Antenna system

Details Antenna system Antenna system

1989-10-13

1991-02-19

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including antenna pattern plotting

342372, 343703, H01Q 300, H01Q 322

Patent

active

049948130

ABSTRACT:
A phased array antenna includes a plurality of first antenna elements and a plurality of phase shifters respectively connected to the first antenna elements. An amplitude and a phase of each of the antenna elements are determined by a method of opposing a pick-up antenna at a distance from the phased array antenna to measure a composite power of the phased array antenna while changing phases of the phase shifters for determining the ratio of the maximum power to the minimum power, and the phase value for the maximum power, from which the amplitude and phase are computed. A second antenna element is incorporated in the phased array antenna as a pick-up antenna to measure with mutual coupling an amplitude and a phase of each antenna element by the method and to determine differences in amplitude and phase between the opposed pick-up antenna and the second antenna element so that an amplitude and a phase subsequently measured with the second antenna element are corrected with the differences in amplitude and phase to determine an amplitude and a phase of each antenna element.

REFERENCES:
Chiba et al., "An Improved Method for Measuring Amplitude and Phase of Each Radiating Element of a Phased Array Antenna", '82/5 vol. J65-B, No. 5, pp. 555-560.

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