A SWITCHED-BEAM ANTENNA USING CIRCUMFERENTIAL-SLOTS ON A CONCENTRIC SECTORAL CYLINDRICAL CAVITY EXCITED BY COUPLING SLOTS

作者：Wounchoum P; Worasawate D^*; Phongcharoenpanich C; Krairiksh M

来源：Progress in Electromagnetics Research-Pier, 2011, 120: 127-141.

DOI：10.2528/PIER11072207

This paper presents a switched-beam antenna using circumferential-slot on a concentric sectoral cylindrical cavity excited by coupling slots to operate at 5.8 GHz. The advantages of this antenna are conformal structure, high directivity and capable of switched-beam pattern in six directions. The antenna design starts from a single sector which is capable of switching between radiating and non-radiating modes. The L-shaped coupling slots are proposed to accommodate the switching circuit. Each RF switch is made of two PIN diodes connected in a reverse series connection and placed across the slot at the appropriate location. Subsequently, the exciting probe is designed for matching TM(01) mode of the circular waveguide. The measured results of the proposed antenna give a gain of 7 dBi and vertical bar S(11)vertical bar less than -20 dB at 5.8 GHz. This antenna is suitable for base station applications that require the switched-beam pattern in the azimuthal plane.

• 出版日期2011