Schottky diode mm detectors with improved sensitivity and dynamic range
Abstract
A detector which features a low-barrier Si Schottky diode is discussed. The unbiased diode has a sensitivity of -60 dBm and a range of 50 dB at 95 GHz, and fixed tuning yields a sensitivity within 2 dB from 75-110 GHz. A limitation of the low-barrier diode is a reduction in the low-level sensitivity by 16 dB under a 100 kilohms load. Use of the diode with a video impedance of 120 kilohms enables the offset voltage to be nulled with an appropriate control. Operation of the diode in a waveguide mount for use as a mixer is described, along with detector rectification.
- Publication:
-
Microwave Journal
- Pub Date:
- December 1981
- Bibcode:
- 1981MiJo...24...67K
- Keywords:
-
- Microwave Equipment;
- Millimeter Waves;
- Schottky Diodes;
- Signal Detectors;
- Dynamic Characteristics;
- Semiconductor Devices;
- Sensitivity;
- Electronics and Electrical Engineering