Nanosecond LSA Microwave Transmitter.

Abstract

The Limited Space-charge Accumulation (LSA) mode in n-type GaAs has been considered as a source of high peak power at microwave frequencies. However, because the microwave oscillation is that of a relaxation oscillator, the frequency varies rapidly with bias voltage and temperature. This presents a problem when a high degree of frequency stability is required, and must be compensated for. Furthermore, the thicker LSA devices cause a larger thermal heating and must operate at low duty cycles. However, one can trade duty cycle for device thickness and accordingly peak and average power (20 Watts and 200 Milliwatts) is made. The methods of frequency stabilization are investigated and the one yielding the highest degree of frequency stability is investigated. A third area investigated is that of a high PRF pulser to yield the 1% duty cycle to be used. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1974
Accession Number
AD0776809

Entities

People

  • William O. Camp Jr

Tags

DTIC Thesaurus Topics

  • Frequency
  • Microwave Frequency
  • Microwaves
  • Nanosecond Time
  • Oscillation
  • Oscillators
  • Peak Power
  • Power
  • Relaxation Oscillators
  • Space Charge
  • Thickness
  • Transmitters

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Electronics Engineering
  • Semiconductor Device Technology

Technology Areas

  • Space
  • Space - Hall-Effect Thruster