Vertically polarized omni-directional loop slot array antenna for mobile base station

Abstract

A slim vertically polarized omni-directional feed circuit integrated loop slot antenna for mobile base station is proposed in this paper. Picocell antenna requires a compact and slim structure, because its construction space is limited in urban areas. The proposed antenna consists of loop slots and patches to improve omni-directional pattern and bandwidth. In order to enhance the directivity gain, we arrange two loop slot antennas in vertical plane with microstrip line connecting the slots. The size of antenna is only 0.17λ× 1.45λ. This antenna realizes more than 15% relative bandwidth, and an omni-directional pattern in both simulation and measurement results.