NDLI: Size reduction of a folded conical helix antenna

Content Provider	IEEE Xplore Digital Library
Author	Rogers, R.L. Buhl, D.P. Hosung Choo Hao Ling
Copyright Year	2002
Description	Author affiliation: Appl. Res. Lab., Texas Univ., Austin, TX, USA (Rogers, R.L.; Buhl, D.P.)
Abstract	A wire antenna that utilizes spiraling and folding has been reported by Dobbins, and Rogers (see IEEE Trans. Antennas and Propagat., Dec. 2001). We have shown that this antenna, called the folded conical helix antenna (FLEX), performs very well as an electrically small monopole antenna. Using the figure of merit proposed in this work we can quantitatively compare this antenna to other types of electrically small antennas in different size ranges and efficiencies. This highest figure of merit is achieved by the electrically smallest antenna, which has a size of kr=0.1, and it appears to be considerably higher than might be expected. Two different efficiency measurements show reasonably consistent results, and the measured gain bandwidth is consistent with the impedance bandwidth. Therefore, the FLEX antenna should be a practical and broadband compact antenna for the MF, HF, and VHF frequency ranges.
Starting Page	34
Ending Page	37
File Size	195646
Page Count	4
File Format	PDF
ISBN	0780373308
DOI	10.1109/APS.2002.1016920
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-06-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Helical antennas Antennas and propagation Broadband antennas Antenna measurements Impedance measurement Gain measurement Bandwidth Wire Hafnium Frequency
Content Type	Text
Resource Type	Article

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