MULTI-PLANE ARRANGEMENT NONDIRECTIONAL ANTENNA

摘要

PROBLEM TO BE SOLVED: To realize a multi-plane arrangement nondirectional antenna which can realize non-directivity with a small quantity of ruggedness in a wide frequency range and also prevents a direction in which a gain mountain can be made and a direction in which a gain valley can be made from being replaced with each other. SOLUTION: Fourteen planes of panel antennas provided with two antenna elements 3a and 3b are prepared and arranged outwardly on the circumference, and power feeding is also performed with 90 deg. phase difference applied to each adjacent antenna element. A power feeding circuit is constructed by using a two-input and two-output type hybrid circuit 7 and 180 deg. phase shifters 8 and 9.