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Varactor diode integrated dipole-EBG base-station antenna: Enhancing tilted radiation pattern

Authors
Kim, IlkyuPark, Byung-chulLee, Jeong-Hae
Issue Date
Aug-2015
Publisher
WILEY-BLACKWELL
Keywords
electromagnetic bandgap; varactor diode; adaptive beamforming antenna; base-station antenna
Citation
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.57, no.8, pp.1794 - 1799
Journal Title
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
Volume
57
Number
8
Start Page
1794
End Page
1799
URI
https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/9594
DOI
10.1002/mop.29194
ISSN
0895-2477
Abstract
The new dipole-electromagnetic bandgap subarray antenna with an improved steerable beam is designed for base-station antennas. The proposed antenna consists of four dipole array antenna mounted on the tunable mushroom structure to steer element pattern. Whereas past array antenna utilizes fixed element pattern, beam steering element pattern is used to track the maximum of the array pattern to improve the scan loss of the array pattern. A dipole antenna on 4 x 4 mushroom structure is designed as a compact single element capable of steerable radiation within 0 degrees-27 degrees. The consistent gain around 11.5-12.1 dB is achieved at 3.3 GHz within 0 degrees-27 degrees with the tilted element pattern whereas the gain reduces to 9.4-10.2 dB with fixed element pattern. The antenna radiation pattern is simulated and measured varying capacitances. The measured bandwidth of the antenna covers 3.2-3.55 GHz, which is partial WIMAX band. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1794-1799, 2015
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