Title :
A Novel Single-Feed Circular Microstrip Antenna With Reconfigurable Polarization Capability
Author :
Kim, Boyon ; Pan, Bo ; Nikolaou, Symeon ; Kim, Young-Sik ; Papapolymerou, John ; Tentzeris, Manos M.
Author_Institution :
Samsung Electron., Yongin
fDate :
3/1/2008 12:00:00 AM
Abstract :
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 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.
Keywords :
antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; p-i-n diodes; PIN diode switches; left hand circular polarization; matching stub; radiating circular patch; reconfigurable polarization; right hand circular polarization; single-feed circular microstrip antenna; Antenna feeds; Antenna measurements; Frequency diversity; Impedance matching; Log periodic antennas; Microstrip antennas; Polarization; Slot antennas; Switches; Voltage control; Circular polarization; PIN diode; linear polarization; microstrip antenna; reconfigurable polarization;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.916894
