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This paper proposes a novel coaxial-excited waveguide filter, of which the resonator is a new planar resonator called the frequency selective surface (FSS). The new FSSs located at the input and output ports are directly excited by the coaxial line. In a conventional approach, the transition from TEM mode to TE10 mode is done by the coaxial probe located at the position of a quarter guided wavelength...
This paper presents a high-performance waveguide filter constructed by novel metallic resonant windows, which have a resonant characteristic with two attenuation poles on both sides of a passband, that is, a dual-behavior resonance. Such resonant windows make it possible to produce multiple attenuation poles without any additional coupling structures, thereby realizing a compact and light-weight filter...
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