Accurate method for determining the IF noise in SIS heterodyne receivers
We present a new method to determine the contribution of the IF-amplifier chain to the overall noise performance of an SIS-based receiver. Using simulated I-V and IF power characteristics, we show that the standard method used to date to evaluate the IF noise can underestimate the contribution becau...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Kluwer Academic/Plenum Publ Corp
2000
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| Summary: | We present a new method to determine the contribution of the IF-amplifier chain to the overall noise performance of an SIS-based receiver. Using simulated I-V and IF power characteristics, we show that the standard method used to date to evaluate the IF noise can underestimate the contribution because of non-negligible curvature in the post-gap SIS I-V characteristic. We demonstrate that the new method is not susceptible to the post-gap curvature, and discuss its benefits and limitations to the accurate and precise evaluation of IF noise contributions. |
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