Extra Data
Log-Periodic Dipole Array (LPDA) fed parabolic reflector antennas serve high-gain broadband functions corresponding to satellite tv for pc communication, radio astronomy, and wideband radar, the place fixed efficiency over huge frequency ranges is important. Regardless of almost seven a long time of analysis because the pioneering work of DuHamel and Ore in 1958, the synthesis and evaluation of those antennas stay complicated, 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’t account for mutual coupling between the feed and dish, and break down when assist struts or electrically massive reflectors are concerned. This white paper presents a sophisticated full-wave simulation methodology utilizing larger order foundation features that reduces unknowns by an order of magnitude in comparison with standard MoM, demonstrates a sensible three-step design technique from stand-alone feed optimization by way of full antenna integration, and gives validated outcomes for reflector diameters starting from 24.2 λ to 242 λ with bandwidth ratios of 10:1 — all executed on commonplace desktop {hardware} with CPU/GPU acceleration.
