Accession Number : AD0604250

Title :   MICROWAVE ACOUSTIC DELAY LINE AND RELATED ACTIVE DEVICES,

Corporate Author : MOTOROLA INC PHOENIX ARIZ

Report Date : JUL 1964

Pagination or Media Count : 159

Abstract : Generation of useful rf power outputs in CdS crystals was demonstrated with outputs up to 156 mw at the terminals without the need for transducers. High efficiency (3 db conversion loss) diffusion layer integral transducers were achieved in ultra high purity CdS crystals. Feasibility of complete functional devices from a single crystal of material was shown with integral delay lines and amplifiers. The use of thermal heat sinks and proper choice of crystal geometry were shown to overcome most of the obstacles to achievement of continuous operation of electroacoustic devices. Initial results included satisfactory operation of a CdS oscillator at a duty factor greater than 0.1. Efforts were continued with significant results in the general areas of more efficient electric/acoustic transducers, suitable drift field electrodes and negative resistance elements and circuits. (Author)

Descriptors :   (*DELAY LINES, MICROWAVE FREQUENCY), (*ACOUSTIC EQUIPMENT, SEMICONDUCTOR DEVICES), (*CADMIUM COMPOUNDS, SULFIDES), ELECTROACOUSTIC TRANSDUCERS, ENERGY CONVERSION, SINGLE CRYSTALS, MICROWAVE AMPLIFIERS, HEAT EXCHANGERS, CRYSTAL OSCILLATORS, ELECTRODES, NEGATIVE RESISTANCE CIRCUITS, HALL EFFECT, GENERATORS, PHONONS, ULTRASONIC RADIATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE