Near-field measurements on plane-polar facility
作者:
J.C.Bennett,
K.S.Farhat,
期刊:
IEE Proceedings H (Microwaves, Antennas and Propagation)
(IET Available online 1989)
卷期:
Volume 136,
issue 3
页码: 202-208
年代: 1989
DOI:10.1049/ip-h-2.1989.0038
出版商: IEE
数据来源: IET
摘要:
Among the geometries used for acquiring the near-fields of microwave antennas, the plane-polar geometry is the most recent. This contribution describes far-field predictions obtained on a recently built plane-polar facility. The procedure for the transformation of the near-field to the far-field uses a fast algorithm for the calculation of the radiation integral and is presented in the form of a cross correlation which is carried out using the fast Fourier transform. Predictions of the far-field patterns of two antennas are shown. A numerical algorithm for the interpolation of the near-field from the plane-polar grid to the cartesian grid is derived and the interpolated data is used to predict the far-field patterns of the two antennas. A direct result of the interpolation to a cartesian grid is the adaptability of the near-field to processing for antenna metrology, enabling the surface diagnosis of antennas under test from measured plane-polar data. A technique for phase drift compensation is presented and verified. The phase drift compensation procedure is particularly suited for the plane-polar geometry.
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