Title :
Theoretical and experimental study of the input impedance of the cylindrical cavity-backed rectangular slot antennas
Author :
Li, Ming-yi ; Hummer, Kenneth A. ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
8/1/1991 12:00:00 AM
Abstract :
The authors study the input impedance of a cylindrical cavity-backed slot antenna based on mode matching and the complex Poynting theorem. Two cavity-backed slot antennas were fabricated to verify the theory. The numerical results agree very well with measurements. Two resonant frequencies were found from the input impedance. One resonant frequency is attributed to the rectangular slot and the other is due to the cavity. The slot length controls the first resonant frequency and has a much stronger effect on the input impedance at the antenna operating frequency as compared with the cavity length
Keywords :
electric impedance; waveguide antennas; complex Poynting theorem; cylindrical cavity-backed slot antenna; input impedance; mode matching; rectangular slot; resonant frequency; Admittance; Antenna arrays; Antenna measurements; Antenna theory; Apertures; Fabrication; Impedance; Phased arrays; Resonant frequency; Slot antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
