Microwave and Optical Technology Letters · 2001 · 28 citations · 3 references
EngineeringElectrical EngineeringMicroelectronicsMicrowave EngineeringSemiconductor DevicesHigh-frequency Semiconductor DevicesImpedance MatchingMicrowave Integrated CircuitsMicrowave MaterialsMicrowave Semiconductor DevicesMicrowave Transmission LinesCoplanar WaveguidesCouplersInsertion LossInsertion Loss MeasurementInsertion Loss ReductionMicrowave Coupler DesignPlanar Microwave CircuitsSilicon
Abstract This paper describes coplanar waveguide (CPW) quadrature couplers that utilize metal–insulator–metal (MIM) capacitors at each corner, eliminating the need for air bridges and significantly reducing the coupler footprint. A 20 GHz coupler on high‐resistivity silicon with branch lengths of 40° (660 μm) is presented—the area is 80% smaller than a conventional design. A measured insertion loss of ∼4.5±0.5 dB was achieved at 20 GHz. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 3–5, 2001.
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Journal of the Franklin Institute · 1963 · 5.8K citations