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Implementation of a microwave sensor for the non-destructive detection of plant water stress 用于植物水分胁迫无损检测的微波传感器的实现
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133784
V. Lazzoni, R. Rossi, D. Brizi, F. Ugolini, S. Baronti, M. Moriondo, M. Bindi, A. Monorchio
{"title":"Implementation of a microwave sensor for the non-destructive detection of plant water stress","authors":"V. Lazzoni, R. Rossi, D. Brizi, F. Ugolini, S. Baronti, M. Moriondo, M. Bindi, A. Monorchio","doi":"10.23919/EuCAP57121.2023.10133784","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133784","url":null,"abstract":"In this paper, the preliminary results from a measurement campaign of a novel sensor for plants hydric stress monitoring are presented. The proposed microwave sensing system, working at a frequency of about 250 MHz, consists in a microstrip self-resonant spiral coil inductively coupled to an external concentric planar probe loop. The microwave sensing configuration is the result of an optimization procedure aimed at maximizing the spiral coil Q-factor, required to obtain high sensitivity. The experiments have been conducted on 22 maize plants (Zea mays L.) randomly divided into two water treatments: T25 (applying 25% of the irrigation requirements) and T100 (full watering). In particular, plant responses to soil water depletion were detected by monitoring the amplitude and frequency shift variation of the external planar probe input impedance acquired by the sensor. In accordance with the theoretical expectations, we detected an upshift in the inner spiral resonant frequency and a rise in the probe loop input impedance amplitude as irrigation water decreased. The obtained experimental results encourage future research, especially envisioning applications in precision agriculture. Indeed, the sensor might be employed to detect and real-time monitor the health status of maize plants, optimizing the resource deployment strategy accordingly.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128467354","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
Low-Profile UWB Probe For Precise Time-Domain Functional Imaging 用于精确时域功能成像的低轮廓超宽带探头
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133423
Youness Akazzim, O. Mrabet, L. Jofre-Roca
{"title":"Low-Profile UWB Probe For Precise Time-Domain Functional Imaging","authors":"Youness Akazzim, O. Mrabet, L. Jofre-Roca","doi":"10.23919/EuCAP57121.2023.10133423","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133423","url":null,"abstract":"In this paper a Double Ridge Waveguide (DRW) antenna fed by a microstrip line covering a frequency band from 0.5GHz to 2.5GHz is designed, fabricated, and measured, for functional microwave imaging. The proposed DRW antenna is used as the probe element in a collateral multi-static system to detect a cylindrical target located inside a human brain liquid medium. Also an approach for the spatial reconstruction accuracy based on maximum time resolution is presented. Measured and simulated results are conducted and discussed.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129005464","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 Encoding Capacity Chipless RFID Tag
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133353
M. Polivka, M. Svanda
{"title":"High Encoding Capacity Chipless RFID Tag","authors":"M. Polivka, M. Svanda","doi":"10.23919/EuCAP57121.2023.10133353","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133353","url":null,"abstract":"In this work, we introduce a novel chipless RFID tag with high encoding capacity, which uses sub-band frequency shift coding (SB-FSC) to increase the number of bits encoded by each resonator. The tag consists of an array of N variable-length microstrip line resonators, each with up to M = 9 notches (corresponding to digits 0-9) to encode N × log2M bits/tag. In addition, a pair of microstrip resonators serves as a frequency reference. A 60 × 80 mm2 proof-of-concept tag is demonstrated with 13 + 2 resonant microstrip elements (for GTIN-13 code) to provide 43 bits/tag. The tag operates in the frequency range from 1.4 to 4.2 GHz with a coding density 36.7 bits/λ2/GHz at the center frequency. The presented design thus enables the integration of chipless RFID technology with the GS1 standard systems and Internet of Things (IoT) paradigm.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"13 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129363806","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
Design and Testing Radome for D-band applications 设计和测试d波段应用的天线罩
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133295
A. Hujanen, A. Dimitriadis, J. Säily, V. Ermolov
{"title":"Design and Testing Radome for D-band applications","authors":"A. Hujanen, A. Dimitriadis, J. Säily, V. Ermolov","doi":"10.23919/EuCAP57121.2023.10133295","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133295","url":null,"abstract":"The paper presents results of characterization of dielectric properties of several commercial radome materials in D-band. It is demonstrated that there are commercial radome materials on the market already today which can be used for D-band radome. A multilayer radome based on selected materials Preperm RS260 and Rohacell HF is designed and tested. The radome demonstrates transmission losses not higher than 0.75 dB in the frequency band of 130 – 165 GHz. Usage of the radome in a combination with a D-band antenna array is studied.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124712762","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
Sub-THz Outdoor Urban Measurements and Multipath Propagation Characteristics 亚太赫兹室外城市测量和多径传播特性
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133525
Juyul Lee, Jae‐Joon Park, Kyung‐Won Kim, Heon-Kook Kwon, Myung-Don Kim
{"title":"Sub-THz Outdoor Urban Measurements and Multipath Propagation Characteristics","authors":"Juyul Lee, Jae‐Joon Park, Kyung‐Won Kim, Heon-Kook Kwon, Myung-Don Kim","doi":"10.23919/EuCAP57121.2023.10133525","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133525","url":null,"abstract":"This paper investigates sub-THz measurement-based multipath propagation characteristics. The measurements were collected in an outdoor urban environment at frequency of 159 GHz considering both LoS and NLoS link scenarios. With a rotationally-scanning directional antenna setup and a wideband sounder (5-GHz bandwidth), both spatial and temporal multipath power distributions were investigated. By comparing the multipath dispersion characteristics to the associated frequency-extrapolated 3GPP model parameters, which is valid only up to 100 GHz, we found that the delay spread and the angular spread statistics in the 3GPP model deviated from our 159-GHz measurement data.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129638415","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 new antenna array architecture with hybrid beamforming for broadband satellite communications 用于宽带卫星通信的混合波束形成天线阵结构
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133294
Margaux Pellet, G. Goussetis, H. Legay, J. Mota, Bingen Cortazar, G. Toso
{"title":"A new antenna array architecture with hybrid beamforming for broadband satellite communications","authors":"Margaux Pellet, G. Goussetis, H. Legay, J. Mota, Bingen Cortazar, G. Toso","doi":"10.23919/EuCAP57121.2023.10133294","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133294","url":null,"abstract":"In this paper, an antenna array architecture for broadband space communications with overlapped square subarrays is proposed. Analog and digital beamforming are performed consecutively at subarray level and across all subarrays. Subarrays are considered at digital beamforming level as large radiating elements, and thus the spacing between adjacent subarrays is not sufficient to prevent from interference. This leads to the creation of grating lobes. Overlapping methodologies have been studied in the literature and is an effective solution to mitigate this non-desired grating lobes. An overlapping strategy is proposed in this paper and can be seen as a shift by half the size of a subarray along 2-D. This enables a total mitigation of odd grating lobes. A comparison is made to benchmark this architecture performance compared to other existing strategies.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"21 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129681923","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
Research on the Performance of Automotive Antenna on Intelligent Connected Vehicle 智能网联汽车车载天线性能研究
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133113
Zhanyuan Gao, Zhigang Yang, Ran Liang, Siyang Sun
{"title":"Research on the Performance of Automotive Antenna on Intelligent Connected Vehicle","authors":"Zhanyuan Gao, Zhigang Yang, Ran Liang, Siyang Sun","doi":"10.23919/EuCAP57121.2023.10133113","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133113","url":null,"abstract":"The Intelligent Connected Vehicle (ICV) is an important part of Internet of Vehicle. Therefore, accurate evaluation of the wireless communication performance is critical for vehicle manufactures. Automotive antenna, which plays the key role in ICV, can’t be neglected. In this paper, the performance of automotive antenna will be studied by comparing the character of a communication antenna before and after installed on a simulated vehicle. In addition, the effect of different antenna installation positions on the over the air (OTA) performance should also be investigated, which could also make effect on the overall wireless performance of the Internet of Vehicle.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126699938","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 Modulated Metasurface Antenna for Multi-Beam Applications 用于多波束应用的低轮廓调制超表面天线
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133136
Yubo Wen, P. Qin, Y. Guo
{"title":"A Low Profile Modulated Metasurface Antenna for Multi-Beam Applications","authors":"Yubo Wen, P. Qin, Y. Guo","doi":"10.23919/EuCAP57121.2023.10133136","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133136","url":null,"abstract":"Modulated metasurface is considered as a good candidate for low-profile multi-beam antennas. Usually, a superposition method of all impedance modulations for different beams is used. However, a limitation of this method is that a very small number of beams can be generated due to the mutual interference of different impedance modulations, which will lead to low gains and high side lobe levels. It is found that the source locations for each beam play a key role in interference suppression. In this paper, instead of using the time consuming full-wave simulation-based optimization, the optimal source locations are obtained by using the aperture fields calculated from the zeroth-order approximation of the currents on the surface. To verify the design concept, a five-beam modulated metasurface antenna has been designed, fabricated and measured, providing an angular coverage up to ±30°. Good agreement between the simulation and measurement has been obtained.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126705023","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
Self-Healing Analysis of Distorted Weakly-Diffracting Vector Beams 扭曲弱衍射矢量光束的自愈分析
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133425
R. C. S. Pimenta, G. Soriano, Konstantinos D. Paschaloudis, M. Ettorre, M. Zerrad, C. Amra
{"title":"Self-Healing Analysis of Distorted Weakly-Diffracting Vector Beams","authors":"R. C. S. Pimenta, G. Soriano, Konstantinos D. Paschaloudis, M. Ettorre, M. Zerrad, C. Amra","doi":"10.23919/EuCAP57121.2023.10133425","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133425","url":null,"abstract":"A study of the self-healing property of weakly-diffractive vector beams radiated by a finite circular radiating aperture on an infinite ground plane is presented. The obstacle is a circular metallic disk, which is axially aligned and placed at a certain distance over the radiating aperture. Three different field distributions are considered as excitation for the aperture: the non-diffractive Bessel beam (BB), the Bessel-Gauss beam (BG), and the transverse electromagnetic mode (TEM) of a coaxial cable. The analysis is performed resorting to a spectral Green approach and to a Physical Optics (PO) framework. In all cases, a radially polarized beam is assumed. The results confirm the self-healing property of the non-diffracting beams. They also show the impact on the amplitude of the regenerated field due to the obstacle radius. The chosen approach is validated using a full-wave commercial software.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129132939","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
Determination of Antenna Displacement from a Single Cut Quasi-Farfield Pattern for Cylindrical Mode Filtering Applications 圆柱模滤波应用中单切准远场方向图天线位移的确定
2023 17th European Conference on Antennas and Propagation (EuCAP) Pub Date : 2023-03-26 DOI: 10.23919/EuCAP57121.2023.10133308
Zhong Chen, Yibo Wang, S. Gregson
{"title":"Determination of Antenna Displacement from a Single Cut Quasi-Farfield Pattern for Cylindrical Mode Filtering Applications","authors":"Zhong Chen, Yibo Wang, S. Gregson","doi":"10.23919/EuCAP57121.2023.10133308","DOIUrl":"https://doi.org/10.23919/EuCAP57121.2023.10133308","url":null,"abstract":"In the quasi-far-field, the tangential orthogonal electric field components, e.g., in the phi direction and z direction (in the cylindrical coordinate system), are decoupled, which means that only the co-polarized field component is sufficient to transform a single cut antenna pattern to the cylindrical mode domain. When the antenna pattern is measured with a displacement from the center of rotation, a phase coherent mathematical translation of the pattern to the center of rotation promotes mode separation between the modes of the antenna and those of the chamber reflections. A mode filter can then be applied to remove effects due to chamber multipath reflections. In this scheme, an accurate measurement of the displacement distance from the rotation center is essential. Conventionally, this is obtained by using a physical measure, e.g. ruler, laser tracker, etc. In this study, we investigate several techniques to automatically retrieve the requisite offset distance using the vector pattern data, including using: the unwrapped phase response, through time domain transformation, and by examining mode concentration within the spectrum domain. Each method is studied for its robustness, limitations and efficiency in accurately determining the displacement distance.","PeriodicalId":103360,"journal":{"name":"2023 17th European Conference on Antennas and Propagation (EuCAP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123892410","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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