A low-cost planar near-field/far-field antenna measurement system.

摘要

In this thesis, a low cost planar near-field/far-field (NF/FF) antenna measurement system is designed, built and validated in Center for Cold Ocean Research Engineering (C-CORE), Memorial University of Newfoundland. The design of the system is presented in detail, a faster technique is used to speed the determination of the far-field radiation pattern. The basic theory of near-field antenna measurements is reviewed. A software package has been designed which has a user friendly interface. Details of the NF/FF transformation using fourier transform are presented. Far-field radiation patterns calculated from near-field measurements have been compared with the far-field patterns measured directly inside C-CORE's RF anechoic chamber, and reasonably accurate results are observed for a number of antennas. Based on the cost of the system ({dollar}2,000), the reasonably accurate results are quite acceptable. This NF/FF measurement system is an addition to the Memorial University electromagnetic measurement facility.