Pub Date : 2016-11-01DOI: 10.1109/LAPC.2016.7807575
Ammar H. Ali, R. Abd‐Alhameed, J. Noras, M. B. Child
This paper presents a design procedure for a physically small, equal phase and equal power, 1-to-4 ultra-wideband Wilkinson power divider is presented. Initially, a 1-to-2 divider was designed and optimized for the full 3.1 GHz to 10.6 GHz range. The 1-to-4 divider was realized using three 1 to 2 dividers, and further optimized for full band insertion loss, return loss, and isolation. The circuits were constructed using a 0.75mm thick Rogers RO3035 substrate, and experimentally validated.
{"title":"An ultra wide band power divider for antenna array feeding network","authors":"Ammar H. Ali, R. Abd‐Alhameed, J. Noras, M. B. Child","doi":"10.1109/LAPC.2016.7807575","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807575","url":null,"abstract":"This paper presents a design procedure for a physically small, equal phase and equal power, 1-to-4 ultra-wideband Wilkinson power divider is presented. Initially, a 1-to-2 divider was designed and optimized for the full 3.1 GHz to 10.6 GHz range. The 1-to-4 divider was realized using three 1 to 2 dividers, and further optimized for full band insertion loss, return loss, and isolation. The circuits were constructed using a 0.75mm thick Rogers RO3035 substrate, and experimentally validated.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"16 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":"116206001","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.2016.7807592
M. Benamara, M. Grzeskowiak, G. Lissorgues, A. Diet, Y. Le Bihan, C. Conessa
In this article, HF RFID reader antenna including small resonant coil, operating with the magnetic coupling with the reader coil, is reported. The proposed system is used to improve surface and volume of small tag detection. The performances of such system are validated by maximization of input impedance (load modulation principle) and equivalent mutual inductance between the reader dual-coils and the tag coil compared to a conventional RFID reader antenna. Analytical formulas of theses parameters are developed. The proposed system is validated by detection measurements in parallel and perpendicular configurations between the reader and the tag coils.
{"title":"Reader antenna including resonators for HF RFID detection","authors":"M. Benamara, M. Grzeskowiak, G. Lissorgues, A. Diet, Y. Le Bihan, C. Conessa","doi":"10.1109/LAPC.2016.7807592","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807592","url":null,"abstract":"In this article, HF RFID reader antenna including small resonant coil, operating with the magnetic coupling with the reader coil, is reported. The proposed system is used to improve surface and volume of small tag detection. The performances of such system are validated by maximization of input impedance (load modulation principle) and equivalent mutual inductance between the reader dual-coils and the tag coil compared to a conventional RFID reader antenna. Analytical formulas of theses parameters are developed. The proposed system is validated by detection measurements in parallel and perpendicular configurations between the reader and the tag coils.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"110 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":"131175224","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.2016.7807541
M. Frongillo, G. Riccio, G. Gennarelli
High-frequency closed form solutions are here presented for computing the electromagnetic field propagating in the presence of two co-planar adjacent blocks, which consist of metallic and dielectric (wood, concrete, etc.) materials. The field strength in and around the structure is obtained by considering the geometrical optics and diffraction propagation mechanisms. The uniform asymptotic physical optics approach is used for determining the diffraction contributions due to the involved 90° wedges. The resulting analytical solutions contain the transition function of the uniform theory of diffraction and the Fresnel reflection/transmission coefficients at the interfaces. They are easy to handle and compute, and their efficacy is tested via numerical simulations.
{"title":"Plane wave diffraction by co-planar adjacent blocks","authors":"M. Frongillo, G. Riccio, G. Gennarelli","doi":"10.1109/LAPC.2016.7807541","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807541","url":null,"abstract":"High-frequency closed form solutions are here presented for computing the electromagnetic field propagating in the presence of two co-planar adjacent blocks, which consist of metallic and dielectric (wood, concrete, etc.) materials. The field strength in and around the structure is obtained by considering the geometrical optics and diffraction propagation mechanisms. The uniform asymptotic physical optics approach is used for determining the diffraction contributions due to the involved 90° wedges. The resulting analytical solutions contain the transition function of the uniform theory of diffraction and the Fresnel reflection/transmission coefficients at the interfaces. They are easy to handle and compute, and their efficacy is tested via numerical simulations.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"32 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":"126993715","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.2016.7807543
B. Roy, A. Bhattacharya, R. Karmakar, S. Chowdhury, Ashish Bhattacharjee
A Compact Wideband Monopole Antenna, designed for wireless applications has been investigated in this paper. The antenna consists of a Radiating Patch along with a Defected Ground Plane. The proposed antenna has been compared with a similar Radiating Patch without any Defected Ground Structure (DGS) and the results have been discussed with comparison plots. The proposed antenna covers a frequency range of 2.4 GHz to 6.0 GHz with an impedance bandwidth about 85.71 %. The proposed antenna finds its application in IEEE 502.11a WLAN band (5.15-5.85 GHz), IEEE 502.11b WLAN band (2.4-2.5 GHz) and IEEE 802.16 WiMAX band (3.2-3.5 GHz).
{"title":"A compact wideband monopole antenna designed for wireless applications","authors":"B. Roy, A. Bhattacharya, R. Karmakar, S. Chowdhury, Ashish Bhattacharjee","doi":"10.1109/LAPC.2016.7807543","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807543","url":null,"abstract":"A Compact Wideband Monopole Antenna, designed for wireless applications has been investigated in this paper. The antenna consists of a Radiating Patch along with a Defected Ground Plane. The proposed antenna has been compared with a similar Radiating Patch without any Defected Ground Structure (DGS) and the results have been discussed with comparison plots. The proposed antenna covers a frequency range of 2.4 GHz to 6.0 GHz with an impedance bandwidth about 85.71 %. The proposed antenna finds its application in IEEE 502.11a WLAN band (5.15-5.85 GHz), IEEE 502.11b WLAN band (2.4-2.5 GHz) and IEEE 802.16 WiMAX band (3.2-3.5 GHz).","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"67 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":"134164983","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.2016.7807481
A. Grossetete, E. Fourn, R. Gillard
This paper presents a method for synthesizing the equivalent circuit of a single-layer reflect array unit-cell based on filter synthesis techniques. Metallic-ring and slot-ring cells are synthesized respectively by 3rd-order band-stop and band-pass Tchebycheff filters. A phase range of 360° at 12.5 GHz is achieved with an maximum average phase error of 16° for a phase dispersion of 60°/GHz in the band of interest 10.5-14.5 GHz.
{"title":"Single-layer reflectarray cell synthesis based on filter synthesis techniques","authors":"A. Grossetete, E. Fourn, R. Gillard","doi":"10.1109/LAPC.2016.7807481","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807481","url":null,"abstract":"This paper presents a method for synthesizing the equivalent circuit of a single-layer reflect array unit-cell based on filter synthesis techniques. Metallic-ring and slot-ring cells are synthesized respectively by 3rd-order band-stop and band-pass Tchebycheff filters. A phase range of 360° at 12.5 GHz is achieved with an maximum average phase error of 16° for a phase dispersion of 60°/GHz in the band of interest 10.5-14.5 GHz.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"144 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":"134326621","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.2016.7807483
Mathias Tømmer, K. G. Kjelgård, T. S. Lande
In this paper a planar body coupled wideband monopole antenna for medical imaging and sensing applications is presented. With a dielectric spacer between the monopole and body, a high degree of body coupling and low matching sensitivity is achieved. The antenna is a staircase monopole with a -10dB reflection bandwidth of 2.5-7 GHz measured on the forehead, breast bone and calf muscle. Antenna size is only 20×20 mm. Measurements of the antenna coupled to the body surface indicate significant improvements using a low-loss dielectric spacer with permittivity matching the body. The wide bandwidth, high body coupling and low sensitivity to varying body dielectric properties makes this antenna a suitable candidate for microwave medical imaging and body sensing applications.
{"title":"Body coupled wideband monopole antenna","authors":"Mathias Tømmer, K. G. Kjelgård, T. S. Lande","doi":"10.1109/LAPC.2016.7807483","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807483","url":null,"abstract":"In this paper a planar body coupled wideband monopole antenna for medical imaging and sensing applications is presented. With a dielectric spacer between the monopole and body, a high degree of body coupling and low matching sensitivity is achieved. The antenna is a staircase monopole with a -10dB reflection bandwidth of 2.5-7 GHz measured on the forehead, breast bone and calf muscle. Antenna size is only 20×20 mm. Measurements of the antenna coupled to the body surface indicate significant improvements using a low-loss dielectric spacer with permittivity matching the body. The wide bandwidth, high body coupling and low sensitivity to varying body dielectric properties makes this antenna a suitable candidate for microwave medical imaging and body sensing applications.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"1028 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":"113995229","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.2016.7807515
M. Bashri, T. Arslan, W. Zhou, N. Haridas
In this paper, a compact and lightweight RF switching system for wearable microwave imaging device is proposed. The switching system provides wideband performance which covers frequency ranges from DC to 8GHz. A low power microcontroller is integrated with the switch to act as a control unit. By using Bluetooth connection, the switching system can be controlled using an Android mobile phone. An array of eight UWB monopole antennae were connected to the proposed system and its overall performance was evaluated. The measured insertion losses of each of the port show an average loss of 2.14dB at 2GHz. As for the impedance matching of the antennae, the measured return loss values are all below −10dB from 1.5GHz to 4GHz. The size of the circuit is 50 mm × 50mm × 15mm.
{"title":"A compact RF switching system for wearable microwave imaging","authors":"M. Bashri, T. Arslan, W. Zhou, N. Haridas","doi":"10.1109/LAPC.2016.7807515","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807515","url":null,"abstract":"In this paper, a compact and lightweight RF switching system for wearable microwave imaging device is proposed. The switching system provides wideband performance which covers frequency ranges from DC to 8GHz. A low power microcontroller is integrated with the switch to act as a control unit. By using Bluetooth connection, the switching system can be controlled using an Android mobile phone. An array of eight UWB monopole antennae were connected to the proposed system and its overall performance was evaluated. The measured insertion losses of each of the port show an average loss of 2.14dB at 2GHz. As for the impedance matching of the antennae, the measured return loss values are all below −10dB from 1.5GHz to 4GHz. The size of the circuit is 50 mm × 50mm × 15mm.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"19 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":"114331452","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.2016.7807563
F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi
This communication concerns the experimental validation of a probe compensated near-field - far-field (NF-FF) transformation technique with bi-polar scanning for quasi-planar antennas requiring a minimum number of NF data. Such a technique properly exploits the nonredundant sampling representations of the electromagnetic fields to obtain an efficient representation of the voltage measured by the probe on the scanning plane in terms of the bi-polar NF samples. A double bowl, i.e. a surface formed by two circular bowls with the same aperture diameter, but eventually different lateral bends, is adopted to model the quasi-planar antenna under test. An optimal sampling interpolation formula is applied to reconstruct, in an efficient and accurate way, the NF data required by the classical plane-rectangular NF-FF transformation from the collected bi-polar ones. Thus, a remarkable reduction in the number of the NF data to be acquired and related acquisition time is gained. Some results of experimental tests, carried out at the Antenna Characterization Lab of the University of Salerno and assessing the effectiveness of the presented technique, are shown.
{"title":"Laboratory tests on a NF-FF transformation technique from nonredundant bi-polar data","authors":"F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi","doi":"10.1109/LAPC.2016.7807563","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807563","url":null,"abstract":"This communication concerns the experimental validation of a probe compensated near-field - far-field (NF-FF) transformation technique with bi-polar scanning for quasi-planar antennas requiring a minimum number of NF data. Such a technique properly exploits the nonredundant sampling representations of the electromagnetic fields to obtain an efficient representation of the voltage measured by the probe on the scanning plane in terms of the bi-polar NF samples. A double bowl, i.e. a surface formed by two circular bowls with the same aperture diameter, but eventually different lateral bends, is adopted to model the quasi-planar antenna under test. An optimal sampling interpolation formula is applied to reconstruct, in an efficient and accurate way, the NF data required by the classical plane-rectangular NF-FF transformation from the collected bi-polar ones. Thus, a remarkable reduction in the number of the NF data to be acquired and related acquisition time is gained. Some results of experimental tests, carried out at the Antenna Characterization Lab of the University of Salerno and assessing the effectiveness of the presented technique, are shown.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"66 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":"114573010","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.2016.7807609
J. Lei, Y. Hao
Quasi-conformal transformation optics (QCTO) provides a practical approach to design nonmagnetic broadband medium for electromagnetic devices, here we present a novel hybrid method of QCTO with low sidelobe array synthesis, and apply it to the conformal phased array antenna (PAA) design. Effective approximation of relative permittivity is used to avoid metamaterials with dielectric constant lower than unity during the coordinate transformation. Taking the conformal cylindrical array as example, numerical simulations are given to show how arbitrary non-uniform PAA based on all dielectric QCTO lens can scan as a uniformly spaced linear PAA with low sidelobe level (SLL), which makes the advantages of linear array such as simple array synthesis and beamforming, can be achievable by an arbitrary array with complex geometry.
{"title":"Conformal Phased array antenna with low SLL based on QCTO","authors":"J. Lei, Y. Hao","doi":"10.1109/LAPC.2016.7807609","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807609","url":null,"abstract":"Quasi-conformal transformation optics (QCTO) provides a practical approach to design nonmagnetic broadband medium for electromagnetic devices, here we present a novel hybrid method of QCTO with low sidelobe array synthesis, and apply it to the conformal phased array antenna (PAA) design. Effective approximation of relative permittivity is used to avoid metamaterials with dielectric constant lower than unity during the coordinate transformation. Taking the conformal cylindrical array as example, numerical simulations are given to show how arbitrary non-uniform PAA based on all dielectric QCTO lens can scan as a uniformly spaced linear PAA with low sidelobe level (SLL), which makes the advantages of linear array such as simple array synthesis and beamforming, can be achievable by an arbitrary array with complex geometry.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"6 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":"115269063","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.2016.7807554
Nur Hakimah Ab Aziz, Alaa H. Radhi, R. Nilavalan
This paper contemplate a theoretical analysis of a pattern reconfigurable antenna using annular slot antenna operating in low frequency. A shorting pin is inserted to allow the annular slot antenna to have an omni-directional radiation pattern like a monopole antenna. The reconfigurable antenna consists of numerous metal cylinders arranged around the annular slot antenna. By controlling pin diodes associated with the metal cylinders, the antenna is capable of working up in different directions with a maximum working beam angle of 11.25° at a frequency of 1.05 GHz.
{"title":"A reconfigurable radiation pattern annular slot antenna","authors":"Nur Hakimah Ab Aziz, Alaa H. Radhi, R. Nilavalan","doi":"10.1109/LAPC.2016.7807554","DOIUrl":"https://doi.org/10.1109/LAPC.2016.7807554","url":null,"abstract":"This paper contemplate a theoretical analysis of a pattern reconfigurable antenna using annular slot antenna operating in low frequency. A shorting pin is inserted to allow the annular slot antenna to have an omni-directional radiation pattern like a monopole antenna. The reconfigurable antenna consists of numerous metal cylinders arranged around the annular slot antenna. By controlling pin diodes associated with the metal cylinders, the antenna is capable of working up in different directions with a maximum working beam angle of 11.25° at a frequency of 1.05 GHz.","PeriodicalId":253379,"journal":{"name":"2016 Loughborough Antennas & Propagation Conference (LAPC)","volume":"2018 43","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120968051","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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