Pub Date : 2013-03-04DOI: 10.1109/IWAT.2013.6518374
S. Best
In this paper we discuss antenna correlation coefficient and its application in a two-element receiving antenna system within a simple multipath rich environment. We conjecture here, that in general, the antenna correlation coefficient does not necessarily provide an accurate estimation of how well or how poorly a multiple antenna receiving system will perform in a multipath rich environment. In general, the reliability of the communication channel is as much if not more a function of the multipath environment and the choice of diversity scheme or MIMO implementation, factors that the antenna correlation coefficient do not characterize. We consider the performance of a two-element antenna system in a simple multipath rich environment as part of this discussion. Finally, we discuss the significance of the antenna correlation coefficient when two receiving antennas are closely spaced and may be highly coupled.
{"title":"Discussion of two-element antenna correlation coefficient and received waveform correlation in a simple multipath environment","authors":"S. Best","doi":"10.1109/IWAT.2013.6518374","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518374","url":null,"abstract":"In this paper we discuss antenna correlation coefficient and its application in a two-element receiving antenna system within a simple multipath rich environment. We conjecture here, that in general, the antenna correlation coefficient does not necessarily provide an accurate estimation of how well or how poorly a multiple antenna receiving system will perform in a multipath rich environment. In general, the reliability of the communication channel is as much if not more a function of the multipath environment and the choice of diversity scheme or MIMO implementation, factors that the antenna correlation coefficient do not characterize. We consider the performance of a two-element antenna system in a simple multipath rich environment as part of this discussion. Finally, we discuss the significance of the antenna correlation coefficient when two receiving antennas are closely spaced and may be highly coupled.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114853967","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518331
M. Ando, J. Hirokawa, M. Zhang, J. Asano, K. Sakurai, H. Nakano, Y. Hirachi, R. Suga, M. Noda, T. Taniguchi
This paper reviews the development of planar antennas to be implemented in millimeter wave systems, which have been conducted in the series of project “the research and development project for expansion of radio spectrum resources” of the Ministry of Internal Affairs and Communications(MIC), Japan.
{"title":"High efficiency planar antennas implemented in millimeter wave systems","authors":"M. Ando, J. Hirokawa, M. Zhang, J. Asano, K. Sakurai, H. Nakano, Y. Hirachi, R. Suga, M. Noda, T. Taniguchi","doi":"10.1109/IWAT.2013.6518331","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518331","url":null,"abstract":"This paper reviews the development of planar antennas to be implemented in millimeter wave systems, which have been conducted in the series of project “the research and development project for expansion of radio spectrum resources” of the Ministry of Internal Affairs and Communications(MIC), Japan.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"5a 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128201308","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518372
Y. Guo, J. Gómez-Tornero
Together with their colleagues, the authors have been working on reconfigurable leaky-wave antennas using the Fabry-Perot structure [1, 2]. By employing a partially reflective surface at the top and a tuneable high impedance surface at the bottom, an electronically scanned beam can be produced. The paper presents an overview of our theoretical and experimental results on reconfigurable 10 LWAs, and reports our latest findings and potential future applications.
{"title":"Reconfigurable Fabry-Pérot Leaky-Wave Antennas","authors":"Y. Guo, J. Gómez-Tornero","doi":"10.1109/IWAT.2013.6518372","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518372","url":null,"abstract":"Together with their colleagues, the authors have been working on reconfigurable leaky-wave antennas using the Fabry-Perot structure [1, 2]. By employing a partially reflective surface at the top and a tuneable high impedance surface at the bottom, an electronically scanned beam can be produced. The paper presents an overview of our theoretical and experimental results on reconfigurable 10 LWAs, and reports our latest findings and potential future applications.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124349811","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518326
R. Ziolkowski, M. Tang, Ning Zhu
Non-Foster element-augmented, electrically small electric and magnetic antennas have been designed, characterized numerically, fabricated and tested. Internal non-Foster elements, which produce specifically tailored broad bandwidth inductive and capacitive devices, are introduced into the near-field resonant parasitic (NFRP) components of their narrow bandwidth counter-parts. This internal non-Foster element approach leads to nearly complete matching of the entire system to a 50 Ω source without any matching network and high radiation efficiencies over a FBW10dB bandwidth that surpasses the fundamental passive bound. By including additional parasitic elements, one can also enhance the directivity of the original passive NFRP antenna. Further augmenting such a parasitic element with a non-Foster element, one can additionally achieve a large directivity bandwidth. A 300 MHz design with ka = 0.94 is reported which simultaneously achieves high radiation efficiencies (>81.63%), high directivities (> 6.25 dB) and large front-to-back-ratios (> 26.71 dB) over a 10.0% fractional bandwidth.
{"title":"Progress towards an electrically small antenna with high efficiency and large bandwidth simultaneously with high directivity and a large front-to-back ratio","authors":"R. Ziolkowski, M. Tang, Ning Zhu","doi":"10.1109/IWAT.2013.6518326","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518326","url":null,"abstract":"Non-Foster element-augmented, electrically small electric and magnetic antennas have been designed, characterized numerically, fabricated and tested. Internal non-Foster elements, which produce specifically tailored broad bandwidth inductive and capacitive devices, are introduced into the near-field resonant parasitic (NFRP) components of their narrow bandwidth counter-parts. This internal non-Foster element approach leads to nearly complete matching of the entire system to a 50 Ω source without any matching network and high radiation efficiencies over a FBW10dB bandwidth that surpasses the fundamental passive bound. By including additional parasitic elements, one can also enhance the directivity of the original passive NFRP antenna. Further augmenting such a parasitic element with a non-Foster element, one can additionally achieve a large directivity bandwidth. A 300 MHz design with ka = 0.94 is reported which simultaneously achieves high radiation efficiencies (>81.63%), high directivities (> 6.25 dB) and large front-to-back-ratios (> 26.71 dB) over a 10.0% fractional bandwidth.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123661317","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518298
A. Cihangir, F. Ferrero, C. Luxey, G. Jacquemod
A space-efficient capacitive coupling element antenna which covers the Wireless Wide Area Network (WWAN) low and high bands from 700 to 960MHz (LTE700&GSM850/900) and 1.7 to 2.7 GHz (DCS/PCS, UMTS, WLAN2400, LTE2500) is presented here. The main difference of this novel antenna structure versus the plain coupling element antennas is its hollowed structure: the main metal plate of the CE have been made hollow to be more space efficient and leave space for other radiators or electronic components. The design can be divided in two main steps. Firstly, a metal strip of 1mm width is used to excite the currents over the system ground plane which is the dominant radiation mechanism at low frequency. Then, the saved space is used to accommodate a higher-band antenna to cover 1.7-2.7GHz still keeping a high isolation between the two feeds. The low-band performance of the antenna is supplemented with the measurement results obtaining a total efficiency higher than 50% between 700-960MHz which is a very competitive value when compared to today's handheld mobile communication device antennas.
{"title":"A space-efficient coupling element antenna for WWAN applications","authors":"A. Cihangir, F. Ferrero, C. Luxey, G. Jacquemod","doi":"10.1109/IWAT.2013.6518298","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518298","url":null,"abstract":"A space-efficient capacitive coupling element antenna which covers the Wireless Wide Area Network (WWAN) low and high bands from 700 to 960MHz (LTE700&GSM850/900) and 1.7 to 2.7 GHz (DCS/PCS, UMTS, WLAN2400, LTE2500) is presented here. The main difference of this novel antenna structure versus the plain coupling element antennas is its hollowed structure: the main metal plate of the CE have been made hollow to be more space efficient and leave space for other radiators or electronic components. The design can be divided in two main steps. Firstly, a metal strip of 1mm width is used to excite the currents over the system ground plane which is the dominant radiation mechanism at low frequency. Then, the saved space is used to accommodate a higher-band antenna to cover 1.7-2.7GHz still keeping a high isolation between the two feeds. The low-band performance of the antenna is supplemented with the measurement results obtaining a total efficiency higher than 50% between 700-960MHz which is a very competitive value when compared to today's handheld mobile communication device antennas.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121842516","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518333
L. Dussopt, José A. Zevallos Luna, A. Siligaris
A novel cost-efficient antenna solution for millimeter-wave multi-Gbps wireless communications operating over ranges above 10-20 meters in fixed Line-Of-Sight (LOS) configuration is presented. A first antenna element is integrated on-chip with a CMOS-SOI 60-GHz transceiver circuit in order to benefit from minimum interconnection losses between the front-end circuit and the antenna. This antenna is coupled to an external radiating element embedded in a standard QFN package, enabling an improved radiation gain of 4-6 dBi. Finally, a discrete-lens antenna array fabricated on standard laminate materials is placed above the packaged transceiver in order to focus the radiated beam and reach a gain in excess of 14 dBi.
{"title":"On-chip/in-package integrated antenna for millimeter-wave medium and long-range applications","authors":"L. Dussopt, José A. Zevallos Luna, A. Siligaris","doi":"10.1109/IWAT.2013.6518333","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518333","url":null,"abstract":"A novel cost-efficient antenna solution for millimeter-wave multi-Gbps wireless communications operating over ranges above 10-20 meters in fixed Line-Of-Sight (LOS) configuration is presented. A first antenna element is integrated on-chip with a CMOS-SOI 60-GHz transceiver circuit in order to benefit from minimum interconnection losses between the front-end circuit and the antenna. This antenna is coupled to an external radiating element embedded in a standard QFN package, enabling an improved radiation gain of 4-6 dBi. Finally, a discrete-lens antenna array fabricated on standard laminate materials is placed above the packaged transceiver in order to focus the radiated beam and reach a gain in excess of 14 dBi.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125301994","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518289
H. Arai, K. Abe, N. Takemura, T. Mitsui
To achieve dual-polarized switched beam antenna, this paper proposes an orthogonal patch array with analog phase shifter. The proposed antenna is used for an indoor base station antenna of LTE. Its feeding circuit consists of a pair of analog phase shifters using varactor diodes to control the output phase independently. A prototype antenna provides dual polarized ±15° beam switching in both E and H planes.
{"title":"Dual-polarized switched beam antenna with variable phase shifter","authors":"H. Arai, K. Abe, N. Takemura, T. Mitsui","doi":"10.1109/IWAT.2013.6518289","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518289","url":null,"abstract":"To achieve dual-polarized switched beam antenna, this paper proposes an orthogonal patch array with analog phase shifter. The proposed antenna is used for an indoor base station antenna of LTE. Its feeding circuit consists of a pair of analog phase shifters using varactor diodes to control the output phase independently. A prototype antenna provides dual polarized ±15° beam switching in both E and H planes.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130405051","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518296
Y. Ranga, L. Matekovits, S. Hay, T. Bird
A transmission polarizer is described that is based on an anisotropic impedance surfaces to convert the incident linearly polarized wave to a circularly polarized one. The polarizer is based on a frequency selective surface (FSS) with two concentric rings having cuts at different orientations/angles. By virtue of anisotropy it is possible to independently control the transmission characteristics of two orthogonal linearly polarized incident plane waves and therefore to achieve polarization conversion in the transmission direction. A unit cell approach with periodic boundary conditions is considered in the design environment; this unit cell incorporates the two concentric rings. The proposed topology supports in achieving dual-band polarization conversion, which has advantages over previously reported designs. The polarizer works at 27.2 GHz and 39.5 GHz and provides the required 90° phase difference between the two orthogonal components, which are equal in magnitude. The structure provides around 99% polarization purity at resonance. The linear performance of this new structure is described through results of numerical simulations.
{"title":"An anisotropic impedance surface for dual-band linear-to-circular transmission polarization convertor","authors":"Y. Ranga, L. Matekovits, S. Hay, T. Bird","doi":"10.1109/IWAT.2013.6518296","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518296","url":null,"abstract":"A transmission polarizer is described that is based on an anisotropic impedance surfaces to convert the incident linearly polarized wave to a circularly polarized one. The polarizer is based on a frequency selective surface (FSS) with two concentric rings having cuts at different orientations/angles. By virtue of anisotropy it is possible to independently control the transmission characteristics of two orthogonal linearly polarized incident plane waves and therefore to achieve polarization conversion in the transmission direction. A unit cell approach with periodic boundary conditions is considered in the design environment; this unit cell incorporates the two concentric rings. The proposed topology supports in achieving dual-band polarization conversion, which has advantages over previously reported designs. The polarizer works at 27.2 GHz and 39.5 GHz and provides the required 90° phase difference between the two orthogonal components, which are equal in magnitude. The structure provides around 99% polarization purity at resonance. The linear performance of this new structure is described through results of numerical simulations.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128344874","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518348
A. Mali, R. J. Hadi, M. M. Khan, C. Sandhagen, A. Bangert
Metamaterial superstrate and slotted technique has been shown to affect antenna bandwidth and gain. This project investigated slot technique and metamaterial superstrate. The slot technique was used to enhance antenna bandwidth. Metamaterial superstrate was used to enhance bandwidth and narrow beamwidth. The gain has been improved by around 4 dB. The antenna including metamaterial shows a by 25 % wider bandwidth.
{"title":"Enhancement of X band planar antenna parameters with zero index metamaterial","authors":"A. Mali, R. J. Hadi, M. M. Khan, C. Sandhagen, A. Bangert","doi":"10.1109/IWAT.2013.6518348","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518348","url":null,"abstract":"Metamaterial superstrate and slotted technique has been shown to affect antenna bandwidth and gain. This project investigated slot technique and metamaterial superstrate. The slot technique was used to enhance antenna bandwidth. Metamaterial superstrate was used to enhance bandwidth and narrow beamwidth. The gain has been improved by around 4 dB. The antenna including metamaterial shows a by 25 % wider bandwidth.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134096713","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518285
Peter Russer, J. Russer, F. Mukhtar, Paolo Lugli, S. Wane, D. Bajon, W. Porod
Silicon-based monolithic integrated millimeterwave circuits today facilitate the realization of millimeterwave communication and sensing systems [1], [2]. Monolithic integration of antennas into transmitter and receiver front ends reduces weight and costs of millimeterwave systems [3]. As the structure size of circuit devices and components is continuously decreasing the same will hold true for antennas and radiation elements used in integrated circuits for on-chip and chip-to-chip communication. An interesting option to overcome the bandwidth limitations for signal transmission on or between monolithic integrated circuits is wireless chip-to-chip and on-chip interconnects via integrated antennas. Instead of dedicating chip area for the antenna, the antenna can make use of the available on-chip metallization. Antenna-coupled thermal sensors offer a unique choice for infrared detection applications. A considerable size reduction of integrated antenna structures may be achieved using carbon nanotubes and graphene as the antenna material. Plasmonic nanostructures allow realizing ultra small antenna structures for detection applications.
{"title":"Integrated antennas for RF sensing, wireless communications and energy harvesting applications","authors":"Peter Russer, J. Russer, F. Mukhtar, Paolo Lugli, S. Wane, D. Bajon, W. Porod","doi":"10.1109/IWAT.2013.6518285","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518285","url":null,"abstract":"Silicon-based monolithic integrated millimeterwave circuits today facilitate the realization of millimeterwave communication and sensing systems [1], [2]. Monolithic integration of antennas into transmitter and receiver front ends reduces weight and costs of millimeterwave systems [3]. As the structure size of circuit devices and components is continuously decreasing the same will hold true for antennas and radiation elements used in integrated circuits for on-chip and chip-to-chip communication. An interesting option to overcome the bandwidth limitations for signal transmission on or between monolithic integrated circuits is wireless chip-to-chip and on-chip interconnects via integrated antennas. Instead of dedicating chip area for the antenna, the antenna can make use of the available on-chip metallization. Antenna-coupled thermal sensors offer a unique choice for infrared detection applications. A considerable size reduction of integrated antenna structures may be achieved using carbon nanotubes and graphene as the antenna material. Plasmonic nanostructures allow realizing ultra small antenna structures for detection applications.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115121227","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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