IEEE Transactions on Microwave Theory and Techniques · 1973 · 12 citations · 4 references
EngineeringElectrical EngineeringAnalog ElectronicsMicroelectronicsMicrowave EngineeringHigh-frequency Semiconductor DevicesLow-noise Circuit DesignMicrowave AmplifiersMicrowave Integrated CircuitsMicrowave MixersMicrowave Semiconductor DevicesConversion GainInput Port DesignLow-noise AmplifiersLow-noise Microwave SourcesLow-noise MixersMixers Noise AnalysisNoise Matching
A low-noise balanced down-converter for microwave radio-link applications is described. Down-converters of this type have been realized with typical noise figures of 3.5 dB at 4 GHz, 4 dB at 7 GHz, and 5 dB at 13 GHz. These results are obtained mainly by taking into account high order sideband frequencies of the pump harmonics up to the third, by properly terminating the image frequency, by matching the input port of the mixer and by optimizing the mixer-preamplifier interface. The experimental results are compared with the theoretical ones obtainable with ideal purely resistive diodes.
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