Title :
Circular polarization operation of double-slot fed microstrip antennas
Author :
Aksun, M.I. ; Wang, Z.H. ; Chuang, S.L. ; Lo, Y.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
The circular polarization (CP) operation of double-slot-fed microstrip antennas is studied theoretically and tested experimentally. Typical results for CP square and rectangular microstrip antennas on 1/8-in-thick substrates (Rexolite 2200 with a relative permittivity of 2.62) are shown. The rectangular patch is designed by the use of a feed loci plot in which the effective dimensions of the patch are used to take the fringing field effects into account. The axial ratios in both cases are much lower than 3 dB over a wide range of observation angles, even though the theory only guarantees CP at the broad side.<>
Keywords :
electromagnetic wave polarisation; microstrip antennas; CP; Rexolite 2200; axial ratios; circular polarisation operation; double-slot fed microstrip antennas; feed loci plot; fringing field effects; rectangular patch; square patch; substrates; Antenna feeds; Antenna theory; Electromagnetic coupling; Electromagnetic waveguides; Microstrip antennas; Microwave antennas; Monolithic integrated circuits; Polarization; Slot antennas; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134768
