Precision RF Sensitivities Studies (Evaluations OF MARK 1 MOD 0 Squib and MARK 2 MOD 0 Ignition Element)
Abstract
The RF sensitivity of the MARK 1 MOD 0 squib and MARK 2 MOD 0 ignition element was determined by newly developed precision firing techniques. Data from 5 to 1000 Mc CW are obtained, differing little from the dc power sensitivity determined from 10-second constant current pulse data. Studies of system losses indicated that special matching devices would be desirable, for limiting to reasonable values the power lost in the RF plumbing. As a consequence, a novel shorted stub was developed for use at the higher frequencies. Low-loss lumped-parameter tuning networks were fabricated for the lower frequencies. Results with precision never before duplicated were obtained by use of a special calibration pro that was developed. A photoconductive cell is focused onto the exposed bridgewire of the device to be tested and its response is calibrated against a steady-state dc power input. Following this, RF is fed to the same device and the ratio of the RF to dc level for the same bridgewire illumination is taken as the system calibration factor. In so doing, all losses between the point at which we measure input RF power and the bridge element are lumped.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 15, 1962
- Accession Number
- AD0409527
Entities
People
- Norman P. Faunce
- Paul F. Mohrbach
- Robert F. Wood
Organizations
- Franklin Institute