PLANAR ANTENNA APPARATUS AND DIRECTIVITY CONTROL METHOD OF PLANAR LOOP ANTENNA

摘要

PROBLEM TO BE SOLVED: To appropriately control antenna directivity into desired direction regardless of the direction of a sheet-like dielectric on which a planar loop antenna is installed.;SOLUTION: A planar loop antenna 12 is provided which is mounted on sheet-like window glass 14 and comprised of an antenna element 16 and a truncated ground plane 18. The length of the truncated ground plane 18 is controlled in the direction opposite to the side of the antenna element 16 in a view from a power feeding point 20 on the window glass 14, thereby controlling the antenna radiation direction of the planar loop antenna 12.;COPYRIGHT: (C)2007,JPO&INPIT