Low-index-metamaterial for gain enhancement of planar terahertz antenna

Qing Le Zhang; Li Ming Si; Yongjun Huang; Xin Lv; Weiren Zhu

doi:10.1063/1.4868384

Low-index-metamaterial for gain enhancement of planar terahertz antenna

Qing Le Zhang, Li Ming Si, Yongjun Huang, Xin Lv, Weiren Zhu

School of Integrated Circuits and Electronics

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

We theoretically present a high gain planar antenna at terahertz (THz) frequencies by combing a conventional log-periodic antenna (LPA) with a low-index-metamaterial (LIM, |n| < 1). The LIM is realized by properly designing a fishnet metamaterial using full-wave finite-element simulation. Owing to the impedance matching, the LIM can be placed seamlessly on the substrate of the LPA without noticeable reflection. The effectiveness of using LIM for antenna gain enhancement is confirmed by comparing the antenna performance with and without LIM, where significantly improved half-power beam-width (3-dB beam-width) and more than 4 dB gain enhancement are seen within a certain frequency range. The presented LIM-enhanced planar THz antenna is compact, flat, low profile, and high gain, which has extensive applications in THz systems, including communications, radar, and spectroscopy.

Original language	English
Article number	037103
Journal	AIP Advances
Volume	4
Issue number	3
DOIs	https://doi.org/10.1063/1.4868384
Publication status	Published - Mar 2014

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abstract = "We theoretically present a high gain planar antenna at terahertz (THz) frequencies by combing a conventional log-periodic antenna (LPA) with a low-index-metamaterial (LIM, |n| < 1). The LIM is realized by properly designing a fishnet metamaterial using full-wave finite-element simulation. Owing to the impedance matching, the LIM can be placed seamlessly on the substrate of the LPA without noticeable reflection. The effectiveness of using LIM for antenna gain enhancement is confirmed by comparing the antenna performance with and without LIM, where significantly improved half-power beam-width (3-dB beam-width) and more than 4 dB gain enhancement are seen within a certain frequency range. The presented LIM-enhanced planar THz antenna is compact, flat, low profile, and high gain, which has extensive applications in THz systems, including communications, radar, and spectroscopy.",

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AU - Zhang, Qing Le

AU - Si, Li Ming

AU - Huang, Yongjun

AU - Lv, Xin

AU - Zhu, Weiren

PY - 2014/3

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AB - We theoretically present a high gain planar antenna at terahertz (THz) frequencies by combing a conventional log-periodic antenna (LPA) with a low-index-metamaterial (LIM, |n| < 1). The LIM is realized by properly designing a fishnet metamaterial using full-wave finite-element simulation. Owing to the impedance matching, the LIM can be placed seamlessly on the substrate of the LPA without noticeable reflection. The effectiveness of using LIM for antenna gain enhancement is confirmed by comparing the antenna performance with and without LIM, where significantly improved half-power beam-width (3-dB beam-width) and more than 4 dB gain enhancement are seen within a certain frequency range. The presented LIM-enhanced planar THz antenna is compact, flat, low profile, and high gain, which has extensive applications in THz systems, including communications, radar, and spectroscopy.

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Low-index-metamaterial for gain enhancement of planar terahertz antenna

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