Study of I.F. Transformers for Single Sideband Operation
Author: Cohn, George I. Author: Weber, Erwin W. Author: Yuen, Paul C. Corporate Author: Electronics Research Laboratory, Illinois Institute of Technology Date of Publication: 1961-01 Pages: 45 Contract: DA 36-039-sc-78342 PB Number: PB162810 AD Number: AD0254028 Original AD Number: AD-254028Contrails does not possess a copy of this report. Click here to offer Contrails a donation of this report
Abstract: Research continued on the evaluation of electromechanical filters and the design and testing of filters using ferroelectric ceramic resonators with coils and capacitors. The extension of electromechanical filters to higher center frequencies is discussed. The major difficulties encountered in an attempt to do this are transducer loss and reduction in size of resonator elements. Several filters with fifth order Tchebyscheff characteristics were designed. The one designed for 442.5 kc was breadboarded and tested. The resulting network had a 2.8 db insertion loss in the pass band and 4 db below the center frequency response had a bandwidth of 3 kc. The attenuation curve exhibited a non symmetrical shape.