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Leaky-Wave Antennas of CRLH Waveguide Using the Cutoff TM01 Mode and the Sector-Shaped Cutoff TE Mode

This paper proposes a leaky-wave antenna based on the left-handed cylindrical waveguide. Negative permeability is realized by the cutoff TM01mode in a hollow waveguide and also negative permittivity is realized by the cutoff dominant TE mode in a sector waveguide with a ridge. The calculated and measured transmission characteristics of the proposed waveguide are presented, and also the proposed waveguide is applied to a leaky-wave antenna using 1 slit, 2 slits and 4 slits on the TM waveguide walls. Its effectiveness is verified numerically and experimentally from the radiation patterns.