Pub Date : 2018-09-01DOI: 10.23919/EUMC.2018.8541764
A. Takacs, A. Okba, H. Aubert
This paper addresses a new topology of compact rectennas in which the rectifier is integrated directly on the radiating surface. The rectenna is designed for wireless power transmission or microwave energy harvesting application in ISM 900 MHz band and exhibits a very good measured conversion efficiency $(>mathbf{25}%)$ on a non-optimal load $(mathbf{10k}Omega)$ for very low microwave power densities $(> mathbf{0.18}mu mathbf{W}/mathbf{cm}^{mathbf{2}})$. The measured DC voltage $(> mathbf{330 mV}$ for microwave power density of at least 0.22 $mu mathbf{W}/mathbf{cm}^{mathbf{2}})$ obtained from this planar rectenna is in the range of the cold turn-on/start-up voltage of modern commercial off-the-shelf DC-to-DC boost converters and power management units. The proposed rectenna is also very compact: its physical surface $(mathbf{10.5} mathbf{x 6 cm}^{mathbf{2}})$ is only 5% of the square wavelength at the operating frequency (860 MHz).
本文提出了一种紧凑整流天线的新拓扑结构，其中整流直接集成在辐射表面上。该天线设计用于在ISM 900 MHz频段的无线电力传输或微波能量收集应用，并显示出非常好的测量转换效率 $(>mathbf{25}%)$ 在非最优负载上 $(mathbf{10k}Omega)$ 非常低的微波功率密度 $(> mathbf{0.18}mu mathbf{W}/mathbf{cm}^{mathbf{2}})$． 测量的直流电压 $(> mathbf{330 mV}$ 对于微波功率密度至少为0.22 $mu mathbf{W}/mathbf{cm}^{mathbf{2}})$ 从该平面整流天线获得的电压在现代商用dc - dc升压转换器和电源管理单元的冷开/启动电压范围内。拟议的整流天线也非常紧凑:它的物理表面 $(mathbf{10.5} mathbf{x 6 cm}^{mathbf{2}})$ 只有5% of the square wavelength at the operating frequency (860 MHz).
{"title":"Compact Planar Integrated Rectenna for Batteryless IoT Applications","authors":"A. Takacs, A. Okba, H. Aubert","doi":"10.23919/EUMC.2018.8541764","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541764","url":null,"abstract":"This paper addresses a new topology of compact rectennas in which the rectifier is integrated directly on the radiating surface. The rectenna is designed for wireless power transmission or microwave energy harvesting application in ISM 900 MHz band and exhibits a very good measured conversion efficiency $(>mathbf{25}%)$ on a non-optimal load $(mathbf{10k}Omega)$ for very low microwave power densities $(> mathbf{0.18}mu mathbf{W}/mathbf{cm}^{mathbf{2}})$. The measured DC voltage $(> mathbf{330 mV}$ for microwave power density of at least 0.22 $mu mathbf{W}/mathbf{cm}^{mathbf{2}})$ obtained from this planar rectenna is in the range of the cold turn-on/start-up voltage of modern commercial off-the-shelf DC-to-DC boost converters and power management units. The proposed rectenna is also very compact: its physical surface $(mathbf{10.5} mathbf{x 6 cm}^{mathbf{2}})$ is only 5% of the square wavelength at the operating frequency (860 MHz).","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"18 1","pages":"777-780"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80926709","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 : 2018-09-01DOI: 10.23919/EUMC.2018.8541767
F. Bagci, R. Rodríguez-Berral, F. Mesa, F. Medina
The study of classical analogues of electromagnetically induced transparency (EIT) or of its dual counterpart, electromagnetically induced reflection (EIR), has attracted the interest of many researchers in the field of optics and microwaves in recent years. Apart from the theoretical interest of the phenomenon, this effect has potential applications in practical systems demanding narrow band, slow light propagation and high non-linearity. The physical mechanism behind this phenomenon can be interpreted in terms of a coupled resonators system, which can be implemented by means of coupled resonant LC circuits. In this work we propose an extremely simple periodic electromagnetic system exhibiting EIR and a Foster-like circuit model involving uncoupled resonators accounting for the fundamental resonances of the electromagnetic structure. The specific unit cell treated in this contribution consists of three identical coupled slits made in a thin conducting plate. The features of the transmission band and the induced narrow transmission dips are easily explained in terms of the values of the parameters of the equivalent Foster-like circuit. Some rules for tailoring the location of the transmission dip and the bandwidth of the passband where the dip is located are given. The results obtained with the circuit model are validated by proper comparison with simulations carried out by using a commercial electromagnetic solver.
{"title":"Circuit Modeling of Electromagnetically Induced Reflection by Multiple Slits on a Metallic Screen","authors":"F. Bagci, R. Rodríguez-Berral, F. Mesa, F. Medina","doi":"10.23919/EUMC.2018.8541767","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541767","url":null,"abstract":"The study of classical analogues of electromagnetically induced transparency (EIT) or of its dual counterpart, electromagnetically induced reflection (EIR), has attracted the interest of many researchers in the field of optics and microwaves in recent years. Apart from the theoretical interest of the phenomenon, this effect has potential applications in practical systems demanding narrow band, slow light propagation and high non-linearity. The physical mechanism behind this phenomenon can be interpreted in terms of a coupled resonators system, which can be implemented by means of coupled resonant LC circuits. In this work we propose an extremely simple periodic electromagnetic system exhibiting EIR and a Foster-like circuit model involving uncoupled resonators accounting for the fundamental resonances of the electromagnetic structure. The specific unit cell treated in this contribution consists of three identical coupled slits made in a thin conducting plate. The features of the transmission band and the induced narrow transmission dips are easily explained in terms of the values of the parameters of the equivalent Foster-like circuit. Some rules for tailoring the location of the transmission dip and the bandwidth of the passband where the dip is located are given. The results obtained with the circuit model are validated by proper comparison with simulations carried out by using a commercial electromagnetic solver.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"19 1","pages":"145-148"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81969598","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 : 2018-09-01DOI: 10.23919/EUMIC.2018.8539948
Cheng Guo, J. Powell, X. Shang, M. Lancaster, Jun Xu, C. Viegas
A W-band Schottky diode based frequency tripler which uses waveguide resonator filters for low loss impedance matching is presented in this paper. Impedance matching of the diodes is achieved by scaling the external quality factors and adjusting the resonant frequencies of the filter cavities. This removes most of the matching structures from the high loss microstrip circuit to the lower loss waveguide resonators. Here the output frequency of the tripler is set to be 90 GHz with a 10% bandwidth. The simulation shows a conversion loss of 13−13.8 dB in the pass-band with an input power of 13−20 dBm. The measured conversion loss over the pass-band is 13.6−15.8 dB for 17 dBm input power and better than 14 dB at 90 GHz for 13−20 dBm input power.
{"title":"A W-Band Frequency Tripler with Integrated Waveguide Filter Matching","authors":"Cheng Guo, J. Powell, X. Shang, M. Lancaster, Jun Xu, C. Viegas","doi":"10.23919/EUMIC.2018.8539948","DOIUrl":"https://doi.org/10.23919/EUMIC.2018.8539948","url":null,"abstract":"A W-band Schottky diode based frequency tripler which uses waveguide resonator filters for low loss impedance matching is presented in this paper. Impedance matching of the diodes is achieved by scaling the external quality factors and adjusting the resonant frequencies of the filter cavities. This removes most of the matching structures from the high loss microstrip circuit to the lower loss waveguide resonators. Here the output frequency of the tripler is set to be 90 GHz with a 10% bandwidth. The simulation shows a conversion loss of 13−13.8 dB in the pass-band with an input power of 13−20 dBm. The measured conversion loss over the pass-band is 13.6−15.8 dB for 17 dBm input power and better than 14 dB at 90 GHz for 13−20 dBm input power.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"369 1","pages":"1317-1320"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76444382","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 : 2018-09-01DOI: 10.23919/EUMC.2018.8541431
S. Smirnov, I. Anoshkin, D. Lioubtchenko, J. Oberhammer
We propose an approach for efficient modeling of thin carbon nanotube layers for full-wave device simulations without increasing the number of simulation mesh cells. A surface impedance, used in computer simulations, is calculated from the dielectric constant of the material. The dielectric constant is modeled by a Drude-Lorentz resonance, fitted to experimental results. The approach allowed to study the nanotube-induced losses and finite-size resonance effects in optically-controlled, dielectric rod waveguide-based phase shifters. The correctness of the model was verified both by the simulated and the measured S-parameters in the W-band.
{"title":"Carbon Nanotube Layer Modeling for Computer Simulation of Optically Controlled Phase Shifters","authors":"S. Smirnov, I. Anoshkin, D. Lioubtchenko, J. Oberhammer","doi":"10.23919/EUMC.2018.8541431","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541431","url":null,"abstract":"We propose an approach for efficient modeling of thin carbon nanotube layers for full-wave device simulations without increasing the number of simulation mesh cells. A surface impedance, used in computer simulations, is calculated from the dielectric constant of the material. The dielectric constant is modeled by a Drude-Lorentz resonance, fitted to experimental results. The approach allowed to study the nanotube-induced losses and finite-size resonance effects in optically-controlled, dielectric rod waveguide-based phase shifters. The correctness of the model was verified both by the simulated and the measured S-parameters in the W-band.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"16 4 1","pages":"827-830"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77557952","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}
Patrik Grüne, Son Nguyen, T. Chaloun, C. Waldschmidt
Biomimetic Antenna Arrays (BMAAs) are able to enhance the angle estimation of miniaturized radar sensors by mimicking the hearing system of a fly. This technique has significant advantages over conventional approaches when only limited space is available. While recent works show the enhancement for targets in the vicinity of the boresight direction only, this work presents a more generalized design methodology to enhance the angle estimation for off-boresight targets. Radar measurements of a realized BMAA have been conducted and show a significant increase in angle estimation capability compared to a conventional antenna array at a target angle of 20 degrees,
{"title":"Enhancing Angle Estimation for Off-Boresight Targets Using Biomimetic Antenna Arrays","authors":"Patrik Grüne, Son Nguyen, T. Chaloun, C. Waldschmidt","doi":"10.18725/OPARU-9864","DOIUrl":"https://doi.org/10.18725/OPARU-9864","url":null,"abstract":"Biomimetic Antenna Arrays (BMAAs) are able to enhance the angle estimation of miniaturized radar sensors by mimicking the hearing system of a fly. This technique has significant advantages over conventional approaches when only limited space is available. While recent works show the enhancement for targets in the vicinity of the boresight direction only, this work presents a more generalized design methodology to enhance the angle estimation for off-boresight targets. Radar measurements of a realized BMAA have been conducted and show a significant increase in angle estimation capability compared to a conventional antenna array at a target angle of 20 degrees,","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"20 1","pages":"1377-1380"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78101266","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 : 2018-09-01DOI: 10.23919/EUMC.2018.8541701
S. Churkin, A. Mozharovskiy, Alexander Myskov, A. Artemenko, R. Maslennikov
The paper describes a waveguide to planar differential line transition realized on Rogers RO4350B substrate and operating in the V band. The transition is based on a differentially-fed patch radiating element that excites a rectangular waveguide through a compact U-shaped metal adapter. The response of a single transition has been extracted from the measurement results of the fabricated back-to-back structure using a TRL calibration standard realized on the same substrate. It also allowed to accurately calibrate the differential line loss. The transition provides maximum 0.8 dB insertion loss and more than 15 dB return loss over the 57–64 GHz frequency band, whereas differential line loss of 1.3 dB per centimeter is mainly determined by the chosen substrate material. High performance and cost-effective design makes the proposed transition highly promising for different mm Wave transceivers and for verification of custom planar devices using standard waveguide test equipment.
本文介绍了一种在罗杰斯ro450b衬底上实现的V波段波导到平面差分线的转换。这种过渡是基于一个差分馈电贴片辐射元件，通过一个紧凑的u形金属适配器激发一个矩形波导。利用在同一衬底上实现的TRL校准标准，从制造背靠背结构的测量结果中提取了单个跃迁的响应。它还允许准确校准差分线损耗。在57-64 GHz频段内，这种转换提供了最大0.8 dB的插入损耗和超过15 dB的回波损耗，而1.3 dB / cm的差分线损耗主要取决于所选择的衬底材料。高性能和高性价比的设计使得所提出的转换对于不同的毫米波收发器和使用标准波导测试设备验证定制平面器件非常有希望。
{"title":"Top-Layer Wideband Transition from Waveguide to Planar Differential Line for 60 GHz Applications","authors":"S. Churkin, A. Mozharovskiy, Alexander Myskov, A. Artemenko, R. Maslennikov","doi":"10.23919/EUMC.2018.8541701","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541701","url":null,"abstract":"The paper describes a waveguide to planar differential line transition realized on Rogers RO4350B substrate and operating in the V band. The transition is based on a differentially-fed patch radiating element that excites a rectangular waveguide through a compact U-shaped metal adapter. The response of a single transition has been extracted from the measurement results of the fabricated back-to-back structure using a TRL calibration standard realized on the same substrate. It also allowed to accurately calibrate the differential line loss. The transition provides maximum 0.8 dB insertion loss and more than 15 dB return loss over the 57–64 GHz frequency band, whereas differential line loss of 1.3 dB per centimeter is mainly determined by the chosen substrate material. High performance and cost-effective design makes the proposed transition highly promising for different mm Wave transceivers and for verification of custom planar devices using standard waveguide test equipment.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"31 1","pages":"663-666"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74001819","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 : 2018-09-01DOI: 10.23919/EUMC.2018.8541510
J. Malherbe
A bandpass filter design is proposed that is based on a transmission line transform that transforms an open circuit series stub to a short circuited shunt stub. The transform was originally proposed for the design of pseudo-highpass filters, and is exact only at the band-edge frequency of the design. In this paper the transform is applied to the design of bandpass filters that is based on the classic redundant filter design, but with the application of the new transform.
{"title":"Application of a Series Open Circuit Stub Transform to Bandpass Filter Design","authors":"J. Malherbe","doi":"10.23919/EUMC.2018.8541510","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541510","url":null,"abstract":"A bandpass filter design is proposed that is based on a transmission line transform that transforms an open circuit series stub to a short circuited shunt stub. The transform was originally proposed for the design of pseudo-highpass filters, and is exact only at the band-edge frequency of the design. In this paper the transform is applied to the design of bandpass filters that is based on the classic redundant filter design, but with the application of the new transform.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"7 1","pages":"368-371"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74096234","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 : 2018-09-01DOI: 10.23919/EUMC.2018.8541638
Simone Battistutta, M. Bozzi, M. Bressan, L. Perregrini
This paper presents the application of the generalized boundary integral-resonant mode expansion (BI-RME) method to the analysis of dielectric-loaded waveguide filters. The method is based on the segmentation/recombination technique, which permits to divide the component into homogeneously-filled building blocks. The BI-RME method is used to calculate the generalized admittance matrix (GAM) of each arbitrarily shaped building block by solving an integral equation, which is obtained enforcing the appropriate boundary condition to the electromagnetic field. The GAMs are then cascaded to obtain the frequency response of the whole component. Any possible shape of the interconnecting surfaces can be treated with this implementation due to the adoption of the RWG basis functions to represent the unknown electric and magnetic surface currents. The theory of the method is outlined in this paper, and a numerical example demonstrates the capabilities of the proposed algorithm.
{"title":"Analysis of Dielectric-Loaded Waveguide Filters by the Generalized BI-RME Method","authors":"Simone Battistutta, M. Bozzi, M. Bressan, L. Perregrini","doi":"10.23919/EUMC.2018.8541638","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541638","url":null,"abstract":"This paper presents the application of the generalized boundary integral-resonant mode expansion (BI-RME) method to the analysis of dielectric-loaded waveguide filters. The method is based on the segmentation/recombination technique, which permits to divide the component into homogeneously-filled building blocks. The BI-RME method is used to calculate the generalized admittance matrix (GAM) of each arbitrarily shaped building block by solving an integral equation, which is obtained enforcing the appropriate boundary condition to the electromagnetic field. The GAMs are then cascaded to obtain the frequency response of the whole component. Any possible shape of the interconnecting surfaces can be treated with this implementation due to the adoption of the RWG basis functions to represent the unknown electric and magnetic surface currents. The theory of the method is outlined in this paper, and a numerical example demonstrates the capabilities of the proposed algorithm.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"12 1","pages":"444-447"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74586024","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 : 2018-09-01DOI: 10.23919/EUMC.2018.8541812
F. Mastri, M. Mongiardo, G. Monti, L. Tarricone, A. Costanzo
In this paper a resonant inductive wireless power transfer link using two relay resonators is analyzed. The network formalism is adopted to model the link and standard gain functions are used to describe the two-port network performance. The case where the load and the source are given and the goal is to find the optimal parameters of the link is solved. Analytical expressions are derived and validated through circuital simulations. It is demonstrated that by acting on the couplings of the relay elements with the transmitting and the receiving resonators it is possible to maximize all the three gains (power, available and transducer gains).
{"title":"Optimal Couplings for a Four-coils WPT Link","authors":"F. Mastri, M. Mongiardo, G. Monti, L. Tarricone, A. Costanzo","doi":"10.23919/EUMC.2018.8541812","DOIUrl":"https://doi.org/10.23919/EUMC.2018.8541812","url":null,"abstract":"In this paper a resonant inductive wireless power transfer link using two relay resonators is analyzed. The network formalism is adopted to model the link and standard gain functions are used to describe the two-port network performance. The case where the load and the source are given and the goal is to find the optimal parameters of the link is solved. Analytical expressions are derived and validated through circuital simulations. It is demonstrated that by acting on the couplings of the relay elements with the transmitting and the receiving resonators it is possible to maximize all the three gains (power, available and transducer gains).","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"1 1","pages":"182-185"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74743188","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 : 2018-09-01DOI: 10.23919/EURAD.2018.8546525
I. Wolff
In this paper mode conversion processes in dielectric spherical resonators under the influence of conductor losses are discussed. Investigated are cavity modes, open sphere interior and exterior modes and newly detected “lost modes”. Their physical connections and properties are discussed. It is shown that the multilayer spherical resonator is a very complex system with many unknown properties.
{"title":"Mode Conversion Processes in Multilayer Spherical Resonators","authors":"I. Wolff","doi":"10.23919/EURAD.2018.8546525","DOIUrl":"https://doi.org/10.23919/EURAD.2018.8546525","url":null,"abstract":"In this paper mode conversion processes in dielectric spherical resonators under the influence of conductor losses are discussed. Investigated are cavity modes, open sphere interior and exterior modes and newly detected “lost modes”. Their physical connections and properties are discussed. It is shown that the multilayer spherical resonator is a very complex system with many unknown properties.","PeriodicalId":6472,"journal":{"name":"2018 48th European Microwave Conference (EuMC)","volume":"14 1","pages":"1501-1504"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79799292","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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