2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)最新文献

{"title":"Reconfigurable deployable antennas for space communications","authors":"J. Costantine, Y. Tawk, Christos G. Christodoulou","doi":"10.1109/IWAT.2014.6958623","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958623","url":null,"abstract":"This paper discusses the merging of reconfigurable and deployable antennas for satellite and space communications. Reconfigurable antennas, normally proposed for terrestrial applications, allow deployable antennas to be more adaptive and more capable to perform additional functions. In this paper, various antenna concepts that can deploy and at the same time possess frequency tuning capability are proposed for space communications. The addition of tuning ability allows a more efficient, selective and cognitive communication schemes.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122301438","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}

{"title":"New challenges in the design of electromagnetic communication systems","authors":"R. Mittra","doi":"10.1109/IWAT.2014.6958664","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958664","url":null,"abstract":"Summary form only given. Space exploration is an exciting scientific endeavor, and it has recently engendered considerable recent interest because of the success of the Mars mission, among others. We have been intrigued by the prospect of communicating with life in other planets, or at least finding their existence, even if in the form of microbes not visible to the naked eye. Although we have not really had any success in locating such life to-date, many scientists believe the chances are good that we will at least find living organisms, if not ET and his friends, sometime in not too distant a future. Thus our search for life in other planets and distant galaxies continues unabated. The success in this endeavor will depend squarely on our ability to meet the challenges of designing the sensors, and antennas which relay the information gathered by the sensors back down to earth, where they can be processed by astro-biophysicists, for instance. Of course we need to communicate not only in, and from, outer space, but also down on earth. There is no denying of the fact that today's children are growing up in the world of video games, twitter, Facebook and this, in turn, is fueling the need for data transfer, e.g., videos, at a very high data rate. An intriguing idea--that is not as far-fetched as one might think--is to communicate to the PlayStation on the computer, not in the usual way by manipulating the controller with our hands, but by using brain waves instead. Given this background, the talk will take a quick look at what is happening in this challenging world of communication with machines but not in the old-fashioned way like your parents did. Finally, it is evident that the world of communication today is exploding in more new directions that we ever even imagined a few years ago, when we were only communicating the “usual\" ways. This is because the scope of communication is growing rapidly, and new applications such as sensing and relaying of information in the context of healthcare and patient monitoring are coming into vogue. The talk will present some examples of new concepts in RF and Optical Communication, including those that might have a substantial impact on the exciting world of cyber communications of the future.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122326633","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}

{"title":"On the accuracy of the distance-averaging method for antenna gain measurements","authors":"D. Deacu, R. Tamas, T. Petrescu, I. Candel, Teodor Petrut","doi":"10.1109/IWAT.2014.6958689","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958689","url":null,"abstract":"We have previously proposed an indoor measuring technique for antenna gain, based on averaging a normalized transfer function over a distance range. Simulated and measured results have also been presented, in order to validate the method. In this paper, we assess the accuracy of our method by comparing the results to those issued from a traditional, non-anechoic approach, i.e., the time-gating method, as well as from measurements inside an anechoic chamber. A good agreement between the results issued from the three techniques was noted. Further, it appears that measurements in the intermediate-field region are also possible with the distance averaging method.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"2009 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125639029","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}

{"title":"Diffraction loss and phase modulation of terrestrial radio-link by wind turbine","authors":"T. Fickenscher, M. B. Raza","doi":"10.1109/IWAT.2014.6958692","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958692","url":null,"abstract":"Coexistence of wind farms and terrestrial radio links require the investigation of suitable exclusion zones. A proper analysis of this interference including the effect of diffraction is very difficult by numerical field simulation as the problem is electrically extremely large. We propose and analyze a simple diffraction model for a wind turbine (WT) based on a one-dimensional Fresnel diffraction approach applied to tower and rotor. For the first time the dynamic behavior of the diffraction caused by the rotor blades has been investigated.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130044614","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}

{"title":"Ultrasonic radar sensor installed in sensor network for care environment — Technique Advanced from millimeter-wave radar","authors":"M. Hikita, Tateo Sato","doi":"10.1109/IWAT.2014.6958647","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958647","url":null,"abstract":"Based on similar technique used in millimeter-wave radar, we have proposed a novel ultrasonic measurement method. It provides information of moving objects, and can be installed in sensor network. In the future, these systems will be very useful in care environment to monitor the elderly or sick persons.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127153190","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}

{"title":"Non-foster augmentations of electrically small antennas: Practical design considerations and results","authors":"R. Ziolkowski","doi":"10.1109/IWAT.2014.6958578","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958578","url":null,"abstract":"Electrically small antennas (ESAs) have been a topic of much research interest in recent years because of their utility for a wide variety of wireless applications. They have been showcased at several of the iWAT events over the last decade. However, because of their compact size, ESAs are generally not efficient radiators, they have narrow bandwidths, and they have low directivities. I will review my group's contemporary efforts to overcome the conflicting performance characteristics of ESAs, including their efficiencies, bandwidths, and directivities, using various meta-structures.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127439289","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}

{"title":"Slotted waveguide antenna array using complimentary split ring resonator elements","authors":"A. Daliri, W. Rowe, K. Ghorbani","doi":"10.1109/IWAT.2014.6958682","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958682","url":null,"abstract":"This paper presents the design of a 4-element array of complimentary split ring resonators (CSRRs) cut on the broad-wall of a rectangular waveguide. CSRRs have not previously been used as elements of slotted waveguide antenna (SWA) arrays. The array design is based on the parametric study on the effect of CSRR geometrical parameters on the radiation characteristics. Simulated reflection properties and realized gain patterns of the proposed CSRR-SWA array are presented and compared to that of conventional half wavelength rectangular slots. The results demonstrate the feasibility of using CSRRs in SWA arrays. It is envisaged that CSRR-SWA array could be used in multifunctional load-bearing structures to improve mechanical performance, due to their smaller size compared to conventional array elements.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129029461","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}

{"title":"3D frequency selective surfaces with wideband response","authors":"S. Azemi, K. Ghorbani, W. Rowe","doi":"10.1109/IWAT.2014.6958641","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958641","url":null,"abstract":"A novel 3D Frequency Selective Surface (FSS) with horn shaped resonators is proposed which exhibits a very wide stop band. This new horn shaped resonator is a modification from a 3D FSS consisting of square cylinder unit elements. This feature introduces frequency-selective surfaces with the added advantage of lowering the sensitivity of the FSS frequency response with respect to the incidence angle. Simulation results prove that the FSS can realize broad selectivity of waves with the bandwidth more than 57%. The wideband transmission behavior is stable under oblique TM incidence angles from 0 to 80 degrees. The influence of various key parameters on 3D Horn Shape FSS characteristics has been investigated using the CST simulation software tool. By understanding the effect of each parameter, a comprehensive study for a better design of 3D Horn Shape FSS with wideband response is presented.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128017954","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}

{"title":"Effect of antenna bandwidth and placement on the robustness to user interaction","authors":"E. Buskgaard, A. Tatomirescu, S. C. del Barrio, O. Franek, G. Pedersen","doi":"10.1109/IWAT.2014.6958653","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958653","url":null,"abstract":"Modern smart phones require antenna systems that can deal with an ever-growing number of bands. This study compares two different approaches to the coverage of large bandwidths: Wide-band (WB) antennas covering a whole band at once and tunable narrow-band (NB) antennas covering only one channel at a time but tunable to all channels within the band of interest. To investigate the effect of antenna placement the antennas are placed both at the top and the bottom of the phone. All antenna configurations are simulated in talk position with a head and hand included. The hand is constructed with a movable index finger and the index finger is swept at 6 positions on the backside of the phone. The study shows that WB antennas detune a lot more than NB antennas and that top-mounted antennas are experiencing more than 6 dB higher losses than bottom-mounted antennas. It is proposed to expand this study with more antenna types and placements as both of these parameters are known to influence the immunity to the user. It is also proposed to compare the simulation results to measurements to increase the confidence in the results.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"453 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124297576","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}

{"title":"Circularly polarized high gain multiband antenna for non-linear junction detector system","authors":"In-hwan Kim, K. Min","doi":"10.1109/IWAT.2014.6958644","DOIUrl":"https://doi.org/10.1109/IWAT.2014.6958644","url":null,"abstract":"This paper proposes a design of multiband circular polarization patch array antennas for non-linear junction detector system application. A patch antenna with the inclined three slots, two rectangular grooves on circular disc patch, the asymmetric gap of the CPW feeding structure and the truncated corner of g round plane w as considered for circular polarization and broad bandwidth. In order to improve gain and to keep small size in array antennas, the optimized rectangular slot array located on common ground plane was designed. The calculated and the measured return loss and axial ratio of array antennas were showed good agreement. The higher gain of about 1 dBi was realized by using the common ground structure with the novel slot array to suppress mutual coupling.","PeriodicalId":337951,"journal":{"name":"2014 International Workshop on Antenna Technology: Small Antennas, Novel EM Structures and Materials, and Applications (iWAT)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115203785","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}