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Bandwidth limitation of two‐port fed and self‐phased quadrifilar helix antennas
Author(s) -
Amin M.,
Cahill R.
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20886
Subject(s) - helical antenna , microwave , bandwidth (computing) , helix (gastropod) , engineering , electrical engineering , physics , electronic engineering , electrical impedance , directional antenna , antenna (radio) , telecommunications , slot antenna , ecology , snail , biology
The bandwidth of a resonant quadrifilar helix antenna (QHA) is shown to be strongly dependent on the design of the feed network. In this paper, we compare the impedance and radiation‐pattern performance of two QHAs driven by different feed arrangements. A qualitative explanation for the difference in the behaviour of the antenna is given by observing the amplitude and phase distribution of the current in the helices. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 11–15, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20886