Millimeter wave monolithic schottky diode imaging arrays
Abstract
Planar Schottky diodes are integrated with bow-tie antennas to form a one-dimensional array. The energy is focused onto the antennas through a silicon lens placed on the back of the gallium-arsenide substrate. A polystyrene cap on the silicon lens reduces the reflection loss. A self-aligning process with proton isolation has been developed to make the planar Schottky diodes with a 1.1-THz zero-bias cutoff frequency. The antenna coupling efficiency and imaging properties of the system are studied by video detection measurements at 94 GHz. As a heterodyne receiver, a double-sideband mixer conversion loss of 11.2 dB and noise temperature of 3770°K have been achieved at a local oscillator frequency of 91 GHz. Of this loss, 6.2 dB is attributed to the optical system and the antenna.
- Publication:
-
International Journal of Infrared and Millimeter Waves
- Pub Date:
- October 1985
- DOI:
- Bibcode:
- 1985IJIMW...6..981Z
- Keywords:
-
- Antenna Arrays;
- Antenna Design;
- Imaging Techniques;
- Millimeter Waves;
- Schottky Diodes;
- Video Signals;
- Detection;
- Frequency Response;
- Gallium Arsenides;
- Heterodyning;
- Plasma Diagnostics;
- Ray Tracing;
- Instrumentation and Photography;
- Reflection Loss;
- Coupling Efficiency;
- Schottky Diode;
- Local Oscillator;
- Noise Temperature