An enhanced bandwidth design technique for circular polarization broad-band microstrip antennas

Abstract

The narrow bandwidth of microstrip antenna is one of the important features that restrict its wide usage. An enhanced bandwidth design technique is presented in this paper. By loading different shapes of slots on parastic patch, the broad-band microstrip antennas is obtained. Utilizing this design technique, broad-band microstrip antennas have been proposed. To confirm the applicability of the method for the designs of antennas at C-band, simulations and experiments have been carried out. The measured results show that the proposed antennas have a relative bandwidth of up to 13%, and have a broad-band antenna gain no less than 6dB.