High-gain printed monopole antenna with dual-band characteristics using FSS-loading and top-hat structure.

Autor: Danuor P; Department of Electronic Engineering, Hanbat National University, Daejeon, 34158, South Korea., Moon JI; Radio and Satellite Research Division, Electronics and Telecommunications Research Institute (ETRI), Daejeon, South Korea., Jung YB; Department of Electronic Engineering, Hanbat National University, Daejeon, 34158, South Korea. ybjung@hanbat.ac.kr.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Jun 20; Vol. 13 (1), pp. 9982. Date of Electronic Publication: 2023 Jun 20.
DOI: 10.1038/s41598-023-37186-x
Abstrakt: In this paper, a printed monopole antenna with high-gain and dual-band characteristics for applications in wireless local area networks and the internet of things sensor networks is presented. The proposed antenna consists of a rectangular patch with multiple matching stubs surrounded to improve the impedance bandwidth of the antenna. The antenna incorporates a cross-plate structure which is seated at the base of the monopole antenna. The cross-plate consist of metallic plates aligned perpendicularly which enhances the radiations from the edges of the planar monopole to maintain uniform omnidirectional radiation patterns within the antenna's operating band. Furthermore, a layer of frequency selective surface (FSS) unit cells and a top-hat structure is added to the antenna design. The FSS layer consist of three unit cells printed at the back side of the antenna. The top-hat structure is placed on top of the monopole antenna and comprises of three planar metallic structures arranged in a hat-like configuration. The coupling of both the FSS layer and the top-hat structure presents a large aperture to increase the directivity of the monopole antenna. Thus, the proposed antenna structure realizes a high gain without compromising the omnidirectional radiation patterns within the antenna's operating band. A prototype of the proposed antenna is fabricated where good agreement is achieved between the measured and full-wave simulation results. The antenna achieves an impedance bandwidth |S 11 | < - 10 dB and VSWR ≤ 2 for the L and S band at 1.6-2.1 GHz and 2.4-2.85 GHz, respectively. Furthermore, a radiation efficiency of 94.2% and 89.7% is realized at 1.7 and 2.5 GHz, respectively. The proposed antenna attains a measured average gain of 5.2 dBi and 6.1 dBi at the L and S band, respectively.
(© 2023. The Author(s).)
Databáze: MEDLINE
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