Miniaturization of Quasi-Yagi Antenna Array with High Gain Using Split-Ring Resonators

Abstract

In order to realize the miniaturization of quasi-Yagi antenna array, an antenna array with split-ring resonators (SRRs) based on two 7 units quasi-Yagi elements is designed in this paper. The radiation performance of the quasi-Yagi antenna array degrades significantly when array element spacing is reduced. After embedding SRRs on both sides of the miniaturized dielectric substrate surface, the S parameters and gain of array are significantly better than the array without SRRs, and the adjustable wave beam energy is also enhanced effectively. It indicates that the proposed antenna array with SRRs has good directional radiation performance under the miniaturize process at the operation frequency of 2.45 GHz, which could be widely applied in the fields of smart rail transportation and wireless power transfer.

A Compact Quasi-Yagi Antenna with High Gain by Employing the Bent Arms and Split-Ring Resonators

“…To overcome this problem, metamaterials were introduced into the design of Yagi-Uda antennas [19][20][21][22]. In [23], we have used SRRs to reduce coupling between antenna elements. In this article, the SRRs array is used as additional parasitic elements, which can generate the induced currents of the proposed antenna and compensate the gain reduction in its miniaturization process.…”

Miniaturized 5G Antenna With Enhanced Gain by Using Stacked Structure of Split-Ring Resonator Array and Magneto-Dielectric Composite Material

“…The same thing happened to Zheng in [9], which can produce a Vivaldi antenna that works at the UHF frequency at 900 MHz with dimensions of 0.15λ × 0.16λ and produces a gain of about -3 dBi. Several works of literature have suggested specific ways to reduce the dimensions of the antenna while increasing the gain, such as by adding an anisotropic metasurface [10], parasitic lens superstrate [11], defected ground plane and addition of EBG structure [12], use of SRR [13], and the use of barium hexaferrite as a magneto-dielectric material [14].…”