Electronically Tuned Linear VHF Preselector.
Abstract
RS. It summarizes the evaluation of ferrites and solid-state devices (primarily PIN diodes) for this application, and describes the performance of a digitally tunable, two resonator prototype filter incorporating PIN diode tuners. The prototype clearly demonstrated the feasibility of digitally tuned preselectors and indicated the following potential capabilities: High-speed digital tuning across the entire 30 to 80 MHz frequency range without the need for band-switching; Insertion loss on the order of 2 dB; Inherent frequency stability; Low average bias power requirement approximately 63 mW; RF power operation to at least 10 watts with second harmonic 80 dB below the fundamental; and Small size and lightweight, 8 cubic inches and 7 ounces, respectively. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1973
- Accession Number
- AD0768217
Entities
People
- E. Markard