Printer Friendly

NIST performs electromagnetic shielding effectiveness tests on a commercial aircraft. (News Briefs).

NIST recently performed electromagnetic shielding effectiveness tests on a commercial aircraft using NIST designed broadband horn antennas and specialized time domain measurement methodology. The information gained in this effort is being used to develop low-cost and efficient measurement techniques for in situ testing of aircraft.

Shielding effectiveness measurements are performed to quantify the electromagnetic fields coupled into an aircraft from an external source, or conversely, internal to external coupling. It is best is to measure an aircraft at an open area test site. However, taking an aircraft out of the production chain is extremely costly for the aircraft industry. Continuous wave measurements made in a hanger or production facility suffer from unwanted reflections that make data interpretation difficult. Thus, the aircraft industry is interested in time domain methods that enable extraneous reflections due to hanger walls to be windowed out using gating techniques.

NIST engineers used time domain methodology developed at NIST to measure an aircraft in a paint hanger along the production line. In addition, NIST has developed a joint time-frequency analysis tool that will be used to extract critical cavity decay characteristics useful in aircraft shielding studies. The Naval Surface Weapons Center and a private company sponsor this effort.

CONTACT: Robert Johnk, (303) 497-3737; johnk@boulder.nist.gov.
COPYRIGHT 2002 National Institute of Standards and Technology
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2002, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

 Reader Opinion

Title:

Comment:



 

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:National Institute of Standards and Technology
Publication:Journal of Research of the National Institute of Standards and Technology
Article Type:Brief Article
Geographic Code:1USA
Date:May 1, 2002
Words:210
Previous Article:New method to measure mass distribution of polyolefins. (News Briefs).
Next Article:NIST open new special test measurement service for 2.92 mm coaxial power detectors. (News Briefs).
Topics:


Related Articles
INTERNET-ASSISTED REMOTE CALIBRATION DEMONSTRATED.
Note to Readers.
Message From Past Chief Editor.
NEW NIST PRACTICE GUIDE ON ROCKWELL HARDNESS TESTING AVAILABLE.
NIST PUBLISHES SPECIAL PUBLICATION 250-58: CALIBRATION OF X-RAY AND GAMMA-RAY MEASURING INSTRUMENTS.
Message from the chief editor.
Foreword.
Improved radiometric standards lead to high-accuracy measurements. (News Briefs).
NIST publishes 2001 Edition of SP 330. (News Briefs).
Internet-assisted, on-site special test performed by NIST. (News Briefs).

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters