Abstract :
Frequency Selectors THE SCIENCE of communications is built on waves, amplifiers, and frequency selectors, the last of these being the subject of this monograph. Half a century ago, the electrical resonator and the wave filter were in their early stages of evolution. As they became more familiar, they merged into a unified philosophy embracing frequency selectors of all kinds, not merely electrical but also mechanical, acoustical, etc. A family of frequency selectors having certain desirable properties is the immediate topic.
