Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550182
A. Lalbakhsh, K. Esselle
This paper presents an effective technique for radiation patterns improvement of a Febry-Perot cavity antenna by improving the near field phase distribution. A printed structure named phase correcting structure (PCS) is placed above the Febry-Perot cavity antenna to enhance phase uniformity along the H-plane by varying the size of metallic patches in the PCS. The achieved phase uniformity also results in 5.6 dBi increase in the peak directivity of the antenna.
{"title":"Directivity improvement of a Fabry-Perot cavity antenna by enhancing near field characteristic","authors":"A. Lalbakhsh, K. Esselle","doi":"10.1109/ANTEM.2016.7550182","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550182","url":null,"abstract":"This paper presents an effective technique for radiation patterns improvement of a Febry-Perot cavity antenna by improving the near field phase distribution. A printed structure named phase correcting structure (PCS) is placed above the Febry-Perot cavity antenna to enhance phase uniformity along the H-plane by varying the size of metallic patches in the PCS. The achieved phase uniformity also results in 5.6 dBi increase in the peak directivity of the antenna.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123886154","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550226
I. Ciric
Matrix series related to the solution of systems of linear algebraic equations are derived starting from the solution of a special type of a linear system of differential equations of the first order. The convergence of these series is adequate for computing efficiently approximate solutions of large systems of algebraic equations.
{"title":"Rapidly convergent matrix series for solving linear systems of equations","authors":"I. Ciric","doi":"10.1109/ANTEM.2016.7550226","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550226","url":null,"abstract":"Matrix series related to the solution of systems of linear algebraic equations are derived starting from the solution of a special type of a linear system of differential equations of the first order. The convergence of these series is adequate for computing efficiently approximate solutions of large systems of algebraic equations.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121398383","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550155
R. Amiri, B. Zarghooni, A. Dadgarpour, J. Pourahmadazar, T. Denidni
In this paper a new reconfigurable metamaterial unit-cell is presented. The unit-cell has two PIN-diodes and operates in the frequency range of 1-4 GHz. Four different configurations can be achieved by switching the diodes that provides a maximum difference of 2 in the value of the unit-cell's refractive index. This unit-cell can be used in advanced reconfigurable antenna applications.
{"title":"Reconfigurable metamaterial unit-cell with controllable refractive index","authors":"R. Amiri, B. Zarghooni, A. Dadgarpour, J. Pourahmadazar, T. Denidni","doi":"10.1109/ANTEM.2016.7550155","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550155","url":null,"abstract":"In this paper a new reconfigurable metamaterial unit-cell is presented. The unit-cell has two PIN-diodes and operates in the frequency range of 1-4 GHz. Four different configurations can be achieved by switching the diodes that provides a maximum difference of 2 in the value of the unit-cell's refractive index. This unit-cell can be used in advanced reconfigurable antenna applications.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132035036","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550220
S. A. Aghdam, J. Bagby, Raul J. Pia
In this letter, we propose a Broadband stacked, low-cost low profile, based on an aperture coupled feeding with linear array. Paper presents the experimental investigations carried out for obtaining X-band operation of rectangular microstrip antenna by using aperture coupled feeding technique. Frequency range set at approximately 8.6 to 10.9 GHz, by incorporating frequency range of the antenna resonates for single wideband with an impedance bandwidth of 23%. The enhancement of impedance bandwidth and gain does not disturb the humor of broadside radiation characteristics. The design concepts of antennas are presented and experimental results are discussed. This letter describes the design, operation, and realization of the beamforming array antenna.
{"title":"Design and development of linear array of rectangular aperture coupled microstrip antennas with application in beamforming","authors":"S. A. Aghdam, J. Bagby, Raul J. Pia","doi":"10.1109/ANTEM.2016.7550220","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550220","url":null,"abstract":"In this letter, we propose a Broadband stacked, low-cost low profile, based on an aperture coupled feeding with linear array. Paper presents the experimental investigations carried out for obtaining X-band operation of rectangular microstrip antenna by using aperture coupled feeding technique. Frequency range set at approximately 8.6 to 10.9 GHz, by incorporating frequency range of the antenna resonates for single wideband with an impedance bandwidth of 23%. The enhancement of impedance bandwidth and gain does not disturb the humor of broadside radiation characteristics. The design concepts of antennas are presented and experimental results are discussed. This letter describes the design, operation, and realization of the beamforming array antenna.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132372820","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550121
Wei Wang, E. Gill, Weimin Huang
High frequency surface wave radars have been used to measure ocean surface parameters, among which wind speed is the most challenging to estimate. Existing wind methods are only applicable to fully-developed, unlimited fetch seas. Here, a method is proposed for determining wind speeds for a fetch-limited sea. By differentiating the second-order radar cross section, an expression is derived, relating wind speed and the second-order peak Doppler frequency. The algorithm was tested using simulated data and has produced promising results.
{"title":"Determination of sea surface wind speed for a fetch-limited sea using high frequency radar","authors":"Wei Wang, E. Gill, Weimin Huang","doi":"10.1109/ANTEM.2016.7550121","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550121","url":null,"abstract":"High frequency surface wave radars have been used to measure ocean surface parameters, among which wind speed is the most challenging to estimate. Existing wind methods are only applicable to fully-developed, unlimited fetch seas. Here, a method is proposed for determining wind speeds for a fetch-limited sea. By differentiating the second-order radar cross section, an expression is derived, relating wind speed and the second-order peak Doppler frequency. The algorithm was tested using simulated data and has produced promising results.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193042","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550104
I. Jouny
This paper utilizes a recently developed frequency estimation algorithm [3] in identifying the scattering centers of a target as seen by stepped-frequency radar. This approach can be applied whether the recorded data is equally spaced (even with some missing) or not equally spaced. The technique is tested using two synthetic scattering models, then applied to real radar backscatter recorded in a compact range at high SNR. The results show that it is possible to extract relevant scattering information under various data scenarios.
{"title":"Estimation of scattering centers using equally or unequally spaced stepped frequency radar data","authors":"I. Jouny","doi":"10.1109/ANTEM.2016.7550104","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550104","url":null,"abstract":"This paper utilizes a recently developed frequency estimation algorithm [3] in identifying the scattering centers of a target as seen by stepped-frequency radar. This approach can be applied whether the recorded data is equally spaced (even with some missing) or not equally spaced. The technique is tested using two synthetic scattering models, then applied to real radar backscatter recorded in a compact range at high SNR. The results show that it is possible to extract relevant scattering information under various data scenarios.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130913569","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550139
Abdullah Alomar, S. Al-Saif, M. Ashraf, S. Alshebeili
A Millimeter-wave series-fed microstrip patch array antenna that operates over the band 27.6 GHz to 30 GHz is presented in this paper. The designed antenna shows a reflection coefficient less than -10 dB over the proposed band. The antenna has a fan beam radiation pattern with 3 dB beamwidth of 9 degrees in the E-plane and 66 degrees in the H-plane. The calculated gain of the proposed antenna is 15.4 dBi. The pulse dispersion effect is quantified by calculating the pulse fidelity factor (PFF) of a transmitted pulse having 500 MHz bandwidth with a center frequency of 28 GHz. The designed antenna exhibits more than 0.9 fidelity factor value, which makes it suitable for wireless data communication systems.
{"title":"Design and analysis of millimeter wave series fed microstrip patch array for next generation wireless communication systems","authors":"Abdullah Alomar, S. Al-Saif, M. Ashraf, S. Alshebeili","doi":"10.1109/ANTEM.2016.7550139","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550139","url":null,"abstract":"A Millimeter-wave series-fed microstrip patch array antenna that operates over the band 27.6 GHz to 30 GHz is presented in this paper. The designed antenna shows a reflection coefficient less than -10 dB over the proposed band. The antenna has a fan beam radiation pattern with 3 dB beamwidth of 9 degrees in the E-plane and 66 degrees in the H-plane. The calculated gain of the proposed antenna is 15.4 dBi. The pulse dispersion effect is quantified by calculating the pulse fidelity factor (PFF) of a transmitted pulse having 500 MHz bandwidth with a center frequency of 28 GHz. The designed antenna exhibits more than 0.9 fidelity factor value, which makes it suitable for wireless data communication systems.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133859340","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550200
David C. Garrett, B. Besler, J. Bourqui, E. Fear
Estimating the dielectric properties of biological tissues at microwave frequencies is of interest for numerous applications. Conventional coaxial probe methods perform local measurements which are of limited use for heterogeneous or layered materials common in biological tissues. To overcome this, a dedicated antenna system and calibration technique capable of estimating bulk dielectric properties of biological tissues has been developed. Dielectric properties of heterogeneous ex vivo biological tissues were estimated using the antenna system.
{"title":"Estimating bulk dielectric properties of biological tissues at microwave frequencies","authors":"David C. Garrett, B. Besler, J. Bourqui, E. Fear","doi":"10.1109/ANTEM.2016.7550200","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550200","url":null,"abstract":"Estimating the dielectric properties of biological tissues at microwave frequencies is of interest for numerous applications. Conventional coaxial probe methods perform local measurements which are of limited use for heterogeneous or layered materials common in biological tissues. To overcome this, a dedicated antenna system and calibration technique capable of estimating bulk dielectric properties of biological tissues has been developed. Dielectric properties of heterogeneous ex vivo biological tissues were estimated using the antenna system.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124207716","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550124
A. Semenikhin, D. Semenikhina, A. Klimov, Y. Yukhanov
Radar cross section (RCS) reduction using binary structures with non-equidistant matrix arrangement of modules and anisotropic impedance metasurface is presented. The block principle of construction of the binary structures is proposed. Monostatic RCS is reduced on co-polarizations on 15...20 dB in the band 8...16 GHz. Bistatic RCS patterns have no diffraction lobes on co-polarizations. The diffraction lobes on the cross-polarizations in the diagonal planes are lower on 12...29 dB than for the anisotropic chessboard.
{"title":"RCS reduction using nonabsorptive binary structures with anisotropic impedance metasurface","authors":"A. Semenikhin, D. Semenikhina, A. Klimov, Y. Yukhanov","doi":"10.1109/ANTEM.2016.7550124","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550124","url":null,"abstract":"Radar cross section (RCS) reduction using binary structures with non-equidistant matrix arrangement of modules and anisotropic impedance metasurface is presented. The block principle of construction of the binary structures is proposed. Monostatic RCS is reduced on co-polarizations on 15...20 dB in the band 8...16 GHz. Bistatic RCS patterns have no diffraction lobes on co-polarizations. The diffraction lobes on the cross-polarizations in the diagonal planes are lower on 12...29 dB than for the anisotropic chessboard.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114916187","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550238
M. R. Chaharmir, J. Ethier, D. Lee, J. Shaker
Design, fabrication and measurement of a special class of engineered surfaces known as frequency selective surfaces (FSSs) is presented in this paper. These FSSs are designed to block the transmission of Wi-Fi signals (2.4 GHz and 5.3 GHz bands) while allowing other portions of the RF spectrum to pass unaffected. Inkjet printing is used to fabricate the FSSs, the details of which will be presented at the conference..
{"title":"Design of dual-band frequency selective surfaces to block Wi-Fi using printable electronics technology","authors":"M. R. Chaharmir, J. Ethier, D. Lee, J. Shaker","doi":"10.1109/ANTEM.2016.7550238","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550238","url":null,"abstract":"Design, fabrication and measurement of a special class of engineered surfaces known as frequency selective surfaces (FSSs) is presented in this paper. These FSSs are designed to block the transmission of Wi-Fi signals (2.4 GHz and 5.3 GHz bands) while allowing other portions of the RF spectrum to pass unaffected. Inkjet printing is used to fabricate the FSSs, the details of which will be presented at the conference..","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"172 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117342943","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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