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Novel low-cost millimeter-wave waveguide E-plane band rejection filters (BRFs) are proposed. In the E-plane BRF, a thin metal plate on which several lightning-shape one-wavelength conductors are formed as resonators by etching process is assembled in a rectangular waveguide as well as conventional E-plane band pass filters (BPFs). For their simple configuration, their costs could be reduced compared...
In portable telephone systems for mobile satellite and cellular radio communications, elliptic-function filters are used to achieve miniaturization of filters with low loss and high isolation characteristics. In this paper, we present a narrow line coupled elliptic-function filter which has planar stripline structure. A sub-resonator, named "F-form resonator" here, is proposed for the coupling...
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