Research Article

Electrically small multiband antenna based on spoof localized surface plasmons

¹ Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, PR China
² Kuang-Chi Institute of Advanced Technology, State Key Laboratory of Metamaterial Electromagnetic Modulation Technology, Shenzhen 518057, Guangdong, PR China
³ State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Shanghai 200050, PR China

^* Corresponding author: yjzhou@shu.edu.cn

Received: 15 September 2018
Accepted: 29 January 2019
Published online: 22 February 2019

Abstract

Here an electrically small multiband antenna based on spoof localized surface plasmons (LSPs) has been proposed using corrugated ring resonator printed on a thin dielectric substrate with complementary metallic spiral structure (MSS) on the ground plane. It has been found that the resonant frequencies of spoof LSPs redshift by tuning the arm length of the complementary MSS, which leads to the miniaturization of the antenna. The fabricated multiband antenna has a small size of only 0.11λ × 0.1λ, covering GSM900, GSM1800, and WiFi bands. Such electrically small multiband antenna with high gain is necessary for efficient wireless energy harvesting (WEH), which can find more applications in various areas including Internet of Things (IoT), wireless sensor network (WSN), etc.