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This paper proposes a primary radiator using leaky-wave antenna with left-handed cylindrical waveguide. Negative permeability is realized by the cutoff TM01 mode in a hollow waveguide and also negative permittivity is realized by the cutoff dominant TE mode in a sector waveguide with a ridge. Then the left-handed leaky-wave antenna with slits opened is applied to a primary radiator without sub-reflecting...
This paper proposes a new type of compact evanescent-mode waveguide filter composed of planar dual-behavior resonators, which can produce multiple transmission zeros without any cross-coupling structures. The introduction of the planar resonators working in the evanescent-mode waveguide makes the length of the interval between the resonators much shorter than one-quarter guided wavelength, thereby...
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