Pub Date : 2016-11-14DOI: 10.1109/LAPC.2016.7807512
M. Benamara, M. Grzeskowiak, Miyassa Salhi, Gaelle, Lissorgues, A. Diet, Y. Bihan
Herein, a 3D 13, 56 MHz (HF) RFID reader antenna is proposed in order to optimize detection performance whatever the tag angular positioning. The design is made of a multi-loop structure, based on serial complementary antennas, as said “twisted” antennas. The RFID tag detection is optimized by two factors which rely on the modifications of the magnetic field (i) vectorial distribution and (ii) magnitude density. The reader antenna design is analyzed with electromagnetic simulation under HFSS (High Frequency Electromagnetic Field Simulation), and validated by detection measurements, in coplanar mode. A multi-loop structure, composed by 4 sub-loops, is then conformed onto a tube surface to provide the 3D structure. The goal of this improvement is to provide tag detection for any angular positions. At the center of the tube (3D reader structure), the detection of the tag is performed whatever its angular orientation, that is to say for any radial orientation.
{"title":"3D HF RFID reader antenna for tag detection in different angular orientations","authors":"M. Benamara, M. Grzeskowiak, Miyassa Salhi, Gaelle, Lissorgues, A. Diet, Y. Bihan","doi":"10.1109/LAPC.2016.7807512","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807512","url":null,"abstract":"Herein, a 3D 13, 56 MHz (HF) RFID reader antenna is proposed in order to optimize detection performance whatever the tag angular positioning. The design is made of a multi-loop structure, based on serial complementary antennas, as said “twisted” antennas. The RFID tag detection is optimized by two factors which rely on the modifications of the magnetic field (i) vectorial distribution and (ii) magnitude density. The reader antenna design is analyzed with electromagnetic simulation under HFSS (High Frequency Electromagnetic Field Simulation), and validated by detection measurements, in coplanar mode. A multi-loop structure, composed by 4 sub-loops, is then conformed onto a tube surface to provide the 3D structure. The goal of this improvement is to provide tag detection for any angular positions. At the center of the tube (3D reader structure), the detection of the tag is performed whatever its angular orientation, that is to say for any radial orientation.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128189092","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 : 2016-11-14DOI: 10.1109/LAPC.2016.7807511
Hussein K. Srour, R. Gillard, S. Méric, Divitha Seetheramdoo
In this paper, a study on a flattened dihedral using reflect array approach is presented and a method is proposed to improve its performance. The dihedral-equipped with phase-shifting cells-obeys the retro directive phase law to redirect the wave back in the same direction of incidence. This retro-law is derived in function of the geometry parameters and plane wave incidence angle using simple trigonometric relations. It is shown that the reflected signal from the first panel hits the other panel with very oblique incidence angle. Due to that, the phase responses of the cells-designed using the classical normal incidence setup-get deteriorated to the extent they no more obey the required phase law. Upon this information, new setup is proposed to enhance the functionality of the cells and hence enhance the retro directive behavior of the dihedral at 24 GHz. Simulations using Ansoft® HFSS software have been performed to validate this method.
{"title":"Improved retrodirective flattened dihedral using incidence angle correction","authors":"Hussein K. Srour, R. Gillard, S. Méric, Divitha Seetheramdoo","doi":"10.1109/LAPC.2016.7807511","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807511","url":null,"abstract":"In this paper, a study on a flattened dihedral using reflect array approach is presented and a method is proposed to improve its performance. The dihedral-equipped with phase-shifting cells-obeys the retro directive phase law to redirect the wave back in the same direction of incidence. This retro-law is derived in function of the geometry parameters and plane wave incidence angle using simple trigonometric relations. It is shown that the reflected signal from the first panel hits the other panel with very oblique incidence angle. Due to that, the phase responses of the cells-designed using the classical normal incidence setup-get deteriorated to the extent they no more obey the required phase law. Upon this information, new setup is proposed to enhance the functionality of the cells and hence enhance the retro directive behavior of the dihedral at 24 GHz. Simulations using Ansoft® HFSS software have been performed to validate this method.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126098739","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 : 2016-11-14DOI: 10.1109/LAPC.2016.7807500
J. Floc'h, I. Ben Trad
Frequency reconfigurable antennas present an attractive alternative to meet Cognitive Radio (CR) system requirements. In this paper, a multiband planar inverted F-antenna (PIFA) with frequency agility characteristic was designed and numerically studied for ISM applications. A varactor diode was incorporated in the corner between the radiating patch and the added floating ground plane. By applying a reverse voltage V, three resonance frequencies can be electrically controlled. Wide tuning frequency ranges were obtained; F1 can be shifted from 650 to 896 MHz, F2 from 954 to 1379 MHz and F3 from 1502 to 2457 MHz. The reference and the active antennas were manufactured and characterized. Simulations and measurements are presented and discussed.
{"title":"Printed frequency reconfigurable planar inverted-F antenna for ISM applications","authors":"J. Floc'h, I. Ben Trad","doi":"10.1109/LAPC.2016.7807500","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807500","url":null,"abstract":"Frequency reconfigurable antennas present an attractive alternative to meet Cognitive Radio (CR) system requirements. In this paper, a multiband planar inverted F-antenna (PIFA) with frequency agility characteristic was designed and numerically studied for ISM applications. A varactor diode was incorporated in the corner between the radiating patch and the added floating ground plane. By applying a reverse voltage V, three resonance frequencies can be electrically controlled. Wide tuning frequency ranges were obtained; F1 can be shifted from 650 to 896 MHz, F2 from 954 to 1379 MHz and F3 from 1502 to 2457 MHz. The reference and the active antennas were manufactured and characterized. Simulations and measurements are presented and discussed.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"10 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128174328","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807561
M. Berg, Rameez U. R. Rahman Lighari, T. Tuovinen, E. Salonen
In this paper a compact dual-feed Global Positioning System (GPS) antenna for simultaneous left- and right hand circularly polarized wave reception is presented. The antenna structure consists of a single patch antenna on top of a printed circuit board and two aperture coupled feeds in the ground plane which are used to generate both left- and right-hand (LH and RH) circular polarizations for the patch. The feed network is implemented as a 2-section branch-line coupler underneath the ground plane. It is able to generate adequate phase shifts for both LH and RH circular polarizations simultaneously via two feed ports. Due to the aperture coupling and coupler implementation three layer printed circuit board approach is used. The measured axial ratio is <; 1.35 for both polarizations over the 24 MHz bandwidth at the frequency of 1.575 GHz. The isolation between the LH and RH feed ports in reception mode is -35... -26 dB in the broadside direction. The antenna enables simultaneous direct and multipath signal measurement with equal spatial coordinates for both polarizations.
{"title":"Circularly polarized GPS antenna for simultaneous LHCP and RHCP reception with high isolation","authors":"M. Berg, Rameez U. R. Rahman Lighari, T. Tuovinen, E. Salonen","doi":"10.1109/LAPC.2016.7807561","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807561","url":null,"abstract":"In this paper a compact dual-feed Global Positioning System (GPS) antenna for simultaneous left- and right hand circularly polarized wave reception is presented. The antenna structure consists of a single patch antenna on top of a printed circuit board and two aperture coupled feeds in the ground plane which are used to generate both left- and right-hand (LH and RH) circular polarizations for the patch. The feed network is implemented as a 2-section branch-line coupler underneath the ground plane. It is able to generate adequate phase shifts for both LH and RH circular polarizations simultaneously via two feed ports. Due to the aperture coupling and coupler implementation three layer printed circuit board approach is used. The measured axial ratio is <; 1.35 for both polarizations over the 24 MHz bandwidth at the frequency of 1.575 GHz. The isolation between the LH and RH feed ports in reception mode is -35... -26 dB in the broadside direction. The antenna enables simultaneous direct and multipath signal measurement with equal spatial coordinates for both polarizations.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115372042","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807558
P. Vasina, J. Lacik
In this paper a linearly polarization reconfigurable substrate integrated waveguide (SIW) circular ring slot antenna for 5.8 GHz ISM band is proposed. The antenna consists of two dielectric layers: a feeding layer and a radiator layer. In the feeding layer, an SIW operating in the fundamental mode TE10 is accommodated. The radiator layer, which is fed by the SIW, contains etched circular ring-slot. The proposed antenna has a broadside radiation pattern and radiates linearly polarized wave which can be controlled in the range of the angles ± 45° with respect to the longitudinal axis of the antenna.
{"title":"Polarization reconfigurable SIW circular ring-slot antenna","authors":"P. Vasina, J. Lacik","doi":"10.1109/LAPC.2016.7807558","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807558","url":null,"abstract":"In this paper a linearly polarization reconfigurable substrate integrated waveguide (SIW) circular ring slot antenna for 5.8 GHz ISM band is proposed. The antenna consists of two dielectric layers: a feeding layer and a radiator layer. In the feeding layer, an SIW operating in the fundamental mode TE10 is accommodated. The radiator layer, which is fed by the SIW, contains etched circular ring-slot. The proposed antenna has a broadside radiation pattern and radiates linearly polarized wave which can be controlled in the range of the angles ± 45° with respect to the longitudinal axis of the antenna.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115682641","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807491
B. El Jaafari, J. Floc'h
This paper presents a high-gain antenna for non-contact measurement systems around the frequency ~26GHz. The proposed antenna consists of a slot antenna on a metallic grooved structure with a single frequency selective surface. A small size and improved gain performance are the key objectives of this design. To achieve these two objectives, we use an optimization procedure based on a global algorithm. Both simulation and optimization are carried out by means of a full-wave electromagnetic simulation tool. Afterward, a prototype of the proposed antenna has been manufactured in order to verify their performances. More than 15dB of gain is obtained over the operating frequency range, with approximately 17dB at the frequency 25.5GHz. the small size and high-gain characteristics make this antenna very suitable for non-contact measurement, especially for short-range radar sensors.
{"title":"High-gain slot antenna on a grooved structure with a frequency selective surface","authors":"B. El Jaafari, J. Floc'h","doi":"10.1109/LAPC.2016.7807491","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807491","url":null,"abstract":"This paper presents a high-gain antenna for non-contact measurement systems around the frequency ~26GHz. The proposed antenna consists of a slot antenna on a metallic grooved structure with a single frequency selective surface. A small size and improved gain performance are the key objectives of this design. To achieve these two objectives, we use an optimization procedure based on a global algorithm. Both simulation and optimization are carried out by means of a full-wave electromagnetic simulation tool. Afterward, a prototype of the proposed antenna has been manufactured in order to verify their performances. More than 15dB of gain is obtained over the operating frequency range, with approximately 17dB at the frequency 25.5GHz. the small size and high-gain characteristics make this antenna very suitable for non-contact measurement, especially for short-range radar sensors.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117169179","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807574
L. M. de la Torre Rodriguez, L. L. Bravo Roger, J. Pissolato Filho, Yuso Iano, H. Hernandez Figueroa, M. Sánchez-Soriano, A. A. C. Alves
A multiphysics study of the electromagnetic behavior of a filter designed for use in high-power microwave systems is presented. In the past, the methodology used to design filters generally assumed ideal working conditions for these devices. However, when such filters are used in a real environment, factors such as temperature and working power affect their performance. Here, we use modern simulation tools to evaluate the electromagnetic response of a filter at different temperatures and under different operating conditions.
{"title":"Predicting the effect of variations in ambient temperature and operating power on the response of a microwave filter","authors":"L. M. de la Torre Rodriguez, L. L. Bravo Roger, J. Pissolato Filho, Yuso Iano, H. Hernandez Figueroa, M. Sánchez-Soriano, A. A. C. Alves","doi":"10.1109/LAPC.2016.7807574","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807574","url":null,"abstract":"A multiphysics study of the electromagnetic behavior of a filter designed for use in high-power microwave systems is presented. In the past, the methodology used to design filters generally assumed ideal working conditions for these devices. However, when such filters are used in a real environment, factors such as temperature and working power affect their performance. Here, we use modern simulation tools to evaluate the electromagnetic response of a filter at different temperatures and under different operating conditions.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127134953","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807610
S. Dakhli, H. Rmili, J. Floc'h, F. Choubani
In this work, the design of a superdirective and compact two elements antenna array is reported. This antenna system is based on a capacitively loaded loop (CLL) driven by an electrically small monopole antenna. This elementary antenna is then used in a two elements compact parasitic array, in order to achieve a higher directivity. The two elements of this array are identical, but only one of them is driven, the other one is used as a parasitic element. The design of the elementary antenna, its simulated radiation performance, as well as those of the parasitic array are reported. Two corresponding prototypes were fabricated and tested. The measured impedance mismatch and radiation pattern results are presented and are shown to be in good agreement with their simulated values.
{"title":"A novel compact and superdirective two elements antenna array","authors":"S. Dakhli, H. Rmili, J. Floc'h, F. Choubani","doi":"10.1109/LAPC.2016.7807610","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807610","url":null,"abstract":"In this work, the design of a superdirective and compact two elements antenna array is reported. This antenna system is based on a capacitively loaded loop (CLL) driven by an electrically small monopole antenna. This elementary antenna is then used in a two elements compact parasitic array, in order to achieve a higher directivity. The two elements of this array are identical, but only one of them is driven, the other one is used as a parasitic element. The design of the elementary antenna, its simulated radiation performance, as well as those of the parasitic array are reported. Two corresponding prototypes were fabricated and tested. The measured impedance mismatch and radiation pattern results are presented and are shown to be in good agreement with their simulated values.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124873270","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807602
Baraa F. Al-Azzawi, J. Rigelsford
This paper describes an experimental investigation into improving the detect-ability of passive RFID tags. Previous work published by the authors considered a novel passive chip less RFID tag for subcutaneous implant. This work investigates practical validation of gain enhancement techniques, aiming to improve tag detect-ability in the highly attenuating environment of the human body. Two passive tags are considered, a uniform cross shaped resonator, and a folded (Gammadion) cross having a physical aperture 45% less than that of the uniform cross. Arrays of elements have been used to improve the detect-ability of the tag. It has been shown that with the folded cross it was possible to accommodate more elements on the tag without increasing the original physical aperture. Improved tag detect-ability with reduced size is ideal for any implantable medical device.
{"title":"Experimental investigation into improving the detectability of passive RFID tags","authors":"Baraa F. Al-Azzawi, J. Rigelsford","doi":"10.1109/LAPC.2016.7807602","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807602","url":null,"abstract":"This paper describes an experimental investigation into improving the detect-ability of passive RFID tags. Previous work published by the authors considered a novel passive chip less RFID tag for subcutaneous implant. This work investigates practical validation of gain enhancement techniques, aiming to improve tag detect-ability in the highly attenuating environment of the human body. Two passive tags are considered, a uniform cross shaped resonator, and a folded (Gammadion) cross having a physical aperture 45% less than that of the uniform cross. Arrays of elements have been used to improve the detect-ability of the tag. It has been shown that with the folded cross it was possible to accommodate more elements on the tag without increasing the original physical aperture. Improved tag detect-ability with reduced size is ideal for any implantable medical device.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126087043","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 : 2016-11-01DOI: 10.1109/LAPC.2016.7807580
K. L. Ford, Karan H. Shah
This paper presents various case studies for meta surface design for plane-wave to plane-wave scattering using electric and magnetic susceptibilities. The case studies look at the practical implications and potential simplifications to ideal meta surface proprieties and how these impact on the scattering patterns of such structures. Specifically we address normal and oblique incidence scattering as well as scattering multiple plane-waves from a surface.
{"title":"A study on the use of metasurface synthesis using electric and magnetic susceptibility","authors":"K. L. Ford, Karan H. Shah","doi":"10.1109/LAPC.2016.7807580","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807580","url":null,"abstract":"This paper presents various case studies for meta surface design for plane-wave to plane-wave scattering using electric and magnetic susceptibilities. The case studies look at the practical implications and potential simplifications to ideal meta surface proprieties and how these impact on the scattering patterns of such structures. Specifically we address normal and oblique incidence scattering as well as scattering multiple plane-waves from a surface.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126743097","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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