Title :
Hybrid finite element/waveguide mode analysis for infinite phased arrays of cavity radiators
Author :
McGrath, D.T. ; Pyati, V.P.
Author_Institution :
US Air Force Inst. of Technol., Wright-Patterson AFB, OH, USA
fDate :
June 28 1993-July 2 1993
Abstract :
A hybrid finite element method (HFEM) has been developed for analyzing the scanning properties of cavity radiators imbedded in an infinite phased array. By expressing the transverse boundary fields in terms of waveguide modes on the cavity´s feed side and Floquet modes on the radiating side, continuity conditions are imposed on the variational functional. Three-dimensional vector finite elements are used to expand the electric field inside the cavity. Validation results for the implementation of this approach in a computer code are presented. These results demonstrate that the method is accurate and versatile, correctly predicting the scanning performance of a large variety of practical array radiators.<>
Keywords :
Helmholtz equations; antenna phased arrays; cavity resonators; finite element analysis; functional equations; program verification; scanning antennas; variational techniques; Floquet modes; cavity radiators; computer code; continuity conditions; hybrid finite element method; infinite phased arrays; scanning performance; transverse boundary fields; variational functional; vector finite elements; waveguide modes; Apertures; Conducting materials; Feeds; Finite element methods; Integral equations; Phased arrays; Reflection; Sparse matrices; Tellurium; Transmission line matrix methods;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1993. AP-S. Digest
Conference_Location :
Ann Arbor, MI, USA
Print_ISBN :
0-7803-1246-5
DOI :
10.1109/APS.1993.385123
