在菲涅耳区测量天线增益问题: About Antenna Gain Measurement in a Fresnel Zone.pdf

A method for calculating the measurement error of the directivity characteristics for a two-dimensional antenna placed in a
Fresnel zone is presented. The calculation method is based on replacement of a planar-area field with rays converging to an
observation point, by a convex-area field with parallel rays.

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