Manufacturing Methods and Technology Measure for Arc-Plasma-Sprayed Phase-Shifter Elements.
Abstract
The Phased-array radar antenna is now well established as a means of achieving agile search and multi-target tracking in the current and projected military government. Each new system with its phased-array antenna has many thousands of radiating elements. Since each element contains a ferrite phase shifter, it is appropriate to develop manufacturing methods and processes that will minimize the cost of each phase shifter. The purpose of this program is to develop a manufacturing capability for producing a c-band phase-shifter element by arc-plasma spraying of a lithium-titanium ferrite onto a dielectric substrate. In this process, a high temperature diffusion bond between the toroidal envelope and dielectric core permanently mates the ceramic parts, thus eliminating the need for any joining material. The switching wires are threaded through interior slots after final machining and can be replaced or renewed at any time. The primary objective is to produce the phase control element as a finished composition with acceptable microwave properties and a reasonably high yield. To achieve sound composites, one of the properties needing constant monitoring is the match in thermal expansion coefficient between the ferrite coating and the dielectric. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADA054271
Entities
People
- D. Masse
- H. J. Vanhook
- J. J. Green
- R. J. Maher
Organizations
- RTX