Title :
Field theory CAD of profiled corrugated rectangular or circular horns by an efficient full-wave modal-S-matrix method
Author :
Arndt, F. ; Papziner, U. ; Bohl, R.
Author_Institution :
Microwave Dept., Bremen Univ., Germany
fDate :
June 28 1993-July 2 1993
Abstract :
A full-wave combined modal expansion and aperture field integration method is applied for the efficient design of profiled corrugated horns with circular, rectangular or combined cross-section. The generalized modal S-matrix combination of adequate key building blocks, i.e., the circular, rectangular, or rectangular-to-circular waveguide step discontinuity, takes the influence of the higher-order modes and the aperture effect rigorously into account. An optimized broadband profiled corrugated circular horn design example utilizing 40 varying slot elements with a rectangular waveguide input section demonstrates the usefulness of the method by achieving more than 26dB return loss, about 20 dB gain, and less than -30dB cross-polarization for a bandwidth of about 1.7:1. The theory is verified by comparison with available measurements.<>
Keywords :
CAD; S-matrix theory; antenna radiation patterns; electromagnetic field theory; horn antennas; rectangular waveguides; waveguide discontinuities; 20 dB; 26 dB; CAD; aperture effect; bandwidth; corrugated circular horn; corrugated rectangular horn; cross-polarization; full-wave modal-S-matrix method; gain; higher-order modes; profiled corrugated horns; rectangular waveguide; return loss; varying slot elements; waveguide step discontinuity; Apertures; Broadband antennas; Design optimization; Gain; Geometry; Horn antennas; Microwave theory and techniques; Rectangular waveguides; Waveguide discontinuities; Waveguide transitions;
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.1993.385174
