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Design of modified ground square‐shaped fractal antenna for UWB applications
Author(s) -
Kumar Raj,
Hake Shahadev
Publication year - 2011
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.26365
Subject(s) - fractal antenna , ground plane , microwave , return loss , radiation pattern , fractal , antenna (radio) , optics , coplanar waveguide , ultra wideband , electronic engineering , monopole antenna , acoustics , coaxial antenna , electrical engineering , engineering , telecommunications , physics , mathematics , mathematical analysis
This article presents the design of modified ground square‐shaped fractal antenna. The prototype antenna is designed and fabricated on FR4 substrate of dielectric constant ε r = 4.3 and thickness h = 1.53 mm. The proposed antenna is excited using coplanar waveguide feed. The experimental result of square‐shaped fractal antenna exhibits the excellent ultra‐wideband (UWB) characteristic corresponding to impedance bandwidth of 148.13 % from 2.235 to 15.0 GHz, exceeding Federal Communication Commission (FCC) frequency range with a return‐loss performance S 11 = −10 dB. The simulated results are in good agreement with the experimental results. The experimental radiation patterns of this square‐shaped fractal antenna are omni‐directional in H‐plane and bidirectional in E‐plane. This proposed antenna can be useful for UWB system, microwave imaging and vehicular radar. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2589–2592, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26365