Electronics Letters · 1987 · 15 citations · 1 references
EngineeringElectrical EngineeringAntennasElectromagneticsMicrowave EngineeringImpedance MatchingMicrostrip AntennasMicrostrip CircuitsMicrowave AntennasMicrowave Integrated CircuitsMicrowave Transmission LinesBroadband Coupler DesignHybrid CouplersMicrostrip Circuit DesignMicrostrip CouplersMicrostrip Hybrid CouplersMicrowave Coupler DesignQuarter-wave Transformers
The bandwidth of a microwave microstrip hybrid ring has been extended to 28%. Double quarter-wave transformers are used, maintaining very flat coupling.
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