Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366014
R. Shubair, Hadeel Elayan
The emerging in vivo communication and networking system is a prospective component in advancing health care delivery and empowering the development of new applications and services. In vivo communications construct wirelessly networked cyber-physical systems of embedded devices to allow rapid, correct and cost-effective responses under various conditions. This paper surveys the existing research which investigates the state of art of the in vivo communication. It also focuses on characterizing and modeling the in vivo wireless channel and contrasting this channel with the other familiar channels. MIMO in vivo is as well regarded in this overview since it significantly enhances the performance gain and data rates. Furthermore, this paper addresses current challenges and future research areas for in vivo communications.
{"title":"In vivo wireless body communications: State-of-the-art and future directions","authors":"R. Shubair, Hadeel Elayan","doi":"10.1109/LAPC.2015.7366014","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366014","url":null,"abstract":"The emerging in vivo communication and networking system is a prospective component in advancing health care delivery and empowering the development of new applications and services. In vivo communications construct wirelessly networked cyber-physical systems of embedded devices to allow rapid, correct and cost-effective responses under various conditions. This paper surveys the existing research which investigates the state of art of the in vivo communication. It also focuses on characterizing and modeling the in vivo wireless channel and contrasting this channel with the other familiar channels. MIMO in vivo is as well regarded in this overview since it significantly enhances the performance gain and data rates. Furthermore, this paper addresses current challenges and future research areas for in vivo communications.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130293135","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366064
N. P. B. Kammersgaard, S. Kvist, J. Thaysen, K. Jakobsen
An in-the-ear antenna is rotated in the concha. For the different placements the ear-to-ear path gain is simulated and measured. The simulations and measurements show that the ear-to-ear path gain varies with more than 15 dB even though it is the same antenna that occupies the same volume, which has only been rotated. This illustrates the importance of the correct placement of the antenna. The variation of the ear-to-ear path gain is compared with the far-field efficiency in order to explain part of the variation. The best and worst placements' radiation patterns are analyzed.
{"title":"Impact of placement of in-the-ear antenna on ear-to-ear path gain","authors":"N. P. B. Kammersgaard, S. Kvist, J. Thaysen, K. Jakobsen","doi":"10.1109/LAPC.2015.7366064","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366064","url":null,"abstract":"An in-the-ear antenna is rotated in the concha. For the different placements the ear-to-ear path gain is simulated and measured. The simulations and measurements show that the ear-to-ear path gain varies with more than 15 dB even though it is the same antenna that occupies the same volume, which has only been rotated. This illustrates the importance of the correct placement of the antenna. The variation of the ear-to-ear path gain is compared with the far-field efficiency in order to explain part of the variation. The best and worst placements' radiation patterns are analyzed.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130402737","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366051
M. Ahmad, M. Amin, T. Malik, M. B. Akhtar, A. Khan, A. Akbar
In this work, input characteristics of Quadrifilar Helix Antenna (QHA) are investigated for variations in height in the presence of finite metallic structures of varying sizes. It is noticed that the input characteristics such as conductance, susceptance and reflection coefficient are affected as height of QHA above these finite metallic ground planes varies. Rapid variations are observed if QHA is placed below 0.2 λ above ground plane. Conductance, susceptance and reflection coefficient of input feed point are inversely proportional to the distance between QHA and ground plane. If the height of QHA is greater than 0.2 λ above ground plane, these parameters are relatively insensitive with respect to changes in height. Larger sizes of ground planes severely affect conductance and susceptance while the effects of smaller sizes of ground planes on input reflection coefficient are significant. Deployment above 0.2 λ at decks of LEO satellites, aerial drones and handheld mobile devices results in stable input characteristics of QHA that eventually conclude to better performance.
{"title":"Variations in input characteristics of Quadrifilar Helix Antenna due to finite metallic plain structures","authors":"M. Ahmad, M. Amin, T. Malik, M. B. Akhtar, A. Khan, A. Akbar","doi":"10.1109/LAPC.2015.7366051","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366051","url":null,"abstract":"In this work, input characteristics of Quadrifilar Helix Antenna (QHA) are investigated for variations in height in the presence of finite metallic structures of varying sizes. It is noticed that the input characteristics such as conductance, susceptance and reflection coefficient are affected as height of QHA above these finite metallic ground planes varies. Rapid variations are observed if QHA is placed below 0.2 λ above ground plane. Conductance, susceptance and reflection coefficient of input feed point are inversely proportional to the distance between QHA and ground plane. If the height of QHA is greater than 0.2 λ above ground plane, these parameters are relatively insensitive with respect to changes in height. Larger sizes of ground planes severely affect conductance and susceptance while the effects of smaller sizes of ground planes on input reflection coefficient are significant. Deployment above 0.2 λ at decks of LEO satellites, aerial drones and handheld mobile devices results in stable input characteristics of QHA that eventually conclude to better performance.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130408614","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366072
A. R. Chandran, Senan Morris, N. Timmons, J. Morrison
A new reconfigurable low profile microstrip patch antenna with switchable propagating modes for wireless body area network is presented. The directivity gain of the antenna is 6.8 dBi in the off-body mode, and 6.4 dBi in the on-body mode. The prototype covers the ISM 2.45 GHz band. The operating frequency of the antenna remains the same irrespective of the direction to which the beam is steered.
{"title":"Antenna with switchable propagating modes for WBAN applications","authors":"A. R. Chandran, Senan Morris, N. Timmons, J. Morrison","doi":"10.1109/LAPC.2015.7366072","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366072","url":null,"abstract":"A new reconfigurable low profile microstrip patch antenna with switchable propagating modes for wireless body area network is presented. The directivity gain of the antenna is 6.8 dBi in the off-body mode, and 6.4 dBi in the on-body mode. The prototype covers the ISM 2.45 GHz band. The operating frequency of the antenna remains the same irrespective of the direction to which the beam is steered.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128341001","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366106
C. Parini, R. Dubrovka, S. Gregson
This paper presents the results of a recent computational electromagnetic (CEM) simulation campaign for a single offset reflector CATR, where a number of models employing different field propagation methods were compared and contrasted both qualitatively and quantitatively using objective, non-local statistical image classification techniques.
{"title":"Compact range quiet zone modelling: Quantitative assessment using a variety of electromagnetic simulation methods","authors":"C. Parini, R. Dubrovka, S. Gregson","doi":"10.1109/LAPC.2015.7366106","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366106","url":null,"abstract":"This paper presents the results of a recent computational electromagnetic (CEM) simulation campaign for a single offset reflector CATR, where a number of models employing different field propagation methods were compared and contrasted both qualitatively and quantitatively using objective, non-local statistical image classification techniques.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130587282","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366044
J. Verhaevert, P. Van Torre
This paper describes a low-cost transmitting and receiving system for wireless communication. In a first part, the design and realization of a transmitter for modulated data at 2.45 GHz carrier frequency and with frequency, amplitude and phase modulation is handled. A second part explains the design and realization of a receiving module, which filters and downconverts the signals to an intermediate frequency. The postprocessing section describes the use of a DVB-T module together with open-source software, SDR#, for the final downconversion, as well as for the demodulation and the detection of the received signals in order to reproduce the originally transmitted data. Combining all components results in a low-cost and flexible software defined radio system.
{"title":"Design and realization of a 2.45 GHz transmitter and receiver as a modular unit for a MIMO SDR","authors":"J. Verhaevert, P. Van Torre","doi":"10.1109/LAPC.2015.7366044","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366044","url":null,"abstract":"This paper describes a low-cost transmitting and receiving system for wireless communication. In a first part, the design and realization of a transmitter for modulated data at 2.45 GHz carrier frequency and with frequency, amplitude and phase modulation is handled. A second part explains the design and realization of a receiving module, which filters and downconverts the signals to an intermediate frequency. The postprocessing section describes the use of a DVB-T module together with open-source software, SDR#, for the final downconversion, as well as for the demodulation and the detection of the received signals in order to reproduce the originally transmitted data. Combining all components results in a low-cost and flexible software defined radio system.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117150111","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366015
M. Elsalamouny, R. Shubair
This paper proposes two novel compact designs of low-profile multi-band microstrip antennas. The first one can operate in ISM bands (2.4 GHz and 5.8 GHz), which makes it suitable for Wireless Body Area Network (WBAN) medical applications. On the other hand, the second design implements stacking of antenna such that the resulting novel design operates optimally at 3.5GHz and 7.5GHz, which makes it suitable for Ultra-Wide-Band (UWB) applications. The two antenna designs are compact in size, that is, the overall size of the first antenna is only 11.54 mm3, whereas the second is 25.16 mm3. The two antenna designs are simulated on skin radiation box, in order to allow more accurate prediction of the antenna performance when used in medical implantable devices. Apart from the compact size, both antenna designs produce a minimum Specific Absorption Rate (SAR) which complies with IEEE standard safety guidelines, which is necessary for protecting patients from electromagnetic damage.
{"title":"Novel design of compact low-profile multi-band microstrip antennas for medical applications","authors":"M. Elsalamouny, R. Shubair","doi":"10.1109/LAPC.2015.7366015","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366015","url":null,"abstract":"This paper proposes two novel compact designs of low-profile multi-band microstrip antennas. The first one can operate in ISM bands (2.4 GHz and 5.8 GHz), which makes it suitable for Wireless Body Area Network (WBAN) medical applications. On the other hand, the second design implements stacking of antenna such that the resulting novel design operates optimally at 3.5GHz and 7.5GHz, which makes it suitable for Ultra-Wide-Band (UWB) applications. The two antenna designs are compact in size, that is, the overall size of the first antenna is only 11.54 mm3, whereas the second is 25.16 mm3. The two antenna designs are simulated on skin radiation box, in order to allow more accurate prediction of the antenna performance when used in medical implantable devices. Apart from the compact size, both antenna designs produce a minimum Specific Absorption Rate (SAR) which complies with IEEE standard safety guidelines, which is necessary for protecting patients from electromagnetic damage.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"52 7-8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120914954","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366089
Adam Marcinkiw, Q. Bai, A. Tennant, F. Smith
A method of modelling creeping waves on PEC cylinders when illuminated by a perpendicular plane wave is discussed. The limitations of this technique will be considered, and an alternative method will be suggested for use with higher frequencies, and for the purposes of computing propagation constants.
{"title":"Simulation of creeping waves on PEC cylinders and discussion of propagation constants","authors":"Adam Marcinkiw, Q. Bai, A. Tennant, F. Smith","doi":"10.1109/LAPC.2015.7366089","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366089","url":null,"abstract":"A method of modelling creeping waves on PEC cylinders when illuminated by a perpendicular plane wave is discussed. The limitations of this technique will be considered, and an alternative method will be suggested for use with higher frequencies, and for the purposes of computing propagation constants.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123520579","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366054
F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi
A technique to effectively compensate known positioning errors in a near field - far field (NF-FF) transformation with plane-polar scanning, requiring a minimum number of NF data and adopting an oblate ellipsoid to model the antenna under test, is proposed. It makes use of an iterative scheme to recover the probe voltage samples at the points fixed by the nonredundant sampling representation from the collected irregularly spaced ones. The NF data needed by the classical NF-FF transformation with plane-rectangular scan are then efficiently evaluated via a two-dimensional optimal sampling interpolation formula. Experimental tests, performed at the UNISA Antenna Characterization Lab and assessing its effectiveness, are reported.
{"title":"An efficient iterative procedure to correct the positioning errors in the plane-polar scanning","authors":"F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi","doi":"10.1109/LAPC.2015.7366054","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366054","url":null,"abstract":"A technique to effectively compensate known positioning errors in a near field - far field (NF-FF) transformation with plane-polar scanning, requiring a minimum number of NF data and adopting an oblate ellipsoid to model the antenna under test, is proposed. It makes use of an iterative scheme to recover the probe voltage samples at the points fixed by the nonredundant sampling representation from the collected irregularly spaced ones. The NF data needed by the classical NF-FF transformation with plane-rectangular scan are then efficiently evaluated via a two-dimensional optimal sampling interpolation formula. Experimental tests, performed at the UNISA Antenna Characterization Lab and assessing its effectiveness, are reported.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123586724","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 : 2015-11-01DOI: 10.1109/LAPC.2015.7366100
S. Jun, B. Sanz-Izquierdo, M. Summerfield
An ultra-wideband (UWB) monopole antenna on an additive manufactured (AM) flexible substrate for foot wear application is proposed. The 3D printing of foot phantoms for the testing of this type of antennas is also introduced. Inexpensive fuse filament fabrication (FFF) technology is utilized for these developments. Flexible polylactic acid plastic filament (PLA) material is used for the antenna while transparent PLA for the phantom. The antenna is intended for integration into the footwear tongue. The UWB monopole antenna achieves -10dB input impedance matching from 3.1GHz to over 10.6GHz in freespace, on the foot phantom and on the real human body. Simulation and measurement confirm the ultra-wideband operation of the antenna.
{"title":"UWB antenna on 3D printed flexible substrate and foot phantom","authors":"S. Jun, B. Sanz-Izquierdo, M. Summerfield","doi":"10.1109/LAPC.2015.7366100","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366100","url":null,"abstract":"An ultra-wideband (UWB) monopole antenna on an additive manufactured (AM) flexible substrate for foot wear application is proposed. The 3D printing of foot phantoms for the testing of this type of antennas is also introduced. Inexpensive fuse filament fabrication (FFF) technology is utilized for these developments. Flexible polylactic acid plastic filament (PLA) material is used for the antenna while transparent PLA for the phantom. The antenna is intended for integration into the footwear tongue. The UWB monopole antenna achieves -10dB input impedance matching from 3.1GHz to over 10.6GHz in freespace, on the foot phantom and on the real human body. Simulation and measurement confirm the ultra-wideband operation of the antenna.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123137993","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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