2008 · 22 citations · 3 references
EngineeringElectrical EngineeringMaterials ScienceMicroelectronicsSemiconductor DevicesSemiconductor MaterialsHigh-frequency Semiconductor DevicesMicrowave AmplifiersMicrowave Semiconductor DevicesSemiconductor HeterostructuresWaveguidesWide Band Gap SemiconductorsAmplificationElectromagnetic Wave Energy PropagationElectron DriftEnergy TransferHeterostructure DevicesHeterostructuresPeriodic StructureWaveguide Amplifiers
In this paper travelling wave amplification is experimentally demonstrated in the dielectric rod waveguide at W band. An AlGaAs/GaAs heterostructure chip is inserted in the waveguide, and the applied electric field causes an electron drift. Due to the energy transfer from the drifting electrons the electromagnetic wave travelling in the periodic structure is amplified. A maximum of about 8 dB/cm electronic gain was observed in the measurements with the electric field of 150 V/cm.
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