PREFERRED-CIRCUIT TECHNIQUES FOR VARACTOR-TUNED FILTERS
Abstract
This report describes an investigation of circuit techniques to minimize spurious responses in varactor-tuned filters. Design equations for the center frequency, bandwidth and insertion loss of single and multiple-resonator filters are presented. Series-resonant filters with one and two resonators were constructed and measurements of their performance characteristics were made. One- and two-resonator filters were also constructed using a pair of opposingly biased varactors (push-pull circuit) for each resonator. Measurements show that such a circuit can significantly reduce the second-harmonic generation and the response to a signal at one half the tuned frequency.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0808504
Entities
People
- Gerald Kannischak
- Solomon Hecht