Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366055
Seera Dileep Raju, Lakhan Panwar, Haranath Bojja, M. Z. A. Khan
Ultra Wide Band Technology (UWB) is rising tremendously these years. Due to its large operating bandwidth it is best suited for applications like high data rate wireless communications, imaging systems, high accuracy radars, health-care and personal entertainment. In this paper we optimized two tetraskelion designs (Design 1 and Design 2) by varying the shape and dimensions of the notches in Design 1 and Design 2. As a result, Design 1 operates in the frequency range of 3.65 GHz to 11.03 GHz and Design 2 operates in the frequency range of 3.68 GHz to 10.69 GHz. Using High Frequency Structure Simulator the characteristics of these antennas such as bandwidth, return losses, Voltage Standing Wave Ratio (VSWR) and radiation patterns are determined.
{"title":"Optimized ultra-wide band tetraskelion-shaped slot antenna with notches","authors":"Seera Dileep Raju, Lakhan Panwar, Haranath Bojja, M. Z. A. Khan","doi":"10.1109/LAPC.2015.7366055","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366055","url":null,"abstract":"Ultra Wide Band Technology (UWB) is rising tremendously these years. Due to its large operating bandwidth it is best suited for applications like high data rate wireless communications, imaging systems, high accuracy radars, health-care and personal entertainment. In this paper we optimized two tetraskelion designs (Design 1 and Design 2) by varying the shape and dimensions of the notches in Design 1 and Design 2. As a result, Design 1 operates in the frequency range of 3.65 GHz to 11.03 GHz and Design 2 operates in the frequency range of 3.68 GHz to 10.69 GHz. Using High Frequency Structure Simulator the characteristics of these antennas such as bandwidth, return losses, Voltage Standing Wave Ratio (VSWR) and radiation patterns are determined.","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":"122585666","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.2015.7366032
Ahmed A. Naser, Khalil H. Sayidmarie, J. Aziz
The long-term evolution (LTE) standard has attracted much interest because it offers many advantages. Antenna designers for the lower band of the LTE700 band for mobile handsets have to compromise between the limited space in the handset and long wavelengths implied by frequency of operation. An antenna with meandered line-PIFA combination is proposed as a solution for the above challenge. The influences of various design parameters are investigated using the CST Microwave Studio Suite. The antenna shape was then optimized to obtain a -6dB bandwidth of (58) MHz centered at (765) MHz. The antenna offers a second band at 2.16GHz for other applications. The antenna has compact size of 65×110×1.6mm3 (0.165×0.28×0.004 wavelengths at the center frequency of the lower band).
{"title":"A meandered line-PIFA antenna for LTE (Band-Class-13) handset applications","authors":"Ahmed A. Naser, Khalil H. Sayidmarie, J. Aziz","doi":"10.1109/LAPC.2015.7366032","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366032","url":null,"abstract":"The long-term evolution (LTE) standard has attracted much interest because it offers many advantages. Antenna designers for the lower band of the LTE700 band for mobile handsets have to compromise between the limited space in the handset and long wavelengths implied by frequency of operation. An antenna with meandered line-PIFA combination is proposed as a solution for the above challenge. The influences of various design parameters are investigated using the CST Microwave Studio Suite. The antenna shape was then optimized to obtain a -6dB bandwidth of (58) MHz centered at (765) MHz. The antenna offers a second band at 2.16GHz for other applications. The antenna has compact size of 65×110×1.6mm3 (0.165×0.28×0.004 wavelengths at the center frequency of the lower band).","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"198 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":"122166657","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.2015.7365993
K. Schraml, D. Heberling
For microwave circuits and planar antennas, complex multilayer structures pose a challenge for the designer since different materials for substrates, bonding films and coating have different frequency behaviour. Furthermore, the traditional measurement techniques for the complex permittivity rely on different field distributions than those of a transmission line making it hard to account for non-isotropic materials. This paper presents a method of measuring complex propagation constant γr, eff and the effective permittivity ϵr, eff with low cost set of simple transmission lines. It uses parts of the Multiline Calibration Technique which was developed for the calibration of vector network analyzers. An implementation in MATLAB as well as a study on the performance of the algorithm using simulated lines with added noise are presented.
{"title":"Estimation of the propagation constant in multilayer microwave circuits using a low cost multiline system","authors":"K. Schraml, D. Heberling","doi":"10.1109/LAPC.2015.7365993","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7365993","url":null,"abstract":"For microwave circuits and planar antennas, complex multilayer structures pose a challenge for the designer since different materials for substrates, bonding films and coating have different frequency behaviour. Furthermore, the traditional measurement techniques for the complex permittivity rely on different field distributions than those of a transmission line making it hard to account for non-isotropic materials. This paper presents a method of measuring complex propagation constant γr, eff and the effective permittivity ϵr, eff with low cost set of simple transmission lines. It uses parts of the Multiline Calibration Technique which was developed for the calibration of vector network analyzers. An implementation in MATLAB as well as a study on the performance of the algorithm using simulated lines with added noise are presented.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"2 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":"129269660","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.2015.7366009
D. Al-Saffar, R. Edwards, S. Wen
Typically mobile handsets are used in close proximity to the users head, hand and shoulder. The radio frequency energy received and produced by the handset interacts with biological tissue causing severe perturbations to the radio channel. Human tissue is both dispersive and lossy therefore both the frequency and amplitude of any wave interacting with a user either in the uplink or the downlink will be changed. Identification of the presence of humans can be achieved by comparisons between the channel impulse response with and without a human user. This paper presents measurements and analytical framework for the determination of human presence in a cellular communication system over the air channel comprising a human, a handset and base station. For this analysis the chosen bearer is GSM.
{"title":"User detection at the base station in a GSM 900 mobile phone system","authors":"D. Al-Saffar, R. Edwards, S. Wen","doi":"10.1109/LAPC.2015.7366009","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366009","url":null,"abstract":"Typically mobile handsets are used in close proximity to the users head, hand and shoulder. The radio frequency energy received and produced by the handset interacts with biological tissue causing severe perturbations to the radio channel. Human tissue is both dispersive and lossy therefore both the frequency and amplitude of any wave interacting with a user either in the uplink or the downlink will be changed. Identification of the presence of humans can be achieved by comparisons between the channel impulse response with and without a human user. This paper presents measurements and analytical framework for the determination of human presence in a cellular communication system over the air channel comprising a human, a handset and base station. For this analysis the chosen bearer is GSM.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"84 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":"130299717","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.2015.7366011
L. Ukkonen, L. Sydanheimo, Y. Rahmat-Samii
This paper presents a review and analysis of embroidered textile antennas for wireless body-centric communication systems. Especially, the paper concentrates on recent advancements in embroidered on-body radio frequency identification (RFID) antennas and wireless brain machine interface (BMI) systems and their specific antenna and wireless power transfer challenges.
{"title":"Embroidered textile antennas for wireless body-centric communication and sensing","authors":"L. Ukkonen, L. Sydanheimo, Y. Rahmat-Samii","doi":"10.1109/LAPC.2015.7366011","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366011","url":null,"abstract":"This paper presents a review and analysis of embroidered textile antennas for wireless body-centric communication systems. Especially, the paper concentrates on recent advancements in embroidered on-body radio frequency identification (RFID) antennas and wireless brain machine interface (BMI) systems and their specific antenna and wireless power transfer challenges.","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":"129109172","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.2015.7366017
S. Casu, A. Fanti, V. Floris, G. Gatto, G. Mazzarella, M. Migliore, I. Spano
In this paper we evaluate the effects of UHF electromagnetic fields (in different configurations) on a blood bag, to show that the effects are small enough to support the use of UHF RFID also in the blood transfusion supply chain.
{"title":"Evaluation of the effects of UHF electromagnetic fields on a blood bag","authors":"S. Casu, A. Fanti, V. Floris, G. Gatto, G. Mazzarella, M. Migliore, I. Spano","doi":"10.1109/LAPC.2015.7366017","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366017","url":null,"abstract":"In this paper we evaluate the effects of UHF electromagnetic fields (in different configurations) on a blood bag, to show that the effects are small enough to support the use of UHF RFID also in the blood transfusion supply chain.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"9 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":"127621731","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.2015.7366030
P. Callaghan, R. Huelin, M. H. Sagor
A simple Double-Layer Grid plane wave filter structure is proposed that can provide multiple transmission bands for cellular phone frequencies but with a reflection band for WLAN signals. The approach offers ease of construction making it applicable to building applications. A parametric study using simulation supported by simple experimental data investigates the proposed, novel design.
{"title":"Double-layer grid filter for control of wireless signal propagation within buildings","authors":"P. Callaghan, R. Huelin, M. H. Sagor","doi":"10.1109/LAPC.2015.7366030","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366030","url":null,"abstract":"A simple Double-Layer Grid plane wave filter structure is proposed that can provide multiple transmission bands for cellular phone frequencies but with a reflection band for WLAN signals. The approach offers ease of construction making it applicable to building applications. A parametric study using simulation supported by simple experimental data investigates the proposed, novel design.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"14 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":"134280058","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.2015.7366137
M. Khosronejad, G. Gentili
In recent years, various research works have been carried out in the UHF partial discharge monitoring of power transformers. The proper design of decoupling UHF sensors is very important in this application. This paper presents a two-arm Archimedean spiral antenna with a ground plane and a double sided parallel feeding network as a sensor for the mentioned application. Due to some existing limitations in this context, the antenna design process is somewhat unique as compared to previous works in the general telecommunication area. The measured `10 dB' return loss bandwidth is more than 3.8 GHz starting from 220 MHz. Finally, simulations and measurements results demonstrate the successful principle of operation of the proposed antenna.
{"title":"Design of an Archimedean spiral UHF antenna for pulse monitoring application","authors":"M. Khosronejad, G. Gentili","doi":"10.1109/LAPC.2015.7366137","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366137","url":null,"abstract":"In recent years, various research works have been carried out in the UHF partial discharge monitoring of power transformers. The proper design of decoupling UHF sensors is very important in this application. This paper presents a two-arm Archimedean spiral antenna with a ground plane and a double sided parallel feeding network as a sensor for the mentioned application. Due to some existing limitations in this context, the antenna design process is somewhat unique as compared to previous works in the general telecommunication area. The measured `10 dB' return loss bandwidth is more than 3.8 GHz starting from 220 MHz. Finally, simulations and measurements results demonstrate the successful principle of operation of the proposed antenna.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"13 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":"134321389","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.2015.7366144
Simon Muller, A. Diewald
Several methods to de-embed high-frequency two-port networks are figured out. In a first step, the scattering matrix S of a coaxial connector is determined. After the explanation of the measurement technique, two different methods of extracting the S parameter matrix will be presented and compared. Further objective of this elaboration is the comparison of the measured frequency responses of Rosenberger K and SMA connectors at frequencies up to 40 GHz. The ascertained data are essential for the possibility of replacing cost-intensive connectors by SMA, being an interesting option for growth sectors in radar technology such as automotive suppliers.
{"title":"Methods of connector S-parameter extraction depending on broadband measurements of symmetrical structures","authors":"Simon Muller, A. Diewald","doi":"10.1109/LAPC.2015.7366144","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366144","url":null,"abstract":"Several methods to de-embed high-frequency two-port networks are figured out. In a first step, the scattering matrix S of a coaxial connector is determined. After the explanation of the measurement technique, two different methods of extracting the S parameter matrix will be presented and compared. Further objective of this elaboration is the comparison of the measured frequency responses of Rosenberger K and SMA connectors at frequencies up to 40 GHz. The ascertained data are essential for the possibility of replacing cost-intensive connectors by SMA, being an interesting option for growth sectors in radar technology such as automotive suppliers.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"70 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":"131402151","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.2015.7366008
R. Shubair, Amna M. AlShamsi, K. Khalaf, A. Kiourti
This paper presents two innovative designs of miniature wearable microstrip antennas for biotelemetry in the Industrial, Scientific, and Medical (ISM) band (2.4-2.48GHz). The two proposed designs employ stacked triangular guiding patches as well as slotting of the patches. This results in a considerable size reduction of 60% with respect to the original antenna volume. Both designs have dimensions of of 39 × 39 × 2.1 mm3. Simulations of the two proposed designs have been carried out using HFSS for S-parameters, Specific Absorption Rate (SAR), and E-field distribution, on an equivalent human body phantom. Results demonstrate a return loss of -16.69 dB, and -15.53 dB for the stacked and stacked-slotted triangular patches, respectively. Furthermore, the maximum SAR value obtained from both designs satisfy the IEEE standard safety guidelines, which is necessary for ensuring patient safety. This makes the two proposed antenna designs great candidates for WBAN applications.
{"title":"Novel miniature wearable microstrip antennas for ISM-band biomedical telemetry","authors":"R. Shubair, Amna M. AlShamsi, K. Khalaf, A. Kiourti","doi":"10.1109/LAPC.2015.7366008","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366008","url":null,"abstract":"This paper presents two innovative designs of miniature wearable microstrip antennas for biotelemetry in the Industrial, Scientific, and Medical (ISM) band (2.4-2.48GHz). The two proposed designs employ stacked triangular guiding patches as well as slotting of the patches. This results in a considerable size reduction of 60% with respect to the original antenna volume. Both designs have dimensions of of 39 × 39 × 2.1 mm3. Simulations of the two proposed designs have been carried out using HFSS for S-parameters, Specific Absorption Rate (SAR), and E-field distribution, on an equivalent human body phantom. Results demonstrate a return loss of -16.69 dB, and -15.53 dB for the stacked and stacked-slotted triangular patches, respectively. Furthermore, the maximum SAR value obtained from both designs satisfy the IEEE standard safety guidelines, which is necessary for ensuring patient safety. This makes the two proposed antenna designs great candidates for WBAN applications.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"32 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":"116988587","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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