Reconfigurable multiband patch antenna for Ground Penetrating Radar applications

Multi-frequency Ground Penetrating Radar (GPR) has become increasingly popular choice of system design in order to enhance the ability to operate in diverse environmental conditions as well as different scanning methods and target characterisation. The main component of a GPR system is comprised of an antenna design and the recent interests in multi frequency radar systems have coincided with the development of frequency reconfigurable antennas which can provide suitable performance. In this work, a new reconfigurable patch antenna is investigated, that is able to switch between different radar operating frequencies using modelled RF MEMS switches. Different combinations of the switches allow the design to alter the length and shape of the radiating element. The initial design of the antenna consists of a circular patch surrounded by multiple annual rings that can be connected together according to the switches activation configuration. Experimental work and modifications to the initial design are in progress and the results will be presented in the ICEAA-IEEE APWC conference.