UHF PHASE SHIFTER
Abstract
The exploratory development is described of a slow-wave UHF ferrite phase shifter. The real and imaginary parts of the initial permeability are given for a large percentage of the commercially available ferrites and garnets. The frequency range of the spectra is 400 to 1000 megacycles. From the results of the spectra, the materials are categorized into one or more of five possible low-loss phase shifting regions. The adaptability of periodic coaxial, periodic strip, and helical transmission lines for use in UHF ferrite phase shifters is discussed. In general, it was found that the periodic strip transmission line was best suited for use in a UHF ferrite phase shifter. It is also concluded that, even though considerable gains in the phase shift per unit can be realized with slowvelocity structures, it does not necessarily follow that better phase shifters can be realized through their use. A short discussion on the expected behavior of the absorption loss for variations in ambient temperature is presented and experimental data are given to verify the theory. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 1961
- Accession Number
- AD0262711
Entities
People
- D.e. Allen
- N.g. Sakiotis
Organizations
- Motorola Mobility