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

Design and Analysis of Wideband THz Micro Size Patch Antenna for 6G application 6G宽带太赫兹微尺寸贴片天线的设计与分析

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172086

Waleed A. Khan, Affan Bin Muhammad

引用次数: 0

Electrical control of a THz beam generated through nonlinear metasurfaces based on multiple quantum wells 基于多量子阱的非线性超表面产生的太赫兹光束的电气控制

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172119

Amin Ghahremani, M. Neshat, Zahra Shaterzadeh Yazdi, Taher Zahedi

引用次数: 0

High Performance Low cost Transition Connectors for 5G mmWave Applications 用于5G毫米波应用的高性能低成本过渡连接器

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172110

A. Azari, A. Skrivervik, H. Aliakbarian, R. Sadeghzadeh

引用次数: 0

A High Gain, Wide-band, and Wide-Angle mmWave Power Harvester Using Luneburg Lens 使用Luneburg透镜的高增益、宽带、广角毫米波能量采集器

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172112

Masoud Alipour Shirazi, Mohammad Khalaj-Amirhosseni, Amir saman Nooramin

引用次数: 0

A Confocal Ellipsoidal Reflector System for Millimeter-Wave Applications 应用于毫米波的共聚焦椭球反射系统

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172114

Mohammad Hossein Koohi Ghamsari, M. Ahmadi-Boroujeni, S. Babanejad

{"title":"A Confocal Ellipsoidal Reflector System for Millimeter-Wave Applications","authors":"Mohammad Hossein Koohi Ghamsari, M. Ahmadi-Boroujeni, S. Babanejad","doi":"10.1109/MMWaTT58022.2022.10172114","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172114","url":null,"abstract":"In this paper, an axisymmetric dual reflector system, called the confocal ellipsoidal structure, is proposed for millimeter-wave applications. It is shown that by using a deliberate modification of the secondary reflector (subreflector) profile in the standard axisymmetric Gregorian structure, the blockage can be reduced considerably. This modification is performed by applying simultaneous displacement and tilting techniques on the subreflector. The proposed confocal ellipsoidal structure can be applied to both communication antennas and quasi-optical imaging systems by adopting a proper main reflector profile. The performance of the proposed structure in each of the mentioned applications is investigated by numerical simulations. Specifically, the reduction of the blockage and imaging performance of the confocal ellipsoidal structure is studied in various scenarios. Based on the simulations, acceptable results are obtained in the focusing and scanning performance. Having a simple structure and a noticeable performance, the proposed structure is promising for millimeter-wave standoff imaging and communication.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"33 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":"123813601","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

A Low Profile and Low Cross-Polarization Metasurface Antenna for 5G mm-wave Applications 面向5G毫米波应用的低轮廓低交叉极化超表面天线

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172126

Hamed Hamlbar Gerami, R. Kazemi

{"title":"A Low Profile and Low Cross-Polarization Metasurface Antenna for 5G mm-wave Applications","authors":"Hamed Hamlbar Gerami, R. Kazemi","doi":"10.1109/MMWaTT58022.2022.10172126","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172126","url":null,"abstract":"In this paper, a low profile and low cross-polarization miniaturized metasurface antenna is presented for 5G mm-wave applications. The metasurface consists two different sets of patches in a 3 × 3 configuration; the patches in the middle of the structure have been intelligently loaded with slits and stubs to separate degenerate modes and suppress higher-order modes that appear in a conventional symmetric metasurface. As a result, a miniaturized metasurface antenna with low cross-polarization (XP) level and improved efficiency is achieved. The simulation results of the antenna show the proposed metasurface antenna covers a bandwidth of 19% (24.5 GHz-29.5 GHz) with better than 10 dB return loss, 9 dB peak gain and XP level < -45 dB all over the desired frequency range. The size of the proposed antenna is 0.72λ0 × 0.72λ0 × 0.07λ0 which is 62% smaller than the conventional metasurface antenna. To further investigate the performance of the proposed antenna, it is used in a 2×2 Multiple Input-Multiple Output (MIMO) configuration without any additional inter-element spacing. Since in the new antenna, the higher-order modes are moved to out-of-band frequencies, the beam split and beam squint are not observed in its radiation patterns, which are issues in conventional metasurface antennas.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"33 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":"131599375","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

A More Generalized Scattering Matrix for the Analysis of Active Modulated Metasurfaces 有源调制超表面分析的更广义散射矩阵

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172117

M. Khatami, L. Yousefi, M. Dehmollaian

引用次数: 0

Mutual Coupling Reduction in Multiple-Input Multiple-Output Antenna Based on Metamaterial at Low THz Frequency Band 基于超材料的低太赫兹频段多输入多输出天线互耦抑制

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172115

Mohammad Hossein Aghamohammadi, S. Jarchi, A. Zamani

{"title":"Mutual Coupling Reduction in Multiple-Input Multiple-Output Antenna Based on Metamaterial at Low THz Frequency Band","authors":"Mohammad Hossein Aghamohammadi, S. Jarchi, A. Zamani","doi":"10.1109/MMWaTT58022.2022.10172115","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172115","url":null,"abstract":"In this study, spiral resonator and complementary spiral resonator metamaterials have been applied to increase isolation in a dual-element MIMO antenna operated in the low terahertz frequency range 0.55 THz to 0.63 THz. Mutual coupling is reduced in the entire working bandwidth of the antenna, relatively wide bandwidth of 13.5%, and is at its maximum value, equal to 23 dB, at the antenna resonance frequency of 0.58 THz. In addition, the values of envelope correlation coefficient, diversity gain, back-lobe radiation and realized gain over frequency are enhanced with metamaterial loading. Effectiveness of the metamaterial loading on mutual coupling reduction is confirmed through investigating surface current on the antenna structure. Compared to other methods of mutual coupling reduction which mentioned in the text of this study, the proposed method has a relative advantage in terms of wide bandwidth, simplicity of design and increase high isolation in the terahertz frequency band. Applications of this structure include beyond 5G technologies, medical imaging, high-bandwidth and high capacity in short-range communications at low THz frequency band.","PeriodicalId":166329,"journal":{"name":"2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"08 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":"130548119","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: 1

Theoretical Design of a Switchable Chiral Meta-atom in The Terahertz Band Using Phase Change Material 基于相变材料的太赫兹波段可切换手性元原子理论设计

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172122

Saeed Ghayouri, T. Pakizeh

引用次数: 0

Temperature-Dependent Behavior of the Dirac like Point in the Two Dimensional Photonic Crystal-Based ZRIM in the Cryogenic Region 低温区二维光子晶体ZRIM中Dirac类点的温度依赖行为

2022 6th International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2022-12-13 DOI: 10.1109/MMWaTT58022.2022.10172120

Amirreza Ghaffari, H. Zandi

{"title":"Temperature-Dependent Behavior of the Dirac like Point in the Two Dimensional Photonic Crystal-Based ZRIM in the Cryogenic Region","authors":"Amirreza Ghaffari, H. Zandi","doi":"10.1109/MMWaTT58022.2022.10172120","DOIUrl":"https://doi.org/10.1109/MMWaTT58022.2022.10172120","url":null,"abstract":"A zero refractive index material (ZRIM) structure containing a two dimensional dielectric photonic crystal in the cryogenic temperature region has been analyzed to investigate the Dirac-like point temperature sensitive behavior. The main effect of temperature variation is deviation of the material refractive index; in this work, silicon is utilized which demonstrates appropriate behavior in THz range. Experimentally reported complex optical index of a n-type Silicon slab with moderate doping for the ZRIM unit cell are considered. Photonic band structure of a cylindrical squared lattice of silicon rods is numerically computed for multiple values of silicon refractive index in accordance with temperature variation. For such deviations, the Dirac point of the ZRIM structure undergoes a slight change in operational frequency. This change is accompanied by a slight deviation of Bloch's wave-vector from center of Brillouin zone (κ = Γ). We have calculated photonic band gap for the assumed structure sweeping the Silicon refractive index and shown that a minimum band gap exists in accordance with a certain temperature. We have also obtained and analyzed the effective refractive index of the photonic crystal unit cell as an auxiliary tool to demonstrate that these structures could satisfy the zero-refraction phenomenon. Variations in operational frequency of the Dirac-point and photonic band gap values are also verified in effective refractive index diagrams. In line with some metamaterial-based applications, the final step includes a comparison made between a single dielectric slab and a row array of the same material in a periodic structure of rods. This simulation is conducted for a more realistic situation while considering the energy transmission coefficient. Consequently, at the frequency in which the minimum band gap was achieved, the extracted transmission coefficient is studied versus the Silicon refractive index (temperature).","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":"131286000","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