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A compact waveguide magic-T design composed of open-ended microstrip lines and laminated waveguide in multilayer LTCC technology is proposed. Two orthogonal slots are used to excite even- and odd-symmetric field patterns, respectively, resulting in a good isolation between each other. An X-band waveguide magic-T is developed in LTCC to validate the proposed topology. The measurements agree well with...
This paper proposes a vertical transition between microstrip line and substrate integrated waveguide (SIW) on multilayer low-temperature co-fired ceramic (LTCC) as well as its equivalent circuit model. The transition structure is realized by a shorted via between microstrip line and the bottom of SIW. The equivalent model is derived by calculating the input impedance in waveguide and the simulation...
This paper proposes a new cross coupling structure of a vertically stacked waveguide filter in a multilayer low-temperature co-fire ceramic technology. The filter is excited by open-ended microstrip lines. Adjacent cavities are coupled vertically by narrow slots. Cross coupling for quasi-elliptic response is realized by through vias and short-circuited CPW feed line. From the results, the circuit...
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