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A Near Field Antenna Measurement Method for Arbitrary Curved Surface Scanning

A measurement method and technology for near-field antennas, applied in directions such as antenna radiation patterns, can solve problems such as complex algorithms, inability to target any scanning plane, and complicated programming, and achieve the effect of easy implementation and simple and convenient near-far field transformation.

Active Publication Date: 2019-08-20
KUNSHAN HAMILTON COMM TECH CO LTD
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Problems solved by technology

Its formula involves the spherical Hankel function, associated Legendre polynomials, and a large number of trigonometric functions, so the calculation and analysis are more complicated
[0005] It can be seen that the near-far field transformation algorithms in the existing near-field measurement methods can only be used for three typical scanning surfaces, but not for any scanning surface, and these algorithms are often complicated and very cumbersome to program

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  • A Near Field Antenna Measurement Method for Arbitrary Curved Surface Scanning
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  • A Near Field Antenna Measurement Method for Arbitrary Curved Surface Scanning

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0037] A near-field antenna measurement method for arbitrary curved surface scanning, comprising the following operations:

[0038] 1) Place the antenna to be tested on the turntable, and use a movable probe in the microwave anechoic chamber to measure the near-field electric field on a surrounding surface of the antenna;

[0039] At the beginning of the measurement the turntable is at degrees, the probe moves along the set trajectory The direction starts to scan, and the electric field is measured every Δθ degree, including direction components and The component of the direction, the first data sampling is completed after the probe moves to the end of the motion track; then the turntable rotates According to the same measurement method, the probe follows the motion track to complete...

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Abstract

The invention discloses a near-field antenna measurement method for any curved surface scanning. An antenna and a movable probe are driven to rotate through a rotary round table to perform scanning, and circular, linear and any curved surface motion ways can be adopted, so that the near-field test method can be suitable for any curved surface scanning; a scanning surface is not limited to a plane, a cylindrical surface or a spherical surface, and any curved surface can be adopted; various antennas can be measured. In the near-field antenna measuring method for any curved surface scanning, sampling points are taken as a plurality of points which are uniformly distributed in a parameter space, and then electric fields of any point are calculated through bilinear interpolation, so that a far electric field of the antenna can be calculated according to a Huygens equivalence principle, and near-field to far-field transformation is simple, convenient and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of microwave measurement, and relates to a near-field antenna measurement method for arbitrary curved surface scanning. Background technique [0002] Antenna measurement techniques mainly include far-field measurement, compact field measurement and near-field measurement. Far-field measurement is a very mature technology, but its disadvantage is that it cannot measure the three-dimensional pattern of the antenna, often requires a large external field, is susceptible to external interference, and has low confidentiality. The compact field measurement is a method of simulating the far-field test by converting the spherical wave emitted by the feed source into a plane wave through a collimation element within a short distance. The equipment operation and maintenance costs of compact field measurement are high, the error analysis is very complicated and difficult to correct, and the space utilization rate is no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/10
Inventor 侯建强袁浩波
Owner KUNSHAN HAMILTON COMM TECH CO LTD
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