Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366059
M. Frongillo, G. Riccio, G. Gennarelli
Closed form solutions for evaluating the field diffracted by a junction consisting of a tapered lossless dielectric wedge on a perfectly conducting surface are presented in this paper. They are obtained by formulating the radiation integral in terms of electric and magnetic physical optics surface currents, and by using useful analytical manipulations completed by uniform asymptotic evaluations of the resulting integrals. The effectiveness of the proposed solutions is tested via numerical simulations.
{"title":"FD-UAPO solutions for the diffraction by a penetrable wedge on a PEC ground plane","authors":"M. Frongillo, G. Riccio, G. Gennarelli","doi":"10.1109/LAPC.2015.7366059","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366059","url":null,"abstract":"Closed form solutions for evaluating the field diffracted by a junction consisting of a tapered lossless dielectric wedge on a perfectly conducting surface are presented in this paper. They are obtained by formulating the radiation integral in terms of electric and magnetic physical optics surface currents, and by using useful analytical manipulations completed by uniform asymptotic evaluations of the resulting integrals. The effectiveness of the proposed solutions is tested via numerical simulations.","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":"128655881","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.2015.7366066
M. Kod, Jiafeng Zhou, Yi Huang, R. Alrawashdeh, M. Hussein
A dual broadband flexible butterfly loop antenna is designed to be worn on a human body which covers several important bands for wearable applications including the MedRadio band 402-406 MHz and ISM bands (433-434, 902-928 and 2400-2483.5) MHz. This antenna offers two wide bands for the reflection coefficient S11 -10 dB from 430-1003 MHz and 2004-2700 MHz with bandwidths of 573 and 696 MHz respectively. The MedRadio band is covered with S11 under -6 dB. This feature gives the antenna robustness against the frequency detuning effects of the body and makes it suitable for in-body services such as communication and wireless power transfer.
{"title":"A dual broadband butterfly loop antenna for body wearable applications","authors":"M. Kod, Jiafeng Zhou, Yi Huang, R. Alrawashdeh, M. Hussein","doi":"10.1109/LAPC.2015.7366066","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366066","url":null,"abstract":"A dual broadband flexible butterfly loop antenna is designed to be worn on a human body which covers several important bands for wearable applications including the MedRadio band 402-406 MHz and ISM bands (433-434, 902-928 and 2400-2483.5) MHz. This antenna offers two wide bands for the reflection coefficient S11 -10 dB from 430-1003 MHz and 2004-2700 MHz with bandwidths of 573 and 696 MHz respectively. The MedRadio band is covered with S11 under -6 dB. This feature gives the antenna robustness against the frequency detuning effects of the body and makes it suitable for in-body services such as communication and wireless power transfer.","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":"114415014","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.2015.7365999
U. Virk, J. Wagen, K. Haneda
Laser scanning of physical environments allows us to construct their accurate structural database. This database is called a point cloud. Radio channel prediction employing the point cloud is a promising new method for millimeter-wave (mm-wave) frequencies. Reported works that predict the radio channel based on the point cloud utilizes a diffuse scattering model with reasonable accuracy if the environment under consideration is small and diffuse dominant. Specular reflections are also crucial propagation phenomena at mm-wave frequencies. However, a mathematical formulation to predict specular reflections is still lacking. This paper presents the formulation for simulating specular reflections based on a point cloud geometrical description of an environment. It evaluates the total specular reflected field as a coherent sum of the individual field contributions originating from the elementary surfaces over an area approximately equal to the first Fresnel reflection zone. The numerical and experimental results demonstrate the accuracy of the proposed formulation.
{"title":"Simulating specular reflections for point cloud geometrical database of the environment","authors":"U. Virk, J. Wagen, K. Haneda","doi":"10.1109/LAPC.2015.7365999","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7365999","url":null,"abstract":"Laser scanning of physical environments allows us to construct their accurate structural database. This database is called a point cloud. Radio channel prediction employing the point cloud is a promising new method for millimeter-wave (mm-wave) frequencies. Reported works that predict the radio channel based on the point cloud utilizes a diffuse scattering model with reasonable accuracy if the environment under consideration is small and diffuse dominant. Specular reflections are also crucial propagation phenomena at mm-wave frequencies. However, a mathematical formulation to predict specular reflections is still lacking. This paper presents the formulation for simulating specular reflections based on a point cloud geometrical description of an environment. It evaluates the total specular reflected field as a coherent sum of the individual field contributions originating from the elementary surfaces over an area approximately equal to the first Fresnel reflection zone. The numerical and experimental results demonstrate the accuracy of the proposed formulation.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"11 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":"132406767","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.2015.7366016
Tiago F. Antunes, M. Ribeiro, J. Acebrón
In this article we present a probabilistic spectral partition theory for a previously derived Monte Carlo method and show how to use it for the numerical simulation of Gaussian pulse propagation in a lossy transmission line with resistive boundary conditions. The spectral partition method consists in the random generation of frequencies, inside the source that feeds the line, and establishes the connection between the Monte Carlo line method and the tools of circuit analysis in the frequency domain. The main aspects regarding the implementation of this Monte Carlo algorithm are also addressed.
{"title":"Uniform spectral partition method for the propagation of Gaussian pulses on lossy transmission lines using the Monte Carlo method","authors":"Tiago F. Antunes, M. Ribeiro, J. Acebrón","doi":"10.1109/LAPC.2015.7366016","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366016","url":null,"abstract":"In this article we present a probabilistic spectral partition theory for a previously derived Monte Carlo method and show how to use it for the numerical simulation of Gaussian pulse propagation in a lossy transmission line with resistive boundary conditions. The spectral partition method consists in the random generation of frequencies, inside the source that feeds the line, and establishes the connection between the Monte Carlo line method and the tools of circuit analysis in the frequency domain. The main aspects regarding the implementation of this Monte Carlo algorithm are also addressed.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"43 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":"133450453","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.2015.7366043
F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi
The nonredundant sampling representations of electromagnetic fields are here properly applied to develop an optimal sampling interpolation formula over a plane in the time domain (TD) from a minimum number of bi-polar near-field data. It uses a very flexible source modelling, able to fit very well the ultra wide band (UWB) antennas typically employed for communication applications and modern radars. Such a modelling is obtained by considering the antenna as enclosed in a surface formed by two circular bowls with the same aperture diameter, but with eventually different lateral bends. Numerical examples assessing the effectiveness of the interpolation scheme are shown.
{"title":"Optimal sampling interpolation over a plane from transient bi-polar near-field data","authors":"F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi","doi":"10.1109/LAPC.2015.7366043","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366043","url":null,"abstract":"The nonredundant sampling representations of electromagnetic fields are here properly applied to develop an optimal sampling interpolation formula over a plane in the time domain (TD) from a minimum number of bi-polar near-field data. It uses a very flexible source modelling, able to fit very well the ultra wide band (UWB) antennas typically employed for communication applications and modern radars. Such a modelling is obtained by considering the antenna as enclosed in a surface formed by two circular bowls with the same aperture diameter, but with eventually different lateral bends. Numerical examples assessing the effectiveness of the interpolation scheme are shown.","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":"133549120","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.2015.7366084
H. Visser
This paper reports first results in applying CST Microwave Studio in combination with a human voxel model and a dedicatedly developed equivalent cardiac cycle source. Based on first coarse-meshing simulation results it may be concluded that it is feasible to model the heart in a three-dimensional anthropomorphic voxel model of a human being by an equivalent fixed dipole volume source. Through changing the amplitude and orientation over the cardiac cycle, ECG signals may be obtained from the chest area of the voxel model.
{"title":"Taking ECG-signals from a human voxel model","authors":"H. Visser","doi":"10.1109/LAPC.2015.7366084","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366084","url":null,"abstract":"This paper reports first results in applying CST Microwave Studio in combination with a human voxel model and a dedicatedly developed equivalent cardiac cycle source. Based on first coarse-meshing simulation results it may be concluded that it is feasible to model the heart in a three-dimensional anthropomorphic voxel model of a human being by an equivalent fixed dipole volume source. Through changing the amplitude and orientation over the cardiac cycle, ECG signals may be obtained from the chest area of the voxel model.","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":"130252340","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.2015.7366061
Gerhard F. Hamberger, S. Trummer, U. Siart, T. Eibert
A novel concept for a dual-polarized microstrip antenna array with a center frequency of 23.75 GHz is introduced. The array is composed of ten single square patch elements having equal resonance frequencies in both directions. The microstrip patches are rotated by 45 ° and linearly aligned to obtain a fan beam antenna characteristic. The feed structure is in seriesparallel configuration with best advantages in space saving. The antenna array is fully planar and compact but has nevertheless a very low cross-talk between its two orthogonal channels of <; -30 dB. The sidelobe level (SLL) of the antenna array is decreased to -16.8 dB by implementing an amplitude taper according to Dolph-Chebyshev (DC). The main beam direction for both polarizations of the antenna array is boresight, with a half-power beamwidth (HPBW) of 10 ° for φ = 0° and 100 ° for φ = 90°. By using an array of these fan beam antenna arrays, one-dimensional beamforming applications can be realized. Due to its high polarization purity, low sidelobe level and fan-beam characteristics, the antenna array can be used in 5G mobile applications.
{"title":"A planar dual-polarized microstrip antenna array in series-parallel feed configuration","authors":"Gerhard F. Hamberger, S. Trummer, U. Siart, T. Eibert","doi":"10.1109/LAPC.2015.7366061","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366061","url":null,"abstract":"A novel concept for a dual-polarized microstrip antenna array with a center frequency of 23.75 GHz is introduced. The array is composed of ten single square patch elements having equal resonance frequencies in both directions. The microstrip patches are rotated by 45 ° and linearly aligned to obtain a fan beam antenna characteristic. The feed structure is in seriesparallel configuration with best advantages in space saving. The antenna array is fully planar and compact but has nevertheless a very low cross-talk between its two orthogonal channels of <; -30 dB. The sidelobe level (SLL) of the antenna array is decreased to -16.8 dB by implementing an amplitude taper according to Dolph-Chebyshev (DC). The main beam direction for both polarizations of the antenna array is boresight, with a half-power beamwidth (HPBW) of 10 ° for φ = 0° and 100 ° for φ = 90°. By using an array of these fan beam antenna arrays, one-dimensional beamforming applications can be realized. Due to its high polarization purity, low sidelobe level and fan-beam characteristics, the antenna array can be used in 5G mobile applications.","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":"130456945","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.2015.7366053
M. Ojaroudi, O. Civi
In this paper a simple printed slot antenna with an enhanced bandwidth based on self-complementary structures is presented for UWB applications. The proposed antenna consists of a square radiating patch with a microstrip feed-line defected by an inverted U-shaped slot on one side, a rectangular slot and a defected ground plane by an inverted U-shaped strip protruded from rectangular slot on the other side. The antenna provides a wide usable fractional bandwidth of more than 100% (3.2-10.5 GHz). This large operating bandwidth is obtained by choosing suitable dimensions for the proposed quasi-self-complementary matching circuit. The designed antenna has a small volume of 20×20×0.8 mm3. It exhibits almost omnidirectional radiation pattern with low cross polarization level.
{"title":"A novel UWB slot antenna with a self-complementary matching network","authors":"M. Ojaroudi, O. Civi","doi":"10.1109/LAPC.2015.7366053","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366053","url":null,"abstract":"In this paper a simple printed slot antenna with an enhanced bandwidth based on self-complementary structures is presented for UWB applications. The proposed antenna consists of a square radiating patch with a microstrip feed-line defected by an inverted U-shaped slot on one side, a rectangular slot and a defected ground plane by an inverted U-shaped strip protruded from rectangular slot on the other side. The antenna provides a wide usable fractional bandwidth of more than 100% (3.2-10.5 GHz). This large operating bandwidth is obtained by choosing suitable dimensions for the proposed quasi-self-complementary matching circuit. The designed antenna has a small volume of 20×20×0.8 mm3. It exhibits almost omnidirectional radiation pattern with low cross polarization level.","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":"130066061","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.2015.7365991
N. Rao, V. Dinesh Kumar
A novel fractal microstrip patch antenna has been proposed which is based on the Smith Chart design. The Smith Chart circles consist of two types of circles. The proposed design of fractal microstrip patch antenna has exploited one set of Smith Chart circles. The dielectric material used for the proposed microstrip patch antenna is Rogers TMM4 with a dielectric constant of 4.55 and the patch is made up of annealed copper. The proposed fractal geometry possesses multiband behavior at 1.75 GHz., 2.50 GHz., 3.05 GHz. and 4.42 GHz. for Second iteration with S11 less than -10 dB. The gains of the final antenna design are 6.15dBi.; 6.91 dBi.; 5.85 dBi.; 6.93 dBi. at the respective frequencies.
{"title":"Fractal slots on circular patch inspired by smith chart for GSM, radar, WLAN, and its application","authors":"N. Rao, V. Dinesh Kumar","doi":"10.1109/LAPC.2015.7365991","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7365991","url":null,"abstract":"A novel fractal microstrip patch antenna has been proposed which is based on the Smith Chart design. The Smith Chart circles consist of two types of circles. The proposed design of fractal microstrip patch antenna has exploited one set of Smith Chart circles. The dielectric material used for the proposed microstrip patch antenna is Rogers TMM4 with a dielectric constant of 4.55 and the patch is made up of annealed copper. The proposed fractal geometry possesses multiband behavior at 1.75 GHz., 2.50 GHz., 3.05 GHz. and 4.42 GHz. for Second iteration with S11 less than -10 dB. The gains of the final antenna design are 6.15dBi.; 6.91 dBi.; 5.85 dBi.; 6.93 dBi. at the respective frequencies.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"56 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":"123441032","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.2015.7366120
P. Ghaderi, H. Aliakbarian, R. Sadeghzadeh
In this paper, integration of one dimensional wire grid antennas and solar cells are investigated. In such a structure, solar cells are centered inside wire grid loops. Due to characteristics of wire grid antennas, we are able to minimize antenna shading on the solar cells to a negligible level while keeping the antenna efficiency within an acceptable range. First, a one dimensional wire grid antenna in 2.2 GHz is designed alone and then is integrated with GaAs solar cells for two cases of 4-cell and 6-cell grid arrays. The final 6-cell integrated antenna has almost 14.6 dB of gain while keeping the simulated efficiency at 75.1%.
{"title":"Integration of one dimentional wire grid antennas with solar cells for LEO satellite application","authors":"P. Ghaderi, H. Aliakbarian, R. Sadeghzadeh","doi":"10.1109/LAPC.2015.7366120","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366120","url":null,"abstract":"In this paper, integration of one dimensional wire grid antennas and solar cells are investigated. In such a structure, solar cells are centered inside wire grid loops. Due to characteristics of wire grid antennas, we are able to minimize antenna shading on the solar cells to a negligible level while keeping the antenna efficiency within an acceptable range. First, a one dimensional wire grid antenna in 2.2 GHz is designed alone and then is integrated with GaAs solar cells for two cases of 4-cell and 6-cell grid arrays. The final 6-cell integrated antenna has almost 14.6 dB of gain while keeping the simulated efficiency at 75.1%.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"82 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":"115601023","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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