CN112834830A - Antenna near-field coupling measurement device and method - Google Patents
Antenna near-field coupling measurement device and method Download PDFInfo
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- CN112834830A CN112834830A CN202110159639.4A CN202110159639A CN112834830A CN 112834830 A CN112834830 A CN 112834830A CN 202110159639 A CN202110159639 A CN 202110159639A CN 112834830 A CN112834830 A CN 112834830A
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- antenna
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
- G01R29/105—Radiation diagrams of antennas using anechoic chambers; Chambers or open field sites used therefor
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses an antenna near-field coupling measuring device and method. The measuring device comprises an electromagnetic shielding cover, an electromagnetic wave absorbing material, a broadband antenna, a high-frequency interface, a positioning and mounting accessory and a transceiving processing assembly; the electromagnetic wave absorbing material is arranged in the electromagnetic shielding cover, the broadband antennas are multiple and are arranged on the inner ring of the electromagnetic wave absorbing material, the high-frequency interface is used for being connected with the receiving and transmitting processing assembly, and the positioning and mounting accessory is used for fixing the electromagnetic shielding cover at the position of the antenna to be tested. In the measuring method, an equivalent microwave darkroom conformal to the antenna to be measured is constructed by an electromagnetic shielding cover and an electromagnetic wave-absorbing material, and electromagnetic wave energy received by a broadband antenna is received by a high-frequency interface and is forwarded to a receiving-transmitting processing assembly. The technical scheme disclosed by the invention improves the accuracy and the rapid detection capability of performance detection.
Description
Technical Field
The present invention relates to an antenna near-field coupling measurement apparatus and method, and more particularly, to an apparatus and method for near-field coupling measurement of a radio device.
Background
In the prior art, common indexes of a radio system include sensitivity, transmission power, bit error rate, frequency accuracy, frequency stability, signal bandwidth, adjacent channel rejection, distortion degree, time delay and the like, and for the system-level performance of airborne communication equipment, two most important indexes which may change in use are reception sensitivity and transmission power, which directly determine the communication distance and communication quality of the system, but radio signals pass through more links, including spatial propagation loss of a receiving and transmitting antenna feeder line, and cannot be directly obtained through an instrument. The test of the spatial propagation loss is closely related to the field distribution of the antenna, and according to the engineering practice, the field of the antenna can be roughly divided into a near field and a far field (also called a Fernary field), and the boundary of the field is fuzzy. The near field can be divided into an inductive near field (also called reactance region) and a radiating near field (also called fresnel region).
The near field test has the advantages of small test distance, less interference from external environment, high precision, no weather influence, all-weather test and the like. Importantly, various electromagnetic environments can be simulated, and errors existing in measurement are effectively compensated through accurate mathematical calculation, so that the measurement with higher accuracy and larger field is better, and more attention and applications are paid.
The near field scanning method has obvious advantages compared with other testing techniques after long-term development for decades, and is widely applied to practical engineering. The near field scanning method is a method for performing plane, cylindrical or spherical sampling scanning on a test antenna in a near field area by using a probe with known characteristics and solving the far field characteristics of the antenna by using a mathematical transformation mode according to a sampling theorem. However, the near-field measurement method requires scanning test of the test surface by using a probe in a microwave darkroom, and has high measurement environment requirement and long measurement time.
Therefore, how to realize a near-field rapid and accurate measurement radio device is a difficult problem to be solved by the existing near-field measurement.
Disclosure of Invention
The invention aims to disclose an antenna near-field coupling measuring device and method so as to improve the measuring accuracy and the rapid detection capability.
In order to achieve the purpose of the invention, the invention provides an antenna near-field coupling measuring device. The device comprises an electromagnetic shielding cover, an electromagnetic wave absorbing material, a broadband antenna, a high-frequency interface, a positioning and mounting accessory and a transceiving processing assembly; the electromagnetic wave absorbing material is arranged in the electromagnetic shielding cover, the broadband antennas are multiple and are arranged on the inner ring of the electromagnetic wave absorbing material, the high-frequency interface is used for being connected with the receiving and transmitting processing assembly, the positioning and mounting accessory is used for fixing the electromagnetic shielding cover at the position of the antenna to be tested, and the receiving and transmitting processing assembly is used for processing the received signals to obtain index parameters of the equipment to be tested.
Further, in the technical scheme disclosed by the invention, the electromagnetic shielding cover adopts nickel cupronickel or copper albedo which is easy to bend and stretch as a shielding frame material, and the seam and the edge are sealed by using a conductive adhesive tape.
Further, in the technical scheme disclosed by the invention, the electromagnetic wave-absorbing material adopts a pyramid type series wave-absorbing material.
Further, in the technical scheme disclosed by the invention, the broadband antenna adopts a microstrip slot antenna and is uniformly arranged at equal intervals on the inner ring of the electromagnetic wave-absorbing material.
In order to achieve the purpose of the invention, the invention provides an antenna near-field coupling measurement method. In the method, an equivalent microwave darkroom conformal to the antenna to be tested is constructed by an electromagnetic shielding cover and an electromagnetic wave-absorbing material, electromagnetic wave energy received by a broadband antenna is received by a high-frequency interface and is forwarded to a transceiving processing component, and the transceiving processing component obtains performance parameters of the device to be tested by adopting a time-frequency analysis method.
Compared with the prior art, the invention has the following beneficial effects:
in the technical scheme disclosed by the invention, the conformal equivalent microwave anechoic chamber of the antenna to be detected is constructed by the electromagnetic shielding cover and the electromagnetic wave-absorbing material, the electromagnetic wave energy received by the broadband antenna is received by the high-frequency interface and is forwarded to the receiving-transmitting processing assembly, and the performance detection of the equipment to be detected is realized. In the prior art, the near-field measurement method needs to scan and test a test surface by using a probe in a microwave darkroom, and has high measurement environment requirement and long measurement time. Compared with the prior art, the technical scheme disclosed by the invention realizes the rapid in-situ performance test.
Additional advantages and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
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Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
In the prior art, a near field scanning method has obvious advantages compared with other testing technologies after long-term development for decades, and is widely applied to practical engineering. The near field scanning method is a method for performing plane, cylindrical or spherical sampling scanning on a test antenna in a near field area by using a probe with known characteristics and solving the far field characteristics of the antenna by using a mathematical transformation mode according to a sampling theorem. However, the near-field measurement method requires scanning test of the test surface by using a probe in a microwave darkroom, and has high measurement environment requirement and long measurement time.
In order to solve the problems in the prior art, the embodiment of the invention discloses an antenna near-field coupling measuring device. The device comprises an electromagnetic shielding cover, an electromagnetic wave absorbing material, a broadband antenna, a high-frequency interface, a positioning and mounting accessory and a transceiving processing assembly; the electromagnetic wave absorbing material is arranged in the electromagnetic shielding cover, the broadband antennas are multiple and are arranged on the inner ring of the electromagnetic wave absorbing material, the high-frequency interface is used for being connected with the receiving and transmitting processing assembly, the positioning and mounting accessory is used for fixing the electromagnetic shielding cover at the position of the antenna to be tested, and the receiving and transmitting processing assembly is used for processing the received signals to obtain index parameters of the equipment to be tested.
Further, in the technical solution disclosed in the embodiment of the present invention, the electromagnetic shielding cover uses nickel cupronickel or copper white as a shielding frame material, which is easy to bend and stretch, and the seam and the edge are sealed by using a conductive adhesive tape.
Further, in the technical scheme disclosed by the embodiment of the invention, the electromagnetic wave-absorbing material adopts pyramid-shaped series wave-absorbing materials.
Further, in the technical scheme disclosed by the embodiment of the invention, the broadband antenna adopts a microstrip slot antenna and is uniformly and equally spaced on the inner ring of the electromagnetic wave-absorbing material.
In order to realize the rapid and accurate measurement of the device to be measured, the embodiment of the invention also discloses an antenna near-field coupling measurement method. In the method, an equivalent microwave darkroom conformal to the antenna to be tested is constructed by an electromagnetic shielding cover and an electromagnetic wave-absorbing material, electromagnetic wave energy received by a broadband antenna is received by a high-frequency interface and is forwarded to a transceiving processing component, and the transceiving processing component obtains performance parameters of the device to be tested by adopting a time-frequency analysis method.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and examples shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (5)
1. An antenna near-field coupling measuring device is characterized by comprising an electromagnetic shielding cover, an electromagnetic wave absorbing material, a broadband antenna, a high-frequency interface, a positioning installation accessory and a transceiving processing assembly; the electromagnetic wave absorbing material is arranged in the electromagnetic shielding cover, the broadband antennas are multiple and are arranged on the inner ring of the electromagnetic wave absorbing material, the high-frequency interface is used for being connected with the receiving and transmitting processing assembly, the positioning and mounting accessory is used for fixing the electromagnetic shielding cover at the position of the antenna to be tested, and the receiving and transmitting processing assembly is used for processing the received signals to obtain index parameters of the equipment to be tested.
2. The antenna near-field coupling measurement device of claim 1, wherein the electromagnetic shielding case is made of nickel cupronickel or cupronickel which is easy to bend and stretch, and is sealed at seams and edges by using conductive tapes.
3. The antenna near-field coupling measurement device of claim 1, wherein the electromagnetic wave-absorbing material is a pyramid-shaped series wave-absorbing material.
4. The antenna near-field coupling measurement device of claim 1, wherein the broadband antenna is a microstrip slot antenna and is uniformly and equally spaced at an inner ring of the electromagnetic wave-absorbing material.
5. The antenna near-field coupling measurement method is characterized in that a conformal equivalent microwave anechoic chamber of an antenna to be measured is constructed through an electromagnetic shielding cover and an electromagnetic wave absorbing material, electromagnetic wave energy received by a broadband antenna is received through a high-frequency interface and forwarded to a transceiving processing component, and the transceiving processing component obtains performance parameters of equipment to be measured through a time-frequency analysis method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110159639.4A CN112834830A (en) | 2021-02-05 | 2021-02-05 | Antenna near-field coupling measurement device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110159639.4A CN112834830A (en) | 2021-02-05 | 2021-02-05 | Antenna near-field coupling measurement device and method |
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| CN112834830A true CN112834830A (en) | 2021-05-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721268A (en) * | 2021-08-17 | 2021-11-30 | 海波 | Antenna time delay calibration method |
| CN114583428A (en) * | 2022-04-29 | 2022-06-03 | 中国电子科技集团公司第三十八研究所 | Transmission wave-absorbing structure and antenna in-band characteristic test system |
| CN116209235A (en) * | 2023-05-05 | 2023-06-02 | 北京航天天美科技有限公司 | Performance optimization method of special cabinet with high reliability for military use |
| US11828781B2 (en) | 2022-04-29 | 2023-11-28 | 38Th Research Institute, China Electronics Technology Group Corporation | Transmission absorbing structure and antenna in-band characteristics test system |
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| CN212433285U (en) * | 2020-07-20 | 2021-01-29 | 广东圣大电子有限公司 | Stray radiation test system of radio frequency transmitter |
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2021
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| CN102857310A (en) * | 2012-07-27 | 2013-01-02 | 中兴通讯股份有限公司 | Test method and device for wireless indexes of active antenna system |
| CN103344846A (en) * | 2013-07-25 | 2013-10-09 | 成都雷电微力科技有限公司 | Scanning device for near-field test of antennas |
| CN105872162A (en) * | 2015-04-10 | 2016-08-17 | 深圳市通用测试系统有限公司 | Wireless terminal testing system and microwave darkroom |
| CN105352978A (en) * | 2015-11-26 | 2016-02-24 | 电子科技大学 | Handheld wave-absorbing material reflectivity measuring device |
| CN106597129A (en) * | 2017-01-12 | 2017-04-26 | 深圳市通用测试系统有限公司 | Microwave anechoic chamber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721268A (en) * | 2021-08-17 | 2021-11-30 | 海波 | Antenna time delay calibration method |
| CN114583428A (en) * | 2022-04-29 | 2022-06-03 | 中国电子科技集团公司第三十八研究所 | Transmission wave-absorbing structure and antenna in-band characteristic test system |
| CN114583428B (en) * | 2022-04-29 | 2022-07-12 | 中国电子科技集团公司第三十八研究所 | Transmission wave-absorbing structure and antenna in-band characteristic test system |
| US11828781B2 (en) | 2022-04-29 | 2023-11-28 | 38Th Research Institute, China Electronics Technology Group Corporation | Transmission absorbing structure and antenna in-band characteristics test system |
| CN116209235A (en) * | 2023-05-05 | 2023-06-02 | 北京航天天美科技有限公司 | Performance optimization method of special cabinet with high reliability for military use |
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