NDLI: On the dispersive properties of the conical spiral antenna and its use for pulsed radiation

Content Provider	IEEE Xplore Digital Library
Author	Hertel, T.W. Smith, G.S.
Copyright Year	1963
Abstract	Conical spiral antennas can have an input impedance and gain that are nearly frequency independent over a wide bandwidth. However, these antennas normally have dispersive properties that produce significant distortion when they are used to radiate a pulse. We examine this dispersion in detail and the possibility of compensating for the dispersion so that the antenna can be used for pulse radiation. First, a simple, qualitative model for this antenna is described. This model provides physical insight into the causes for the dispersion. Next, the antenna is examined using an accurate, full electromagnetic analysis done with the finite-difference time-domain method. Results from this analysis support the conclusions reached with the simple model and provide additional insight into the dispersion. Finally, an approach for compensating for the dispersion in the antenna is described, and the interesting features of the pulse radiated from this antenna, after compensation, are discussed.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1426
Ending Page	1433
Page Count	8
File Size	979075
File Format	PDF
ISSN	0018926X
Volume Number	51
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dispersion Spirals Frequency Bandwidth Impedance Electromagnetic analysis Finite difference methods Time domain analysis Electromagnetic radiation
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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