Journal of Infrared, Millimeter, and Terahertz Waves最新文献_第4页

Design and Investigation of Compact Backed Mirror Two-Port MIMO Antenna for n257 (30 GHz) 5G Spectrum 面向 n257（30 千兆赫）5G 频谱的紧凑型背反射镜双端口多输入多输出天线的设计与研究

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-04-18 DOI: 10.1007/s10762-024-00982-1

Aditya Kumar Singh, Ajay Kumar Dwivedi, Chandan Choubey, Vivek Singh

{"title":"Design and Investigation of Compact Backed Mirror Two-Port MIMO Antenna for n257 (30 GHz) 5G Spectrum","authors":"Aditya Kumar Singh, Ajay Kumar Dwivedi, Chandan Choubey, Vivek Singh","doi":"10.1007/s10762-024-00982-1","DOIUrl":"https://doi.org/10.1007/s10762-024-00982-1","url":null,"abstract":"In this article, the designing and analysis of a compact novel dual-port multiple-input multiple-output (MIMO) printed antenna are investigated for 30 GHz mm-wave applications. The single antenna unit is having modified C-shaped radiator and an attached rectangular stub with an overall dimension of 10 × 7 × 0.8 mm3. The dual-element MIMO antenna is achieved by creating a back mirror of the single antenna element around the x-axis. This back mirror composition of the MIMO antenna elements is introducing the high level of inter-element isolation (> 20 dB). The proposed antenna prototype is built on a Roger RT/duriod substrate with a loss tangent (tanδ) of 0.0009 and a relative constant (εrsub) of 2.2. As a way to determine the capabilities of the proposed MIMO antenna, many diversity parameters are computed, including the envelope correlation coefficient (ECC < 0.05), diversity gain (DG > 9.99 dB), channel capacity loss (CCL < 0.2 bits/s/Hz), mean effective gain (MEG < − 3 dB), and total active reflection coefficient (TARC). The suggested MIMO antenna is appropriate for 5G new radio frequency bands under mm-wave communication as it has 8.36% impedance bandwidth across the frequency range of simulated (29.04–31.57 GHz)/measured (28.82–31.30 GHz). The antenna under consideration is constructed, and the simulated outcomes are verified by the measurement results.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Evaluation and Experimental Study of a 0.34-THz Folded Waveguide Sheet Beam BWO 0.34-THz 折叠波导片束 BWO 的性能评估和实验研究

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-25 DOI: 10.1007/s10762-024-00980-3

Jibran Latif, Huarong Gong, Zhanliang Wang, Atif Jameel, Shaomeng Wang, Jinjun Feng, Yubin Gong

{"title":"Performance Evaluation and Experimental Study of a 0.34-THz Folded Waveguide Sheet Beam BWO","authors":"Jibran Latif, Huarong Gong, Zhanliang Wang, Atif Jameel, Shaomeng Wang, Jinjun Feng, Yubin Gong","doi":"10.1007/s10762-024-00980-3","DOIUrl":"https://doi.org/10.1007/s10762-024-00980-3","url":null,"abstract":"Terahertz (THz) backward wave oscillators (BWOs) hold immense potential for a broad range of industrial and military applications. This study presents a comparative analysis of 0.34 THz sheet beam (SB) and circular beam (CB) folded waveguide (FWG) BWOs. We examined the design, simulation (CST MWS and PS, HFSS), and performance, revealing that sheet beam BWO outperforms circular beam BWO in terms of interaction impedance, power, efficiency, and bandwidth. Under 20 kV beam voltage and 10 mA beam current conditions, sheet beam BWO achieves 0.47 (Omega ) (0.34 THz) interaction impedance, 0.65 W output power, and a bandwidth of approximately 12 GHz, surpassing the 0.18 (Omega ), 0.23 W, and 8.5 GHz values of circular beam BWO, respectively. Furthermore, this study encompasses the fabrication and thorough characterization of the sheet beam BWO’s slow-wave structure. Experimental validation confirms its effectiveness, with measured (S_{11}) demonstrating reflection below (-)10 dB and (S_{21}) exhibiting transmission above (-)2 dB.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140300138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Q-Band MIMO Antennas with Circular Polarization for Spatial and Polarization Diversity 用于空间和极化分集的 Q 波段环形极化多输入多输出天线

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-25 DOI: 10.1007/s10762-024-00979-w

{"title":"Q-Band MIMO Antennas with Circular Polarization for Spatial and Polarization Diversity","authors":"","doi":"10.1007/s10762-024-00979-w","DOIUrl":"https://doi.org/10.1007/s10762-024-00979-w","url":null,"abstract":"<h3>Abstract</h3> The present work proposes three MIMO antennas with different configurations for the future applications of wireless communications in the Q-band of the frequency to realize both spatial and polarization diversities. A circularly polarized (CP) printed antenna operating over two frequency bands at 37.8 and 50 GHz is utilized as a single element to construct the proposed MIMO antennas. Two-element MIMO antenna systems arranged in two configurations, side-by-side and face-to-face, are proposed to achieve spatial diversity. Also, a four-element MIMO antenna system is designed to achieve polarization diversity in addition to spatial diversity. The proposed MIMO antenna systems are designed with the aid of the CST simulator. The three MIMO antennas are fabricated and their performance is experimentally evaluated regarding the circular polarization, impedance matching, antenna gain, envelope correlation coefficient (ECC), and diversity gain (DG). The experimental results for the single-element as well as the MIMO antennas come in good agreement with simulation results showing high performance. Both the numerical and experimental investigations reveal that the mutual coupling between any two ports of the proposed MIMO antennas is below (-25 {text{dB}}) . Also, for any two ports it is shown that the ECC is below (1times {10}^{-7}) and the diversity gain is higher than (9.99) . The impedance matching bandwidths (for (left|{S}_{11}right|<-10 {text{dB}}) ) are shown to be (1.53) and (1.88) GHz at (37.8) and (50mathrm{ GHz}) , respectively, and the corresponding 3-dB axial ratio bandwidths are (700) and (130mathrm{ MHz}) , respectively.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140300446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

$$bar{varvec{S}}$$ Matrix from a Two-Dimensional Slab Covered by Water Drops in W and J Bands: Comparison of a Full-Wave Method with Measurements 水滴覆盖的二维板在 W 波段和 J 波段的 $$bar{varvec{S}}$ 矩阵：全波方法与测量结果的比较

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-12 DOI: 10.1007/s10762-024-00977-y

Christophe Bourlier, Paul Bouquin, Alain Peden, Daniel Bourreau, Nicolas Pinel

引用次数: 0

A Highly Frequency-Selective 3D-Printed Dielectric Structure for the Terahertz Range 用于太赫兹范围的高频选择性三维打印介质结构

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-08 DOI: 10.1007/s10762-024-00973-2

Tobias Kubiczek, Kevin Kolpatzeck, Thorsten Schultze, Jan C. Balzer

引用次数: 0

Photonic THz Beam Steering Using Fiber Chromatic Dispersion 利用光纤色度色散进行光子太赫兹光束转向

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-02-29 DOI: 10.1007/s10762-024-00975-0

Ming Che, Hanwei Chen, Bo Li, Haruichi Kanaya, Kazutoshi Kato

{"title":"Photonic THz Beam Steering Using Fiber Chromatic Dispersion","authors":"Ming Che, Hanwei Chen, Bo Li, Haruichi Kanaya, Kazutoshi Kato","doi":"10.1007/s10762-024-00975-0","DOIUrl":"https://doi.org/10.1007/s10762-024-00975-0","url":null,"abstract":"THz technology has the potential to revolutionize various fields, including high-speed wireless communication, medical imaging, and spectroscopy. One challenge facing THz technology, however, is the limited output power (on the order of microwatts) of photonic THz sources (e.g., uni-traveling-carrier photodiode). Researchers are therefore exploring THz beam steering techniques to maximize their power effectiveness. To this end, we propose a photonic THz beam steering method that utilizes fiber chromatic dispersion, eliminating the need for energy-consuming active electronics. This paper explains its basic operating principle, fabrication and performance analysis of the associated THz array antenna, and demonstrates the feasibility of achieving a 300 GHz beam steering within 10(^circ ) by means of dispersion-varied polarization-maintaining fibers. In conclusion, the present scheme can greatly enhance the power efficiency of photonic THz sources, and enable the potential advantages of seamless integration with fiber-optic networks, including reduced complexity, simplified operation, low power consumption, and cost-effectiveness.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ionization of a Silicon Surface Layer Induced by a High-Intensity Subpicosecond Electric Field 高强度亚皮秒电场诱导的硅表面层电离

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-02-28 DOI: 10.1007/s10762-024-00976-z

引用次数: 0

High Gain Diagonally-Probe-Fed Multi-Layered Dielectric Resonator Antenna Array for 77 GHz Automotive Radar Applications 用于 77 GHz 汽车雷达应用的高增益对角探针馈电多层介质谐振器天线阵列

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-02-27 DOI: 10.1007/s10762-024-00978-x

Sung Yong An, Boumseock Kim

{"title":"High Gain Diagonally-Probe-Fed Multi-Layered Dielectric Resonator Antenna Array for 77 GHz Automotive Radar Applications","authors":"Sung Yong An, Boumseock Kim","doi":"10.1007/s10762-024-00978-x","DOIUrl":"https://doi.org/10.1007/s10762-024-00978-x","url":null,"abstract":"This paper presents a high gain diagonally-probe-fed multi-layered dielectric resonator antenna (DPF-ML-DRA) designed for 77 GHz automotive radar applications. A comparison with the conventional probe-fed ML-DRA demonstrates that the proposed DPF-ML-DRA achieves higher antenna gain by 1 dB. The sub-array utilizing the proposed DPF-ML-DRA is tailored to meet specific radar system requirements, including a broad impedance bandwidth (> 5 GHz), high antenna gain (> 12 dBi), and wide half-power beamwidth (> ± 60°). Simulated results validate that the sub-array performance meets the aforementioned antenna requirements. To attain high azimuthal and elevational angular detecting resolution, 3 sub-arrays with 12 DF-ML-DRA for the Tx channel and 4 sub-arrays with 10 DF-ML-DRA for the Rx channel were designed and simulated. The fabricated radar system underwent field testing, demonstrating a maximum range of up to 160 m and a field of view of 120° for 100 m. Remarkably, the proposed DPF-ML-DRA exhibits equivalent radar performance while featuring a smaller form-factor compared to commercially available state-of-the-art automotive radar systems. Consequently, the proposed DPF-ML-DRA proves to be well-suited for 77 GHz automotive radar applications.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140003844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study and Experimental Validation of a 0.34 THz Double Corrugated Waveguide Interaction Structure for Backward Wave Oscillator with Sheet Electron Beam 用于片状电子束后向波振荡器的 0.34 太赫兹双波纹波导相互作用结构的研究与实验验证

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-02-26 DOI: 10.1007/s10762-024-00974-1

Jibran Latif, Zhanliang Wang, Atif Jameel, Muhammad Khawar Nadeem, Bilawal Ali, Uzair Shakir, Jinjun Feng, Yubin Gong

{"title":"Study and Experimental Validation of a 0.34 THz Double Corrugated Waveguide Interaction Structure for Backward Wave Oscillator with Sheet Electron Beam","authors":"Jibran Latif, Zhanliang Wang, Atif Jameel, Muhammad Khawar Nadeem, Bilawal Ali, Uzair Shakir, Jinjun Feng, Yubin Gong","doi":"10.1007/s10762-024-00974-1","DOIUrl":"https://doi.org/10.1007/s10762-024-00974-1","url":null,"abstract":"Terahertz backward wave oscillators based on double corrugated waveguides are enabling devices for modern satellite communication systems. This research focuses on the design of a 0.34 THz double corrugated waveguide-based interaction structure using a sheet beam. This choice allows the use of shorter pillars along with a narrow gap between pillar rows. Shorter pillars are easier to manufacture and a narrow gap is required for better interaction impedance. Circular beams restrict the use of larger pillars and narrow gap between pillars. The performance of this interaction structure is compared with a folded waveguide. Under the same operating conditions involving a 20 kV beam voltage and a 30 mA beam current, the double corrugated waveguide interaction structure exhibits impressive performance in simulations, featuring an interaction impedance of 0.52 ({varOmega }) at 0.34 THz, an output power of 3.2 W, and a bandwidth extending to approximately 20 GHz. In contrast, the folded waveguide, as per simulation results, registers values of 0.43 ({varOmega }), 2.6 W, and a 12 GHz bandwidth, respectively. The proposed double corrugated waveguide-based interaction structure is fabricated using modern CNC machining. Experimental validation reinforces the effectiveness of this design, with measurements indicating reflection below −20 dB and transmission exceeding −2 dB.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139967826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harmonic Gyrotrons: Pros and Cons 谐波陀螺仪：优缺点

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-02-20 DOI: 10.1007/s10762-024-00972-3

S. P. Sabchevski, G. S. Nusinovich, M. Yu. Glyavin

引用次数: 0