Accession Number : AD0649783

Title :   BROADBAND TRANSMITTER TECHNIQUES.

Descriptive Note : Technical memo.,

Corporate Author : SYLVANIA ELECTRONIC SYSTEMS-WEST MOUNTAIN VIEW CALIF ELECTRONIC DEFENSE LABS

Personal Author(s) : Doherty,W. ; Hatley,W.

Report Date : APR 1967

Pagination or Media Count : 31

Abstract : Three techniques for developing power levels in excess of 100-watts over wide bandwidths in the VHF frequency range were investigated; (1) direct amplification at power output, (2) generation of power at lower frequency and use of passive multiplyers, and (3) use of active multiplying devices to provide both amplification and frequency multiplication. Third technique was most successful and an amplifier having 100-watt, at 100-MHz, with 20% bandwidth was constructed. However, limiting factor was impedance match at the input to the high power transistor. Recommend efforts be directed to computer techniques to affect impedance match.

Descriptors :   (*BANDWIDTH, POWER), (*TRANSFORMERS, BROADBAND), STABILITY, COMPUTERS, IMPEDANCE, TRANSISTORS, VERY HIGH FREQUENCY, FREQUENCY MULTIPLIERS, ATTENUATION, AMPLIFIERS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE