Compact 0.5–18 GHz double?ridged guide horn antenna

Broadband double-ridged guide horn (DRGH) antennas are extensively used in antenna measurement and electromagnetic compatibility interference testing, especially the 1–18 GHz DRGH which is widely accepted as a standard for this band. Certain deficiencies radiation patterns have been identified corrected by several authors, but use was still limited to frequency The incorporation of absorber materials lenses has resulted with wider bandwidths; however, complicates manufacturing process restricts these designs lower power applications. Simulated measured results new 0.5–18 (36:1) presented here. bandwidth made possible cavity design optimising other sections allow wideband operation without using lens or absorber. double ratio very compact, an aperture size 26.4 cm × 15.2 cm; sides less than 12% larger conventional (24.2 13.6 cm).