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Experimental Investigation of Closely Packed Spiral Element Yields Narrowband Design

Callaghan, Peter, Parker, Edward A. (1991) Experimental Investigation of Closely Packed Spiral Element Yields Narrowband Design. In: Antennas and Propagation, 1991. ICAP 91., Seventh International Conference on (IEE). . pp. 636-639. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)

Abstract

Arrays of conducting elements, or their complementary slots in a conducting plane have a plane wave transmission characteristic which varies with frequency. Such frequency selective surfaces (FSS) have a number of important applications in antennas and radomes and are often required to be curved. A current approach is to choose a plane FSS with the desired transmission response ideally insensitive to angle of incidence, and then to project this onto the curved surface. This projection will naturally cause a distortion of the FSS geometry with corresponding changes in the electrical performance. The effects of this distortion may be lessened by using a more closely packed array. Close packing has the additional advantage of increasing the separation of the useful array resonant bands from the onset of grating responses or, perhaps, surface waves trapped in the supporting dielectric substrate. One may define a measure of the packing density as the ratio of resonant wavelength to lattice periodicity. This parameter is of the order of 2 for simple dipole arrays, for example

Item Type: Conference or workshop item (Paper)
Uncontrolled keywords: INSPEC: CONTROLLED INDEXING antenna arrays electric variables measurement INSPEC: NON CONTROLLED INDEXING FSS array resonant bands closely packed array closely packed spiral element conducting elements array conducting plane curved surface dielectric substrate dipole arrays distortion electrical performance frequency selective surfaces grating responses lattice periodicity narrowband designs packing density plane wave transmission radomes ratio resonant wavelength surface waves transmission response
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Depositing User: Ted Parker
Date Deposited: 10 Mar 2014 09:36 UTC
Last Modified: 29 May 2019 11:57 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/38658 (The current URI for this page, for reference purposes)
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