Title :
Slot coupling in a radial line slot antenna for 12-GHz band satellite TV reception
Author :
Sasazawa, Hideo ; Oshima, Yasuhide ; Sakurai, Kimio ; Ando, Makoto ; Goto, Naohisa
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
fDate :
9/1/1988 12:00:00 AM
Abstract :
Coupling between slots and slow-wave waveguides in a radial line slot antenna (RLSA) is discussed. Field analysis of the waveguide with a surface impedance wall revealed a considerable change in the propagation constant due to coupling. Experiments were performed to confirm these results and to obtain the surface impedance for actual slots. The change in the propagation constant caused the antenna efficiency to exhibit its maxima at two separated frequencies. An efficiency of 60% and 50% was measured at 11.6 and 12.4 GHz, respectively, which confirms a theoretical prediction. This effect suggests the possibility of broadband planar antennas
Keywords :
direct broadcasting by satellite; microwave antennas; receiving antennas; television antennas; television reception; waveguide antennas; 11.6 GHz; 12 GHz; 12.4 GHz; 50 percent; 60 percent; DBS; broadband planar antennas; propagation constant; radial line slot antenna; satellite TV reception; slot coupling; slow-wave waveguides; surface impedance wall; Antenna measurements; Antennas and propagation; Couplings; Frequency; Planar arrays; Propagation constant; Slot antennas; Surface impedance; Surface waves; Waveguide transitions;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
