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An asymmetrical feed arrangement for improved impedance bandwidth of planar monopole antennas
Author(s) -
Ammann M. J.,
Chen Zhi Ning
Publication year - 2003
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.11313
Subject(s) - planar , bandwidth (computing) , microwave , electrical impedance , offset (computer science) , engineering , radiation pattern , electrical engineering , input impedance , monopole antenna , physics , optics , acoustics , antenna (radio) , telecommunications , computer science , computer graphics (images) , programming language
Abstract The use of an asymmetrical feed probe is shown to significantly increase the impedance bandwidth of a square planar monopole antenna. The feed probe is offset from the center of the planar element. The optimum location of the feed probe is shown to increase the impedance bandwidth by a factor of 3.4. The effect of the asymmetry on radiation patterns is also shown. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 156–158, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11313