Planar antenna having adjustable mounting portion

摘要

A planar antenna (1) includes a radiation portion (3) and a ground portion (2). The radiation portion includes a printed circuit board (31) and radiating elements (32) disposed on one surface of the printed circuit board. The ground portion includes a horizontal plate secured on an end portion of the printed circuit board and two side walls (23, 24) extending vertically from the horizontal plate. A long and narrow through hole (21) is defined in the horizontal plate with two semicircumferential edges and two straight edges between the two semicircumferential edges. One end of the horizontal plate fixed on one end of the printed circuit board.