CN218896194U - Calibration device for anti-interference test equipment - Google Patents
Calibration device for anti-interference test equipment Download PDFInfo
- Publication number
- CN218896194U CN218896194U CN202221647691.0U CN202221647691U CN218896194U CN 218896194 U CN218896194 U CN 218896194U CN 202221647691 U CN202221647691 U CN 202221647691U CN 218896194 U CN218896194 U CN 218896194U
- Authority
- CN
- China
- Prior art keywords
- interference
- equipment
- test
- signal
- calibration
- 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
Images
Classifications
-
- 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
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The utility model relates to an anti-interference test equipment calibration device, which comprises a test shielding box, signal generating equipment, calibration equipment and an industrial personal computer, wherein the industrial personal computer controls the signal generating equipment to generate interference signals, the interference signals are transmitted through an interference signal transmitting antenna, after receiving the interference signals through a frequency spectrum monitoring antenna, the received interference signals are transmitted to the industrial personal computer through the calibration equipment, and the industrial personal computer enables the interference signals received by the calibration equipment to be consistent with the interference signals generated by the signal generating equipment through fine adjustment of the signal generating equipment; the position measuring antenna receives the interference signal, the received interference signal is sent to the industrial personal computer through the calibration equipment, and the positions of the position measuring antenna and the interference signal transmitting antenna are adjusted to enable the interference signal received by the calibration equipment and the interference signal transmitted by the interference signal transmitting antenna to be consistent. The calibration device is easy to operate, the whole calibration process is simple and quick, and the measurement accuracy of the calibrated anti-interference test equipment is high.
Description
Technical Field
The utility model relates to the technical field of wireless test equipment, in particular to a calibration device of anti-interference test equipment.
Background
Along with the massive application of mobile terminals, mobile internet and hot spot equipment, although the mobile terminal brings convenience to the daily life of people, the transmission environment of wireless signals is more and more complex, and the wireless equipment working on the same or similar frequency bands interfere with each other, so that the normal operation of the wireless signal transmitting equipment and the wireless signal receiving equipment is affected.
When the wireless signal receiving equipment is tested, a good test environment is required to be provided for the wireless signal receiving equipment, so that the wireless signal testing equipment provides a sealed test box body with an electromagnetic signal shielding function for the wireless signal receiving equipment, and a test device and equipment to be tested are placed in the test box body.
Because the test box body and each component part have product tolerance, the test result can be greatly influenced, and in order to ensure the measurement precision of the test equipment, the test device and the component parts in the test box body are required to be subjected to frequency spectrum calibration and position calibration.
Disclosure of Invention
In view of the foregoing, it is necessary to provide a calibration device for an anti-interference test device with convenient operation and simple structure.
An anti-interference test equipment calibrating device is used for frequency spectrum calibration and antenna position calibration of anti-interference test equipment and comprises a test shielding box, signal generating equipment, calibrating equipment and an industrial personal computer:
the test shielding box is used for simulating a wireless signal transmission environment, so that an anti-interference test of the wireless receiving equipment is not interfered by external electromagnetic signals;
the industrial personal computer is connected to the signal generating equipment and the calibration equipment and is used for generating parameter values of interference signals generated by the signal generating equipment so that the interference signals meet the test requirements;
the signal generating equipment is used for generating a target interference frequency spectrum according to the parameter value output by the industrial personal computer and sending out the target interference frequency spectrum through the interference signal transmitting antenna;
the calibration device is used for analyzing the interference signals received by the frequency spectrum monitoring antenna and the position measuring antenna so as to obtain the interference signal frequency spectrum in the test shielding box.
Further, the signal generating device comprises a signal generator, a signal filter and a signal amplifier which are sequentially connected, wherein a control end of the signal generator is connected to the industrial personal computer, an output end of the signal amplifier is connected to the interference signal transmitting antenna, the signal generator generates a target interference frequency spectrum, noise in a signal is filtered by the signal filter, and the signal is transmitted to the interference signal transmitting antenna to be transmitted after being amplified by the signal amplifier.
Further, the calibration device comprises a first spectrometer and a second spectrometer, wherein the input end of the first spectrometer is electrically connected to the spectrum monitoring antenna, the input end of the second spectrometer is electrically connected to the position measuring antenna, and the output ends of the first spectrometer and the second spectrometer are electrically connected to the industrial personal computer.
Further, a first mobile platform and a second mobile platform are further arranged in the test shielding box, the first mobile platform and the second mobile platform are arranged on the same inner side wall or different inner side walls in the test shielding box, the interference signal transmitting antenna and the frequency spectrum monitoring antenna are arranged on the first mobile platform, the position measuring antenna is arranged on the second mobile platform, and the first mobile platform and the second mobile platform respectively drive the interference signal transmitting antenna, the frequency spectrum monitoring antenna and the position measuring antenna to move.
Further, the first moving platform comprises a first sliding rail, a first moving motor, a first position locking mechanism and an equipment mounting bracket, the first moving motor is detachably mounted at one end of the first sliding rail, the first moving motor is used for driving the equipment mounting bracket to move along the first sliding rail, the interference signal transmitting antenna and the frequency spectrum monitoring antenna are mounted on the equipment mounting bracket in parallel, and the first position locking mechanism is used for locking the equipment mounting bracket, so that the position of the equipment mounting bracket after calibration is completed is not moved any more.
Further, the second moving platform comprises a second sliding rail, a second moving motor, a second position locking mechanism and an equipment clamping jig, the second moving motor is detachably arranged at one end of the second sliding rail, the second moving motor is used for driving the equipment clamping jig to move along the second sliding rail, the position measuring antenna is arranged on the equipment clamping jig, and the second position locking mechanism is used for locking the equipment clamping jig, so that the position of the equipment clamping jig after calibration is completed is not moved.
Further, a swing motor is arranged below the equipment clamping jig, and the swing motor is used for swinging the equipment clamping jig at a preset angle so as to simulate the state of equipment to be tested in use.
Further, the first mobile motor, the second mobile motor and the swinging motor are connected to the industrial personal computer, and the industrial personal computer respectively sends operation instructions to the first mobile motor, the second mobile motor and the swinging motor.
Further, the test shielding box comprises an upper half box body and a lower half box body, the upper half box body is movably connected with the lower half box body through a connecting piece, and after the upper half box body and the lower half box body are covered, a closed test cavity is formed inside the test shielding box.
Further, the test shielding box is made of wave absorbing materials so as to reduce the interference of electromagnetic waves inside and outside the test shielding box.
In the above calibration device for anti-interference test equipment, the industrial personal computer controls the signal generation equipment to generate an interference signal and transmits the interference signal through the interference signal transmitting antenna, after the spectrum monitoring antenna receives the interference signal, the received interference signal is sent to the industrial personal computer through the calibration equipment, and the industrial personal computer performs fine adjustment on the signal generation equipment to enable the interference signal received by the calibration equipment and the interference signal generated by the signal generation equipment to be consistent; the position measuring antenna receives interference signals, the received interference signals are sent to the industrial personal computer through the calibration equipment, and the positions of the position measuring antenna and the interference signal transmitting antenna are adjusted to enable the interference signals received by the calibration equipment and the interference signals transmitted by the interference signal transmitting antenna to be consistent; after the calibration of the anti-interference test equipment is completed, the accuracy of the test result of the anti-interference test equipment is improved, so that the anti-interference test equipment can provide a standard test environment, the test results of the same wireless signal received in different anti-interference test equipment are the same, and the consistency of the products of the anti-interference test equipment is ensured. The calibration device is easy to operate, the whole calibration process is simple and quick, and the measurement accuracy of the anti-interference test equipment after calibration is high. The product of the utility model has simple structure, easy production, low cost and convenient popularization.
Drawings
FIG. 1 is a schematic structural diagram of a calibration device for an anti-interference test apparatus according to an embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a test shielding box of a calibration device for an anti-interference test apparatus according to an embodiment of the present utility model.
Fig. 3 is a schematic diagram of a test shielding box of the calibration device of the anti-interference test apparatus according to the second embodiment of the present utility model.
Detailed Description
The present utility model will be described in detail with reference to specific embodiments and drawings.
Referring to fig. 1, 2 and 3, an apparatus 100 for calibrating an anti-interference test device according to an embodiment of the present utility model is used for spectrum calibration and antenna position calibration of the anti-interference test device, and includes a test shielding box 10, a signal generating device 20, a calibration device 30 and an industrial personal computer 40:
the test shielding box 10 is internally provided with an interference signal transmitting antenna 11, a frequency spectrum monitoring antenna 12 and a position measuring antenna 13, and the test shielding box 10 is used for simulating a wireless signal transmission environment so that the anti-interference test of the wireless receiving equipment is not interfered by external electromagnetic signals;
the industrial personal computer 40 is connected to the signal generating device 20 and the calibration device 30, and the industrial personal computer 40 is used for generating parameter values of the interference signal generated by the signal generating device 20, so that the interference signal meets the test requirement;
the signal generating device 20 is configured to generate a target interference spectrum according to the parameter value output by the industrial personal computer 40, and send the target interference spectrum through the interference signal transmitting antenna 11;
the calibration device 30 is configured to parse the interference signals received by the spectrum monitoring antenna 12 and the position measuring antenna 13 to obtain an interference signal spectrum in the test shielding box 10.
Further, the signal generating device 20 includes a signal generator 21, a signal filter 22 and a signal amplifier 23, which are sequentially connected, the control end of the signal generator 21 is connected to the industrial personal computer 40, the output end of the signal amplifier 23 is connected to the interference signal transmitting antenna 11, the signal generator 21 generates a target interference spectrum, filters noise in a signal through the signal filter 22, amplifies the power of the signal through the signal amplifier 23, and sends the signal to the interference signal transmitting antenna 11 to be sent out.
Specifically, the signal generator 21 is electrically connected to the industrial personal computer 40, and the industrial personal computer 40 adjusts the signal generator 21 according to the test requirement, so that the generated interference signal meets the test requirement.
Specifically, the signal generator 21 is preferably a swept signal generator 21, the signal amplitude of the interference signal generated by the signal generator 21 is constant, and the signal frequency is linearly changed with time; the signal filter 22 is configured to filter the interference signal, so that the signal frequency of the output interference signal meets the test requirement; the signal amplifier 23 is configured to power amplify the interference signal generated by the signal generator 21 so as to be transmitted through the interference signal transmitting antenna 11.
Further, the calibration device 30 includes a first spectrometer 31 and a second spectrometer 32, the input end of the first spectrometer 31 is electrically connected to the spectrum monitoring antenna 12, the input end of the second spectrometer 32 is electrically connected to the position measuring antenna 13, and the output ends of the first spectrometer 31 and the second spectrometer 32 are electrically connected to the industrial personal computer 40.
Specifically, the spectrum monitoring antenna 12 and the position measuring antenna 13 are configured to cover a full band for receiving an interference signal, and the first spectrometer 31 and the second spectrometer 32 are respectively configured to perform spectrum analysis on the interference signal received by the spectrum monitoring antenna 12 and the position measuring antenna 13, and send the interference signal to the industrial personal computer 40.
Specifically, the test shielding box 10 is configured to provide a sealed test space isolated from an external electromagnetic signal, the signal generating device 20 is disposed between the industrial personal computer 40 and the interference signal transmitting antenna 11, the signal generating device 20 sends the generated interference signal to the test shielding box 10 through the interference signal transmitting antenna 11, the first spectrometer 31 receives and identifies the interference signal through the spectrum monitoring antenna 12, the industrial personal computer 40 compares the spectrum of the interference signal received by the spectrum monitoring antenna 12 with the spectrum of the interference signal generated by the signal generating device 20, and the spectrum calibration of the anti-interference test device is completed by adjusting the parameter value of the signal generating device 20 to make the spectrum of the interference signal received by the spectrum monitoring antenna 12 coincide with the spectrum of the interference signal generated by the signal generating device 20.
Further, a first mobile platform 14 and a second mobile platform 15 are further disposed in the test shielding box 10, the first mobile platform 14 and the second mobile platform 15 are disposed on the same inner side wall or different inner side walls in the test shielding box 10, the interference signal transmitting antenna 11 and the spectrum monitoring antenna 12 are disposed on the first mobile platform 14, the position measuring antenna 13 is disposed on the second mobile platform 15, and the first mobile platform 14 and the second mobile platform 15 respectively drive the interference signal transmitting antenna 11, the spectrum monitoring antenna 12 and the position measuring antenna 13 to move.
Further, the first moving platform 14 includes a first slide rail, a first moving motor 141, a first position locking mechanism and an equipment mounting bracket, the first moving motor 141 is detachably mounted at one end of the first slide rail, the first moving motor 141 is used for driving the equipment mounting bracket to move along the first slide rail, the interference signal transmitting antenna 11 and the spectrum monitoring antenna 12 are mounted on the equipment mounting bracket in parallel, and the first position locking mechanism is used for locking the equipment mounting bracket, so that the position of the equipment mounting bracket after calibration is completed is not moved any more. The second moving platform 15 includes a second slide rail, a second moving motor 151, a second position locking mechanism and a device clamping jig, the second moving motor 151 is detachably mounted at one end of the second slide rail, the second moving motor 151 is used for driving the device clamping jig to move along the second slide rail, the position measuring antenna 13 is mounted on the device clamping jig, and the second position locking mechanism is used for locking the device clamping jig, so that the position of the device clamping jig after calibration is completed is not moved any more. The device clamping jig is characterized in that a swinging motor is arranged below the device clamping jig and used for swinging the device clamping jig at a preset angle so as to simulate the state of the device to be tested in use.
Further, the first moving motor 141, the second moving motor 151 and the swing motor are connected to the industrial personal computer 40, and the industrial personal computer 40 issues operation instructions to the first moving motor 141, the second moving motor 151 and the swing motor, respectively.
Specifically, after the spectrum calibration of the anti-interference test device is completed, the second spectrometer 32 receives and identifies the interference signal through the position measurement antenna 13, the industrial personal computer 40 compares the interference signal spectrum received by the position measurement antenna 13 with the interference signal spectrum generated by the signal generating device 20, and adjusts the positions of the interference signal transmitting antenna 11 and the position measurement antenna 13 through the first mobile motor 141 and the second mobile motor 151 respectively, so that the interference signal spectrum received by the spectrum monitoring antenna 12 is consistent with the interference signal spectrum generated by the signal generating device 20, and the antenna position calibration of the anti-interference test device is completed.
After the calibration of the antenna position of the anti-interference test device is completed, the position of the device mounting bracket is locked through the first position locking mechanism, so that the positions of the interference signal transmitting antenna 11 and the frequency spectrum monitoring antenna 12 are not moved any more, and the first mobile motor 141 is dismounted; the second position locking mechanism locks the position of the position measuring antenna 13, so that the position of the position measuring antenna 13 is not moved any more, and the second moving motor 151 is removed.
After the calibration of the antenna position of the anti-interference test device is completed, the positions of the first mobile platform 14 and the second mobile platform 15 are fixed and are not changed.
Specifically, in the present embodiment, when performing antenna position calibration, the first moving platform 14 moves the interference signal transmitting antenna 11 and the spectrum monitoring antenna 12 to the center position of the test shielding box 10.
Firstly, spectrum calibration of the anti-interference test device is performed, after the spectrum calibration is completed, the fine adjustment parameter value of the signal generating device 20 is recorded, and at this time, the interference signal received by the spectrum monitoring antenna 12 is a standard interference signal.
And then calibrating the antenna position, adjusting the first mobile platform 14 and the second mobile platform 15 to enable the interference signal spectrum received by the position measurement antenna 13 to be consistent with the standard interference signal spectrum, and recording the absolute positions of the first mobile platform 14 and the second mobile platform 15, wherein at the moment, the absolute positions of the first mobile platform 14 and the second mobile platform 15 are the installation positions of the interference signal transmitting antenna 11 and the equipment to be tested when the equipment is measured.
Further, the test shielding box 10 includes an upper half box body and a lower half box body, the upper half box body is movably connected with the lower half box body through a connecting piece, and after the upper half box body and the lower half box body are covered, a closed test cavity is formed inside the test shielding box 10.
Further, the test shielding case 10 employs a wave absorbing material to reduce interference of electromagnetic waves inside and outside the test shielding case 10.
Specifically, the test shielding box 10 is configured to ensure isolation between the test environment inside the box and the external electromagnetic environment, so that the test environment is relatively independent, and thus, the influence of the external electromagnetic signal on the internal test environment is reduced.
Specifically, the wave absorbing material can absorb or substantially attenuate electromagnetic wave energy received at the surface of the test shielded enclosure 10, thereby reducing electromagnetic wave interference. In engineering application, the wave absorbing material not only has higher absorptivity to electromagnetic waves in a wider frequency band, but also has the performances of light weight, temperature resistance, moisture resistance, corrosion resistance and the like, so that the inner space of the test shielding box 10 body forms a closed test environment.
In the above-mentioned calibration device 100 for anti-interference test equipment, the industrial personal computer 40 controls the signal generating device 20 to generate an interference signal, and transmits the interference signal through the interference signal transmitting antenna 11, after the spectrum monitoring antenna 12 receives the interference signal, the received interference signal is sent to the industrial personal computer 40 through the calibration device 30, and the industrial personal computer 40 performs fine tuning on the signal generating device 20, so that the interference signal received by the calibration device 30 and the interference signal generated by the signal generating device 20 tend to be consistent; the position measuring antenna 13 receives the interference signal, the received interference signal is sent to the industrial personal computer 40 through the calibration device 30, and the positions of the position measuring antenna 13 and the interference signal transmitting antenna 11 are adjusted to enable the interference signal received by the calibration device 30 to be consistent with the interference signal transmitted by the interference signal transmitting antenna 11; after the calibration of the anti-interference test equipment is completed, the accuracy of the test result of the anti-interference test equipment is improved, so that the anti-interference test equipment can provide a standard test environment, the test results of the same wireless signal received in different anti-interference test equipment are the same, and the consistency of the products of the anti-interference test equipment is ensured. The calibration device is easy to operate, the whole calibration process is simple and quick, and the measurement accuracy of the anti-interference test equipment after calibration is high. The product of the utility model has simple structure, easy production, low cost and convenient popularization.
It should be noted that the present utility model is not limited to the above embodiments, and those skilled in the art can make other changes according to the inventive spirit of the present utility model, and these changes according to the inventive spirit of the present utility model should be included in the scope of the present utility model as claimed.
Claims (10)
1. The utility model provides an anti-interference test equipment calibrating device for anti-interference test equipment's frequency spectrum calibration and antenna position calibration, its characterized in that includes test shielding case, signal generating device, calibration equipment and industrial computer:
the test shielding box is used for simulating a wireless signal transmission environment, so that an anti-interference test of the wireless receiving equipment is not interfered by external electromagnetic signals;
the industrial personal computer is connected to the signal generating equipment and the calibration equipment and is used for generating parameter values of interference signals generated by the signal generating equipment so that the interference signals meet the test requirements;
the signal generating equipment is used for generating a target interference frequency spectrum according to the parameter value output by the industrial personal computer and sending out the target interference frequency spectrum through the interference signal transmitting antenna;
the calibration device is used for analyzing the interference signals received by the frequency spectrum monitoring antenna and the position measuring antenna so as to obtain the interference signal frequency spectrum in the test shielding box.
2. The calibration device for anti-interference test equipment according to claim 1, wherein the signal generating equipment comprises a signal generator, a signal filter and a signal amplifier which are sequentially connected, a control end of the signal generator is connected to the industrial personal computer, an output end of the signal amplifier is connected to the interference signal transmitting antenna, the signal generator generates a target interference frequency spectrum, noise in a signal is filtered by the signal filter, and the signal is transmitted to the interference signal transmitting antenna for transmission after being amplified by the signal amplifier.
3. The device for calibrating an anti-interference test apparatus according to claim 1, wherein the calibration apparatus comprises a first spectrometer and a second spectrometer, an input end of the first spectrometer is electrically connected to the spectrum monitoring antenna, an input end of the second spectrometer is electrically connected to the position measuring antenna, and output ends of the first spectrometer and the second spectrometer are electrically connected to the industrial personal computer.
4. The anti-interference test equipment calibration device according to claim 1, wherein a first mobile platform and a second mobile platform are further arranged in the test shielding box, the first mobile platform and the second mobile platform are arranged on the same inner side wall or different inner side walls in the test shielding box, the interference signal transmitting antenna and the frequency spectrum monitoring antenna are arranged on the first mobile platform, the position measuring antenna is arranged on the second mobile platform, and the first mobile platform and the second mobile platform respectively drive the interference signal transmitting antenna, the frequency spectrum monitoring antenna and the position measuring antenna to move.
5. The tamper resistant test equipment calibration device of claim 4, wherein the first mobile platform comprises a first slide rail, a first mobile motor, a first position locking mechanism and an equipment mounting bracket, wherein the first mobile motor is detachably mounted at one end of the first slide rail, the first mobile motor is used for driving the equipment mounting bracket to move along the first slide rail, the interference signal transmitting antenna and the spectrum monitoring antenna are mounted on the equipment mounting bracket in parallel, and the first position locking mechanism is used for locking the equipment mounting bracket so that the position of the equipment mounting bracket after calibration is completed is not moved any more.
6. The device for calibrating anti-interference test equipment according to claim 5, wherein the second moving platform comprises a second sliding rail, a second moving motor, a second position locking mechanism and an equipment clamping jig, the second moving motor is detachably mounted at one end of the second sliding rail, the second moving motor is used for driving the equipment clamping jig to move along the second sliding rail, the position measuring antenna is mounted on the equipment clamping jig, and the second position locking mechanism is used for locking the equipment clamping jig, so that the position of the equipment clamping jig after calibration is not moved any more.
7. The anti-interference test equipment calibration device according to claim 6, wherein a swing motor is arranged below the equipment clamping jig, and the swing motor is used for swinging the equipment clamping jig at a predetermined angle so as to simulate the state of equipment to be tested in use.
8. The tamper resistant test equipment calibration device of claim 7, wherein the first mobile motor, the second mobile motor, and the swing motor are connected to the industrial personal computer, and the industrial personal computer issues operation instructions to the first mobile motor, the second mobile motor, and the swing motor, respectively.
9. The device for calibrating anti-interference test equipment according to claim 1, wherein the test shielding box comprises an upper half box body and a lower half box body, the upper half box body and the lower half box body are movably connected through a connecting piece, and after the upper half box body and the lower half box body are covered, a closed test cavity is formed inside the test shielding box.
10. The tamper resistant test equipment calibration device of claim 1, wherein said test shielded enclosure is of wave absorbing material to reduce electromagnetic wave interference inside and outside said test shielded enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221647691.0U CN218896194U (en) | 2022-06-29 | 2022-06-29 | Calibration device for anti-interference test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221647691.0U CN218896194U (en) | 2022-06-29 | 2022-06-29 | Calibration device for anti-interference test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218896194U true CN218896194U (en) | 2023-04-21 |
Family
ID=85996704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221647691.0U Active CN218896194U (en) | 2022-06-29 | 2022-06-29 | Calibration device for anti-interference test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218896194U (en) |
-
2022
- 2022-06-29 CN CN202221647691.0U patent/CN218896194U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN218240424U (en) | Anti-interference testing device | |
| CN104569635B (en) | Wireless terminal antenna performance test system | |
| US7286961B2 (en) | Method and an apparatus for measuring the performance of antennas, mobile phones and other wireless terminals | |
| CN103616575B (en) | A kind of radiation emission test method | |
| CN219421037U (en) | Position calibration device for test antenna | |
| CN110702999A (en) | Strong electromagnetic pulse shielding effectiveness test system and method | |
| CN106992798B (en) | Passive intermodulation test method based on slot waveguide near-field coupling | |
| CN106886002B (en) | Calibration method of spectrum analyzer | |
| CN218896194U (en) | Calibration device for anti-interference test equipment | |
| CN115267356A (en) | Boundary deformation cross coupling reverberation chamber shielding effectiveness testing device and method | |
| CN112558001B (en) | Pulse high-power field calibration device and method | |
| CN218896195U (en) | Anti-interference test equipment radio frequency spectrum error calibration device | |
| CN218243533U (en) | Wireless transmission signal anti-interference test equipment | |
| CN115201737A (en) | Calibration method of wireless transmission signal anti-interference test equipment | |
| JP2006208019A (en) | Electromagnetic wave coupling apparatus | |
| CN115032465A (en) | Radiation stray determination method, device and system | |
| CN218243532U (en) | Anti-interference test radio frequency device | |
| CN103592521B (en) | A kind of on-the-spot railway roadbed environment is to the method for testing of transponder frequency influence and system | |
| CN110673076B (en) | Frequency response calibration device and method for pulse electric field measurement system | |
| CN211626415U (en) | Rotor and stator axial clearance on-line measuring device based on microwave | |
| CN108650031B (en) | Microwave component weak passive intermodulation test system and method based on cancellation technology | |
| Li et al. | Measurement of Nonlinear Harmonic Signals Generated in SAW Resonators on 42° YX-LiTaO 3 Substrate Using Spectrum Analyzer | |
| RU212715U1 (en) | SEW CONTROL DEVICE | |
| CN215005624U (en) | Near-field measurement auxiliary device | |
| CN111141376A (en) | Ultrasonic wave interference phenomenon demonstration and sound velocity measurement device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |