Title :
Slot conductance and radiation properties of elliptical microstrip antennas with arbitrary ellipticity
Author :
Tranquilla, J.M. ; Sun, K. ; Hess, D.F.
Author_Institution :
Dept. of Electr. Eng., New Brunswick Univ., Fredericton, NB, Canada
Abstract :
The slot admittance and radiated fields are calculated for elliptical microstrip antennas with arbitrary ellipticity and feed points by using a full Mathieu function formulation. The slot conductance in the limit agrees with the result of L.C. Shen (1979). The circular polarization of the radiated field can only be obtained for a feed point along the radial direction of phi /sub 0/=45 degrees . Varying the feed point along the radial direction of phi /sub 0/=45 degrees strongly affects the radiated fields at circular polarization.<>
Keywords :
antenna radiation patterns; antenna theory; electric admittance; electromagnetic wave polarisation; microstrip antennas; arbitrary ellipticity; circular polarization; elliptical microstrip antennas; feed point; full Mathieu function formulation; radiated fields; slot admittance; slot conductance; Admittance; Antenna theory; Boundary conditions; Equations; Feeds; Microstrip antennas; Polarization; Region 1; Region 2; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.
Conference_Location :
Dallas, TX, USA
DOI :
10.1109/APS.1990.115191
