Title :
A dual-frequency small microstrip antenna
Author :
Gao, S.C. ; Li, L.W. ; Yeo, T.S. ; Leong, M.S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
A novel dual-frequency compact antenna, which uses an H-shaped microstrip patch loaded with shorting pins, is proposed and studied. This antenna can achieve both a significant reduction of antenna size and a dual-frequency operation with a single feed. More freedom for tuning the resonant frequencies, the ratio of two resonant frequencies, and the input impedance is available due to more design parameters. A detailed parameter study is performed and the theoretical analysis is based on the finite-difference time-domain (FDTD) method. The effects of several antenna parameters on two resonant frequencies, frequency ratio, and radiation pattern characteristics of the antenna are analyzed and compared. It is shown that various frequency ratios (1.91-4.23) can be obtained by varying the design parameters of this antenna. Several design curves are presented.
Keywords :
antenna radiation patterns; electric impedance; finite difference time-domain analysis; microstrip antennas; multifrequency antennas; FDTD method; H-shaped microstrip patch; compact antenna; design curves; dual-frequency antenna; finite-difference time-domain method; frequency ratio; input impedance; radiation pattern characteristics; resonant frequencies; shorting pins; single feed; small microstrip antenna; tuning; Antenna feeds; Finite difference methods; Impedance; Loaded antennas; Microstrip antennas; Performance analysis; Pins; Resonant frequency; Time domain analysis; Tuning;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
DOI :
10.1109/APS.2001.959406
