MICROWAVE FERROELECTRIC PHASE SHIFTERS AND SWITCHES.
Abstract
Final data are given for UHF, L, and S band ferroelectric phase shifters and switches. The best ferroelectric material developed was (Pb0.315 Sr 0.685 Ti03). This material used in stripline structures resulted in UHF and L band phase shifters nominally with 0 to 200 degree relative phase shift and 1 to 3 db insertion loss over a 10% band. S band devices exhibit 0 to 200 degree relative phase shift with 1 to 5 db insertion loss. The same material used in multistub ferroelectric switches resulted in an L band three-stub switch with 40 db isolation and less than 1 db insertion loss over a 10% bandwidth. Two-and three-stub UHF band devices are believed to be capable of yielding similar results. S band devices are believed to be capable of giving 30 db isolation with less than 1 db insertion loss over a 10% bandwidth. New ferroelectric materials with loss factors less than 0.04 and change in capacitance delta C/C > 0.75 will lead to phase shifters and switches with significantly improved properties. Details and results of a computer analysis of the multistub switch are given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1965
- Accession Number
- AD0616754
Entities
Organizations
- Sperry Corporation