Microwave Dielectric Resonator-Tuning.
Abstract
Dielectric resonators have applications as low-loss compact filters in the microwave region. Tuning characteristics of dielectric resonators that might allow for temperature compensation and frequency variability were investigated both theoretically and experimentally at L band. A secondary dielectric resonator that is offset in frequency from the tuned resonator provides a maximum tuning range of approximately 10 percent before an additional filter loss of 3 dB is incurred; the rate of tuning is slow since it is done by changing the resonator coupling (spacing). For fast tuning, a varactor is used in a coupled resonant circuit. Frequency changes can then be made in a time interval approaching 1/(filter bandwidth), but in this case the maximum tuning range before an additional filter loss of 3 dB is incurred is reduced to 2 percent of the filter frequency.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 03, 1974
- Accession Number
- ADA006689
Entities
People
- Martin R. Stiglitz
- Uve H. W. Lammers
Organizations
- Air Force Cambridge Research Laboratories