Antenna efficiency measuring device

Abstract

Abstract PURPOSE:To measure the efficiency of an antenna without any relation with a radiation pattern by moving a moving antenna while at least one of a fixed antenna and the moving antenna is revolving. CONSTITUTION:While keeping fixed by a revolving device an antenna 6 is moved along a course 7 and measures the propagation loss owing to a reflection wave between a sending antenna 6 and an auxiliary antenna 5 in various routes in multiple times. The antenna efficiency is found by comparing a statistic amount of the values obtained from these with the same statistic amount of the reference antenna. At this time, the contribution to the measuring population by parts 6-11-6-18 of the propragation due to a direct wave above the course comes to always constant, and the antenna efficiency computed by this measuring value population is proportional to the power rediated by the antenna 6 and the antenna efficiency as defined can be attained. Thus, a difficult investigation in selecting a course that does not contain the propagation part due to the direct wave becomes needless.

Inventors

• 👤 Hidehiro Takahashi

Bibliographic Details