Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366065
Z. Talepour, S. Esmaili, A. Khaleghi
A slot array antenna is designed using ridge gap waveguide technology in two sub arrays. Each sub array is fed through a power divider which is designed on a separate ridge- groove gap waveguide. The coupling between two gap waveguides is conducted using coaxial transmission lines. The power divider of ridge-groove gap is fed using coaxial line that can provide a bandwidth of 22% at 14 GHz. The integrated antenna operates within the frequency range of 13.5-15.6 GHz with a gain of 13.9-15.5 dB. Design of the transmission line, power divider and sub-array antenna is presented.
{"title":"Ridge gap waveguide antenna array using integrated coaxial power divider","authors":"Z. Talepour, S. Esmaili, A. Khaleghi","doi":"10.1109/LAPC.2015.7366065","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366065","url":null,"abstract":"A slot array antenna is designed using ridge gap waveguide technology in two sub arrays. Each sub array is fed through a power divider which is designed on a separate ridge- groove gap waveguide. The coupling between two gap waveguides is conducted using coaxial transmission lines. The power divider of ridge-groove gap is fed using coaxial line that can provide a bandwidth of 22% at 14 GHz. The integrated antenna operates within the frequency range of 13.5-15.6 GHz with a gain of 13.9-15.5 dB. Design of the transmission line, power divider and sub-array antenna is presented.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"16 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":"124701051","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.2015.7366007
P. Alizadeh, C. Parini, K. Rajab
In this paper, a 24 GHz to 33 GHz frequency-modulated continuous-wave radar (FMCW) system is proposed. Beginning in the range of 2 GHz to 2.7 GHz, three separate multiplication stages bring the frequency band to between 24 GHz and 33 GHz. The system is integrated with a set of planar Yagi antennas. A single planar Yagi antenna is included on the transmit side, while four antennas in a steerable uniform linear array (ULA) are placed at the receive side to increase the angular resolution. The expected output power is +12 dBm across the full 9 GHz bandwidth. Later work will allow this system to be used as a synthetic aperture radar (SAR) system.
{"title":"A low-cost FMCW radar front end for imaging at 24 GHz to 33 GHz","authors":"P. Alizadeh, C. Parini, K. Rajab","doi":"10.1109/LAPC.2015.7366007","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366007","url":null,"abstract":"In this paper, a 24 GHz to 33 GHz frequency-modulated continuous-wave radar (FMCW) system is proposed. Beginning in the range of 2 GHz to 2.7 GHz, three separate multiplication stages bring the frequency band to between 24 GHz and 33 GHz. The system is integrated with a set of planar Yagi antennas. A single planar Yagi antenna is included on the transmit side, while four antennas in a steerable uniform linear array (ULA) are placed at the receive side to increase the angular resolution. The expected output power is +12 dBm across the full 9 GHz bandwidth. Later work will allow this system to be used as a synthetic aperture radar (SAR) system.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"23 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":"126107452","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.2015.7366026
A. Krishna, T. Khattab, A. Abdelaziz, M. Guizani
In this paper, the field uniformity of axial electric field component inside an anisotropic jet engine environment is analyzed by using Ansys HFSS simulation tool. The standard deviation based approach is used for the analysis of uniformity in jet engine. Using full wave simulation analysis, the electric field values are extracted from the jet engine containing one set of 24 blades. Moreover, the effect of position of transmitting antennas on field uniformity is analyzed by using two different transmitting antenna positions. Furthermore, the effect of number of rotating blades on the field uniformity is also analyzed. Finally, distribution of standard deviation of electric field with respect to the dimension of jet engine is performed.
{"title":"On the study of field uniformity inside jet engines","authors":"A. Krishna, T. Khattab, A. Abdelaziz, M. Guizani","doi":"10.1109/LAPC.2015.7366026","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366026","url":null,"abstract":"In this paper, the field uniformity of axial electric field component inside an anisotropic jet engine environment is analyzed by using Ansys HFSS simulation tool. The standard deviation based approach is used for the analysis of uniformity in jet engine. Using full wave simulation analysis, the electric field values are extracted from the jet engine containing one set of 24 blades. Moreover, the effect of position of transmitting antennas on field uniformity is analyzed by using two different transmitting antenna positions. Furthermore, the effect of number of rotating blades on the field uniformity is also analyzed. Finally, distribution of standard deviation of electric field with respect to the dimension of jet engine is performed.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"121 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":"116019822","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.2015.7366052
A. Loutridis, Kansheng Yang, M. John, M. Ammann
A dual band antenna for machine-to-machine applications in ISM and GSM bands is presented. The antenna is compact and operates at 409-442 MHz and 800-1224 MHz, with good efficiency and gain across the frequency bands. A parametric investigation of key geometrical parameters is reported.
{"title":"Dual band printed antenna for M2M applications in ISM and GSM bands","authors":"A. Loutridis, Kansheng Yang, M. John, M. Ammann","doi":"10.1109/LAPC.2015.7366052","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366052","url":null,"abstract":"A dual band antenna for machine-to-machine applications in ISM and GSM bands is presented. The antenna is compact and operates at 409-442 MHz and 800-1224 MHz, with good efficiency and gain across the frequency bands. A parametric investigation of key geometrical parameters is reported.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"42 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132703910","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.2015.7366108
I. Hindmarch, M. Beach, A. Nix, P. Thomas
Geolocation of wireless emitters using Received Signal Strength Difference (RSSD) and site-specific propagation models offers the advantages of increased accuracy and operation with non-cooperative emitters (where emitted power level or positional information such as GPS from the emitter is unavailable) over more commonplace Received Signal Strength (RSS) systems. An important factor influencing the accuracy of such systems is the physical arrangement of the sensors, making optimising the layout of sensors prior to deployment highly desirable. This paper introduces the novel Uniqueness metric for evaluating receiver layouts based on inter-point RSSD with a site-specific propagation model. Two optimization techniques (Monte Carlo optimization and an implementation of a genetic algorithm) are applied to the metric and evaluated in a case study that incorporates two different propagation environments (urban and rural) compared against an existing dilution of precision based metric. The results of the simulation demonstrate that the uniqueness metric combined with the genetic algorithm provide the best overall performance in both environments tested.
{"title":"Optimising sensor placement for site-specific RSSD geolocation systems","authors":"I. Hindmarch, M. Beach, A. Nix, P. Thomas","doi":"10.1109/LAPC.2015.7366108","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366108","url":null,"abstract":"Geolocation of wireless emitters using Received Signal Strength Difference (RSSD) and site-specific propagation models offers the advantages of increased accuracy and operation with non-cooperative emitters (where emitted power level or positional information such as GPS from the emitter is unavailable) over more commonplace Received Signal Strength (RSS) systems. An important factor influencing the accuracy of such systems is the physical arrangement of the sensors, making optimising the layout of sensors prior to deployment highly desirable. This paper introduces the novel Uniqueness metric for evaluating receiver layouts based on inter-point RSSD with a site-specific propagation model. Two optimization techniques (Monte Carlo optimization and an implementation of a genetic algorithm) are applied to the metric and evaluated in a case study that incorporates two different propagation environments (urban and rural) compared against an existing dilution of precision based metric. The results of the simulation demonstrate that the uniqueness metric combined with the genetic algorithm provide the best overall performance in both environments tested.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"95 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":"128589928","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.2015.7365994
W. Wei, K. Mahdjoubi, C. Brousseau, A. Sharaiha, O. Emile
We present a novel horn antenna to generate radio waves bearing Orbital Angular Momentum (OAM) by using a circular waveguide. The OAM mode ℓ = 1 is generated by using a spiral phase plate (SPP) inside a circular waveguide. We present here two methods to transform the classical guided modes to OAM wave. The resulting electrical field distribution and the radiation patterns evidence the properties of waves carrying OAM.
{"title":"Horn antenna for generating Orbital Angular Momentum (OAM) waves","authors":"W. Wei, K. Mahdjoubi, C. Brousseau, A. Sharaiha, O. Emile","doi":"10.1109/LAPC.2015.7365994","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7365994","url":null,"abstract":"We present a novel horn antenna to generate radio waves bearing Orbital Angular Momentum (OAM) by using a circular waveguide. The OAM mode ℓ = 1 is generated by using a spiral phase plate (SPP) inside a circular waveguide. We present here two methods to transform the classical guided modes to OAM wave. The resulting electrical field distribution and the radiation patterns evidence the properties of waves carrying OAM.","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":"126843219","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.2015.7366123
Chaoyun Song, Yi Huang, Qian Xu, Umniyyah Ulfa Hussine
A broadband circularly polarized (CP) cross-dipole antenna is proposed for GNSS applications. The antenna has a very simple structure and a small size but has a very broad impedance bandwidth from 1.15 to 1.75 GHz (a fractional bandwidth of 41.4%) for S11 <; -10 dB. The CP bandwidth is from 1.37 to 1.5 GHz for axial ratio <; 3 dB. A computer simulation is conducted to optimize its dimensions and predict its performance. The optimized antenna is fabricated and measured. The simulated and measured results are in good agreement and have demonstrated that the proposed antenna is indeed a very good candidate for GNSS applications.
{"title":"A broadband circularly polarized cross-dipole antenna for GNSS applications","authors":"Chaoyun Song, Yi Huang, Qian Xu, Umniyyah Ulfa Hussine","doi":"10.1109/LAPC.2015.7366123","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366123","url":null,"abstract":"A broadband circularly polarized (CP) cross-dipole antenna is proposed for GNSS applications. The antenna has a very simple structure and a small size but has a very broad impedance bandwidth from 1.15 to 1.75 GHz (a fractional bandwidth of 41.4%) for S11 <; -10 dB. The CP bandwidth is from 1.37 to 1.5 GHz for axial ratio <; 3 dB. A computer simulation is conducted to optimize its dimensions and predict its performance. The optimized antenna is fabricated and measured. The simulated and measured results are in good agreement and have demonstrated that the proposed antenna is indeed a very good candidate for GNSS applications.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"34 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":"126710556","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.2015.7366057
Zhouxiang Fei, Yi Huang, Jiafeng Zhou
The crosstalk is a very important aspect of cable EMC (electromagnetic compatibility) performance evaluation. As uncertainties are introduced during cable fabrication and installation process, deterministic prediction methods are not suitable for a good estimation of the cable performance. This paper is focused on predicting the crosstalk of cable bundles by considering the uncertainties introduced in three-conductor transmission lines. How the uncertainties of different parameters in three-conductor transmission lines might affect the crosstalk and its variations are investigated and a better understanding on how to avoid high crosstalk in applications is obtained and presented.
{"title":"Crosstalk variations caused by uncertainties in three-conductor transmission lines","authors":"Zhouxiang Fei, Yi Huang, Jiafeng Zhou","doi":"10.1109/LAPC.2015.7366057","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366057","url":null,"abstract":"The crosstalk is a very important aspect of cable EMC (electromagnetic compatibility) performance evaluation. As uncertainties are introduced during cable fabrication and installation process, deterministic prediction methods are not suitable for a good estimation of the cable performance. This paper is focused on predicting the crosstalk of cable bundles by considering the uncertainties introduced in three-conductor transmission lines. How the uncertainties of different parameters in three-conductor transmission lines might affect the crosstalk and its variations are investigated and a better understanding on how to avoid high crosstalk in applications is obtained and presented.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"8 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":"127472698","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.2015.7366038
E. Garcia, S. Llorente Romano, A. Garcia Lamperez, Francisco Javier Herraiz Martinez, M. Salazar Palma, Daniel Segovia Vargas, José Manuel Serna Puente, F. Tercero, Jose Antonio Lopez Perez, F. Colomer, J. A. López Fernández
VLBI2010 requires a feed that simultaneously has high efficiency over the full 2-14 GHz frequency range. The simultaneity requirement implies that the feed must operate at high efficiency over the full frequency range without the need to adjust its focal position to account for frequency dependent phase center variations. Two feeds meet this specification with some lacks to be fulfilled [1]: The Eleven Feed developed at Chalmers University and the Quadruple Ridged Flared Horn (QRFH) developed at the California Institute of Technology. In this frame, Universidad Carlos III de Madrid has developed a new topology for complete covering the requirements of the VLBI2010, including two new pretty attractive characteristics: dual circular polarization (versus the dual lineal solutions present in the state of the art) and constant input impedance of the antenna due to its self-complementary geometry, what is highly interesting for the LNA design. This manuscript is divided as follows: first, results of the complete system using an ideal Gaussian feed are summarized. Then, the new topology proposed is presented and analyzed both, isolated and integrated in the radiotelescope. Finally, a closed solution for covering all the requirements has been manufactured and results from full wave electromagnetic simulations together with measurements are presented. Conclusions and future lines are presented at the end of the present manuscript.
{"title":"Dyson conical quad-spiral array as ultrawideband feed system","authors":"E. Garcia, S. Llorente Romano, A. Garcia Lamperez, Francisco Javier Herraiz Martinez, M. Salazar Palma, Daniel Segovia Vargas, José Manuel Serna Puente, F. Tercero, Jose Antonio Lopez Perez, F. Colomer, J. A. López Fernández","doi":"10.1109/LAPC.2015.7366038","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366038","url":null,"abstract":"VLBI2010 requires a feed that simultaneously has high efficiency over the full 2-14 GHz frequency range. The simultaneity requirement implies that the feed must operate at high efficiency over the full frequency range without the need to adjust its focal position to account for frequency dependent phase center variations. Two feeds meet this specification with some lacks to be fulfilled [1]: The Eleven Feed developed at Chalmers University and the Quadruple Ridged Flared Horn (QRFH) developed at the California Institute of Technology. In this frame, Universidad Carlos III de Madrid has developed a new topology for complete covering the requirements of the VLBI2010, including two new pretty attractive characteristics: dual circular polarization (versus the dual lineal solutions present in the state of the art) and constant input impedance of the antenna due to its self-complementary geometry, what is highly interesting for the LNA design. This manuscript is divided as follows: first, results of the complete system using an ideal Gaussian feed are summarized. Then, the new topology proposed is presented and analyzed both, isolated and integrated in the radiotelescope. Finally, a closed solution for covering all the requirements has been manufactured and results from full wave electromagnetic simulations together with measurements are presented. Conclusions and future lines are presented at the end of the present manuscript.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"153 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":"123497874","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.2015.7366063
S. Jun, B. Sanz-Izquierdo
This paper proposes a coplanar waveguide (CPW) fed antenna and electromagnetic band gap (EBG) structure on 3D printed substrates. Low-cost fuse filament fabrication (FFF) technology is employed. Two sets of experiments are described. In the first, the antenna and EBG patterns are etched on copper clad Mylar® polyester film and attached to the 3D printed substrates. In the second, the patterns of the EBG are added using silver conductive paint. Both experiments compare very well between them, and with the simulations. The EBG structure provides improved antenna performance such as gain, efficiency and directivity. The antenna and EBG are designed for the 2.4 GHz Bluetooth frequency band. The Finite-difference timedomain (FDTD) computational method was used for the study.
{"title":"A CPW-fed antenna on 3D printed EBG substrate","authors":"S. Jun, B. Sanz-Izquierdo","doi":"10.1109/LAPC.2015.7366063","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366063","url":null,"abstract":"This paper proposes a coplanar waveguide (CPW) fed antenna and electromagnetic band gap (EBG) structure on 3D printed substrates. Low-cost fuse filament fabrication (FFF) technology is employed. Two sets of experiments are described. In the first, the antenna and EBG patterns are etched on copper clad Mylar® polyester film and attached to the 3D printed substrates. In the second, the patterns of the EBG are added using silver conductive paint. Both experiments compare very well between them, and with the simulations. The EBG structure provides improved antenna performance such as gain, efficiency and directivity. The antenna and EBG are designed for the 2.4 GHz Bluetooth frequency band. The Finite-difference timedomain (FDTD) computational method was used for the study.","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":"123185887","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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