A Nonbalancing End-Fire Microstrip Dipole With Periodic-Offset DSPSL Substrate

A nonbalancing microstrip dipole with end-fire capability is presented. The proposed antenna consists of a simple microstrip-fed dipole with a periodic-offset double-sided parallel-strip line (DSPSL) substrate, which is used to replace the balun of a conventional end-fire antenna. The periodic-offse...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2017-05, Vol.65 (5), p.2661-2665
Hauptverfasser: Li, Yuanxin, Xu, Huansong, Wu, Wentao, Liang, Zhixi, Zheng, Shaoyong, Liu, Juhua, Long, Yunliang
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Sprache:eng
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Zusammenfassung:A nonbalancing microstrip dipole with end-fire capability is presented. The proposed antenna consists of a simple microstrip-fed dipole with a periodic-offset double-sided parallel-strip line (DSPSL) substrate, which is used to replace the balun of a conventional end-fire antenna. The periodic-offset DSPSL substrate exhibits phase shift characteristics and excites the odd mode of the microstrip dipole. A director and a truncated ground are used to increase the directivity of the antenna. After placing the DSPSL, the bidirectional radiation pattern is converted to a unidirectional one. The measured and simulated results indicate that the antenna operates at 2.4 GHz. End-fire directional radiation patterns are obtained with this novel periodic substrate. When compared with the original design of the microstrip dipoles, the proposed microstrip dipole uses the periodic-offset DSPSL substrate to replace the balun. The front-to-back ratio is about 10 dB. The design method of the end-fire antenna is a new technique and can be easily applied in other antennas.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2017.2682227