BROADBAND S-BAND REACTANCE AMPLIFIER
Abstract
Work was continued on a low noise broadband S-band reactance amplifier. A parametric upconverter fabricated in reduced height X-band waveguide was extensively tested. Results were negative and efforts were shifted to upconverters using a full height X-band waveguide. A number of diode mounts were te ted and parametric upconver ers using these mounts are currently being developed. The existence of a transmission passband for the mount-diode combination at the operating frequencies appe r as a necessary condition for broadband operation. The same broadband upconverter were operated as one-port circulator-coupled parametric amplifiers with performance comparable to that of the unconverters. The balanced 2-diode parametric amplifier has provided gain of 3-6 db over a 1400 mc band; however, oscillations at some frequencies were observed. Si ce the balanced scheme yielded the most broadband performance, major efforts were devoted to this approach; and efforts were limited to single-port experiments on those upconverter structures which have exhibited good gain and bandwidth as lower sideb nd upconvert rs. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1961
- Accession Number
- AD0271944
Entities
People
- B. Bossard
- R. Pettai