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Based on the simple mode-matching key-building block of the single double-plane step discontinuity, a general modal admittance formulation is presented for the rigorous CAD of longitudinal multi-channel or -aperture coupled rectangular waveguide structures of arbitrary size and location. The theory involves an arbitrary number of rectangular coupling(More)
A rigorous field theory analysis is presented for cross-irises in rectangular waveguides, as well as for cross-iris coupled rectangular waveguide resonators. Arbitrary iris location, unequal E-and H-plane cross size and finite thickness are rigorously taken into account. The scattering parameters of a cross-iris coupled one-resonator filter in the waveguide(More)
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