Title :
Broad-band cavity-backed and capacitively probe-fed microstrip patch arrays
Author :
De Aza, Miguel A González ; Zapata, Juan ; Encinar, José A.
Author_Institution :
Dept. de Electromagnetismo y Teoria de Circuitos, Univ. Politecnica de Madrid, Spain
fDate :
5/1/2000 12:00:00 AM
Abstract :
A hybrid full wave method for the analysis of probe-fed infinite phased arrays of single and stacked microstrip patches, backed by metallic cavities, is applied to investigate the combined utilization of the capacitive probe-feeding technique and the cavity enclosure of microstrip patches. The goal is to obtain broad-band microstrip antennas on thick substrates without the limitations due to the generation of surface waves of the conventional microstrip antennas on infinite substrates. A design procedure for the capacitive coupling is investigated and theoretical results for the active input impedance and radiation characteristics of different wide-band antenna designs are presented
Keywords :
S-matrix theory; antenna feeds; antenna phased arrays; antenna radiation patterns; capacitance; electric impedance; finite element analysis; microstrip antenna arrays; modal analysis; 2D FEM; active input impedance; broad-band cavity-backed array; broad-band microstrip antennas; capacitive coupling; capacitive probe-feeding technique; capacitively probe-fed microstrip patch array; cavity enclosure; generalized scattering matrix; hybrid MM-GSM-FE numerical technique; hybrid full wave method; infinite substrates; metallic cavities; microstrip antennas; mode-matching; probe-fed infinite phased arrays; radiation characteristics; single microstrip patch; stacked microstrip patch; surface waves generation; thick substrates; two-dimensional finite-element method; wide-band antenna design; Antenna feeds; Antenna theory; Broadband antennas; Coaxial components; Microstrip antenna arrays; Microstrip antennas; Phased arrays; Probes; Surface impedance; Surface waves;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
