Crop circles have fascinated and perplexed people for decades, sparking debates and theories ranging from natural phenomena to extraterrestrial artistry. As new evidence and theories emerge, the ...

Abstract: A set of radiation pattern functions, suitable for synthesis of radiation patterns from circular aperture horn antennas, is obtained by assuming an aperture distribution consisting of the ...

Abstract: A conical beam may be obtained from balanced equiangular spiral antennas by constructing an antenna with more than two spiral arms and symmetrically connecting these arms to provide a ...