GUIDED MISSILE PROPULSION SYSTEM HAZARDS OF ELECTROMAGNETIC RADIATION TO ORDNANCE (HERO) RF CHARACTERISTICS OF ELECTRO-EXPLOSIVE DEVICES
Abstract
Three methods of irradiating squibs at microwave frequencies have been tried: in the waveguide, in the near field of a horn, and inside an expanding waveguide (in a horn). Two approaches are being tried to obtain such data: modification of the radar set electrically to force a short train of pulses to be generated at a much higher repetition rate such that the complete pulse train length is short compared to the EED thermal time constant, and design of the squib lead arrangement to couple more power, e.g., use dipoles arranged as reflectors and directors. Modification of the radar set for a higher repetition rate has not shown great promise. There are, however, a few modification possibilities yet to be explored. Insertion of elements in the horn to act as reflectors or directors have shown considerable promise. One arrangement of dipoles, for instance, gave a three fold power increase as measured by the temperature increase in a bare bridge wire. Aperture plates and a small copper receiving horn have been fabricated and are being tried out.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1964
- Accession Number
- AD0447137
Entities
Organizations
- Naval Ordnance Laboratory