APPARATUS FOR MEASURING ELECTRICAL CHARACTERISTICS OF ARRAY ANTENNA

摘要

PROBLEM TO BE SOLVED: To measure input impedance values or far-field directivity of an array antenna and to calculate respective admittance values among antenna elements, on the basis of the measured values.;SOLUTION: A prescribed nominal reactance value and first/second deviation reactance values defined by the variations from the nominal reactance value are set to each of variable reactance elements 12-m connected to a passive element Am of an array antenna device 100, and a plurality of input impedance values of the array antenna device 100 are measured. Then, a plurality of variable transformation admittance values are calculated on the basis of the respective measured input impedance values, by using a relational expression which relates to the plurality of variable transformation admittance values and is subjected to a variable transforming processing so as to include respective input impedance values, the first/second deviation reactance values, the nominal reactance value, and the admittance values between respective antenna elements A0-A6 of the array antenna. Respective admittance values between the antenna elements A0-A6 are calculated, by subjecting respective calculated variable transformed admittance values to inverse variable transformation.;COPYRIGHT: (C)2005,JPO&NCIPI