A novel single-feed circular microstrip antenna with reconfigurable polarization capability

作者：Kim Boyon^*; Pan Bo; Nikolaou Symeon; Kim Young Sik; Papapolymerou John; Tentzeris Manos M

来源：IEEE Transactions on Antennas and Propagation, 2008, 56(3): 630-638.

DOI：10.1109/TAP.2008.916894

• circular polarization
• linear polarization
• microstrip antenna
• PIN diode
• reconfigurable polarization

A single-feed circular microstrip antenna with reconfigurable polarization capability is proposed. This antenna has a simple structure, which consists of a radiating circular patch, five switches (PIN diode), three matching stubs, and a 50 Omega microstrip feed line. It can be switched between 4 different states: two states (low-frequency and high-frequency) for linear polarization (LP), one state for left hand circular polarization (LHCP) and one for right hand circular polarization (RHCP) by controlling the bias voltage of two PIN diodes. At the same time, three switchable matching stubs are used for matching every polarization state. Simulation results and experimental results show that the proposed antenna demonstrates a low cross polarization level, good impedance bandwidth, and a very good axial ratio in the circularly polarized states.

• 出版日期2008-3