By Topic

Modal excitation of the EMPTAC using multiple antennae

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
L. O. Hoeft ; BDM Int., Inc., Albuquerque, NM, USA ; J. S. Hofstra ; W. D. Prather

Modal excitation of a large aircraft was demonstrated by attaching electrically short monopole antennas to the aircraft's extremities (nose, tail, and wing tips) and feeding these antennas in-phase or out-of-phase using appropriate transformers and/or power amplifiers. Surface magnetic fields were measured at various points on the aircraft. Relatively pure single mode excitation was demonstrated for the lowest frequency modes. The resonances were much broader than those predicted by theory and the mode structure seemed to disappear for frequencies greater than four times the lowest resonant frequencies. The resonant frequencies were significantly different from those predicted by theory. It is shown that theory frequently incorrectly predicts this frequency by as much as 40%

Published in:

Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on

Date of Conference:

9-13 Aug 1993