Dual circularly polarized radial line slot antennas

A radial line slot antenna (RLSA) is a circularly polarized high efficiency planar array. Two types of RLSAs, a single-layered and a double-layered one, have been released commercially for 12 GHz band DBS reception. The former adopts nonuniform slots excited by a radially outward traveling wave, while the latter has uniform ones excited by an inward traveling wave. The paper merges the two into a novel, dual circularly polarized RLSA. Minimum antenna gain of 33.5 dBi in a DBS bandwidth of 500 MHz is measured for a 0.55 m diameter antenna.<
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