Title :
Measurement and FEM modeling of a reconfigurable-patch antenna for use in the wideband gapfiller satellite system
Author :
Lee, A.W.M. ; Kagan, S.K. ; Wong, M. ; Singh, R.S. ; Brown, E.R.
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A reconfigurable aperture (recap) patch antenna with resonant frequencies of 18 GHz and 28 GHz is demonstrated for use in the wideband gapfiller satellite system The antenna is characterized experimentally with a metal strip representing a closed switch and a gap representing an open switch. The return loss is matched to within 1.5 dB at the two frequencies, consistent with nearly equal resonant impedance. Antenna patterns at 18 GHz show half-power beam-widths (HPBW) of 65/spl deg/ (E-plane) and 115/spl deg/ (H-plane) with slight asymmetry. The antenna patterns at 28 GHz show HPBWs of 75/spl deg/ (E-plane) and 50/spl deg/ (H-plane). Finite-element method (FEM) computations are performed and compared with experimental results.
Keywords :
antenna radiation patterns; aperture antennas; broadband antennas; finite element analysis; microstrip antennas; multifrequency antennas; satellite antennas; 18 GHz; 28 GHz; FEM modeling; MEMS switches; antenna patterns; finite-element method; half-power beam-width; reconfigurable aperture antenna; reconfigurable-patch antenna; resonant frequency; resonant impedance; return loss; wideband gapfiller satellite system; Antenna measurements; Aperture antennas; Broadband antennas; Finite element methods; Impedance; Patch antennas; Resonance; Resonant frequency; Satellite antennas; Switches;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1217476
