Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221232
L. Rossi, L. Cheng, W. De Jong, R. Jansen, G. Bolognini
A ϑ-OTDR interferometric sensor employing a nonlinear preamplification approach to couneract signal fading is proposed and used to characterize the noise floor for strain values in a survey well in the Netherlands. The characterization shows the system is capable of detecting strain noise levels below 1 nε in the 0.1-100 Hz frequency range.
提出了一种ϑ-OTDR干涉传感器，采用非线性预放大方法来抵消信号衰落，并用于表征荷兰测量井应变值的本底噪声。表征表明，该系统能够在0.1-100 Hz频率范围内检测低于1 ne ε的应变噪声电平。
{"title":"Two-Stage Preamplification for ϑ-OTDR Distributed Acoustic Sensing","authors":"L. Rossi, L. Cheng, W. De Jong, R. Jansen, G. Bolognini","doi":"10.1109/PIERS59004.2023.10221232","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221232","url":null,"abstract":"A ϑ-OTDR interferometric sensor employing a nonlinear preamplification approach to couneract signal fading is proposed and used to characterize the noise floor for strain values in a survey well in the Netherlands. The characterization shows the system is capable of detecting strain noise levels below 1 nε in the 0.1-100 Hz frequency range.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117275051","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221349
Chia-Hung Chang, Wei-Wen Hu, Ching-Hsiang Yang, Chi-Sen Tai, Cheng-Yu Yu, Ji-Yuan Li, Jing Lu
A sub-1 GHz wearable radar with non-contact and real-time detection for artery detection is presented in this paper. Healthcare and wearable requirements have been a significant topic recently. The wearable radar adopts the near-field sensing technique to detect artery wall variation. A series of radio pulse is emitted to the wrist skin by the transmitting antenna. The reflected signal with artery pulse information is then back to the receiving antenna, which will be processed by the following analog/digital processing circuits. The physiological data are digitized by using the embedded system with a 10-bit analog to digital converter. The digital bandpass filter is performed to improve overall signal-to-noise ratio. Therefore, the raw data with artery information can be obtain and further transmitted to the personal computer and cellphone by a built-in Bluetooth wireless communication module. The experimental results demonstrate that the near-field sensing technique successfully detects the wrist artery based on the proposed pulse-based sensor module.
{"title":"A Sub-1GHz Wearable Radar Sensor for Artery Detection","authors":"Chia-Hung Chang, Wei-Wen Hu, Ching-Hsiang Yang, Chi-Sen Tai, Cheng-Yu Yu, Ji-Yuan Li, Jing Lu","doi":"10.1109/PIERS59004.2023.10221349","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221349","url":null,"abstract":"A sub-1 GHz wearable radar with non-contact and real-time detection for artery detection is presented in this paper. Healthcare and wearable requirements have been a significant topic recently. The wearable radar adopts the near-field sensing technique to detect artery wall variation. A series of radio pulse is emitted to the wrist skin by the transmitting antenna. The reflected signal with artery pulse information is then back to the receiving antenna, which will be processed by the following analog/digital processing circuits. The physiological data are digitized by using the embedded system with a 10-bit analog to digital converter. The digital bandpass filter is performed to improve overall signal-to-noise ratio. Therefore, the raw data with artery information can be obtain and further transmitted to the personal computer and cellphone by a built-in Bluetooth wireless communication module. The experimental results demonstrate that the near-field sensing technique successfully detects the wrist artery based on the proposed pulse-based sensor module.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115901455","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221479
Kuk-jin Yoon, Sang-Won Kim, Gwang-Zeen Ko, Seong-Min Kim
This paper presents a wireless power transfer (WPT) system for an automated guided vehicle (AGV). Our WPT system proposes an AC-AC converter located in a transmitter, which integrates AC-DC and DC-AC converters in a conventional structure. As a result, the WPT efficiency can be increased as well as the size. Additionally, the proposed structure allows for the WPT power capacity to be raised up to 3.3 kW. The proposed WPT system is theoretically analyzed using a lumped circuit model and verified with waveforms.
{"title":"A 3.3kW AC-AC Converter of Transmitter for Wireless Power Transfer Systems of Automated Guided Vehicle","authors":"Kuk-jin Yoon, Sang-Won Kim, Gwang-Zeen Ko, Seong-Min Kim","doi":"10.1109/PIERS59004.2023.10221479","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221479","url":null,"abstract":"This paper presents a wireless power transfer (WPT) system for an automated guided vehicle (AGV). Our WPT system proposes an AC-AC converter located in a transmitter, which integrates AC-DC and DC-AC converters in a conventional structure. As a result, the WPT efficiency can be increased as well as the size. Additionally, the proposed structure allows for the WPT power capacity to be raised up to 3.3 kW. The proposed WPT system is theoretically analyzed using a lumped circuit model and verified with waveforms.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115390381","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221255
Bao Qi Wang, Dun Ting Zhang, M. Tong
Highly-anisotropic objects are reconstructed by microwave imaging in the integral equation approach. The volume integral equations (VIEs) are used to describe the interaction between the microwave and objects and inverse scattering VIEs (ISVIEs) and forward scattering VIEs (FSVIEs) are alternatively and iteratively solved based on the distorted Born iterative method (DBIM) until the solution converges. The convergent solution of permittivity or permeability in the imaging domain can reveal the imaging of unknown objects. The FSVIEs are solved by a Nyström method which is more suitable for solving inverse problem than the popular method of moments (MoM) due to its unique merits. Since the objects are highly anisotropic, the Gauss-Newton minimization method (GNMM) with a multiplicative regularization scheme (MRS) is employed to solve the ISVIEs so that the numerical experiments can be minimized for determining the regularization parameter. A numerical example is provided to illustrate the proposed approach and its good performance has been proved.
{"title":"Microwave Imaging for Highly-Anisotropic Objects Based on Gauss-Newton Minimization Method","authors":"Bao Qi Wang, Dun Ting Zhang, M. Tong","doi":"10.1109/PIERS59004.2023.10221255","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221255","url":null,"abstract":"Highly-anisotropic objects are reconstructed by microwave imaging in the integral equation approach. The volume integral equations (VIEs) are used to describe the interaction between the microwave and objects and inverse scattering VIEs (ISVIEs) and forward scattering VIEs (FSVIEs) are alternatively and iteratively solved based on the distorted Born iterative method (DBIM) until the solution converges. The convergent solution of permittivity or permeability in the imaging domain can reveal the imaging of unknown objects. The FSVIEs are solved by a Nyström method which is more suitable for solving inverse problem than the popular method of moments (MoM) due to its unique merits. Since the objects are highly anisotropic, the Gauss-Newton minimization method (GNMM) with a multiplicative regularization scheme (MRS) is employed to solve the ISVIEs so that the numerical experiments can be minimized for determining the regularization parameter. A numerical example is provided to illustrate the proposed approach and its good performance has been proved.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004837","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221433
Z. Roubal, Z. Szabó, R. Kadlec, L. Zdražil
In this paper, the authors deal with the sensing and evaluation of signals obtained in the field of low-level electric charge measurements. The measurement took place in the Cisarska cave (Moravia) under specific temperature and humidity conditions for a long time. Compared to conventional techniques, the proposed method shows a lower standard deviation and analyzes the causes of spurious oscillations. The sensing method was based on measurement by a capacitive sensing sensor with controlled passage of negative ion carriers. Long-term changes in negative ion concentration are evaluated. The limestone walls, which have very beneficial material properties in terms of permittivity and electrical conductivity, are also important for the evaluation of the cave space. The maintenance of a clean limestone surface is important in terms of preserving the healing properties of the cave; the surface of the limestone has been tested in detail in terms of ions. The maintenance of a clean limestone surface is important in terms of preserving the healing properties of the cave; the surface of the limestone has been tested in detail in terms of ions. Low measurement uncertainties are necessary for the correct determination of the saturation characteristics. From this, the mobility spectrum of air ions is calculated. The obtained results of the recalculation from the saturation characteristics show the surprising origin of air ions in the cave, where the only source may not be radioactive radon, but the contribution of splintering water droplets is also significant. These results could not have been obtained without the proposed measurement methodology.
{"title":"Concentration and Mobility of Air Ions in the Environment of the Cisarska Cave (Moravia)","authors":"Z. Roubal, Z. Szabó, R. Kadlec, L. Zdražil","doi":"10.1109/PIERS59004.2023.10221433","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221433","url":null,"abstract":"In this paper, the authors deal with the sensing and evaluation of signals obtained in the field of low-level electric charge measurements. The measurement took place in the Cisarska cave (Moravia) under specific temperature and humidity conditions for a long time. Compared to conventional techniques, the proposed method shows a lower standard deviation and analyzes the causes of spurious oscillations. The sensing method was based on measurement by a capacitive sensing sensor with controlled passage of negative ion carriers. Long-term changes in negative ion concentration are evaluated. The limestone walls, which have very beneficial material properties in terms of permittivity and electrical conductivity, are also important for the evaluation of the cave space. The maintenance of a clean limestone surface is important in terms of preserving the healing properties of the cave; the surface of the limestone has been tested in detail in terms of ions. The maintenance of a clean limestone surface is important in terms of preserving the healing properties of the cave; the surface of the limestone has been tested in detail in terms of ions. Low measurement uncertainties are necessary for the correct determination of the saturation characteristics. From this, the mobility spectrum of air ions is calculated. The obtained results of the recalculation from the saturation characteristics show the surprising origin of air ions in the cave, where the only source may not be radioactive radon, but the contribution of splintering water droplets is also significant. These results could not have been obtained without the proposed measurement methodology.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123672396","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221438
Osama Aziz, Muhibur Rahman
This paper presents a miniaturized four-port MIMO antenna for URLLC and virtual MIMO applications. Virtual MIMO is a novel approach to deploying an energy-efficient sensor network. For networking purposes, this methodology necessitates the use of an omnidirectional, highly efficient, and frequency-sensitive antenna. This article discusses an omnidirectional, polarization mismatch-free, high-gain MIMO antenna. In the antenna module, defected ground structures are used to achieve decoupling of around -40dB between the orthogonal ports. The gain of almost 2.9 dB is achieved having the overall size of the antenna 55× 60 ×1.6 mm3. Because of the optimal performance of the discussed MIMO radiator, it is suitable for virtual MIMO-based wireless sensor applications.
{"title":"Miniaturized Four Port MIMO Antenna for URLLC and Virtual MIMO Applications","authors":"Osama Aziz, Muhibur Rahman","doi":"10.1109/PIERS59004.2023.10221438","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221438","url":null,"abstract":"This paper presents a miniaturized four-port MIMO antenna for URLLC and virtual MIMO applications. Virtual MIMO is a novel approach to deploying an energy-efficient sensor network. For networking purposes, this methodology necessitates the use of an omnidirectional, highly efficient, and frequency-sensitive antenna. This article discusses an omnidirectional, polarization mismatch-free, high-gain MIMO antenna. In the antenna module, defected ground structures are used to achieve decoupling of around -40dB between the orthogonal ports. The gain of almost 2.9 dB is achieved having the overall size of the antenna 55× 60 ×1.6 mm3. Because of the optimal performance of the discussed MIMO radiator, it is suitable for virtual MIMO-based wireless sensor applications.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121636831","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221566
A. Putz, M. Hussels, J. Gienger
When images are recorded using the elastically side-scattered light of spherical micro-particles (“beads”) in an imaging flow cytometer one can often see two or more bright spots rather than an image resembling the outline of the particle, like this would be seen in a bright-field or dark-field microscope. The cause of this effect is not clear - at least in the flow cytometry community. Some common explanations include them being the entry and exit points of the laser beam, possibly in connection with either fluorescence or parasitic scattering at a rough particle surface. Here we show that these bright spots are in fact so called glare points (or glare spots) that are fully explained by the elastically scattered light from a smooth, homogeneous particle and have been know in other fields of optics for many years. However, the common theoretical framework (particles with large size parameter $x > 1000$, small optical apertures) needs to be extended in order to quantitatively describe the glare points seen with high numerical aperture objectives and particle size parameters $xleq 100$ that are common in flow cytometry. The characteristics of the glare-point image (number, shape, position and brightness of points) depend on particle diameter and refractive index, as well as the optics used to form the image. Particularly for small particles $(xleq 50)$, the glare points seem to lie outside of the particle, as we discuss. We show measurements and simulations for polystyrene particles, where this effect is clearly visible and - if not properly taken into account - would significantly affect the results of glare-point based particle sizing.
{"title":"Glare Points in Laser Flow Cytometry","authors":"A. Putz, M. Hussels, J. Gienger","doi":"10.1109/PIERS59004.2023.10221566","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221566","url":null,"abstract":"When images are recorded using the elastically side-scattered light of spherical micro-particles (“beads”) in an imaging flow cytometer one can often see two or more bright spots rather than an image resembling the outline of the particle, like this would be seen in a bright-field or dark-field microscope. The cause of this effect is not clear - at least in the flow cytometry community. Some common explanations include them being the entry and exit points of the laser beam, possibly in connection with either fluorescence or parasitic scattering at a rough particle surface. Here we show that these bright spots are in fact so called glare points (or glare spots) that are fully explained by the elastically scattered light from a smooth, homogeneous particle and have been know in other fields of optics for many years. However, the common theoretical framework (particles with large size parameter $x > 1000$, small optical apertures) needs to be extended in order to quantitatively describe the glare points seen with high numerical aperture objectives and particle size parameters $xleq 100$ that are common in flow cytometry. The characteristics of the glare-point image (number, shape, position and brightness of points) depend on particle diameter and refractive index, as well as the optics used to form the image. Particularly for small particles $(xleq 50)$, the glare points seem to lie outside of the particle, as we discuss. We show measurements and simulations for polystyrene particles, where this effect is clearly visible and - if not properly taken into account - would significantly affect the results of glare-point based particle sizing.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122522348","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221305
T. Auriac, J. Raoult
Near field vector measurement are used from optics to microwaves to identify and image materials and devices on the surface or buried under a thin layer of material. We developed a model of near field interaction between a dipole and a substrate based on our experimental setup of near field millimeter wave vector microscopy. A comparison between the model and the measurement results is presented and discussed.
{"title":"Experiments and Modeling of a Near-Field Millimeter Wave Vector Microscope","authors":"T. Auriac, J. Raoult","doi":"10.1109/PIERS59004.2023.10221305","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221305","url":null,"abstract":"Near field vector measurement are used from optics to microwaves to identify and image materials and devices on the surface or buried under a thin layer of material. We developed a model of near field interaction between a dipole and a substrate based on our experimental setup of near field millimeter wave vector microscopy. A comparison between the model and the measurement results is presented and discussed.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122788562","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221245
P. E. Sics, O. Selis, S. Migla, M. Zeltins, S. Spolitis, V. Kurtenoks, A. Aboltins
Energy efficiency is an important metric by which modern communications systems are evaluated. Pulse position modulation (PPM), which uses time intervals among pulses to encode the transmitted data, provides unlimited energy-saving opportunities at the cost of spectrum occupancy. Considering this excellent property, PPM is gaining attention as a candidate waveform for the next generation of long-distance and space communications, where energy efficiency and peak signal-to-noise ratio are the key factors. This paper is devoted to implementing and evaluating a high-speed transmitted reference pulse-position modulation (TR-PPM) modulator board that employs a digital-to-time converter (DTC) based on high-accuracy programmable delay line integrated circuits. The developed prototype can generate high-order TR-PPM signals with up to 256 pulse positions, having a time resolution of 40 ps. Using step recovery diodes (SRDs) at the front-end of the modulator allows for achieving a pulse duration of about 150 ps. The testing of the developed prototype has shown that the board can generate TR-PPM waveform with high accuracy and allows achieving data rates up to 20 Mbit/s.
{"title":"Programmable Delay Line Based High-speed PPM Modulator with 50 ps Time Resolution","authors":"P. E. Sics, O. Selis, S. Migla, M. Zeltins, S. Spolitis, V. Kurtenoks, A. Aboltins","doi":"10.1109/PIERS59004.2023.10221245","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221245","url":null,"abstract":"Energy efficiency is an important metric by which modern communications systems are evaluated. Pulse position modulation (PPM), which uses time intervals among pulses to encode the transmitted data, provides unlimited energy-saving opportunities at the cost of spectrum occupancy. Considering this excellent property, PPM is gaining attention as a candidate waveform for the next generation of long-distance and space communications, where energy efficiency and peak signal-to-noise ratio are the key factors. This paper is devoted to implementing and evaluating a high-speed transmitted reference pulse-position modulation (TR-PPM) modulator board that employs a digital-to-time converter (DTC) based on high-accuracy programmable delay line integrated circuits. The developed prototype can generate high-order TR-PPM signals with up to 256 pulse positions, having a time resolution of 40 ps. Using step recovery diodes (SRDs) at the front-end of the modulator allows for achieving a pulse duration of about 150 ps. The testing of the developed prototype has shown that the board can generate TR-PPM waveform with high accuracy and allows achieving data rates up to 20 Mbit/s.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126454219","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}
Pub Date : 2023-07-03DOI: 10.1109/PIERS59004.2023.10221243
Q. Didier, S. Arhab, G. Lefeuve-Mesgouez
We propose a numerical approach that combines both finite elements with volume and boundary integral methods. The boundary integral formulation replaces the far incident field source with a set of monopole and dipole sources, which are in the vicinity of the object and generate an equivalent illumination. Then the electromagnetic interaction between this incident field and the object under test is modeled by finite elements on a much smaller domain. The volume integral formulation is introduced to calculate semi-analytically the total field at any point outside the finite element discretization domain. Numerical results show that this approach speeds up the computation time, reduces the memory consumption, and does not suffer from a lack of accuracy when the source and observation points get more distant from the object, contrary to a pure finite element resolution. The proposed numerical approach is also successfully tested on the Fresnel Institute's microwave measurements.
{"title":"An Efficient Numerical Approach Combining Finite Element with Integral Methods","authors":"Q. Didier, S. Arhab, G. Lefeuve-Mesgouez","doi":"10.1109/PIERS59004.2023.10221243","DOIUrl":"https://doi.org/10.1109/PIERS59004.2023.10221243","url":null,"abstract":"We propose a numerical approach that combines both finite elements with volume and boundary integral methods. The boundary integral formulation replaces the far incident field source with a set of monopole and dipole sources, which are in the vicinity of the object and generate an equivalent illumination. Then the electromagnetic interaction between this incident field and the object under test is modeled by finite elements on a much smaller domain. The volume integral formulation is introduced to calculate semi-analytically the total field at any point outside the finite element discretization domain. Numerical results show that this approach speeds up the computation time, reduces the memory consumption, and does not suffer from a lack of accuracy when the source and observation points get more distant from the object, contrary to a pure finite element resolution. The proposed numerical approach is also successfully tested on the Fresnel Institute's microwave measurements.","PeriodicalId":354610,"journal":{"name":"2023 Photonics & Electromagnetics Research Symposium (PIERS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129343938","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}
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