Design and harmonic balance analysis of a wideband planar antenna having reconfigurable omnidirectional and directional patterns

In this paper we discuss a novel reconfigurable antenna equipped using PIN diodes and analyze the harmonic distortions that may be generated. The design herein described is for a novel planar antenna that can generate omnidirectional and directional radiation patterns by switching between microstrip elements. Based on the equivalent circuit model of the antenna, we have performed a harmonic balance circuit simulation to consider channel distortion due to employment of these reconfigurable antennas as part of a 2×2 MIMO system over broad bandwidth communication channel.