NDLI: Analysis of the Equiangular Spiral Antenna on a Dielectric Substrate

Content Provider	IEEE Xplore Digital Library
Author	McFadden, M. Scott, W.R.
Copyright Year	1963
Abstract	While the first equiangular spiral antennas were slots cut from a thin conductive sheet, the widespread availability of cheap photoetching fabrication has made it more common for the spiral to be printed on a dielectric substrate. This paper examines the effects of the substrate on the spiral's performance. The finite-difference time-domain (FDTD) technique is used to model the spiral over a range of configurations. The results are used to construct a design graph that shows that the substrate significantly affects the impedance of the antenna. The results also show that the substrate can negatively impact the bore-sight gain and radiation patterns. Measurements from two spirals are used to verify the accuracy of the numerical model.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3163
Ending Page	3171
Page Count	9
File Size	809316
File Format	PDF
ISSN	0018926X
Volume Number	55
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spirals Dielectric substrates Finite difference methods Time domain analysis Slot antennas Availability Fabrication Impedance Antenna radiation patterns Antenna measurements spiral antennas Broadband antennas electromagnetic analysis
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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