CN116455483B - Third-order intermodulation level test system and test method for gyromagnetic device - Google Patents
Third-order intermodulation level test system and test method for gyromagnetic device Download PDFInfo
- Publication number
- CN116455483B CN116455483B CN202310713028.9A CN202310713028A CN116455483B CN 116455483 B CN116455483 B CN 116455483B CN 202310713028 A CN202310713028 A CN 202310713028A CN 116455483 B CN116455483 B CN 116455483B
- Authority
- CN
- China
- Prior art keywords
- signal source
- power
- port
- signal
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 238000010998 test method Methods 0.000 title claims abstract description 10
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000003321 amplification Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
- H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Gyroscopes (AREA)
Abstract
The invention discloses a third-order intermodulation level test system and a test method for gyromagnetic devices, which are used for the third-order intermodulation level of two paths of signals in gyromagnetic devices, wherein the test system is formed by constructing instrument equipment such as a signal source, a power synthesizer, an attenuator, a frequency meter and the like; the first signal source and the second signal source are respectively connected with two input ends of the power synthesizer after power amplification, signal isolation and band-pass filtration, the output end of the power synthesizer is connected with the input end of the directional coupler through the low-pass filter, the coupling end of the directional coupler is connected with the power meter, the rated load power is larger than the maximum transmission power of the test system, one end of the attenuator is connected with the frequency spectrograph, and the first signal source and the second signal source are both signal sources with adjustable frequency and power. The invention can test the third-order intermodulation performance of the gyromagnetic device under a larger horizontal power signal, and improves the reliability and accuracy of the test.
Description
Technical Field
The invention relates to a third-order intermodulation level test system and method, in particular to a third-order intermodulation level test system and method for gyromagnetic devices.
Background
When two different frequencies are f 1 And f 2 When the signal of (2) enters the gyromagnetic device, a second harmonic is generated in the gyromagnetic device, and the frequency is 2f 1 And 2f 2 Mixing the second harmonic signal with the fundamental frequency signal generates a third-order intermodulation interference signal 2f 1 -f 2 2f 2 -f 1 The third-order intermodulation interference signal deteriorates communication quality. With the development of communication technology, communication systems are in the spotlightThe interference problem of near channels is increasingly prominent, and high requirements are put on the third-order intermodulation level of gyromagnetic devices in the system, so that a system and a method for testing the third-order intermodulation level of the gyromagnetic devices are needed.
The existing third-order intermodulation test system and method utilize two power signal generators to send out different frequencies f 1 And f 2 2 power signals are synthesized, the synthesized signals enter a receiver after passing through a gyromagnetic device, and a receiver tests a frequency point 2f 1 -f 2 And 2f 2 -f 1 At the lower power level, the frequency point 2f is finally obtained 1 -f 2 And 2f 2 -f 1 The difference between the lower power and the fundamental frequency signal power is the third-order intermodulation level. But such third order intermodulation test systems and methods have the following drawbacks:
(1) The original test system does not contain components with out-of-band spurious signals filtered by a band-pass filter, a low-pass filter and the like, and third-order intermodulation interference signals of other components can be introduced into the receiver, so that the third-order intermodulation test result of the magneto-resistive device is inaccurate.
(2) The rear stage of the power signal generator of the original test system is not provided with a high-power isolator, the high-level power signal reflected by the test rear end cannot be absorbed, and if the rear stage of the power signal generator fails, the power signal is reflected, so that the power signal generator is burnt.
(3) The power level which can be generated by the power signal generator of the original test system is limited and is generally less than or equal to 10W, and higher-level power cannot be generated, so that the original test system cannot test the third-order intermodulation level of the gyromagnetic device under the higher power level.
Disclosure of Invention
The invention aims to provide a system and a method for testing the third-order intermodulation level of a gyromagnetic device, which can not only test the third-order intermodulation performance of the gyromagnetic device under a larger level power signal, but also improve the accuracy.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: three-layer gyromagnetic deviceAn intermodulation level testing system for testing frequency f 1 And a frequency f 2 The test system is formed by constructing a signal source, a power synthesizer, an attenuator, a frequency meter and other instruments;
the test system comprises a first signal source, a second signal source, a power synthesizer, an attenuator and a frequency meter;
the first signal source is connected with one input end of the power synthesizer after sequentially passing through the first power amplifier, the first isolator and the first band-pass filter;
the second signal source is connected with the other input end of the power synthesizer after passing through the second power amplifier, the second isolator and the second band-pass filter in sequence;
the output end of the power synthesizer is connected with the input end of the directional coupler through the low-pass filter, the coupling end of the directional coupler is connected with the power meter, and the output end of the directional coupler is marked as a port A;
the input end of the load is marked as a port B, the rated power of the load is larger than the maximum power transmitted by the test system, one end of the attenuator is connected with the spectrometer, and the other end of the attenuator is marked as a port E;
the first signal source and the second signal source are both signal sources with adjustable frequency and power.
As preferable: the out-of-band attenuation of the first band-pass filter and the second band-pass filter is more than or equal to 40dB;
intermodulation level of the power synthesizer is less than or equal to-90 dBm;
the out-of-band attenuation of the low-pass filter is more than or equal to 40dB;
the attenuation of the attenuator is more than or equal to 40dB.
A test method for a gyromagnetic device third-order intermodulation level test system comprises the following steps;
(1) Constructing a third-order intermodulation level testing system for the gyromagnetic device, selecting a gyromagnetic device with a third-order intermodulation level to be tested as a tested device, and marking the input end and the output end of the tested device as a port C and a port D respectively;
(2) Determining the frequency f of the first signal 1 Frequency f of the second signal 2 Output power P of first signal source 1 Output power P of the second signal source 2 ；
(3) Connecting port A and port B;
(4) Adjust the first signal source and record the adjustment position P 1 Comprising steps (41) - (42);
(41) Closing the second signal source and the second power amplifier, and opening the first signal source and the first power amplifier;
(42) Adjusting the frequency of the signal output by the first signal source to f 1 Then the power of the first signal source is regulated, and simultaneously the reading of the power meter is observed to reach the index requirement level, and the regulating position P of the first signal source is recorded 1 ；
(5) Adjust the second signal source and record the adjustment position P 2 Comprising steps (51) - (52);
(51) Closing the first signal source and the first power amplifier, and opening the second signal source and the second power amplifier;
(52) Adjusting the frequency of the signal output by the second signal source to f 2 Then the power of the second signal source is regulated, and simultaneously the reading of the power meter is observed to reach the index requirement level, and the regulating position P of the second signal source is recorded 2 ；
(6) Disconnecting the port A and the port B, and connecting the port A and the port C, and the port D and the port E;
(7) Simultaneously starting a first signal source, a second signal source, a first power amplifier and a power amplifier, and adjusting the first signal source and the second signal source to the adjusting positions recorded in the step (4) (5);
(8) Frequency point 2f with frequency spectrograph 1 -f 2 And 2f 2 -f 1 Where the third order intermodulation level of the device under test is measured.
Compared with the prior art, the invention has the advantages that:
(1) The power generator of the original test system is replaced by the combination of the signal source and the power amplifier, wherein the frequency and the power of the signal source are adjustable, so that the debugging is simpler and more flexible, and the test system can test the third-order intermodulation performance of the gyromagnetic device under a larger level power signal.
(2) The high-power capacity isolator is added at the rear stage of the power amplifier, so that the power amplifier is protected, and the reliability of a test system is improved; the band-pass filter and the low-pass filter are added in the test system, so that out-of-band spurious signals can be effectively blocked, and the test accuracy of the test system on the third-order intermodulation level of the magneto-resistive device is greatly improved.
(3) Based on the structure of the novel test system, the invention provides a test method which is simple and quick to operate and has high applicability.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Description of the embodiments
The invention will be further described with reference to the accompanying drawings.
Example 1: referring to fig. 1, a third-order intermodulation level test system for gyromagnetic devices is used for testing frequency f 1 And a frequency f 2 The test system is formed by constructing a signal source, a power synthesizer, an attenuator, a frequency meter and other instruments;
the test system comprises a first signal source, a second signal source, a power synthesizer, an attenuator and a frequency meter;
the first signal source is connected with one input end of the power synthesizer after sequentially passing through the first power amplifier, the first isolator and the first band-pass filter;
the second signal source is connected with the other input end of the power synthesizer after passing through the second power amplifier, the second isolator and the second band-pass filter in sequence;
the output end of the power synthesizer is connected with the input end of the directional coupler through the low-pass filter, the coupling end of the directional coupler is connected with the power meter, and the output end of the directional coupler is marked as a port A;
the input end of the load is marked as a port B, the rated power of the load is larger than the maximum power transmitted by the test system, one end of the attenuator is connected with the spectrometer, and the other end of the attenuator is marked as a port E;
the first signal source and the second signal source are both signal sources with adjustable frequency and power.
The out-of-band attenuation of the first band-pass filter and the second band-pass filter is more than or equal to 40dB, the intermodulation level of the power synthesizer is less than or equal to-90 dBm, the out-of-band attenuation of the low-pass filter is more than or equal to 40dB, and the attenuation of the attenuator is more than or equal to 40dB.
A test method for a gyromagnetic device third-order intermodulation level test system comprises the following steps;
(1) Constructing a third-order intermodulation level testing system for the gyromagnetic device, selecting a gyromagnetic device with a third-order intermodulation level to be tested as a tested device, and marking the input end and the output end of the tested device as a port C and a port D respectively;
(2) Determining the frequency f of the first signal 1 Frequency f of the second signal 2 Output power P of first signal source 1 Output power P of the second signal source 2 ；
(3) Connecting port A and port B;
(4) Adjust the first signal source and record the adjustment position P 1 Comprising steps (41) - (42);
(41) Closing the second signal source and the second power amplifier, and opening the first signal source and the first power amplifier;
(42) Adjusting the frequency of the signal output by the first signal source to f 1 Then the power of the first signal source is regulated, and simultaneously the reading of the power meter is observed to reach the index requirement level, and the regulating position P of the first signal source is recorded 1 ；
(5) Adjust the second signal source and record the adjustment position P 2 Comprising steps (51) - (52);
(51) Closing the first signal source and the first power amplifier, and opening the second signal source and the second power amplifier;
(52) Adjusting the frequency of the signal output by the second signal source to f 2 Readjusting the secondThe power of the signal source is observed, the reading of the power meter is observed to reach the index requirement level, and the adjustment position P of the second signal source is recorded 2 ；
(6) Disconnecting the port A and the port B, and connecting the port A and the port C, and the port D and the port E;
(7) Simultaneously starting a first signal source, a second signal source, a first power amplifier and a power amplifier, and adjusting the first signal source and the second signal source to the adjusting positions recorded in the step (4) (5);
(8) Frequency point 2f with frequency spectrograph 1 -f 2 And 2f 2 -f 1 Where the third order intermodulation level of the device under test is measured.
Example 2: referring to fig. 1, we perform a third-order intermodulation level test on two paths of signals with frequencies of 781MHz and 782MHz, and the measurement effects using the existing test method and the method of the present invention are shown in the following table 1 and table 2:
table 1 existing test System and test method test
。
Table 2 the test system and test method of the present invention
。
As can be seen from the comparison of the table, the third-order intermodulation level of the same gyromagnetic device is tested, the third-order intermodulation level is tested to be-46.2 dBm by using the prior art, and the third-order intermodulation level is tested to be-57.9 dBm by using the method disclosed by the invention, so that the measurement precision is improved by 25%.
Of course, P 1 、P 2 Not limited to 43dBm, and generally has the same value according to the requirements of users.
The test system is added with the power amplifier, and the power output by the signal source obtains a larger level power signal through the power amplifier, so that the third-order intermodulation performance of the gyromagnetic device under the larger level power signal can be tested.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (3)
1. Three-order intermodulation level test system for gyromagnetic device and used for testing frequency f 1 And a frequency f 2 The third-order intermodulation level of the second signal in the gyromagnetic device comprises a test system and a load, and is characterized in that:
the test system comprises a first signal source, a second signal source, a power synthesizer, an attenuator and a spectrometer;
the first signal source is connected with one input end of the power synthesizer after sequentially passing through the first power amplifier, the first isolator and the first band-pass filter;
the second signal source is connected with the other input end of the power synthesizer after passing through the second power amplifier, the second isolator and the second band-pass filter in sequence;
the output end of the power synthesizer is connected with the input end of the directional coupler through the low-pass filter, the coupling end of the directional coupler is connected with the power meter, and the output end of the directional coupler is marked as a port A;
the input end of the load is marked as a port B, the rated power of the load is larger than the maximum power transmitted by the test system, one end of the attenuator is connected with the spectrometer, and the other end of the attenuator is marked as a port E;
the first signal source and the second signal source are both signal sources with adjustable frequency and power.
2. The third order intermodulation level testing system for a gyromagnetic device according to claim 1, wherein: the out-of-band attenuation of the first band-pass filter and the second band-pass filter is more than or equal to 40dB;
intermodulation level of the power synthesizer is less than or equal to-90 dBm;
the out-of-band attenuation of the low-pass filter is more than or equal to 40dB;
the attenuation of the attenuator is more than or equal to 40dB.
3. The test method for a gyromagnetic device third-order intermodulation level test system, according to claim 1, wherein: comprises the following steps of;
(1) Constructing a third-order intermodulation level testing system for the gyromagnetic device, selecting a gyromagnetic device with a third-order intermodulation level to be tested as a tested device, and marking the input end and the output end of the tested device as a port C and a port D respectively;
(2) Determining the frequency f of the first signal 1 Frequency f of the second signal 2 Output power P of first signal source 1 Output power P of the second signal source 2 ；
(3) Connecting port A and port B;
(4) Adjust the first signal source and record the adjustment position P 1 Comprising steps (41) - (42);
(41) Closing the second signal source and the second power amplifier, and opening the first signal source and the first power amplifier;
(42) Adjusting the frequency of the signal output by the first signal source to f 1 Then the power of the first signal source is regulated, and simultaneously the reading of the power meter is observed to reach the index requirement level, and the regulating position P of the first signal source is recorded 1 ；
(5) Adjust the second signal source and record the adjustment position P 2 Comprising steps (51) - (52);
(51) Closing the first signal source and the first power amplifier, and opening the second signal source and the second power amplifier;
(52) Adjusting the frequency of the signal output by the second signal source to f 2 Then the power of the second signal source is regulated, and simultaneously the reading of the power meter is observed to reach the index requirement level, and the regulating position P of the second signal source is recorded 2 ；
(6) Disconnecting the port A and the port B, and connecting the port A and the port C, and the port D and the port E;
(7) Simultaneously starting a first signal source, a second signal source, a first power amplifier and a second power amplifier, and adjusting the first signal source and the second signal source to the adjusting positions recorded in the step (4) (5);
(8) Frequency point 2f with frequency spectrograph 1 -f 2 And 2f 2 -f 1 Where the third order intermodulation level of the device under test is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310713028.9A CN116455483B (en) | 2023-06-16 | 2023-06-16 | Third-order intermodulation level test system and test method for gyromagnetic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310713028.9A CN116455483B (en) | 2023-06-16 | 2023-06-16 | Third-order intermodulation level test system and test method for gyromagnetic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116455483A CN116455483A (en) | 2023-07-18 |
| CN116455483B true CN116455483B (en) | 2023-09-12 |
Family
ID=87122324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310713028.9A Active CN116455483B (en) | 2023-06-16 | 2023-06-16 | Third-order intermodulation level test system and test method for gyromagnetic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116455483B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8410786B1 (en) * | 2008-10-06 | 2013-04-02 | Anritsu Company | Passive intermodulation (PIM) distance to fault analyzer with selectable harmonic level |
| CN103675448A (en) * | 2013-12-16 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Vector measurement method for passive intermodulation interference |
| CN104301049A (en) * | 2014-10-16 | 2015-01-21 | 国家电网公司 | Dual-channel passive device power tolerance testing system |
| CN207200713U (en) * | 2017-09-08 | 2018-04-06 | 南京汉瑞微波通信有限公司 | A kind of passive cross modulation test system |
| CN115295995A (en) * | 2022-07-21 | 2022-11-04 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Broadband circuit of high intermodulation circulator |
| WO2023077890A1 (en) * | 2021-11-02 | 2023-05-11 | 横店集团东磁股份有限公司 | Microwave ferrite material for third-order intermodulation circulator and preparation method therefor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010141860A1 (en) * | 2009-06-04 | 2010-12-09 | Purdue Research Foundation | Magnetic field system and method for mitigating passive intermodulation distortion |
-
2023
- 2023-06-16 CN CN202310713028.9A patent/CN116455483B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8410786B1 (en) * | 2008-10-06 | 2013-04-02 | Anritsu Company | Passive intermodulation (PIM) distance to fault analyzer with selectable harmonic level |
| CN103675448A (en) * | 2013-12-16 | 2014-03-26 | 中国电子科技集团公司第四十一研究所 | Vector measurement method for passive intermodulation interference |
| CN104301049A (en) * | 2014-10-16 | 2015-01-21 | 国家电网公司 | Dual-channel passive device power tolerance testing system |
| CN207200713U (en) * | 2017-09-08 | 2018-04-06 | 南京汉瑞微波通信有限公司 | A kind of passive cross modulation test system |
| WO2023077890A1 (en) * | 2021-11-02 | 2023-05-11 | 横店集团东磁股份有限公司 | Microwave ferrite material for third-order intermodulation circulator and preparation method therefor |
| CN115295995A (en) * | 2022-07-21 | 2022-11-04 | 西南应用磁学研究所(中国电子科技集团公司第九研究所) | Broadband circuit of high intermodulation circulator |
Non-Patent Citations (1)
| Title |
|---|
| Third-Order Intermodulation Effects and System Sensitivity Degradation in Receive-Mode 5G Phased Arrays in the Presence of Multiple Interferers;Bhaskara Rupakula;IEEE Transactions on Microwave Theory and Techniques;1-16 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116455483A (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7304469B1 (en) | Adaptive method used to overcome channel to channel isolation | |
| KR100421277B1 (en) | Architecture for rf signal automatic test equipment | |
| US6606583B1 (en) | Real-time error-suppression method and apparatus therefor | |
| US8314604B2 (en) | Apparatus and method for spurious-free signal range measurement for RF circuitry | |
| Abidi et al. | De-embedding the noise figure of differential amplifiers | |
| CN102752061B (en) | Device and method for generating reference signal of phase-locked amplifier of millimeter wave attenuation measurement system | |
| CN104536339B (en) | High-speed-digital-demodulation-based power control system and method of vector network analyzer | |
| JP2002217847A (en) | Apparatus and method for dynamic range | |
| Breed | Intermodulation Distortion Performance and Measurement Issues | |
| US7002335B2 (en) | Method for measuring a three-port device using a two-port vector network analyzer | |
| Ballo | Network analyzer basics | |
| CN109150332B (en) | Device and method for pre-measuring passive intermodulation by using vector harmonics | |
| CN110988490A (en) | Power filter differential loss time domain measurement system and method | |
| CN107247696A (en) | A kind of method that S2P file acquisition loss balancing data are called in Noise Factor Analyzer | |
| CN116455483B (en) | Third-order intermodulation level test system and test method for gyromagnetic device | |
| Hsieh et al. | Integrated CMOS power sensors for RF BIST applications | |
| US20060290358A1 (en) | Method and circuit for measuring characteristic parameters of intermodulation distortion | |
| CN109412621B (en) | Four-channel independent amplitude-stabilized local oscillator power dividing device and method | |
| CN110988548B (en) | Test method and platform for microwave frequency converter | |
| CN110166147B (en) | Base station antenna intermodulation fault positioning test system and method | |
| Tariq et al. | Novel cost-effective passive intermodulation measurement technique using a single power amplifier | |
| JP2012032393A (en) | Distortion measurement apparatus | |
| KR100786730B1 (en) | Portable PIMD measuring process | |
| CN219122317U (en) | Radio frequency device detection system | |
| Tariq et al. | Development of Single Measurement Setup to Test S-Parameters and Distortions of Microwave Devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |