A compact, high gain, spoof surface plasmon polariton sawtooth end-fire antenna

ABSTRACT

In this paper we propose an end-fire antenna fed by a spoof surface plasmon transmission line that can exhibit a conical directional response. The plasmonic transmission line is composed of metallic strips of periodic sawtooth grooves that taper towards the firing end of the strip. By tapering the sawtooth grooves, reflection is suppressed, and a high gain is achieved when the spoof surface plasmons radiate into free space. Simulated results indicate that our antenna can achieve high efficiency and a maximum gain of 12.4 dBi within a wide operating band from 6 to 13 GHz. The antenna proposed in this paper has a simple and compact structure with a lateral dimension of approximately 0.19${\lambda }_0$* 0.32${\lambda }_0$ and shows great potential for use in spoof surface plasmon polariton communication systems along with integrated circuits.

KEYWORDS:

• Spoof surface plasmon polaritons
• End-fire antenna
• High gain
• GHz band

Disclosure statement

No potential conflict of interest was reported by the author(s).

ORCID

Binggang Xiao http://orcid.org/0000-0001-6920-101X

Additional information

Funding

This work was supported by the 2016 Zhejiang Provincial Natural Science Foundation of China [grant numbers LY16F010010, Y20F010069] and in part by the 2015 Zhejiang Province Public Welfare Technology Application Research Project of International Cooperation Project [grant number 2015C34006].