A novel miniaturized and reconfigurable coplanar waveguide (CPW) square-ring slot antenna is presented in this paper. The miniaturization is achieved via a hybrid approach including ferroelectric varactor loadings, high dielectric constant materials, and tuning stub for impedance matching. For the first time, nine shunt ferroelectric (FE) BST (Ba(1-x)SrxTiO3) thin film varactors are integrated with the CPW antenna structure achieving both antenna miniaturization and reconfiguration at the same time. The size of the miniaturized antenna is reduced to 0.067λ0 0.067λ0 without ground, and 0.1λ0 0.1λ0 with ground. The resonant frequency of the miniaturized antenna can be reconfigured from 5.3 GHz to 5.8 GHz by applying a DC voltage. Measured E-plane and H-plane co-polarized patterns are presented.
- antenna radiation patterns;barium compounds;coplanar waveguides;dielectric materials;dielectric thin films;ferroelectric devices;impedance matching;slot antennas;strontium compounds;varactors;Ba(1-x)SrxTiO3;CPW antenna structure;DC voltage;E-plane co-polarized patterns;H-plane co-polarized patterns;antenna miniaturization;ferroelectric BST thin film varactors;ferroelectric varactor loadings;frequency 5.3 GHz to 5.8 GHz;high dielectric constant materials;impedance matching;miniaturized antenna;reconfigurable CPW square-ring slot antenna;reconfigurable coplanar waveguide square-ring slot antenna;resonant frequency;tuning stub;Coplanar waveguides;Iron;Probes;Slot antennas;Varactors;Antenna miniaturization;coplanar waveguide (CPW) antenna;ferroelectric thin film;ferroelectric varactor;reconfigurable antenna;slot loop antenna;varactor loadings
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