LOW FREQUENCY GYRATOR DEVELOPMENT
Abstract
Two electromechanical (em) gyrator designs, with coupled piezoelectric and piezomagnetic transducers, were used to cover the frequency range from 375 cps to 1.1 Mc, with bandwidths from 1.0 to 3.7% and power insertion losses below 2 db except at the extreme ends of the range. By combining piezoelectric and piezomagnetic transducers with complementary frequency-temperature dependencies, em gyrators were obtained with characteristics stable within ! 0.1% over the -40 to + 100 C range. Neutralization of em gyrators to form isolators was accomplished by adding appropriate reciprocal networks in parallel with the em gyrator to cancel one of its transfer admittances at one or more frequencies. Stop direction characteristics, ranging from a single notch of high rejection to those of broadband isolators with 20 db of isolation over the 9% bandwidth of the pass direction, were obtained with forward power insertion losses of 1 to 3 db. The em gyrator can also form an effective 3 channel circulator. Low frequency Hall effect gyrators have been investigated as multiterminal devices. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1962
- Accession Number
- AD0276845
Entities
People
- Damian Curran
- J.h. Silverman
Organizations
- Rome Laboratory