Direction chart measuring system and method suitable for antenna in half-space environment

Abstract

The invention discloses a direction chart measuring system and method suitable for an antenna in half space environment. The direction chart measuring system and method suitable for the antenna in thehalf space environment comprises a carrier platform, and a to-be-test antenna, and a positioning measuring apparatus; the to-be-test wire on the carrier platform is located in the half space environment, and signals used for measuring is radiated by the to-be-tested antenna; the positioning measuring apparatus is used for measuring electric field information of the to-be-test wire on the near field hemispherical surface with a specific semi-diameter, based on the electric field information, spherical surface wave expansion coefficient is obtained through a spherical surface near and far fieldtransformation algorithm, and a radiation pattern is obtained according to the spherical surface wave expansion coefficient; and compared with traditional microwave anechoic chamber measurement, andaccording to the direction chart measuring system and method suitable for the wire in the half space environment, the antenna near field measuring in outer field environment (for example, ground) is conducted so that electromagnetic radiation measurement can be conducted to the to-be-tested antenna in a real environment, a research is conducted to an actual working state of the wire, and the measuring system and method has a great engineering value.

Description

technical field [0001] The invention relates to the technical field of microwave measurement, in particular to a system and method for measuring the pattern of an antenna in a half-space environment. Background technique [0002] Antenna measurement is accompanied by antenna design, and is an important means to guide antenna design and verify antenna performance; antenna measurement technology mainly includes far-field measurement and near-field measurement. For near-field measurement of antennas, the principle is to At a distance of several wavelengths from the antenna under test, use a probe with known electrical characteristics to scan and measure the amplitude and phase data of the electromagnetic field on the spherical surface of the near field of the antenna under test, and then calculate the far field characteristics of the antenna under test through mathematical transformation. [0003] Most of the existing antenna near-field measurement methods use traditional micro...

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Problems solved by technology

However, the traditional microwave anechoic chamber measurement also has shortcomings. The antenna measurement in the microwave anechoic chamber only considers the radiation characteristics of the antenna and the carrier platform (such as: vehicle), and usually does not consider the electromagnetic influence of the external field environment (such as: the ground) where the actual carrier platform is located.

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