Title :
Axially magnetized circular ferrite microstrip antenna
Author :
Roy, J.S. ; Vaudon, P. ; Reineix, A. ; Jecko, F. ; Jecko, B.
Author_Institution :
IRCOM, Limoges Univ., France
Abstract :
Theoretical and experimental investigations on a circular ferrite microstrip antenna (FMA), biased axially by a steady magnetic field, are reported. The ferrite medium is partially magnetized to generate good circular polarization. The simple cavity model is used for the analysis of the circular FMA. The resonance condition of the circular FMA is obtained. The magnetic tuning can be understood from this resonance condition. The circularly polarized far fields are derived. The total radiated power and the dielectric, conductor, and magnetic losses are calculated in order to obtain the gain of the circular FMA. The resonant frequency, gain, and circularly polarized radiation pattern, computed theoretically for a circularly FMA, were verified experimentally.<>
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; ferrite devices; magnetic fields; microstrip antennas; axially magnetised antenna; cavity model; circular ferrite microstrip antenna; circular polarization; conductor losses; dieletric losses; far fields; ferrite medium; gain; magnetic field; magnetic losses; magnetic tuning; radiation pattern; resonance condition; resonant frequency; total radiated power; Antenna theory; Conductors; Dielectric losses; Ferrites; Magnetic analysis; Magnetic fields; Magnetic resonance; Microstrip antennas; Polarization; Tuning;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221425
