This paper presents a pattern reconfigurable antenna operating in the 36~40 GHz band. It is projected to be used on handheld devices for future 5G wireless communications. The proposed design is a multi-antenna system, which comprises a reconfigurable power divider that excites one or multiple antennas according to system's commands. The diversified antenna excitation combinations provide various radiation patterns to meet the wideband mobile communication need of the future 5G handset. The main challenge is to maintain a proper matching condition under different excitation configurations. In the proposed design, a simple matching circuit is employed to match all cases. A total of fifteen radiation patterns is provided with a four-antenna system.
{"title":"Pattern reconfigurable millimeter-wave antenna design for 5G handset applications","authors":"W. Chang, Chang-Fa Yang, Chih-Kai Chang, Wen-Jiao Liao, Liang Cho, Wen-Shyh Chen","doi":"10.1109/EUCAP.2016.7481321","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481321","url":null,"abstract":"This paper presents a pattern reconfigurable antenna operating in the 36~40 GHz band. It is projected to be used on handheld devices for future 5G wireless communications. The proposed design is a multi-antenna system, which comprises a reconfigurable power divider that excites one or multiple antennas according to system's commands. The diversified antenna excitation combinations provide various radiation patterns to meet the wideband mobile communication need of the future 5G handset. The main challenge is to maintain a proper matching condition under different excitation configurations. In the proposed design, a simple matching circuit is employed to match all cases. A total of fifteen radiation patterns is provided with a four-antenna system.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"2 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89044368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481670
S. Ahsan, Ziwen Guo, I. Gouzouasis, E. Kallos, P. Kosmas
This paper introduces a modified slotted triangular patch antenna for microwave tomography. We compare various designs based on different substrate materials, operating in free space and in front of different types of dielectric loading. Our designs are based on varying the distance of the slot from the base of the triangular patch, as well as the angle of the V slot. We also present a more compact version of the original design, which may be useful for microwave tomography.
{"title":"Development of a slotted triangular patch antenna for microwave tomography","authors":"S. Ahsan, Ziwen Guo, I. Gouzouasis, E. Kallos, P. Kosmas","doi":"10.1109/EUCAP.2016.7481670","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481670","url":null,"abstract":"This paper introduces a modified slotted triangular patch antenna for microwave tomography. We compare various designs based on different substrate materials, operating in free space and in front of different types of dielectric loading. Our designs are based on varying the distance of the slot from the base of the triangular patch, as well as the angle of the V slot. We also present a more compact version of the original design, which may be useful for microwave tomography.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"41 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90148496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481327
H. A. Rahman, S. Rahim, M. Abedian, N. Najib
A design of flexible antenna using printed silver loaded epoxy (SLE) on polydimethylsiloxane/plastic (PDMS/plastic) substrate is demonstrated in this study. The conductive SLE is printed in a PDMS material by using a simple and efficient printing approach in order to produce an alternative cost-effective method for implementing conformal and flexible antenna. The proposed antenna performance is studied and improved by attaching a plastic substrate layer on the PDMS layer. The antenna gain, efficiency and flexibility is significantly improved by utilizing novel materials and effective techniques. The antenna can be integrated to flexible electronic systems for wearable applications.
{"title":"Design of a flexible antenna using printed silver loaded epoxy on PDMS/plastic substrate for wearable applications","authors":"H. A. Rahman, S. Rahim, M. Abedian, N. Najib","doi":"10.1109/EUCAP.2016.7481327","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481327","url":null,"abstract":"A design of flexible antenna using printed silver loaded epoxy (SLE) on polydimethylsiloxane/plastic (PDMS/plastic) substrate is demonstrated in this study. The conductive SLE is printed in a PDMS material by using a simple and efficient printing approach in order to produce an alternative cost-effective method for implementing conformal and flexible antenna. The proposed antenna performance is studied and improved by attaching a plastic substrate layer on the PDMS layer. The antenna gain, efficiency and flexibility is significantly improved by utilizing novel materials and effective techniques. The antenna can be integrated to flexible electronic systems for wearable applications.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"13 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90496612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481722
E. García-Marín, J. Masa-Campos, P. Sánchez-Olivares
A 4 × 4 linearly-polarized stacked-patch array with a fully corporate feeding network for Ku-band is presented in its work. Antenna replication in larger arrays is straightforward with this corporate approach, which in addition prevents unintended main beam steering. The feeding structure is divided in two levels, where the first power distribution is made in Substrate Integrated Waveguide and the second in microstrip technology. This procedure takes advantage of the strengths of each technology, combining waveguide low losses with microstrip versatility. A 18.4-dBi gain is attained in simulation with matching better than -14 dB in the entire bandwidth.
{"title":"4 x 4 stacked patch array with siw and microstrip corporate feeding network for ku-band","authors":"E. García-Marín, J. Masa-Campos, P. Sánchez-Olivares","doi":"10.1109/EUCAP.2016.7481722","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481722","url":null,"abstract":"A 4 × 4 linearly-polarized stacked-patch array with a fully corporate feeding network for Ku-band is presented in its work. Antenna replication in larger arrays is straightforward with this corporate approach, which in addition prevents unintended main beam steering. The feeding structure is divided in two levels, where the first power distribution is made in Substrate Integrated Waveguide and the second in microstrip technology. This procedure takes advantage of the strengths of each technology, combining waveguide low losses with microstrip versatility. A 18.4-dBi gain is attained in simulation with matching better than -14 dB in the entire bandwidth.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"3 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88830590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481735
D. Tihon, Christophe Craeye
Full-wave simulations of 2D periodic arrays using the Method of Moments (MoM) are investigated. A method based on plane wave decomposition is used to fill the MoM impedance matrix. For pair of basis and testing functions that are close to each other, a singular term is removed before extrapolating the value of the impedance matrix using a Taylor expansion. The two main advantages of this method are the easy computation of the derivative of the impedance matrix involved in the Taylor expansion and the fact that the singularity extraction can be performed once for all phase shifts between consecutive unit cells. The latter property proves to be useful when the Array Scanning Method (ASM) is to be used.
{"title":"Fast computation of the impedance matrix for the periodic Method of Moments using a plane wave decomposition","authors":"D. Tihon, Christophe Craeye","doi":"10.1109/EUCAP.2016.7481735","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481735","url":null,"abstract":"Full-wave simulations of 2D periodic arrays using the Method of Moments (MoM) are investigated. A method based on plane wave decomposition is used to fill the MoM impedance matrix. For pair of basis and testing functions that are close to each other, a singular term is removed before extrapolating the value of the impedance matrix using a Taylor expansion. The two main advantages of this method are the easy computation of the derivative of the impedance matrix involved in the Taylor expansion and the fact that the singularity extraction can be performed once for all phase shifts between consecutive unit cells. The latter property proves to be useful when the Array Scanning Method (ASM) is to be used.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"36 5 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89142225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481747
I. Iliopoulos, M. Ettorre, M. Casaletti, R. Sauleau, P. Pouliguen, P. Potier
The near-field (NF) regime is a highly challenging and rather unstudied area of electromagnetic (EM) fields due to the high mathematical complexity that it presents. Nevertheless, the evanescent fields, present within the near field, can offer extra flexibility and freedom in molding the close-to-the-antenna field. In this work we develop an algorithm capable to shape the EM fields according to specifications in 3D regions at distances within the near-field and Fresnel region of the radiating device. The algorithm is based on a set theoretic approach and a frontand- back iterative propagation scheme, where the use of FFT is playing a key role in speeding up the algorithm's application. A prototype using a Radial Line Slot Antenna (RLSA) topology has been manufactured to prove the concept.
{"title":"3D near-field shaping of a focused aperture","authors":"I. Iliopoulos, M. Ettorre, M. Casaletti, R. Sauleau, P. Pouliguen, P. Potier","doi":"10.1109/EUCAP.2016.7481747","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481747","url":null,"abstract":"The near-field (NF) regime is a highly challenging and rather unstudied area of electromagnetic (EM) fields due to the high mathematical complexity that it presents. Nevertheless, the evanescent fields, present within the near field, can offer extra flexibility and freedom in molding the close-to-the-antenna field. In this work we develop an algorithm capable to shape the EM fields according to specifications in 3D regions at distances within the near-field and Fresnel region of the radiating device. The algorithm is based on a set theoretic approach and a frontand- back iterative propagation scheme, where the use of FFT is playing a key role in speeding up the algorithm's application. A prototype using a Radial Line Slot Antenna (RLSA) topology has been manufactured to prove the concept.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"87 7","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91445618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481155
C. S. Arismar, I. F. da Costa, S. Pinna, S. Melo, F. Laghezza, F. Scotti, P. Ghelfi, D. Spadoti, A. Bogoni
This paper reports the development of a dual-band slotted waveguide antenna array with orthogonal polarizations for dual-use radars. It can be applied for simultaneously enabling communications and tracking functions. The radiating structure is composed by two groups of slots milled into the waveguide opposite faces, allowing an antenna operation over two different frequency bands. Numerical results obtained using ANSYS HFSS and measurements demonstrate two bandwidths of approximately 11.42% and 3.27% in the S-band and C-band, respectively. The antenna gain varies from 11.12dBi at 2.5GHz to 18.92dBi at 4.9GHz. Experiments of a dual-use 64-QAM OFDM wireless communications at 4.9GHz and radar operation in terms of Doppler measurement of a moving target at 2.5GHz illustrate the applicability of the proposed antenna array.
{"title":"A novel dual-polarization and dual-band slotted waveguide antenna array for dual-use radars","authors":"C. S. Arismar, I. F. da Costa, S. Pinna, S. Melo, F. Laghezza, F. Scotti, P. Ghelfi, D. Spadoti, A. Bogoni","doi":"10.1109/EUCAP.2016.7481155","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481155","url":null,"abstract":"This paper reports the development of a dual-band slotted waveguide antenna array with orthogonal polarizations for dual-use radars. It can be applied for simultaneously enabling communications and tracking functions. The radiating structure is composed by two groups of slots milled into the waveguide opposite faces, allowing an antenna operation over two different frequency bands. Numerical results obtained using ANSYS HFSS and measurements demonstrate two bandwidths of approximately 11.42% and 3.27% in the S-band and C-band, respectively. The antenna gain varies from 11.12dBi at 2.5GHz to 18.92dBi at 4.9GHz. Experiments of a dual-use 64-QAM OFDM wireless communications at 4.9GHz and radar operation in terms of Doppler measurement of a moving target at 2.5GHz illustrate the applicability of the proposed antenna array.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83110951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481442
S. Matos, E. Lima, Jorge R. Costa, C. Fernandes, N. Fonseca
A new design of planar lenses for mechanical beam steering at Ka-band is presented, which enables achieving simultaneously wide scanning coverage (40 degrees) with high directivity (40 dBi) and low beam distortion (side lobe level below -15 dB and scan loss better than -2.4 dB). The steering mechanism based on in-plane lens translation/rotation has been demonstrated in a previous 30 dBi antenna prototype at 30 GHz. We showed that aberrations, caused by the in-plane lens translation, become more significant with the increase of the lens size. Hence, the presented 30 dBi lens solution cannot be simply scaled to achieve the aimed 40 dBi directivity (a common specification for satellite communications at Ka-Band). Using a PO/GO approach, implemented in CST Microwave Studio®, we prove that the proposed bifocal design outperforms conventional unifocal phase correction.
{"title":"Design of a 40 dBi planar bifocal lens for mechanical beam steering at Ka-band","authors":"S. Matos, E. Lima, Jorge R. Costa, C. Fernandes, N. Fonseca","doi":"10.1109/EUCAP.2016.7481442","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481442","url":null,"abstract":"A new design of planar lenses for mechanical beam steering at Ka-band is presented, which enables achieving simultaneously wide scanning coverage (40 degrees) with high directivity (40 dBi) and low beam distortion (side lobe level below -15 dB and scan loss better than -2.4 dB). The steering mechanism based on in-plane lens translation/rotation has been demonstrated in a previous 30 dBi antenna prototype at 30 GHz. We showed that aberrations, caused by the in-plane lens translation, become more significant with the increase of the lens size. Hence, the presented 30 dBi lens solution cannot be simply scaled to achieve the aimed 40 dBi directivity (a common specification for satellite communications at Ka-Band). Using a PO/GO approach, implemented in CST Microwave Studio®, we prove that the proposed bifocal design outperforms conventional unifocal phase correction.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83160944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481464
R. Conceição, D. Byrne, J. A. Noble, I. Craddock
In this paper classification algorithms will be used to investigate the presence of tumours in the breast, from signals collected with a radar microwave imaging prototype from the University of Bristol. A number of features will be extracted from the scattering of breast tumours and will then be used in classification algorithms such as Linear Discriminant Analysis or Quadratic Discriminant Analysis. The results from the classifier will allow creating an image of the considered synthetic breast phantom in which normal breast tissue is classified as a “miss” and tumour tissue is classified as a “hit”.
{"title":"Initial study for the investigation of breast tumour response with classification algorithms using a microwave radar prototype","authors":"R. Conceição, D. Byrne, J. A. Noble, I. Craddock","doi":"10.1109/EUCAP.2016.7481464","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481464","url":null,"abstract":"In this paper classification algorithms will be used to investigate the presence of tumours in the breast, from signals collected with a radar microwave imaging prototype from the University of Bristol. A number of features will be extracted from the scattering of breast tumours and will then be used in classification algorithms such as Linear Discriminant Analysis or Quadratic Discriminant Analysis. The results from the classifier will allow creating an image of the considered synthetic breast phantom in which normal breast tissue is classified as a “miss” and tumour tissue is classified as a “hit”.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"21 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83711947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-04-10DOI: 10.1109/EUCAP.2016.7481278
L. Foged, F. Saccardi, A. Giacomini
Probe Correction (PC) in Spherical Near Field (SNF) measurements is typically performed involving the so called first order PC algorithm [1]-[3] which assumes probes with limited |μ|=1 spherical wave spectrum. Lot of effort is typically put in the developments of probes with such requirement [4]-[5] but their design is in many case very challenging especially for wide-band applications. In order to have less restrictions in the selection of the probe, different full probe correction techniques have been recently proposed [6]-[9]. In this paper the accuracy and limitation of the first and higher order PC algorithms are investigated considering the SNF measurement of a wideband horn measured with a first order probe and with a standard gain antenna with higher modal content. The full PC algorithm here considered is based on the modification of the spherical basis functions that are properly elaborated taking into account the effect of the probe.
{"title":"Higher order versus first order Probe Correction techniques applied to experimental spherical NF antenna measurements","authors":"L. Foged, F. Saccardi, A. Giacomini","doi":"10.1109/EUCAP.2016.7481278","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481278","url":null,"abstract":"Probe Correction (PC) in Spherical Near Field (SNF) measurements is typically performed involving the so called first order PC algorithm [1]-[3] which assumes probes with limited |μ|=1 spherical wave spectrum. Lot of effort is typically put in the developments of probes with such requirement [4]-[5] but their design is in many case very challenging especially for wide-band applications. In order to have less restrictions in the selection of the probe, different full probe correction techniques have been recently proposed [6]-[9]. In this paper the accuracy and limitation of the first and higher order PC algorithms are investigated considering the SNF measurement of a wideband horn measured with a first order probe and with a standard gain antenna with higher modal content. The full PC algorithm here considered is based on the modification of the spherical basis functions that are properly elaborated taking into account the effect of the probe.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"34 4 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83760391","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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