80-dB Microwave Noise from an Avalanche Transistor Circuit

  • Gytis Mykolaitis Vilnius Gediminas Technical University
  • Saulius Kersulis
  • Skaidra Bumeliene
  • Arunas Tamasevicius

Abstract

Extremely high ‘excess noise ratio’ of 80 dB is observed from an avalanche transistor circuit, operating in a random pulse mode. Broadband noise spectrum measured from 30 MHz to 1 GHz exhibits good flatness with the nonuniformity of only  1 dB. Experiments have been performed with the silicon bipolar junction microwave transistors. An analog circuit model is proposed and investigated.

DOI: http://dx.doi.org/10.5755/j01.eee.21.5.13324

Published
2015-10-03
Section
HIGH FREQUENCY TECHNOLOGY, MICROWAVES