Aperture-Coupled Microstrip Antenna with Four Slits and T-Slits for Compact Circular Polarization Operation

슬릿이 부설된 소형 원편파 개구결합 마이크로 스트립 안테나

A novel compact circular polarization operation of the microstrip antenna with four-slits and T-slits is proposed. The mechanism for compact size antenna is investigated with the behavior of the currents on the radiating patch. The equivalent surface current path due to the slits is lengthened, reducing the resonant frequency at a fixed patch size. The proposed compact CP design can have an antenna size reduction of about 33 ∼ 45％ as compared to the conventional microstrip antenna. Details of the experimental and measured results are presented and analysed.