By Topic

The effects of some mechanical uncertainties on the performance of welded and machined phased array antennas

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
$31 $31
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

4 Author(s)
Eskelinen, P. ; Helsinki Univ. of Technol., Espoo, Finland ; Eskelinen, H. ; Eskelinen, A. ; Tilhonen, K.

Cost-effective manufacturing possibilities and inherent mechanical strength suggest the use of sheet metal constructions in large-size phased array antennas up to 3 GHz and above, applied both for civilian and military communication and radar systems. Constructional defects cause phase and amplitude errors which impair the radiation pattern by introducing non-symmetrical lobes and by filling wanted minima possibly up to -10 dB or creating phantom ones. Random phase deviations up to 60 degrees have been measured and gain variations of 2-3 dB are not rare. Typical faults include bends in the sheet structure due to welding and improperly aligned transmission line junctions in internal machined modules. A mathematical real-time compensation of most of these errors is feasible although in some cases this does not cure the actual fault but just masks the problem

Published in:

Antennas and Propagation, 2001. Eleventh International Conference on (IEE Conf. Publ. No. 480)  (Volume:2 )

Date of Conference: