NDLI: Investigations on miniaturized endfire vertically polarized quasi-fractal log-periodic zigzag antenna

Content Provider	IEEE Xplore Digital Library
Author	Sharma, S.K. Shafai, L.
Copyright Year	1963
Abstract	This paper presents the investigations on a miniaturized vertically polarized traveling wave antenna for operation in the high frequency band (3-6 MHz), with a specific requirement of keeping its height near 1/8th of a wavelength. The antenna is desired to have a good endfire gain and front to back ratio, and small radiation levels in the vertical direction at broadside angle. A log-periodic Zigzag antenna (LPZA) has acceptable performance in both gain and polarization. Its height however is large, at about one wavelength (1/spl lambda//sub L/). The concept of fractal antenna is employed in this antenna to achieve the necessary height reduction to /spl lambda//sub L//8, while keeping its radiation characteristics nearly constant. Both single and dual arm quasifractal log-periodic zigzag antenna (QFLPZA) configurations are investigated, with a maximum antenna height of only 1/8th of a wavelength, showing the desired radiation characteristics, and a wide impedance bandwidth of 67%. This type of antenna may find applications in surveillance radar.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1957
Ending Page	1962
Page Count	6
File Size	503413
File Format	PDF
ISSN	0018926X
Volume Number	52
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polarization Radar antennas Frequency Directive antennas Performance gain Fractal antennas Impedance Bandwidth Surveillance Radar applications
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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