Avalanche diode microwave noise generation experiments

This paper describes some experimental studies of the noise properties of avalanche diodes at X-band frequencies. The results obtained indicate that the diode has a potential application as a broad band microwave noise source with a noise temperature from 15 dB to 25 dB greater than an argon gas discharge tube, depending on the bandwidth of the diode circuit. These results were obtained independently but corroborate the recently reported results of Val´d-Perlov, Krasilov, and Tager.