Accession Number:

ADA200082

Title:

A Spiral-Transmission-Line Technique for Detecting Slot Apertures in Shield Enclosures

Descriptive Note:

Corporate Author:

AIR FORCE WEAPONS LAB KIRTLAND AFB NM

Personal Author(s):

Report Date:

1987-12-31

Pagination or Media Count:

12.0

Abstract:

This note presents another concept, SPIRA, for monitoring the integrity of a shield enclosure. In this concept a helically wound conductor is used as a transmission line in conjunction with the shield enclosure. This type of structure produces an external magnetic field with a strong component parallel to the axis of the helix. This allows the helix to lie parallel to potential slot apertures in the shield enclosure. A similar helix is used on the other side of the shield wall to monitor penetrating magnetic fields.

Subject Categories:

  • Electrical and Electronic Equipment
  • Electromagnetic Shielding

Distribution Statement:

APPROVED FOR PUBLIC RELEASE