Miniaturized and Reconfigurable CPW Square-Ring Slot Antenna Loaded With Ferroelectric BST Thin Film Varactors

作者：Jiang Hai^*; Patterson Mark; Brown Dustin; Zhang Chenhao; Pan KuanChang; Subramanyam Guru; Kuhl David; Leedy Kevin; Cerny Charles

来源：IEEE Transactions on Antennas and Propagation, 2012, 60(7): 3111-3119.

DOI：10.1109/TAP.2012.2196918

• Antenna miniaturization
• coplanar waveguide (CPW) antenna
• ferroelectric thin film
• ferroelectric varactor
• reconfigurable antenna
• slot loop antenna
• varactor loadings

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 0.067 lambda(0) x 0.067 lambda(0) without ground, and 0.067 lambda(0) x 0.067 lambda(0) 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.

• 出版日期2012-7