Antenna apparatus and wireless apparatus and radio relaying apparatus using the same

摘要

Antenna elements (1) to (4) are arranged at both ends in a diamond shape, and are located opposite to each other, while a length (a) of one edge of this diamond shape is set to a ½ wavelength (lambd/2). Antenna elements (5) to (12) are arranged in such a way that three portions are bent and the bent antenna elements are located opposite to each other, while a length (b) of one edge thereof is set to a ¼ wavelength (lambd/4). One ends of the antenna elements (5) to (8) are connected to the antenna elements (1) to (4), whereas the other ends thereof are connected to the antenna elements (9) to (12). The antenna elements (9) and (10), and the antenna elements (11) and (12) are connected to each other at a power supply unit (13). With employment of such a structure, an antenna having a higher gain can be realized with having a simple plane structure.