Accession Number:

AD0260264

Title:

PRECISION RF SENSITIVITY STUDIES (EVALUATION OF MARK 1 SQUIB AND MARK 2 MOD 0 IGNITION ELEMENT)

Descriptive Note:

Corporate Author:

FRANKLIN INST PHILADELPHIA PA LABS FOR RESEARCH AND DEVELOPMENT

Personal Author(s):

Report Date:

1961-05-01

Pagination or Media Count:

1.0

Abstract:

An evaluation was made of matching devices to be used in the evaluation of the MARK 1 squib and the MARK 2 MOD 0 ignition element, as to sensitivity to RF. A discussion of losses in several types of coaxial impedance matching devices used in the 250 to 500 mc range is presented. The efficiency of three such devices is expressed in terms of the percentage of incident RF power delivered to a series of thermocouple terminations. All of the tuners are lossy when matching lower resistance thermocouple heaters. The efficiency of a tuner was on the order of 35 to 45 when used to match a 0.2 ohm load to the laboratory source. The percentage of incident power which reaches the thermocouple heaters when no matching is employed was investigated. A method for calculating the SWR introduced by these unmatched terminations is outlined. These data are then combined with matching efficiency data of the tuner to show correlation between SWR and tuner efficiency. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE