Analysis of radiation patterns of compound box-horn antenna

A new type of antenna named as compound box- horn antenna is designed and analyzed for its radiation pattern. The present analysis is based on plane wave spectra for three- dimensional fields. The compound box- horn antenna is obtained by combining modi. ed box- horn and pyramidal horn antennas, in which modi. ed box- horn is coupled to pyramidal horn to excite TE10- and TE30-modes at the input of pyramidal horn. Thus, the compound boxhorn antenna has properties and advantages of both the modi. ed box- horn and pyramidal horn antennas. The radiation patterns and corresponding half- power beam widths ( HPBWs) of compound boxhorn antenna in free- space are computed at 10 GHz and compared for different. are angles in E- and H- planes of larger size pyramidal horn section of the compound box- horn. The results for HPBWs in Eand H- planes demonstrate that the radiation patterns in E- and Hplanes for compound box- horn can be made narrower by decreasing the. are angles in both E- and H- planes of larger size pyramidal horn section of the compound box- horn. The radiation patterns of compound box- horn are also compared with those for TE10- mode pyramidal horn of same aperture size and it found that the former horn is narrower in E- as well as H- plane than the latter. The analysis has been validated against the experimental results available in the literature. The work presented here can provide useful design