{"title":"Switchable circular polarization in flower-shaped reconfigurable graphene-based THz microstrip patch antenna","authors":"Narges Kiani, Farzad Tavakkol Hamedani, Pejman Rezaei","doi":"10.1007/s10470-023-02215-2","DOIUrl":null,"url":null,"abstract":"<div><p>In the proposed article, the design of a flower-shaped reconfigurable graphene-based THz microstrip patch antenna is presented. The cross-shaped slot in the center of the antenna promises the realization of circular polarization. The configuration of the structure is considered in such a way that each component of the body has the ability to realize a different behavior for the far-field due to the changes in the chemical potential values and in fact the Fermi energy. In fact, an antenna with the ability to switch between right-handed circular polarization and left-handed circular polarization has been proposed in the THz frequency band. According to the design, the resonance frequency is located at 0.77 THz. The main purpose is polarization adjusting through chemical potential changes. At the same time, the physical structure of the antenna remains fixed and intact. Next, an antenna with a suitable matching range of 0.6 THz through 0.95 THz has been achieved. It is possible to control its polarization in two circular polarization modes, right-handed and left-handed. Suitable axial ratio is about 3 dB, which is obtained in the range of 0.62 THz through 0.64 THz. The addition of layered patches has enabled polarization switching. The output of S<sub>11</sub> is less than − 10 dB in the range of 0.6 THz through 0.95 THz. which represents the optimal matching. And, the outputs of radiation efficiency, far-field directivity radiation pattern, 2D and 3D radiation patterns, E-field distribution, surface current distribution H-field distribution, and current density distribution have been reflected.</p></div>","PeriodicalId":7827,"journal":{"name":"Analog Integrated Circuits and Signal Processing","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analog Integrated Circuits and Signal Processing","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10470-023-02215-2","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"COMPUTER SCIENCE, HARDWARE & ARCHITECTURE","Score":null,"Total":0}
引用次数: 0
Abstract
In the proposed article, the design of a flower-shaped reconfigurable graphene-based THz microstrip patch antenna is presented. The cross-shaped slot in the center of the antenna promises the realization of circular polarization. The configuration of the structure is considered in such a way that each component of the body has the ability to realize a different behavior for the far-field due to the changes in the chemical potential values and in fact the Fermi energy. In fact, an antenna with the ability to switch between right-handed circular polarization and left-handed circular polarization has been proposed in the THz frequency band. According to the design, the resonance frequency is located at 0.77 THz. The main purpose is polarization adjusting through chemical potential changes. At the same time, the physical structure of the antenna remains fixed and intact. Next, an antenna with a suitable matching range of 0.6 THz through 0.95 THz has been achieved. It is possible to control its polarization in two circular polarization modes, right-handed and left-handed. Suitable axial ratio is about 3 dB, which is obtained in the range of 0.62 THz through 0.64 THz. The addition of layered patches has enabled polarization switching. The output of S11 is less than − 10 dB in the range of 0.6 THz through 0.95 THz. which represents the optimal matching. And, the outputs of radiation efficiency, far-field directivity radiation pattern, 2D and 3D radiation patterns, E-field distribution, surface current distribution H-field distribution, and current density distribution have been reflected.
期刊介绍:
Analog Integrated Circuits and Signal Processing is an archival peer reviewed journal dedicated to the design and application of analog, radio frequency (RF), and mixed signal integrated circuits (ICs) as well as signal processing circuits and systems. It features both new research results and tutorial views and reflects the large volume of cutting-edge research activity in the worldwide field today.
A partial list of topics includes analog and mixed signal interface circuits and systems; analog and RFIC design; data converters; active-RC, switched-capacitor, and continuous-time integrated filters; mixed analog/digital VLSI systems; wireless radio transceivers; clock and data recovery circuits; and high speed optoelectronic circuits and systems.