IEEE Transactions on Microwave Theory and Techniques · 1991 · 99 citations · 4 references
EngineeringElectrical EngineeringAntennasMicrowave EngineeringPropagationDirectional CouplersImpedance MatchingMicrostrip CircuitsMicrowave Network AnalysisMicrowave Transmission LinesTransmission LinesConformal MappingCouplersEven-odd Mode AnalysisMicrostrip CouplersMicrostrip Directional CouplersMicrostrip LinesMicrostrip Transmission LinesMicrowave Coupler Design
The characteristics of a slot-coupled directional coupler between two microstrip lines coupled through a rectangular slot in the common ground plane are studied. Conformal mapping techniques are used to obtain analytic closed-form expressions for the coupler's even and odd-mode impedance and propagation constants for any coupler configuration. Using the spectral domain approach, a full-wave analysis is performed to determine the dispersion properties of coupler parameters. Theoretical and experimental results for a 10-dB coupler at 10 GHz are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
4