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Double dipole antenna for dual‐band wireless local area networks applications
Author(s) -
Steyn Johanna M.,
Odendaal Johann W.,
Joubert Johan
Publication year - 2009
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.24540
Subject(s) - dipole antenna , multi band device , standing wave ratio , wi fi , electrical engineering , radiation pattern , antenna gain , microwave , physics , antenna measurement , monopole antenna , ground plane , optics , antenna (radio) , electronic engineering , engineering , telecommunications , wireless , antenna efficiency , microstrip antenna , wireless network
A double‐dipole antenna design is proposed for wireless local area network (WLAN) applications. Two parallel dipoles are used to facilitate operation in both the standard WLAN frequency bands (IEEE 802.11b and IEEE 802.11a) simultaneously. The lower band dipole is rhombus shaped and radiates above a planar ground plane, whereas radiation from the rectangular higher band dipole is directed through the use of a passive director. The antenna is characterized in terms of impedance bandwidth, gain and radiation patterns through simulations and measurements. The design addresses the need for dual‐band operation, whereas delivering directional radiation patterns with adequate gain, low cross‐polarization, and good front‐to‐back ratio. The 2.4/5 GHz WLAN bands are covered with an impedance bandwidth of 17.8 and 26.4%, respectively, for a VSWR better than 2:1. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2034–2038, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24540