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A microstrip-fed log-periodic antenna integrated with a planar ultra-wideband balun printed on the same PCB is presented. The UWB balun feed is particularly designed using a compensated scheme that provides a stable main beam direction and gain level and a fixed phase center over the entire bandwidth (1∼6GHz). The antenna operates in two orthogonal linear polarizations with two separate ports. The...
A novel broadband circularly polarized aperture antenna is presented that uses traveling-wave excitation as the design concept. The antenna configuration consists of a circular radiating aperture, a backed cavity, and an equiangular tapered strip outer-fed by a microstrip transmission line. Operating with a traveling wave excitation, the proposed antenna contains inherent broadband characteristics...
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