Electromagnetic considerations in the design of high performance large sandwich radomes

Reuven Shavit, Adam P. Smolski, Crit J. Cook, D. J. MacKnight

Research output: Contribution to journalConference articlepeer-review

Abstract

It is shown that the reduction of the scattering effect from the seams in large sandwich radomes can be obtained by minimizing the scattering level from the individual seams and optimizing the radome geometry. The scattering from an untuned seam increases with frequency and is related to the polarization current induced in the seam. This effect can be characterized by the induced field ratio (IFR) and the seam scattering pattern. The seam effect on the insertion phase delay (IPD) and the transmission losses (TLs) of the panel for vertical and horizontal polarization is shown. It is observed that for normal incidence the IPD caused by the panel is 26° and the untuned seam causes an additional IPD of 13°. To reduce the IPD caused by the seam, tuning techniques, such as insertion of conductive strips in the seam, are used. The total scattering effect from all the seams in front of the antenna aperture is computed by superposition of all scattering effects from the individual seams. Optimization of the radome geometry takes into consideration factors such as minimization of the total seam length, increase in panel dimensions, minimization of the total number of parallel seams, and uniform seam density throughout the antenna scan angles.

Original languageEnglish
Pages (from-to)1196-1199
Number of pages4
JournalIEEE Antennas and Propagation Society, AP-S International Symposium (Digest)
Volume3
StatePublished - 1 Dec 1990
Externally publishedYes
Event1990 Antennas and Propagation Symposium Digest - Dallas, TX, USA
Duration: 7 May 199011 May 1990

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