Harmonic evaluation of transferred electron devices
Abstract
The research on the harmonic evaluation of TED's falls into three main areas; design aspects of mounting structures, computer simulation of the interaction between TED and mounting structure and the effect of heat generation on performance. A novel two-port oscillator mount for simultaneous but independent tuning, loading and monitoring of the fundamental oscillation and its second harmonic was designed. The assembly provides a means for experimentally studying efficiency enhancement by harmonic tuning and conditions for optimizing the ratio of wanted to unwanted components in the oscillator output. Computer simulation of the interaction between TED and mounting structure was developed and used for operation involving fundamental and harmonic components of both voltage and current. Device-circuit interaction that gives rise to harmonic and other unwanted components of output are further compounded when the bias on the device is pulsed. The effect of the resulting time-varying temperature profile in the active layer of the device was investigated both experimentally and theoretically.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1974
- Bibcode:
- 1974STIN...7528350G
- Keywords:
-
- Electron Transfer;
- Microwave Oscillators;
- Semiconductor Devices;
- Computerized Simulation;
- Mounting;
- Performance Tests;
- Signal To Noise Ratios;
- Electronics and Electrical Engineering