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Bidirectional rectangular ring antenna for coal mine/tunnel communication
Author(s) -
Liu Wendong,
Zhang Zhijun,
Feng Zhenghe
Publication year - 2013
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.27552
Subject(s) - microwave , bandwidth (computing) , antenna (radio) , engineering , radiation pattern , radiation , electrical engineering , coal mining , acoustics , materials science , optics , physics , telecommunications , coal , waste management
A bidirectional antenna, which is useful in coal mine or tunnel wireless communication, is proposed in this article. The antenna consists of a probe excited rectangular ring. The dimensions of the rectangular ring are 147 × 20 × 40 mm 3 (0.45λ × 0.06λ × 0.12λ). The length of the feeding probe is 15 mm (0.045λ). The measured −10 dB bandwidth is ∼14 MHz (910–924 MHz), and the corresponding peak gain is 5.8 dBi. Radiation patterns are measured and compared to the simulation results. The proposed bidirectional antenna has the advantages of low cost, low‐profile, easy fabrication, small cross‐section to the ventilation direction, and good bidirectional radiation. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1412–1416, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27552