EngineeringElectrical EngineeringCircuit TheoryMicrowave EngineeringOptoelectronicsDevice ModelingDevice SimulationMicrostrip CircuitsMicrowave Device SimulationMicrowave Network AnalysisMicrowave System DesignCouplersMicrostrip CouplersMicrowave Coupler DesignMicrowave ModelingMicrowave SplittersMultimode Interference Couplers
Multimode interference (MMI) structures have found wide application as low-order couplers, splitters, combiners, switches and multiplexers. Recent advances in MMI devices have led to ultra-short MMI couplers, segmented MMI structures and cascaded MMI switches. This paper reviews the modeling techniques applicable to MMI structures. The paper covers analytical, semi-analytical and numerical approaches to the analysis and design of these newer MMI devices
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