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Noise spectrum characteristics of low-noise microwave tubes and solid state devices

1966; Institute of Electrical and Electronics Engineers; Volume: 54; Issue: 2 Linguagem: Inglês

10.1109/proc.1966.4639

1558-2256

Steven L. Johnson, Bob H. Smith, D. A. Calder,

Radio Wave Propagation Studies

In this paper experimental data on the FM and AM noise of low-noise microwave tubes, "solid-state klystrons," and solid-state chains of the types used in Doppler radars are presented. The tube types include magnetrons, klystrons, and triodes. Data on solid-state chains of the type consisting of a VHF crystal-controlled transistor oscillator, followed by a VHF transistor power amplifier, and a varactor frequency multiplier are also presented. The spectral shape of the solid-state chain is shown to differ from those of the microwave tubes and that of the "solid-state klystron." Comparisons are made between the various devices.