Reconfigurable resonant module for mobile antenna designs

Novel resonant modules for constructing reconfigurable antenna is proposed in the paper. The basic configuration of the module, named as the prototype module, is designed based on a series LC resonant circuit. By adding a varactor to the module, it can be transformed into a reconfigurable module. The proposed modules are demonstrated by constructing a 4G-LTE antenna. The reconfigurable module, which is of 20×20 mm2, is designed to switch between LTE700 (698–787 MHz) and GSM850 (824–960 MHz) bands. All designs have been realized and measured for validation. The proposed antenna modules, which are simple and convenient to use, can provide flexibility, especially in antenna deployment, in multi-band mobile antenna designs.