Design of wideband table-shaped reconfigurable antennas

Abstract

By supporting an L-probes coupled circular patch antenna with four metallic posts at appropriate locations, it is demonstrated that different radiation modes can be operated at the same frequency across a wide bandwidth. Owing to the table like structure of the antenna, it is called “Table-shaped Antenna”. The antenna is re-configurable in radiation patterns when suitable switching feed network is applied. This paper demonstrated three antennas, with different reconfigurable radiation modes, base on the structure of Table-shaped Antenna, which include: conical and broadside radiation, conical and dual-linearly polarized radiation, and conical and circularly polarized radiation. These antennas have the advantages of simple structure, wideband and with multiple applications, which is an excellence candidate for future mobile communication systems.