SOLID-STATE CIRCUITS
Abstract
Measurements of linewidth and anisotropy were made on a 600 4PiMs Ga- YIG single-crystal ferrite. The linewidth behaved normally with respect to its variation with crystal axis orientation; that is, the linewidths were maximum (7.8 oersteds) with the external fields along the easy axis and minimum (3.7 oersteds) along the hard axis. A low-threshold varactor limiter was designed and constructed using a varactor-loaded single-tuned circuit. By using the field build up characteristic of a highly regenerative circuit, threshold-limiting levels of less than -20 dbm were achieved. Investigation of the performance of commercially available three-port C-band circulators, relative to the theoretical performance expected from Bosma's analysis, was continued. Modifications of Bosma's equations were made to allow for negative mueues and extended frequency variation. The effect of imperfectly matching a circulator, by the technique derived earlier in the project, was analyzed. An analysis of the input circuit of a one-port parametric amplifier (using a simplified series equivalent circuit) was performed, from which phase shift versus frequency as a function of gain was obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1963
- Accession Number
- AD0403475
Entities
People
- E. W. Sard
- K. Siegel
- S. Hamilton
- S. Okwit
- W. W. Heinz