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A Huygens' Principle Based Ray Tracing Method for Diffraction Calculation 基于惠更斯原理的射线追踪衍射计算方法
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769357
Han Na, T. Eibert
{"title":"A Huygens' Principle Based Ray Tracing Method for Diffraction Calculation","authors":"Han Na, T. Eibert","doi":"10.23919/eucap53622.2022.9769357","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769357","url":null,"abstract":"In conventional ray tracing methods, diffraction calculations for wedges are typically based on the uniform theory of diffraction (UTD). However, UTD is both inaccurate and computationally expensive in the calculation of multiple diffractions. In order to mitigate these shortcomings, a Huygens' principle based method is proposed as an alternative or extension to the conventional UTD. This method captures rays on properly chosen Huygens' surfaces and creates equivalent emitters for subsequent secondary ray launches based on the captured rays. Despite the extra effort of creating a Huygens' surface, compared with UTD, this method has considerably improved flexibility in handling complex geometrical shapes and it preserves the accuracy over multiple diffractions. Furthermore, by properly choosing the Huygens' surface and equivalent emitters, both computational complexity and accuracy can be controlled.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124222762","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
Analysis of Residential Sub-THz Deployments from Accurate Radio Simulations and Planning Techniques 从精确无线电模拟和规划技术分析住宅次太赫兹部署
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769296
L. Maviel, Y. Corre, G. Gougeon, Djamel Amar
{"title":"Analysis of Residential Sub-THz Deployments from Accurate Radio Simulations and Planning Techniques","authors":"L. Maviel, Y. Corre, G. Gougeon, Djamel Amar","doi":"10.23919/eucap53622.2022.9769296","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769296","url":null,"abstract":"High-capacity bandwidth makes sub-THz spectrum a key element of beyond-5G or 6G networks. However wireless communications at frequencies such as in W-band, D-band or above do suffer from strong constraints at the physical layer, they may be greatly beneficial for adequately chosen ultra-broadband applications and network topologies. Multi-hop backhauling and Fixed Wireless Access (FWA) networks are both candidates that we decided to assess as a combination. The physical-layer performance is estimated from LiDAR-based ray-tracing predictions and by considering a sub-THz polar-QAM modulation. The site placement is optimized by an automated heuristic method. Finally, analysis of a case study in a North American residential area demonstrates that a FWA design at 150 GHz is challenging due to propagation, but feasible. The comparison between a coverage-constrained sub-THz design and a capacity-constrained 5G design shows interesting complementarity.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124302432","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
Thermally Actuated Vanadium Dioxide Millimeter Wave Reflectarray 热驱动二氧化钒毫米波反射器
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9768925
Jordan A. Ramsey, Kendrick Q. Henderson, N. Ghalichechian
{"title":"Thermally Actuated Vanadium Dioxide Millimeter Wave Reflectarray","authors":"Jordan A. Ramsey, Kendrick Q. Henderson, N. Ghalichechian","doi":"10.23919/eucap53622.2022.9768925","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9768925","url":null,"abstract":"This paper presents the development of a reconfigurable vanadium dioxide <tex>$(mathbf{VO}_2)$</tex> based reflectarray antenna using a novel 1-bit split patch element. The thermally actuated unit cell, composed of a quarter wavelength <tex>$(0.25lambda_0)$</tex> copper patch and a VO<inf>2</inf> thin film switch is able to achieve <tex>$boldsymbol{180}^{mathrm{o}}$</tex> of phase at 35 GHz with a maximum loss of 0.35 dB. Such a design exploits the reversible metal to insulator transition properties of <tex>$mathbf{VO}_{2}$</tex> at <tex>$68^{circ}mathrm{C}$</tex>. The simplicity of such an element provides a low cost practical reconfiguration strategy that can be extended to large apertures. A full-wave <tex>$boldsymbol{40times 40}(10lambda_{0}times 10lambda_{0})$</tex> simulation of the switchable device demonstrated a maximum gain of 21.1 dB at <tex>$mathrm{0}^{circ}$</tex> and 1D beam scanning performance covering <tex>$-60^{mathbf{o}}$</tex> to <tex>$+60^{mathbf{o}}$</tex> with a 4.5 dB reduction in peak gain over the full scanning range.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124317577","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: 4
Co-Design of Dual-Purpose Heatsink Antenna for Multi-Source Ambient Energy Harvesting 多源环境能量采集双用途散热器天线协同设计
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769278
Azamat Bakytbekov, A. Shamim
{"title":"Co-Design of Dual-Purpose Heatsink Antenna for Multi-Source Ambient Energy Harvesting","authors":"Azamat Bakytbekov, A. Shamim","doi":"10.23919/eucap53622.2022.9769278","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769278","url":null,"abstract":"IoT infrastructure involves billions of devices that must be self-sustainable. Using ambient energy sources to power IoT devices is a promising solution. Ambient RF and thermal energy (diurnal temperature fluctuations) harvesters have great potential since both are available continuously. Smart integration is required for these two harvesters to create synergy and collect more energy. Here, a dual-purpose triple-band heatsink antenna for multi-source ambient energy harvesting is presented. Heatsink antenna serves as a receiving antenna for the RF energy harvester and serves as a heatsink for the thermal energy harvester (TEH). Co-optimization of the heatsink antenna is performed in Ansys HFSS and Ansys Fluent simultaneously. Heatsink antenna operates at GSM900, GSM1800, 3G bands with measured gains of 3.8dB, 4dB, 5.3dB respectively. Antenna gain is doubled (~3dB) and the TEH performance is tripled (200%) when the heatsink fins are integrated, emphasizing the benefit of the co-design and smart integration via heatsink antenna.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124576470","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
A Practical Solution to Enhance Electromagnetic Transmission to an Implantable/Wearable Antenna 增强电磁传输到可植入/可穿戴天线的实用解决方案
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769546
L. Tognolatti, C. Ponti, G. Schettini
{"title":"A Practical Solution to Enhance Electromagnetic Transmission to an Implantable/Wearable Antenna","authors":"L. Tognolatti, C. Ponti, G. Schettini","doi":"10.23919/eucap53622.2022.9769546","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769546","url":null,"abstract":"This paper presents a possible solution to enhance electromagnetic transmission to an implantable/wearable device in wireless power transfer systems. Based on an analytical approach we have developed, we show how it is possible, using wearable dielectric cylindrical scatterers, to increase the intensity of the transmitted field to a possible receiver, which may be arranged in the textile fabric of a garment or implanted in the underlying biological tissue. In particular, we show some parametric studies on the dielectric constant of scatterers, which can be easily integrated into a fabric, showing which configuration achieves the greatest increase in electromagnetic transmission. The electrical parameters of the biological and textile tissues are considered in the millimeter frequency range ($f=24 text{GHz}$).","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114339789","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
A Novel Millimeter-Wave Series-Fed Microstrip Line Antenna Array 一种新型毫米波串联馈电微带线天线阵列
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769079
S. Joseph, E. Ball
{"title":"A Novel Millimeter-Wave Series-Fed Microstrip Line Antenna Array","authors":"S. Joseph, E. Ball","doi":"10.23919/eucap53622.2022.9769079","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769079","url":null,"abstract":"A novel millimeter wave series-fed microstrip line antenna array is designed. The antenna array consists of stepped inverted-cone stub sections placed on both edges of the microstrip line at a guided wavelength spacing. The 5 strip stub sections can alter the surface current cancellation at each guided wavelength in an ideal microstrip line. By properly tuning the length and height difference of the strip stubs, the equivalent surface currents can be focused to the stubbed inverted-cone sections present on the microstrip line edges and results in an effective radiation. The fabricated antenna array has return loss better than 10 dB around 27.3 GHz. Peak realized gain of 10.1 dBi is achieved and measured side lobe levels are better than -15 dB. The proposed antenna array has a very good radiation pattern and low side lobe levels which makes it a suitable direction for future integrated millimeter wave antenna arrays.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114391378","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
Preliminary Study of Bone Tumors Hyperthermia at Microwaves Using Magnetic Implants 磁性植入体微波骨肿瘤热疗的初步研究
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769301
M. B. Lodi, N. Curreli, C. Macciò, E. Marongiu, L. Mariani, A. Fanti, M. Bozzi, G. Mazzarella
{"title":"Preliminary Study of Bone Tumors Hyperthermia at Microwaves Using Magnetic Implants","authors":"M. B. Lodi, N. Curreli, C. Macciò, E. Marongiu, L. Mariani, A. Fanti, M. Bozzi, G. Mazzarella","doi":"10.23919/eucap53622.2022.9769301","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769301","url":null,"abstract":"Microwave hyperthermia as therapeutic modality in oncology can be the next breakthrough technology if translated properly to the clinical practice. For deep-seated tumors such as bone cancers, antennas and radiating sources fails in achieving therapeutic temperatures without overheating healthy tissues. In this framework, magnetic implant to be used as thermo-seeds exposed to a several kHz magnetic field were studied. So far, the possibility of using magneto-dielectric biocompatible implant for performing microwave hyperthermia was not studied. In this work, we propose a simplified mono-dimensional electromagnetic model to study the propagation in a multilayer structure by means of the wave-amplitude transmission method. The model is aimed at finding suitable properties of the bolus, to be used as matching medium, while determining a set of working frequency for performing an effective treatment using magnetic implants. Then, we investigate the temperature evolution to determine, preliminarily, the feasibility of this innovative treatment modality.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114833746","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
Channel Characterization for 5G-R Indoor Communication at 2.1 GHz 2.1 GHz 5G-R室内通信信道特性研究
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769300
Ting Liu, Danping He, K. Guan, Dongliang Liu, Fusheng Zhu
{"title":"Channel Characterization for 5G-R Indoor Communication at 2.1 GHz","authors":"Ting Liu, Danping He, K. Guan, Dongliang Liu, Fusheng Zhu","doi":"10.23919/eucap53622.2022.9769300","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769300","url":null,"abstract":"With the development of the smart railway, new services need to be supported by fifth-generation (5G) technology. Comparing to 5G technology, 5G-railway (5G-R) is more suitable for complex scenarios and strict requirements of rail transit, with the potential frequency band of 2.1 GHz. An indoor server room containing servers and train control systems is a common scenario in the railway system, and its channel characteristics are still to be studied. In this paper, radio wave propagation in a server room at 2.1 GHz is predicted using the ray-tracing method, and channel characteristics analysis is conducted through the information acquired from the channel model and rays. Electromagnetic parameters of material are calibrated based on the limited measurement to ensure the validity of the model. Different configurations of the 5G-R indoor scenario simulation can refer to this method, which greatly reduces the equipment, time, and human effort required for measurement.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115130918","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
Thermographic Investigation of Frequency-Reconfigurable Wearable Antennas 频率可重构可穿戴天线的热成像研究
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769324
Quoc Hung Dang, S. J. Chen, C. Fumeaux
{"title":"Thermographic Investigation of Frequency-Reconfigurable Wearable Antennas","authors":"Quoc Hung Dang, S. J. Chen, C. Fumeaux","doi":"10.23919/eucap53622.2022.9769324","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769324","url":null,"abstract":"The thermal behavior of a frequency-reconfigurable wearable textile antenna is investigated in this paper through in-frared thermography. The relationship between the temperature of the textile antenna and the input power is experimentally considered to identify the antenna hot spots. It is found that, the highest temperature point is mainly at the tuning component location, which is consistent with the loss predictions from electromagnetic simulation tools. A clear correlation is confirmed between the radiation efficiency and temperature of the varactors used as tuning elements. It is also observed that tuning frequency remains stable despite the antenna input power variations within the range from 21 to 521 mW. The presented preliminary results demonstrate the use of infrared thermography as a valuable tool for characterization of thermal safety margins of wearable devices and for imaging of losses in reconfigurable antenna technology.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115072848","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
Spatial Domain Indirect Holography for Phaseless Microwave Imaging 无相微波成像的空间域间接全息
2022 16th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2022-03-27 DOI: 10.23919/eucap53622.2022.9769302
S. Costanzo, G. Lopez, G. Di Massa
{"title":"Spatial Domain Indirect Holography for Phaseless Microwave Imaging","authors":"S. Costanzo, G. Lopez, G. Di Massa","doi":"10.23919/eucap53622.2022.9769302","DOIUrl":"https://doi.org/10.23919/eucap53622.2022.9769302","url":null,"abstract":"The solution of inverse scattering problem arising in microwave imaging generally requires the knowledge of the incident field distribution inside the imaging domain. This task can be accomplished by sampling the whole imaging domain, but resulting into an inconvenient strategy. Alternatively, the incident field can be collected on the measurement domain only, by subsequently retrieving the required field distribution. In this contribution, a two-step phaseless strategy for the prediction of the incident field distribution is presented. Starting from the intensity knowledge of the incident field on the measurement domain, the corresponding phase is retrieved by applying a Spatial Domain Indirect Holography Technique. The retrieved complex incident field is then exploited within a Modal Expansion formulation for the incident field reconstruction inside the imaging domain. The validity of this combined approach is tested within a phaseless inverse scattering strategy, where intensity-only data relative to the total field are assumed to be sampled. The effectiveness of the proposed solution is demonstrated through validation on a breast imaging scenario.","PeriodicalId":228461,"journal":{"name":"2022 16th European Conference on Antennas and Propagation (EuCAP)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117167321","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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