Investigation of a radiometer-scatterometer with a degenerate parametric amplifier
Abstract
Theoretical and experimental results are presented on a radiometer-scatterometer system which has a degenerate parametric amplifier (DPA) at the input and operates on the homodyne reception principle. The transfer and noise characteristics of the DPA-mixer system are calculated for synchronous frequency modulatuion of the pump and heterodyne signals. A high-sensitivity radiometer-scatterometer system with an input DPA was realized experimentally in the 1.5-cm band. The sensitivity of the radiometer channel amounted to 0.02 K at tau = 1 sec.
- Publication:
-
Radiotekhnika i Elektronika
- Pub Date:
- March 1987
- Bibcode:
- 1987RaEl...32..574V
- Keywords:
-
- Parametric Amplifiers;
- Radiometers;
- Scatterometers;
- Block Diagrams;
- Frequency Modulation;
- Homodyne Reception;
- Sensitivity;
- Instrumentation and Photography