A novel low-noise downconverter system using a microstrip coupled transmission-mode dielectric resonator
Abstract
A low-noise downconverter system for microwave downlink applications is presented. Although most downconverters with an internally generated local oscillator have been designed utilizing MESFET's and DGFET's, the circuit described herein uses a silicon bipolar Darlington pair as its active device and a dielectric resonator for feedback. Downconverters of the latter type have been realized with noise figures as low as 4.57 dB and conversion gains of 7 dB over an intermediate frequency range from 0.6 to 1.8 GHz.
- Publication:
-
IEEE Transactions on Microwave Theory Techniques
- Pub Date:
- June 1987
- DOI:
- 10.1109/TMTT.1987.1133709
- Bibcode:
- 1987ITMTT..35..591M
- Keywords:
-
- Down-Converters;
- Downlinking;
- Low Noise;
- Microstrip Devices;
- Microwave Circuits;
- Resonators;
- Bipolar Transistors;
- Circuit Diagrams;
- Feedback Circuits;
- Field Effect Transistors;
- Intermediate Frequencies;
- Silicon Transistors;
- Electronics and Electrical Engineering