Broadband omnidirectional and miniature fold-up discone antenna in VHF/UHF band

Javadzadeh, S. M. H ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1080/02726343.2012.686834
  3. Publisher: 2012
  4. Abstract:
  5. In this article, a novel miniature broadband omnidirectional antenna is proposed. This antenna is suitable to use in vehicles, especially in unmanned aerial vehicles, since it will be folded in order to reduce its size when the unmanned aerial vehicle lands. A special kind of wire discone antenna is chosen to achieve all desired goals. Passive broadband impedance matching at the input of the antenna improves the voltage standing-wave ratio. A telescopic fiberglass axis is used in the antenna structure in order to reduce size and increase wind resistance. The assessment of the novel structure in implementing the antenna is confirmed by experimental measurements. The measurement results reveal the preference of the new techniques over the existing approaches, showing voltage standing-wave ratio better than 2.1 and gain between 5.9 and 2 dBi in a total band of 30-500 MHz
  6. Keywords:
  7. Fold-up antenna ; Small-size antenna ; VHF/UHF antenna ; Wire discone antenna ; Antenna structures ; Broad-band antenna ; Broadband impedance ; Broadband omnidirectional antennas ; Experimental measurements ; In-vehicle ; Measurement results ; Novel structures ; VHF/UHF ; Voltage standing-wave ratio ; Wind resistance ; Glass fibers ; Unmanned aerial vehicles (UAV) ; Wire ; Omnidirectional antennas
  8. Source: Electromagnetics ; Volume 32, Issue 5 , Jul , 2012 , Pages 266-273 ; 02726343 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1080/02726343.2012.686834