Influence of hard corrugated PBG wall design on performance of conical horn antenna

A Novel Horn Radiator With High Aperture Efficiency and Low Cross-Polarization and Applications in Arrays and Multibeam Reflector Antennas

“…Gain enhancement was also demonstrated by introducing a symmetrical metal plate inside a conical horn [13]. Hard wall horns using photonic-bandgap structure walls and strip-loaded walls were proposed for gain enhancement purpose [14]- [16], [27], [28].…”

On one approach to creation of dual-band hard horn

“…So, matching the electric field (2) to the fields (4) in two grooves on the corrugated surface @ = a ) and integrating the expression over the angular period, we obtain (the fin thickness is assumed to be zero for simplicity) the equation (3) and (1) on the corrugated surface for each of .two neighbor grooves gives us two more equations Dividing now the left and right parts of (7) by the left and right parts of (S), respectively, and talung into account the relation BdBI=hJl(hla)~h?fi(h2)~ resulting from (8) and (9), we obtain the dispersion equation E--, 1 Jl(g0) (10) g J , ( g 4 which should be solved together with (5). Note that if &2=.3, then h2=hl, and, from (6), f2(hzp)=J(hrp), and (10) is reduced to a dispersion equation given in (1) for corrugations of identical groove fiIling.…”