An integrated antenna system with circularly polarized the patch antenna and vertically polarized a planar antenna

摘要

PROBLEM TO BE SOLVED: To provide a compound antenna which is formed by combining a circularly polarized wave antenna with a vertically polarized wave antenna, is suitable for making its own size smaller and thinner and has high reliability.;SOLUTION: A flat antenna 11 for ground waves is fixed to a printed circuit board 10, and a two-point feeding system patch antenna 12 for satellite waves is mounted and fixed to the metal plate 14 of the flat antenna 11. The flat antenna 11 has one feeding terminal 16 and six grounding terminals 15 arranged at equal intervals. The patch antenna 12 has feeding pins 23 and 24 at two places which are at an equal distance from the center of a patch electrode 21 and separated at 90°, and the feeding pins 23 and 24 are connected to a 90° phase-difference circuit by utilizing an opening 13 of the flat antenna 11. The relative positional relation of the metal plate 14 and the patch electrode 21 is almost constant along a circumferential direction. The feeding terminal 16, a group of the grounding terminals 15 and the feeding pins 23 and 24 are provided in a prescribed relative positional relation that corrects directional distortion caused by electromagnetic coupling, etc.;COPYRIGHT: (C)2005,JPO&NCIPI