Extra Info
Log-Periodic Dipole Array (LPDA) fed parabolic reflector antennas serve high-gain broadband purposes akin to satellite tv for pc communication, radio astronomy, and wideband radar, the place fixed efficiency over large frequency ranges is important. Regardless of practically seven a long time of analysis for the reason that pioneering work of DuHamel and Ore in 1958, the synthesis and evaluation of those antennas stay advanced, requiring the tuning of many parameters throughout broad bandwidths. Conventional simulation approaches — combining Methodology of Moments for the LPDA with bodily optics for the reflector — can not account for mutual coupling between the feed and dish, and break down when assist struts or electrically giant reflectors are concerned. This white paper presents a sophisticated full-wave simulation methodology utilizing larger order foundation capabilities that reduces unknowns by an order of magnitude in comparison with typical MoM, demonstrates a sensible three-step design technique from stand-alone feed optimization by means of full antenna integration, and supplies validated outcomes for reflector diameters starting from 24.2 λ to 242 λ with bandwidth ratios of 10:1 — all executed on normal desktop {hardware} with CPU/GPU acceleration.
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