Pub Date : 2022-05-09DOI: 10.1109/mms55062.2022.9825561
B. Fischer, G. Valério
In this paper we propose closed-form formulas for the effective refractive index of a wave propagating along two parallel corrugated surfaces arranged in a glide-symmetric configuration, having a small groove compared to the period. This kind of structure has proved to suppress the frequency dispersion typical of periodic material when the gap between the surfaces is small. The closed-form expressions show analytically this property and prove it for the first time, by means of the lack of a frequency dependence.
{"title":"Homogenization and Dispersion Properties of Glide-Symmetric Corrugated Metasurfaces","authors":"B. Fischer, G. Valério","doi":"10.1109/mms55062.2022.9825561","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825561","url":null,"abstract":"In this paper we propose closed-form formulas for the effective refractive index of a wave propagating along two parallel corrugated surfaces arranged in a glide-symmetric configuration, having a small groove compared to the period. This kind of structure has proved to suppress the frequency dispersion typical of periodic material when the gap between the surfaces is small. The closed-form expressions show analytically this property and prove it for the first time, by means of the lack of a frequency dependence.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126877433","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825548
Enrique López-Oliver, C. Tomassoni
In this paper, we provide an overview of the stere-olithography (SLA) manufacturing process applied to the design of microwave filters. For that purpose, a spherical cavity that operates with the higher order mode TE101 has been used in order to design filters oriented for additive manufacturing. The characteristics of such mode (high Q-factor and size) makes it an interesting choice for filters manufactured with 3-D printers. For validation purposes, two doublet prototypes with different configurations and mechanical structures have been manufactured with an SLA 3-D printer, metallized, and measured. Results show various discrepancies between the two prototypes: with measurements matching fairly well with the simulations for one prototype, while a certain frequency shift is present for the other one.
{"title":"Stereolithography Additive Manufacturing of Overmoded Spherical Filters","authors":"Enrique López-Oliver, C. Tomassoni","doi":"10.1109/mms55062.2022.9825548","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825548","url":null,"abstract":"In this paper, we provide an overview of the stere-olithography (SLA) manufacturing process applied to the design of microwave filters. For that purpose, a spherical cavity that operates with the higher order mode TE101 has been used in order to design filters oriented for additive manufacturing. The characteristics of such mode (high Q-factor and size) makes it an interesting choice for filters manufactured with 3-D printers. For validation purposes, two doublet prototypes with different configurations and mechanical structures have been manufactured with an SLA 3-D printer, metallized, and measured. Results show various discrepancies between the two prototypes: with measurements matching fairly well with the simulations for one prototype, while a certain frequency shift is present for the other one.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126305069","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825605
F. Giusti, S. Maci, E. Martini, M. Albani
In this work, numerically efficient surface field optimizations for transverse electric (TE) and magnetic (TM) polarizations are presented to design locally lossless and passive metasurfaces (MTSs) performing anomalous refraction. The MTS consists of the cascade of three patterned metallic layers, modeled through homogenized impedance sheets. A certain number of evanescent Floquet modes are introduced through an optimization procedure aiming at minimizing the real part of the sheets surface impedance. Numerical results show a good agreement between the two cases for a near-perfect anomalous refraction without reflection considering arbitrary incidence and refraction angles.
{"title":"Wide-Angle Anomalous Refraction Using Efficient Surface Field Optimization for Different Polarizations","authors":"F. Giusti, S. Maci, E. Martini, M. Albani","doi":"10.1109/mms55062.2022.9825605","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825605","url":null,"abstract":"In this work, numerically efficient surface field optimizations for transverse electric (TE) and magnetic (TM) polarizations are presented to design locally lossless and passive metasurfaces (MTSs) performing anomalous refraction. The MTS consists of the cascade of three patterned metallic layers, modeled through homogenized impedance sheets. A certain number of evanescent Floquet modes are introduced through an optimization procedure aiming at minimizing the real part of the sheets surface impedance. Numerical results show a good agreement between the two cases for a near-perfect anomalous refraction without reflection considering arbitrary incidence and refraction angles.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131312755","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825544
A. Morini, M. Farina, M. Guglielmi, P. M. Iglesias, P. Angeletti
The Generalized Reflect Thru Line (GTRL) calibration technique is used for the measurement of a waveguide devices operating in a multioctave band region. In this contribution some preliminary results are shown concerning measurements done up to the third harmonic, where up to four modes are above cutoff.
{"title":"Generalized Thru-Reflect-Line Calibration for the Measurement of Waveguide Devices up to the third Harmonic: First Results","authors":"A. Morini, M. Farina, M. Guglielmi, P. M. Iglesias, P. Angeletti","doi":"10.1109/mms55062.2022.9825544","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825544","url":null,"abstract":"The Generalized Reflect Thru Line (GTRL) calibration technique is used for the measurement of a waveguide devices operating in a multioctave band region. In this contribution some preliminary results are shown concerning measurements done up to the third harmonic, where up to four modes are above cutoff.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121425155","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825570
A. Mahmoud, M. Del Mastro, T. Potelon, R. Sauleau, M. Ettorre
A low-profile antenna for satellite communications (SatCom) applications is presented here. The antenna covers the entire K/Ka frequency bands from 19 GHz to 31 GHz with a reflection coefficient better than −10 dB, corresponding to a relative bandwidth of more than 50%. A continuous transverse stub (CTS) antenna array is chosen as a radiating aperture for its very wideband performance. The radiating aperture is fed by a pillbox quasi-optical beamformer. The full antenna is realized in printed circuit board (PCB) technology by stacking several dielectric layers without any buried or blind vias in the full stack-up. Multiple horns are placed along the focal plane of the pillbox coupler to achieve beam-scanning in elevation. ± 25°. The peak value of the realized gain is 19 dBi and radiation efficiency equals 50%.
{"title":"Mutli-layer CTS antenna array in PCB technology for SatCom applications","authors":"A. Mahmoud, M. Del Mastro, T. Potelon, R. Sauleau, M. Ettorre","doi":"10.1109/mms55062.2022.9825570","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825570","url":null,"abstract":"A low-profile antenna for satellite communications (SatCom) applications is presented here. The antenna covers the entire K/Ka frequency bands from 19 GHz to 31 GHz with a reflection coefficient better than −10 dB, corresponding to a relative bandwidth of more than 50%. A continuous transverse stub (CTS) antenna array is chosen as a radiating aperture for its very wideband performance. The radiating aperture is fed by a pillbox quasi-optical beamformer. The full antenna is realized in printed circuit board (PCB) technology by stacking several dielectric layers without any buried or blind vias in the full stack-up. Multiple horns are placed along the focal plane of the pillbox coupler to achieve beam-scanning in elevation. ± 25°. The peak value of the realized gain is 19 dBi and radiation efficiency equals 50%.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128845411","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825622
M. Barbuto, A. Alú, F. Bilotti, A. Toscano
Reconfigurability is a key property of modern communication systems, which need to adapt in real-time to changing environments and different operative conditions. Although several approaches to tailor the response of an electromagnetic system have been proposed, the quest for a complete and simple reconfigurable strategy is still far to be solved. Indeed, the possibility to tailor the response of the system typically involves a huge number of control lines and, thus, some critical issues for the practical implementation of the final design. In this framework, we discuss here the possibility of exploiting composite vortex theory for manipulating the response of reflective and radiating systems. In particular, by acting on a limited number of knobs, i.e. the relative amplitude and phase of two superimposed vortex modes, we show that both the radiating properties of patch antennas and the scattering pattern of reflective surfaces can be easily controlled.
{"title":"Designing Reconfigurable Reflective and Radiating Structures by Exploiting Composite Vortex Theory","authors":"M. Barbuto, A. Alú, F. Bilotti, A. Toscano","doi":"10.1109/mms55062.2022.9825622","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825622","url":null,"abstract":"Reconfigurability is a key property of modern communication systems, which need to adapt in real-time to changing environments and different operative conditions. Although several approaches to tailor the response of an electromagnetic system have been proposed, the quest for a complete and simple reconfigurable strategy is still far to be solved. Indeed, the possibility to tailor the response of the system typically involves a huge number of control lines and, thus, some critical issues for the practical implementation of the final design. In this framework, we discuss here the possibility of exploiting composite vortex theory for manipulating the response of reflective and radiating systems. In particular, by acting on a limited number of knobs, i.e. the relative amplitude and phase of two superimposed vortex modes, we show that both the radiating properties of patch antennas and the scattering pattern of reflective surfaces can be easily controlled.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129047169","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825614
P. Njogu, B. Sanz-Izquierdo, S. Jun, Zhijiao Chen, S. Gao
A 3D printed antenna embedded in a 3D printed ring for 5G millimeter wave applications is proposed. Two additive manufacturing (AM) methods have been combined in a single machine to develop the structure. Fused filament fabrication (FFF) was used to make the substrate of the antenna and supporting ring while direct write with conductive paste was used to create the antenna radiator. Polylactic acid (PLA) plastic was used in the development of the dielectric layers while the metallic patch of the radiator was created using silver paste. Reflection coefficient and radiation pattern of the ring antenna were tested in free space and worn on a hand phantom. The hand phantom was developed using pork sausages placed inside a thin glove. The design and simulations were carried out in CST Microwave StudioTM. Measured results show consistency with the simulated results. The antenna operates satisfactorily at the proposed 5G millimeter wave communication band. This work aims to demonstrate a concept of millimeter wave 3D printed ring antennas and the development and use of sausage-based hand phantoms for antenna measurements.
{"title":"3D Printed Millimeter wave Antenna Integrated into a Ring for 5G Applications","authors":"P. Njogu, B. Sanz-Izquierdo, S. Jun, Zhijiao Chen, S. Gao","doi":"10.1109/mms55062.2022.9825614","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825614","url":null,"abstract":"A 3D printed antenna embedded in a 3D printed ring for 5G millimeter wave applications is proposed. Two additive manufacturing (AM) methods have been combined in a single machine to develop the structure. Fused filament fabrication (FFF) was used to make the substrate of the antenna and supporting ring while direct write with conductive paste was used to create the antenna radiator. Polylactic acid (PLA) plastic was used in the development of the dielectric layers while the metallic patch of the radiator was created using silver paste. Reflection coefficient and radiation pattern of the ring antenna were tested in free space and worn on a hand phantom. The hand phantom was developed using pork sausages placed inside a thin glove. The design and simulations were carried out in CST Microwave StudioTM. Measured results show consistency with the simulated results. The antenna operates satisfactorily at the proposed 5G millimeter wave communication band. This work aims to demonstrate a concept of millimeter wave 3D printed ring antennas and the development and use of sausage-based hand phantoms for antenna measurements.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115936493","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825569
Rahul Yadav, S. Preu, A. Penirschke
Terahertz (THz) domain is quickly developing with various applications such as beam diagnostics at particle accelerators, spectroscopy, communications, space science, etc. However, often requiring fast intermediate frequency (IF) electronics. We present the design of a double mirror stub (DMS) based a planar broadband bias tee having an isolation port S31 with 14.45 GHz bandwidth below −10 dB and S33 with 13.1 GHz bandwidth above −2 dB. CST simulation and measured results are in very good agreement. The bias tee will be a part of a new generation of on-chip THz detectors based on zero-bias Schottky diode and high electron mobility field effect transistor (HEMT).
{"title":"A Double Mirror Stub Design of Broadband Planar Bias Tee for System on Chip Integration","authors":"Rahul Yadav, S. Preu, A. Penirschke","doi":"10.1109/mms55062.2022.9825569","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825569","url":null,"abstract":"Terahertz (THz) domain is quickly developing with various applications such as beam diagnostics at particle accelerators, spectroscopy, communications, space science, etc. However, often requiring fast intermediate frequency (IF) electronics. We present the design of a double mirror stub (DMS) based a planar broadband bias tee having an isolation port S31 with 14.45 GHz bandwidth below −10 dB and S33 with 13.1 GHz bandwidth above −2 dB. CST simulation and measured results are in very good agreement. The bias tee will be a part of a new generation of on-chip THz detectors based on zero-bias Schottky diode and high electron mobility field effect transistor (HEMT).","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117174036","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825589
S. Kılınç, Malik Ehsan Ejaz, S. Yarman, S. Ozoguz, S. Srivastava, Edmond Nurellari
Generation of proper source/load pull impedances for a selected active device is essential to design an RF power amplifier for optimum gain and power added efficiency. As they are obtained, these impedances may not be realizable network functions over the desired frequency band to yield the input and the output matching networks for the amplifier. Therefore, in this paper, we introduce a useful method to test if the generated source and load pull data are realizable. The proposed technique is employed to test the given source and load pull impedance data obtained from the 45W-GaN power transistor of Wolfspeed “CG2H40045” over 0.8-3.8 GHz bandwidth.
{"title":"A Realizability Test as Applied on the Generated Source/Load-Pull Data","authors":"S. Kılınç, Malik Ehsan Ejaz, S. Yarman, S. Ozoguz, S. Srivastava, Edmond Nurellari","doi":"10.1109/mms55062.2022.9825589","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825589","url":null,"abstract":"Generation of proper source/load pull impedances for a selected active device is essential to design an RF power amplifier for optimum gain and power added efficiency. As they are obtained, these impedances may not be realizable network functions over the desired frequency band to yield the input and the output matching networks for the amplifier. Therefore, in this paper, we introduce a useful method to test if the generated source and load pull data are realizable. The proposed technique is employed to test the given source and load pull impedance data obtained from the 45W-GaN power transistor of Wolfspeed “CG2H40045” over 0.8-3.8 GHz bandwidth.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115458419","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 : 2022-05-09DOI: 10.1109/mms55062.2022.9825573
I. Marasco, G. Niro, F. Rizzi, A. D’orazio, M. de Vittorio, M. Grande
Planar Inverted-F antennas (PIFAs), due to their planar topology and compact dimensions combined with multi-band working frequencies, are becoming increasingly popular in the scientific community and the technology industry places so much emphasis on them. The design and the fabrication of PIFAs on innovative substrates become crucial to facilitate their integration in wireless sensor network systems and to enhance the connectivity of Internet of Healthcare Things (IoHT) network nodes. In this work we propose the fabrication and characterization of a compact (13×26 mm2) PIF A placed on a flexible 250 um-thick Polyethylene Naphthalate (PEN) substrate working in both the sub-6GHz and 6GHz bands of 5G spectrum. The antenna has been realized by means of a multi-material 3D printer, NanoDimension's Dragonfly LTM. The use of the 3D printer entails the rapid prototyping and increases the scalability of the process.
{"title":"Dual band flexible Planar Inverted-F antenna for Internet of Healthcare Things applications","authors":"I. Marasco, G. Niro, F. Rizzi, A. D’orazio, M. de Vittorio, M. Grande","doi":"10.1109/mms55062.2022.9825573","DOIUrl":"https://doi.org/10.1109/mms55062.2022.9825573","url":null,"abstract":"Planar Inverted-F antennas (PIFAs), due to their planar topology and compact dimensions combined with multi-band working frequencies, are becoming increasingly popular in the scientific community and the technology industry places so much emphasis on them. The design and the fabrication of PIFAs on innovative substrates become crucial to facilitate their integration in wireless sensor network systems and to enhance the connectivity of Internet of Healthcare Things (IoHT) network nodes. In this work we propose the fabrication and characterization of a compact (13×26 mm2) PIF A placed on a flexible 250 um-thick Polyethylene Naphthalate (PEN) substrate working in both the sub-6GHz and 6GHz bands of 5G spectrum. The antenna has been realized by means of a multi-material 3D printer, NanoDimension's Dragonfly LTM. The use of the 3D printer entails the rapid prototyping and increases the scalability of the process.","PeriodicalId":124088,"journal":{"name":"2022 Microwave Mediterranean Symposium (MMS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115593309","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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