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A 3D structure for the realisation of a triplexer with star-junction topology is proposed using low-temperature co-fired ceramic (LTCC) technology. By properly locating the resonators in different layers, a triplexer with three fourth-order filter channels (30.5-31, 31.75-32.25, 33-33.5 GHz) for Ka-band applications is designed and fabricated. Good agreement is achieved between simulation and measurement.
Date of Publication: September 29 2011