An Ultra-Low Phase Noise Multi-Frequency Source
Abstract
Design and construction of a prototype X-band pulse-Doppler radar having 90 dB of dynamic range (after pulse integration and into a 1 MHz band) calls for a ultra-low phase noise multi-frequency source. The generated frequencies for local oscillators (LOs), waveform generation, and data acquisition typically cover the spectrum from HF to X-band and must be coherent. However, using a separate synthesizer for each required frequency would be both costly and cumbersome. This report describes an inexpensive, lightweight, compact, low phase-noise source that coherently generates, within a single chassis, all the frequencies required of a high-performance radar system. Moreover, the multi-frequency source has a tunable output providing frequencies from UHF to K-band. This report emphasizes "how to build" rather than detailed design theory. However, the report does present phase-noise test results and suggested improvements for a second design iteration. The multi-frequency source is versatile and can also be used for bench testing RF and microwave components.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 13, 1998
- Accession Number
- ADA357015
Entities
People
- Brian Connolly
- Jean De Graaf
Organizations
- United States Naval Research Laboratory