018 B CN106569018 B CN 106569018B
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- Prior art keywords
- amplifier
- power meter
- selection switch
- video bandwidth
- detection circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmitters (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a peak detection circuit for a radio frequency power meter, which comprises a first amplifier, a filter resistor, a filter capacitor, a second amplifier, a video bandwidth selection switch, a voltage comparator and an emitter follower, wherein the first amplifier is connected with the filter resistor, the filter capacitor and the video bandwidth selection switch at one time, the second amplifier is connected with the video bandwidth selection switch, and the video bandwidth selection switch, the voltage comparator and the emitter follower are sequentially connected. The peak detection circuit for the radio frequency power meter adopts the elements such as the amplifier, the video bandwidth selection switch, the voltage comparator, the emitter follower and the like, so that the peak value measurement is more accurate.
Description
Technical Field
The invention relates to the field of radio frequency power meters, in particular to a peak detection circuit for a radio frequency power meter.
Background
Power reflectometers are commonly used to measure the power of Radio Frequency (RF) or microwave frequency (MW) signals. Typical power reflectometers use power detectors or transducers to convert RF or MW power into an electrical parameter that can be easily measured. Power reflectometers also have application in many types of RF and MW systems.
The peak detection circuit is used as a key component of the power reflectometer, the performance of the peak detection circuit influences the accuracy of subsequent data processing to a great extent, and the existing peak detection circuit has a single processing mode and cannot well achieve the required accuracy.
Disclosure of Invention
The present invention overcomes the above-mentioned deficiencies of the prior art and provides a peak detector circuit for a radio frequency power reflectometer that improves signal processing accuracy.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a peak detection circuit for a radio frequency power meter comprises a first amplifier, a filter resistor, a filter capacitor, a second amplifier, a video bandwidth selection switch, a voltage comparator and an emitter follower, wherein the first amplifier is connected with the filter resistor, the filter capacitor and the video bandwidth selection switch at one time, the second amplifier is connected with the video bandwidth selection switch, and the video bandwidth selection switch, the voltage comparator and the emitter follower are sequentially connected.
Further, the first amplifier is an AD8011 amplifier.
Further, the second amplifier is an AD745 amplifier.
Further, the video bandwidth selection switch comprises one or more of a 4K bandwidth gear selection, a 200K bandwidth gear selection, and a full bandwidth gear selection.
Further, the voltage comparator is an LT1011 comparator.
Compared with the prior art, the invention has the beneficial effects
The peak detection circuit for the radio frequency power meter adopts the elements such as the amplifier, the video bandwidth selection switch, the voltage comparator, the emitter follower and the like, so that the peak value measurement is more accurate.
Drawings
Fig. 1 is a block diagram of a peak detection circuit module for an rf power meter according to the present invention.
Fig. 2 is a diagram of a peak detection circuit for an rf power meter in accordance with one embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1:
fig. 1 is a block diagram of a peak detection circuit module for a radio frequency power meter according to the present invention, which includes a first amplifier, a filter resistor, a filter capacitor, a second amplifier, a video bandwidth selection switch, a voltage comparator, and an emitter follower, wherein the first amplifier is connected to the filter resistor, the filter capacitor, and the video bandwidth selection switch at a time, the second amplifier is connected to the video bandwidth selection switch, and the video bandwidth selection switch, the voltage comparator, and the emitter follower are connected in sequence.
In one embodiment, the first amplifier is an AD8011 amplifier.
In one embodiment, the second amplifier is an AD745 amplifier.
In one embodiment, the video bandwidth selection switch includes one or more of a 4K bandwidth gear selection, a 200K bandwidth gear selection, and a full bandwidth gear selection.
In one embodiment, the voltage comparator is an LT1011 comparator.
Specifically, fig. 2 is a diagram of a peak detector circuit for an rf power meter in an embodiment of the present invention, a signal of the peak detector circuit is amplified by two paths, AD8011 and AD745, AD8011 is a current feedback operational amplifier with a high bandwidth, and high-pass filtering is performed on an output signal to obtain a carrier signal with a high modulation frequency; meanwhile, low-pass filtering is carried out on the signal passing through the AD745 so as to obtain a carrier signal with lower modulation frequency; then, after the two paths of signals are combined, through an RC filter circuit, by utilizing three-level video bandwidth setting of 4k, 200k and FULL, through selecting different video bandwidths, the peak value measurement of different modulation modes is more accurate; after peak value holding, the signal is sent to an ADC to be converted into a digital signal; and finally, transmitting the peak power to a data processing circuit by the CPLD to obtain a peak power measurement result.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the above embodiments, and various modifications or alterations can be made by those skilled in the art without departing from the spirit and scope of the claims of the present application.
Claims (5)
1. A peak detection circuit for a radio frequency power meter is characterized by comprising a first amplifier, a filter resistor, a filter capacitor, a second amplifier, a video bandwidth selection switch, a voltage comparator and an emitter follower, wherein the first amplifier is connected with the filter resistor, the filter capacitor and the video bandwidth selection switch in sequence, the second amplifier is connected with the video bandwidth selection switch, and the video bandwidth selection switch, the voltage comparator and the emitter follower are connected in sequence;
signals of the peak detection circuit are amplified through an AD8011 path and an AD745 path, the AD8011 is a current feedback operational amplifier, and high-pass filtering is carried out on the signals output by the AD8011 path to obtain carrier signals with high modulation frequency; meanwhile, low-pass filtering is carried out on the signal passing through the AD745 so as to obtain a carrier signal with lower modulation frequency; and then combining the two paths of signals, and enabling peak value measurement of different modulation modes to be more accurate by using three-level video bandwidth settings of 4k, 200k and FULL through an RC (resistance-capacitance) filter circuit and selecting different video bandwidths.
2. The peak detector circuit of claim 1, wherein the first amplifier is an AD8011 amplifier.
3. The peak detector circuit for a radio frequency power meter according to claim 1, wherein the second amplifier is an AD745 amplifier.
4. The peak detection circuit for the rf power meter according to claim 1, wherein the video bandwidth selector switch is one or more of a 4K bandwidth step selector switch, a 200K bandwidth step selector switch, and a full bandwidth step selector switch.
5. The peak detector circuit for a radio frequency power meter according to claim 1, wherein the voltage comparator is an LT1011 comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915504.5A CN106569018B (en) | 2016-10-20 | 2016-10-20 | Peak detection circuit for radio frequency power meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915504.5A CN106569018B (en) | 2016-10-20 | 2016-10-20 | Peak detection circuit for radio frequency power meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106569018A CN106569018A (en) | 2017-04-19 |
| CN106569018B true CN106569018B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610915504.5A Active CN106569018B (en) | 2016-10-20 | 2016-10-20 | Peak detection circuit for radio frequency power meter |
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| CN (1) | CN106569018B (en) |
Citations (10)
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| JPS553235A (en) * | 1978-06-21 | 1980-01-11 | Sanyo Electric Co Ltd | Pulse noise detection circuit |
| US6445327B1 (en) * | 1999-11-11 | 2002-09-03 | Anritsu Corporation | Signal analyzing apparatus |
| CN1804642A (en) * | 2006-01-23 | 2006-07-19 | 天津市德力电子仪器有限公司 | Middle-frequency completely digital frequency spectrum |
| CN101471723A (en) * | 2007-12-26 | 2009-07-01 | 北京朗波芯微技术有限公司 | Bidirectional dynamic amplification method and apparatus for TDD system |
| CN103973238A (en) * | 2013-01-31 | 2014-08-06 | 台扬科技股份有限公司 | Radio Frequency Signal Amplifier And Amplifying System |
| CN104101778A (en) * | 2014-07-18 | 2014-10-15 | 中国电子科技集团公司第四十一研究所 | 67GHz coaxial broadband peak power probe |
| CN104541221A (en) * | 2012-08-10 | 2015-04-22 | 德克萨斯仪器股份有限公司 | Switched mode assisted linear regulator |
| CN105372484A (en) * | 2014-08-12 | 2016-03-02 | 罗德施瓦兹两合股份有限公司 | Power meter with two detector elements for a power measurement even of extremely low frequencies |
| CN105790781A (en) * | 2016-01-22 | 2016-07-20 | 蔡婷婷 | Feedback control method of communication receiver |
| CN206235659U (en) * | 2016-10-20 | 2017-06-09 | 成都前锋电子仪器有限责任公司 | A kind of peak-detector circuit for radio frequency power meter |
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2016
- 2016-10-20 CN CN201610915504.5A patent/CN106569018B/en active Active
Patent Citations (10)
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|---|---|---|---|---|
| JPS553235A (en) * | 1978-06-21 | 1980-01-11 | Sanyo Electric Co Ltd | Pulse noise detection circuit |
| US6445327B1 (en) * | 1999-11-11 | 2002-09-03 | Anritsu Corporation | Signal analyzing apparatus |
| CN1804642A (en) * | 2006-01-23 | 2006-07-19 | 天津市德力电子仪器有限公司 | Middle-frequency completely digital frequency spectrum |
| CN101471723A (en) * | 2007-12-26 | 2009-07-01 | 北京朗波芯微技术有限公司 | Bidirectional dynamic amplification method and apparatus for TDD system |
| CN104541221A (en) * | 2012-08-10 | 2015-04-22 | 德克萨斯仪器股份有限公司 | Switched mode assisted linear regulator |
| CN103973238A (en) * | 2013-01-31 | 2014-08-06 | 台扬科技股份有限公司 | Radio Frequency Signal Amplifier And Amplifying System |
| CN104101778A (en) * | 2014-07-18 | 2014-10-15 | 中国电子科技集团公司第四十一研究所 | 67GHz coaxial broadband peak power probe |
| CN105372484A (en) * | 2014-08-12 | 2016-03-02 | 罗德施瓦兹两合股份有限公司 | Power meter with two detector elements for a power measurement even of extremely low frequencies |
| CN105790781A (en) * | 2016-01-22 | 2016-07-20 | 蔡婷婷 | Feedback control method of communication receiver |
| CN206235659U (en) * | 2016-10-20 | 2017-06-09 | 成都前锋电子仪器有限责任公司 | A kind of peak-detector circuit for radio frequency power meter |
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| CN106569018A (en) | 2017-04-19 |
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