Ferrite Phase Shifters Using Stress Insensitive Materials
Abstract
This R&D program sponsored by the Naval Research Laboratory and being conducted by EMS Technologies, Inc., Norcross, Georgia, is focused toward achieving improved performance in microwave switching components via use of 'stress insensitive' microwave ferrite materials for applications where stable hysteresis characteristics of the materials are critical to the RF performance. The program, therefore, primarily addresses how to relieve or improve the magnetostrictive characteristics of the materials with emphasis on the specific application and demonstration of these materials in microwave switching components, particularly ferrite toroidal phase shifters. Material investigations were focused on Mn+3 substitutions in Yttrium-gadolinium iron garnet. These compounds were evaluated in dual toroid waveguide phase shifter structures with temperature, pressure & Rf power as variables Manganese substitution per formula unit for Fe+3 of 0.11 to 0.13 (2.2 to 2.6%) produced compounds which exhibited stable performance from magnetostrictive stresses in phaser structures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1993
- Accession Number
- ADA274639
Entities
People
- Gordon Harrison
- Paul Cox
- Pete Rodrigue
- Todd Vaughn