1997 · 21 citations · 4 references
EngineeringElectrical EngineeringMicroelectronicsMicrowave EngineeringOptoelectronicsIntegrated Circuit DesignMicrowave FiltersMicrowave Integrated CircuitsMicrowave Transmission LinesMillimeter-wave CommunicationsRadio-frequency Integrated CircuitsDiplexersFiltersHigh-frequency AttenuationIntegrated Waveguide CircuitsMillimeter-wave Integrated CircuitsMonolithic Microwave Integrated Circuit DesignPlanar FiltersPlanar Microwave Circuits
Low-loss H-plane waveguide filters for planar integrated assemblies are described showing high attenuation near the pass-band due to a special modification of the outer inverter circuits. The outer irises are replaced by short-circuited T-junctions resulting in at least one pole above or below the pass-band. Such filters favorably can be combined to low-loss diplexer circuits for mm-wave applications. Examples of a single filter as well as of diplexers in the 28 GHz and 38 GHz frequency range are given.
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