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2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)最新文献

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A Closed-form Design Method for GRIN Lens Design 一种用于GRIN透镜设计的封闭式设计方法
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172128
Hossein Eskandari, M. Shokooh-Saremi, T. Tyc
{"title":"A Closed-form Design Method for GRIN Lens Design","authors":"Hossein Eskandari, M. Shokooh-Saremi, T. Tyc","doi":"10.1109/MMWaTT58022.2022.10172128","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172128","url":null,"abstract":"A design method for graded-index lens antennas is proposed. The method consists of proposing a phase function in a region of space that meets the boundary conditions of the design and rescaling the optical path. The latter allows us to adjust the lens’s refractive index. The designed lens has a length of 6λ, an aperture width of 8.7λ. The highest required refractive index is 1.6. A directivity value of 25.4 dB, and a -24 dB side-lobe level are attained. The design functionality is verified using COMSOL.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115009280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimized Isolation and Cloaking of Two Closely Spaced and Interleaved Patch Array Antennas via Elliptical Metasurfaces for 5G Applications 5G应用中两个紧密间隔交错贴片阵列天线的椭圆超表面优化隔离和隐身
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172129
R. Masoumi, R. Kazemi
{"title":"Optimized Isolation and Cloaking of Two Closely Spaced and Interleaved Patch Array Antennas via Elliptical Metasurfaces for 5G Applications","authors":"R. Masoumi, R. Kazemi","doi":"10.1109/MMWaTT58022.2022.10172129","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172129","url":null,"abstract":"The objective of the present research is to assess the efficacy of mantle cloaking in favor of achieving isolation between two densely packed patch antenna arrays. with close operating frequencies. The implementation involves elliptical mantle cloaks in the form of vertical strips to reduce mutual coupling between neighboring elements. The edge-to-edge interval of the two arrays’ elements is less than λ/100 , while the center-to-center distance of respective array element is λ/2. The functionality of this design is investigated with regard to impedance matching, antenna gain, decoupling level, radiation patterns, and efficiency. In an isolated scenario, Array I achieves 11.7 dB gain, 13.8 dB sidelobe level (SLL), and 99.6% total efficiency at its operating frequency; whereas Array II achieves 11.6 dB gain, 13.6 dB SLL, and 98.9% efficiency. The radiation properties of the arrays are accurately restored following the implementation of cloaking. The successful isolation of closely spaced array antennas on a single substrate presents opportunities for compact communication systems.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126117243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of mmW Leaky-Wave Radiation from a Cylindrically Modulated Surface Impedance 圆柱调制表面阻抗毫米波漏波辐射的研究
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172125
E. Sadeghi, M. Neshat
{"title":"Study of mmW Leaky-Wave Radiation from a Cylindrically Modulated Surface Impedance","authors":"E. Sadeghi, M. Neshat","doi":"10.1109/MMWaTT58022.2022.10172125","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172125","url":null,"abstract":"We presents a study on the millimeter-wave leaky-wave radiation from a cylindrically modulated surface impedance. A fast analytical algorithm is used in our study to show the effect of various parameters including the average surface reactance, substrate height and permittivity on the radiation performance. Simple formulas are derived to estimate the angle of the maximum radiation and the beamwidth. Such cylindrical leaky-wave antennas are perfect candidates for high-gain low-profile antennas in millimeter-wave range.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115279205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Performance analysis of OFDM and GFDM techniques over additive white impulsive noise channels OFDM和GFDM技术在加性白脉冲噪声信道上的性能分析
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172127
M. Sheikh-Hosseini, Somayeh Ahmadi
{"title":"Performance analysis of OFDM and GFDM techniques over additive white impulsive noise channels","authors":"M. Sheikh-Hosseini, Somayeh Ahmadi","doi":"10.1109/MMWaTT58022.2022.10172127","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172127","url":null,"abstract":"Generalized Frequency Dividing multiplexing (GFDM) technique due to overcoming orthogonal frequency division multiplexing (OFDM) drawbacks such as high out-of-band emissions and high sensitivity to time and frequency offsets, has received increasing interest as a waveform solution for the 5G networks and beyond. However, these two multi-carrier techniques suffer from high peak power to average power ratio (PAPR) and loss in bit error rate (BER) performance over challenging scenarios of impulsive noise channels. This paper investigates the performance of these two techniques from BER and PAPR viewpoints in the presence of two well-known impulsive noise models of Middleton Class A and Bernoulli-normal. In the case of BER, the results confirm that the more impulsive noise intensity is increased, the more loss in the BER of both techniques is caused. However, the GFDM technique is more robust against the adverse effects of such noises. In the case of PAPR, although the GFDM performance is worse than OFDM, we remarkably moderate this challenge by employing a precoder at the GFDM transmitter side and a noise mitigation method for its receiver.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114755165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-Gain Fan-Beam Leaky-Wave Antenna Using Symmetrical Long-slots for 5G Millimeter-Wave Base Station Applications 5G毫米波基站应用的对称长槽高增益扇波束漏波天线
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172123
Mohaddeseh Shahrbandian, H. Aliakbarian, Reza Yazdani, Donghyun Kim
{"title":"High-Gain Fan-Beam Leaky-Wave Antenna Using Symmetrical Long-slots for 5G Millimeter-Wave Base Station Applications","authors":"Mohaddeseh Shahrbandian, H. Aliakbarian, Reza Yazdani, Donghyun Kim","doi":"10.1109/MMWaTT58022.2022.10172123","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172123","url":null,"abstract":"One of the most popular leaky-wave antennas is long-slot antennas in a rectangular waveguide which has a simple design and easy fabrication. The main disadvantage of a long-slot leaky-wave antenna is a radiation null at the broadside direction. In this paper, coating a dielectric layer on top of the long-slot antenna is proposed, and the radiation null is changed to a radiation peak with 27 dB improvement, which can be useful as an antenna for the fifth-generation (5G) communications in millimeter-wave. The proposed design is also applicable to base stations located in urban and suburban areas. The idea is also successfully implemented on a substrate integrated waveguide at 28 GHz. The designs are optimized to have a wide symmetrical radiation pattern, high gain, wide band-width, and wide beam-width in the horizontal plane. The realized gain of the coated long-slot waveguide antenna and the coated long-slot substrate integrated waveguide antenna are 20.2 dBi and 11.2 dBi, respectively.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129236247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adjustable beam antenna using high impedance surface with graphene parts and photonic bandgap for THz applications 可调波束天线采用高阻抗表面与石墨烯部件和光子带隙太赫兹应用
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172107
Hossein Omidi, S. Jarchi
{"title":"Adjustable beam antenna using high impedance surface with graphene parts and photonic bandgap for THz applications","authors":"Hossein Omidi, S. Jarchi","doi":"10.1109/MMWaTT58022.2022.10172107","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172107","url":null,"abstract":"A reconfigurable beam terahertz antenna, applying graphene, is designed and investigated. The presented design consists of a circular loop antenna mounted on a multilayer structure composed of a high impedance surface, with circular configuration and composed of metal and graphene parts, and a photonic bandgap layer. A reconfigurable main beam is achieved as the chemical potential of the designed HIS sections are varied between 0 and 1eV and, the photonic bandgap provides return loss improvement and gain enhancement due to reduction of surface waves loss. The performance of the designed antenna is investigated through the gain, radiation pattern and reflection coefficient parameters. The results show that main beam of the loop antenna is adjusted in 25 directions of different elevation and azimuth angles and, the maximum gain of 6.57 dBi at 1 THz with 22-degrees tilt on ϕ = 0 plane is achieved.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132222227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resonant field enhancement in all-dielectric metastructures supporting THz bound states in the continuum 支持连续体中太赫兹束缚态的全介电元结构的共振场增强
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172121
Seyedeh Bita Saadatmand, V. Ahmadi, S. Hamidi
{"title":"Resonant field enhancement in all-dielectric metastructures supporting THz bound states in the continuum","authors":"Seyedeh Bita Saadatmand, V. Ahmadi, S. Hamidi","doi":"10.1109/MMWaTT58022.2022.10172121","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172121","url":null,"abstract":"Owing to their flexible and adaptable control in optics, active optical metastructures have attracted growing attention in nanophotonics. In this study, we investigate the manipulation of a resonant all-dielectric metastructure using the thermal-sensitive material SrTiO3, at different temperatures. A double-disk array has been designed to support responses that exhibit a strong toroidal dipole and a quasi-bound state in the continuum, which is magnetic dipole. The ultrahigh sensitivity level of 501 GHz/RIU is obtained by low-loss magnetic dipole resonances with extremely narrow linewidth that is very sensitive to alters in the dielectric constant of the sensing medium. These results are promising for the development of THz-range ultrasensitive optical sensors.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125188022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Thermally tunable wideband and bifunctional plasmonic-VO2 metasurface in THz region 太赫兹区热可调谐宽带双功能等离子体- vo2超表面
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172118
Navid Naghshpour, T. Pakizeh
{"title":"Thermally tunable wideband and bifunctional plasmonic-VO2 metasurface in THz region","authors":"Navid Naghshpour, T. Pakizeh","doi":"10.1109/MMWaTT58022.2022.10172118","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172118","url":null,"abstract":"In this paper, a thermally tunable plasmonic-VO2 metasurface with wideband bifunctionality is introduced and studied. This planar structure can be a wideband polarization converter and absorber based on insulator to metal phase change of VO2. In room temperature, the introduced metasurface is a linear (LP) to circular (CP) polarization converter for which the ellipticity is more than 95% and its operating bandwidth is 36.55 % in the wavelength range of 1.91 to 2.77 (μm). By increasing temperature up to 358 (K), VO2 faces phase change to metallic state and then the proposed metasurface acts as an absorber of electromagnetic waves for which the absorbance is more than 80% and its operating bandwidth is ~ 71%, in the wavelength range of 1.68 to 3.5 (μm). For this bifunctional metasurface, its ellipticity for the converter and absorbance for the absorber is almost insensitive to incident angle (θ°) up to 25° and 30° respectively for the both TE and TM modes. The effects of the polarization angle (φ°) is also studied and shown that by increasing polarization angle up to 90° in the absorber case, the working bandwidth of absorber is unaltered.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123591640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multibeam 5G Conical Leaky-Wave Antenna Based on Holographic Technique 基于全息技术的5G多波束锥形漏波天线
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172124
Mohammad Amin Chaychi Zadeh, N. Komjani, Sajjad Zohrevand
{"title":"Multibeam 5G Conical Leaky-Wave Antenna Based on Holographic Technique","authors":"Mohammad Amin Chaychi Zadeh, N. Komjani, Sajjad Zohrevand","doi":"10.1109/MMWaTT58022.2022.10172124","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172124","url":null,"abstract":"This article presents the synthesize process for a holographically inspired multi-beam conical antenna. The proposed antenna comprises of grounded conformal hexagonal unit cells printed on a Rogers RT6002 substrate with a thickness of 60 mils. The Eigen mode solver of CST software with planar approximation is used to calculate the surface impedance of the unit cells. Each unit cell's periodicity and dimension increment ratio along the cone's edge is 1.005. Moreover, for 5G telecommunication applications, the operation frequency of the antenna is assumed 26 GHz. The surface reference wave is generated by feeding from the edge of the antenna structure with a conical wave front. The direction of the triple object beams can be chosen arbitrarily, which are assumed φi= (2i-1)π/3 and θi=π/2 (i=1,2,3) in the design process, respectively. The overall electrical area of the hologram plane is about 9.5 λ02. The gain of each beam and the antenna's efficiency are 14.5 dBi and 0.83, respectively.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114883503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pattern Scanning of THz Elliptical Apertures Antenna Array Design for Intensity Enhancement in Spectroscopy 太赫兹椭圆孔径天线阵列的谱图扫描在光谱学中的应用
2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172108
Amir Saman Zare Andalani, N. Granpayeh
{"title":"Pattern Scanning of THz Elliptical Apertures Antenna Array Design for Intensity Enhancement in Spectroscopy","authors":"Amir Saman Zare Andalani, N. Granpayeh","doi":"10.1109/MMWaTT58022.2022.10172108","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172108","url":null,"abstract":"The advantage of resonantly THz antennas is the enhancement of electromagnetic fields in the spectroscopy. Our proposed design includes a spectroscopy setup, which contains THz elliptical aperture antenna array. The designed antenna improves radiation characteristics to obtain the maximum intensity value of the spectroscopy beam at the far-field zone. The THz antenna radiation is scanned at the various elevation angles and radiates into the assigned biomaterial. The scanning of radiation and the placement of a conductor as the biomaterial substrate help to determine the highest intensity. Hence, the utilized THz elliptical aperture antenna array and the conductor, have the role of an emitter and reflector in our spectroscopy setup, respectively. Different types of urea biomaterial with the different permittivities are chosen as a sample to calculate the intensity of spectroscopy beam.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127466976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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