Title :
Compact circularly polarized microstrip antenna with magnetic substrate
Author :
Zhong, Shun-Shi ; Cui, Jun-Hai
Author_Institution :
Dept. of Commun. Eng., Shanghai Univ., China
Abstract :
A novel compact circularly polarized single-feed microstrip antenna with magnetic substrate is proposed. The antenna is analyzed by using the finite difference time domain (FDTD) method and the effects of parameters of its center-slot and side-slots on the input impedance and return loss are presented for the guidance of design. The experimental results show that the proposed antenna has a size reduction of more than 40% as compared with the conventional design and that its 3 dB axial ratio bandwidth is 3.5% while the 2:1 VSWR bandwidth reaches 12.6%. Therefore the usage of magnetic substrate with the new design not only reduces the size of antenna, but also improves the impedance bandwidth significantly.
Keywords :
antenna feeds; antenna radiation patterns; electric impedance measurement; finite difference time-domain analysis; microstrip antennas; substrates; FDTD method; antenna analysis; center-slot; circularly polarized microstrip antenna; compact microstrip antenna; finite difference time domain method; impedance bandwidth; input impedance; magnetic substrate; return loss; side-slots; single-feed microstrip antenna; size reduction; Bandwidth; Feeds; Finite difference methods; Impedance; Magnetic analysis; Magnetic domains; Magnetic materials; Microstrip antennas; Polarization; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016462
