Title :
Resonant frequency and antenna pattern of a dielectrically filled, circular waveguide fed slot antenna
Author :
Hummer, K.A. ; Ming-Yi Li ; Kai Chang ; Speciale, R.A.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
The effects of a dielectric filling material on the characteristics of a circular waveguide fed slot antenna are given. The antenna pattern is found using a sinusoidal aperture E-field distribution. The resonant frequency is found by using a theory for cavity backed slot antennas. The theoretical and experimental resonant frequency and antenna pattern of a dielectric-filled, circular waveguide fed slot antenna are presented. The error in resonant frequency was always less than 1% while the error in half-power beamwidth was less 2.61%. The good agreement between the theory and experiments implies that the main effect of the dielectric is in changing the propagation constant in the slot and not the slot aperture field distribution.<>
Keywords :
antenna feeders; antenna radiation patterns; circular waveguides; dielectric-loaded antennas; resonance; slot antennas; 4.77 GHz; 9.5 GHz; SHF; antenna pattern; circular waveguide fed slot antenna; dielectric filling; resonant frequency; sinusoidal aperture E-field distribution; Antenna feeds; Antenna theory; Aperture antennas; Dielectric constant; Dielectric losses; Dielectric materials; Filling; Resonance; Resonant frequency; Slot antennas;
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.1992.222010
