Magnetically Switchable Shorted Patch Antenna

Switchable magnetic media and shorting posts are popular in controlling the radiation characteristics and the size of microstrip antennas or array. In this paper, a ferrite based shorted patch antenna is designed to demonstrate magnetically switchable frequency response. Simulated resonance and radiation responses of the probe feed antenna revealed improved impedance bandwidth, antenna size reduction, tunable and non-tunable switched resonance and low biasing requirement for switching the antenna. Over the past decade, many techniques have been adopted to reduce the size of a microstrip patch antenna and make it more compliant with small communication devices. This includes using high dielectric constant material and loading the antenna with shorting posts [1] and diodes [2]. Shorting posts are typically placed at the edge of the radiating patch, close to th