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Antenna near-field no-phase measurement method

A phase measurement and antenna technology, applied in directions such as antenna radiation patterns, can solve the problems of high cost of vector equipment, large phase measurement errors, and restriction of the use of near-field measurement technology, so as to reduce system measurement costs and avoid vector measurement equipment.

Inactive Publication Date: 2017-12-19
BEIHANG UNIV
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Problems solved by technology

With the development of 5G communication and terahertz technology, the operating frequency of the antenna is getting higher and higher. In the case of high frequency, the cost of vector equipment that directly measures the phase is high; The test cable is more sensitive to the jitter that occurs with the movement of the probe and the mechanical positioning accuracy of the probe, and the measurement error of the phase is larger, especially for the measurement of millimeter wave / submillimeter wave and terahertz antennas, which brings great pressure to the traditional near-field measurement method. There are two challenges in cost and technology, which seriously restrict the use of traditional near-field measurement technology in the high frequency band

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  • Antenna near-field no-phase measurement method
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  • Antenna near-field no-phase measurement method

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings and through specific examples.

[0054] Such as image 3 Shown is the simulation model diagram of antenna near-field phase-free measurement, in which 31 is the antenna to be tested, 32 is the reference antenna, the working frequency is 15GHz, the antenna to be tested is a Ku-band 20dB standard gain horn, and the reference antenna is an open straight waveguide in the Ku-band , using the MOM method to simulate and calculate. The center of the aperture surface of the antenna to be tested is located at coordinates (0, 0, 0), the off-axis layout of the reference antenna is located at coordinates (283mm, 283mm, 0mm), and the aperture surfaces of the two antennas are on the same plane (see figure 2 ), the near-field scanning probe measures the amplitude value of the equally spaced isolated scatter points on a plane distanced from the antenna aperture d=210mm to be measured, th...

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Abstract

The invention discloses an antenna near-field no-phase measurement method, wherein multiple near fields of a to-be-measured antenna can be accurately reconstructed through measuring an electric field amplitude value of a near-field scanning surface without direct measurement of phase information, and furthermore a far field directional diaphragm characteristic of the to-be-measured antenna is obtained. The antenna near-field no-phase measurement method aims to overcome the influence of the phase error to a measurement result in traditional near-field amplitude and phase measurement in a high-frequency working condition, and is a low-cost high-precision solution for near field measurement and aperture field diagnosis of high-frequency working antennae such as millimeter wave / submillimeter wave antenna and tera-hertz antenna.

Description

technical field [0001] The antenna near-field phase-free measurement method involved in the present invention can accurately obtain the far-field pattern of the antenna to be tested by only measuring the amplitude value of the radiation field. The invention can effectively reduce the influence of signal source phase drift, probe mechanical positioning error and test cable jitter on phase measurement, overcome the influence of phase error on far-field measurement results in traditional near-field measurement, and is suitable for millimeter wave / submillimeter wave Near-field measurement and aperture field diagnosis of high-frequency working antennas such as , terahertz, etc. Background technique [0002] Antenna testing capability is the guarantee of electronic system research and development. Efficient and accurate testing and diagnosis can greatly shorten the product development cycle. Compared with far-field and compact-field technology, near-field technology has the advan...

Claims

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Application Information

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IPC IPC(8): G01R29/10
CPCG01R29/10
Inventor 李志平霍鹏武建华王正鹏
Owner BEIHANG UNIV
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