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Compact single‐feed circularly polarized aperture‐coupled stack antenna with minkowski‐island‐based fractal patch
Author(s) -
Hung TianFu,
Liu JiChyun,
Bor SheauShong,
Chen Chi Chiang
Publication year - 2012
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.27090
Subject(s) - optics , patch antenna , microstrip antenna , fractal antenna , miniaturization , physics , fractal , radiation pattern , antenna efficiency , antenna (radio) , engineering , telecommunications , mathematics , electrical engineering , mathematical analysis
The authors propose a compact single‐feed stack antenna consisting of a Minkowski‐island‐based (MIB) fractal patch with perturbation, an aperture‐coupled structure, and a straight‐strip feed line for circular polarization (CP) and unidirectional radiation applications. The MIB fractal configuration with second‐order iteration is embedded in the patch for miniaturization. The size reduction of 39.1% is achieved in contrast to the typical patch antenna. This fractal structure applies both dual‐mode and orthogonal mode effects simultaneously in the square patch to present bandwidth (BW) and CP characteristics. The stack antenna presents the desired axial ratio (AR) bands of 2.44 GHz with 3‐dB BW = 30 MHz (1.2%). The CP is demonstrated with AR spectrum, orthogonal modes distributions, and phase difference. The proposed antenna is successfully simulated and measured with frequency responses, radiation patterns, and current distributions. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2278–2283, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27090