Title :
Synthesis of high-stability 4th-order single-sideband crystal lattice filters
Author_Institution :
Polytechnic of the South Bank, Department of Electrical & Electronic Engineering, London, UK
fDate :
10/1/1974 12:00:00 AM
Abstract :
A lowpass antimetric ladder network is transformed into a single-lattice single-sideband crystal filter using simple network equivalences and an asymmetrical frequency transformation. A methodis then given for altering the phase shift independent of both the attenuation and network configuration, and applied so that a crystal in each lattice arm resonates at the frequency of infinite attenuation. Transferring these crystals to outside the lattice results in single-sideband filters of high stability. A frequency transformation involving two attenuation poles is given in an Appendix.
Keywords :
crystal filters; ladder networks; network synthesis; stability; asymmetrical frequency transformation; attenuation poles; crystal filters; lowpass antimetric ladder network; network synthesis; single sideband crystal lattice filters; stability;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1974.0246
