NDLI: New design for ultra-wideband hemispherical helical antennas

Content Provider	IEEE Xplore Digital Library
Author	Alsawaha, H. Safaai-Jazi, A.
Copyright Year	2009
Description	Author affiliation: Virginia Tech Antenna Group, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, 24061, USA (Alsawaha, H.; Safaai-Jazi, A.)
Abstract	This study investigates a new design for the hemispherical heliacal antenna that provides significant improvement in bandwidth, while maintaining essentially the same directivity and half-power beamwidth of the basic hemispherical helical design. The proposed new design utilizes a wideband impedance matching technique and replaces the wire radiating element with a tapered metallic strip. This design provides an overall measured bandwidth of 24% at a center frequency of 3.35GHz. Over this bandwidth, the axial ratio is ≤ 3dB, the VSWR is ≤ 2 relative to a 50-ohm reference impedance, the directivity is about 9dB, and the half-power beamwidth is about 70°. This compact low-profile antenna is of considerable interest in ultra-wideband wireless communication systems.
Starting Page	1
Ending Page	4
File Size	1936468
Page Count	4
File Format	PDF
ISBN	9781424436477
ISSN	15223965
DOI	10.1109/APS.2009.5172286
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultra wideband technology Helical antennas Ultra wideband antennas Bandwidth Frequency Antenna radiation patterns Polarization Broadband antennas Wire Geometry
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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