Pub Date : 2015-10-26DOI: 10.1109/APS.2015.7305037
M. Abdallah, J. Costantine, A. Ramadan, Y. Tawk, F. Ayoub, C. Christodoulou, K. Kabalan
In this paper, a wide power range RF energy harvesting circuit is presented. The proposed idea is based on optimizing the performance of the contained Schottky diodes, while considering their built-in potential, breakdown voltage and variable impedance properties. The carried out analysis revealed a greater than 50% RF-to-DC conversion efficiency over a wide range of input power extending from -10 to 8.5 dBm. The proposed design is suitable for ambient RF energy harvesting applications, where the received RF signals undergo an abrupt variation of power level.
{"title":"Wide power range RF energy harvesting circuit","authors":"M. Abdallah, J. Costantine, A. Ramadan, Y. Tawk, F. Ayoub, C. Christodoulou, K. Kabalan","doi":"10.1109/APS.2015.7305037","DOIUrl":"https://doi.org/10.1109/APS.2015.7305037","url":null,"abstract":"In this paper, a wide power range RF energy harvesting circuit is presented. The proposed idea is based on optimizing the performance of the contained Schottky diodes, while considering their built-in potential, breakdown voltage and variable impedance properties. The carried out analysis revealed a greater than 50% RF-to-DC conversion efficiency over a wide range of input power extending from -10 to 8.5 dBm. The proposed design is suitable for ambient RF energy harvesting applications, where the received RF signals undergo an abrupt variation of power level.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125825512","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 : 2015-10-26DOI: 10.1109/APS.2015.7304804
A. Ibrahim, M. Abdalla, Xianjun Huang, Zhirun Hu
This paper presents design of compact tunable dual band asymmetric coplanar strip -fed monopole antenna based on graphene sheet. The proposed antenna is consisted of ACS-fed folded monopole antenna with inverted two L branches which achieve very compact size. The proposed antenna is operated at 2.4 GHz and 5.8 GHz which is used for wireless applications. The graphene sheet is used to achieve the desired tunability. The resonance frequency of the antenna can be electrically tuned by applying DC voltage to the graphene sheet which changes chemical potential of this sheet. The Details of the antenna design and simulation results are presented and discussed. The proposed antenna shows nearly omnidirectional radiation characteristics.
{"title":"Compact and tunable ACS-Fed monopole antenna","authors":"A. Ibrahim, M. Abdalla, Xianjun Huang, Zhirun Hu","doi":"10.1109/APS.2015.7304804","DOIUrl":"https://doi.org/10.1109/APS.2015.7304804","url":null,"abstract":"This paper presents design of compact tunable dual band asymmetric coplanar strip -fed monopole antenna based on graphene sheet. The proposed antenna is consisted of ACS-fed folded monopole antenna with inverted two L branches which achieve very compact size. The proposed antenna is operated at 2.4 GHz and 5.8 GHz which is used for wireless applications. The graphene sheet is used to achieve the desired tunability. The resonance frequency of the antenna can be electrically tuned by applying DC voltage to the graphene sheet which changes chemical potential of this sheet. The Details of the antenna design and simulation results are presented and discussed. The proposed antenna shows nearly omnidirectional radiation characteristics.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128455120","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 : 2015-10-26DOI: 10.1109/APS.2015.7304900
T. Ma, Wen-Jiao Liao, Shih-Yuan Chen, Tzong-Lin Wu, Reey-Beei Wu, H. Hsu, S. Peng, Zuo‐Min Tsai, Yi-Hsin Pang, Hui-Hung Yu, Juo-Ming Tu, H. Lin
Being aware of students' decreasing interest in electromagnetics (EM) in past years, volunteer professors in Taiwan initiate a nationwide program to re-emphasize the role of electromagnetics as a core course in electrical engineering. The main mission of the program is to increase students' motivation and confidence when studying the fundamentals of electromagnetics. Preliminary outcomes including open courseware, digital platform, tutorial animation, and creative laboratory are briefly introduced in this paper.
{"title":"SAVE and iEMPT: The EM revitalization program in Taiwan","authors":"T. Ma, Wen-Jiao Liao, Shih-Yuan Chen, Tzong-Lin Wu, Reey-Beei Wu, H. Hsu, S. Peng, Zuo‐Min Tsai, Yi-Hsin Pang, Hui-Hung Yu, Juo-Ming Tu, H. Lin","doi":"10.1109/APS.2015.7304900","DOIUrl":"https://doi.org/10.1109/APS.2015.7304900","url":null,"abstract":"Being aware of students' decreasing interest in electromagnetics (EM) in past years, volunteer professors in Taiwan initiate a nationwide program to re-emphasize the role of electromagnetics as a core course in electrical engineering. The main mission of the program is to increase students' motivation and confidence when studying the fundamentals of electromagnetics. Preliminary outcomes including open courseware, digital platform, tutorial animation, and creative laboratory are briefly introduced in this paper.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129350381","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 : 2015-10-26DOI: 10.1109/APS.2015.7305096
A. Çelebi, T. Wong, M. Kenkel
A Transverse Bilateral Helical antenna with bifilar winding (TBHB) for bandwidth enhancement is presented. A second helical ribbon is placed parallel to the helical ribbon of the TBH antenna with a certain separation. The two helices are joined at the central feed point where they are attached to a monopole. The two helices are shorted at a different location sideways along each branch for matching purposes. With this structure a secondary resonance is achieved close to the first one for increased bandwidth and increased input resistance at resonance with step-up configuration. The structural dimensions are chosen to be electrically small to meet with the compactness required in portable wireless devices such as handheld and body worn transmitters and monitoring receivers used in stage performances. Performance of the antenna structure is evaluated using finite element method (FEM) electromagnetic simulations. Comparison of TBHB antenna with the conventional TBH antenna and TBH antenna with parasitic element (TBHP) reported earlier showed that the new structure has a bandwidth significantly larger than the prior and comparable to the latter.
{"title":"Bifilar Transverse Bilateral Helical antenna for bandwidth enhancement","authors":"A. Çelebi, T. Wong, M. Kenkel","doi":"10.1109/APS.2015.7305096","DOIUrl":"https://doi.org/10.1109/APS.2015.7305096","url":null,"abstract":"A Transverse Bilateral Helical antenna with bifilar winding (TBHB) for bandwidth enhancement is presented. A second helical ribbon is placed parallel to the helical ribbon of the TBH antenna with a certain separation. The two helices are joined at the central feed point where they are attached to a monopole. The two helices are shorted at a different location sideways along each branch for matching purposes. With this structure a secondary resonance is achieved close to the first one for increased bandwidth and increased input resistance at resonance with step-up configuration. The structural dimensions are chosen to be electrically small to meet with the compactness required in portable wireless devices such as handheld and body worn transmitters and monitoring receivers used in stage performances. Performance of the antenna structure is evaluated using finite element method (FEM) electromagnetic simulations. Comparison of TBHB antenna with the conventional TBH antenna and TBH antenna with parasitic element (TBHP) reported earlier showed that the new structure has a bandwidth significantly larger than the prior and comparable to the latter.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130642288","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 : 2015-10-26DOI: 10.1109/APS.2015.7305515
A. Borja, J. Kelly
The ultimate aim of the research, presented in this paper, is to create a block of hardware which can be reconfigured to assume any given circuit function (e.g. filter, coupler, antenna, etc). Ultimately the hardware should be capable of performing those functions over any given bandwidth and at any required frequency. In essence what we have described is the microwave equivalent of a Field Programmable Gate Array (FPGA). This paper presents an early step toward the development of this technology. Specifically the paper describes a 3 port device, based around a single resonant element; namely a triangular microstrip patch. The device incorporates 7 microwave switches. These switches enable the device to be reconfigured between two different modes, namely narrowband antenna and 2-pole bandpass filter. Filter mode performance is obtained between ports 1 and 2. Antenna mode performance is obtained on port 3.
{"title":"Reconfigurable microwave circuit based on a single triangular microstrip patch","authors":"A. Borja, J. Kelly","doi":"10.1109/APS.2015.7305515","DOIUrl":"https://doi.org/10.1109/APS.2015.7305515","url":null,"abstract":"The ultimate aim of the research, presented in this paper, is to create a block of hardware which can be reconfigured to assume any given circuit function (e.g. filter, coupler, antenna, etc). Ultimately the hardware should be capable of performing those functions over any given bandwidth and at any required frequency. In essence what we have described is the microwave equivalent of a Field Programmable Gate Array (FPGA). This paper presents an early step toward the development of this technology. Specifically the paper describes a 3 port device, based around a single resonant element; namely a triangular microstrip patch. The device incorporates 7 microwave switches. These switches enable the device to be reconfigured between two different modes, namely narrowband antenna and 2-pole bandpass filter. Filter mode performance is obtained between ports 1 and 2. Antenna mode performance is obtained on port 3.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124185705","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 : 2015-10-26DOI: 10.1109/APS.2015.7305510
N. Honma, Takuma Ito, Y. Tsunekawa, K. Nishimori
In this paper, the frequency sharing technique between existing TV and new wireless communication systems are discussed. By adding a load modulation function to TV receiver antenna, the secondary system, i.e. new wireless communication system, can identify the interference channel between secondary system and primary TV receiver. The simulation has been carried out and it is found that the fairly high capacity is obtained even though the secondary system needs to suppress the interference to primary TV receiver.
{"title":"Can TV and communication system coexist in same frequency band? Applying back-scattering technique to TV receiver antenna","authors":"N. Honma, Takuma Ito, Y. Tsunekawa, K. Nishimori","doi":"10.1109/APS.2015.7305510","DOIUrl":"https://doi.org/10.1109/APS.2015.7305510","url":null,"abstract":"In this paper, the frequency sharing technique between existing TV and new wireless communication systems are discussed. By adding a load modulation function to TV receiver antenna, the secondary system, i.e. new wireless communication system, can identify the interference channel between secondary system and primary TV receiver. The simulation has been carried out and it is found that the fairly high capacity is obtained even though the secondary system needs to suppress the interference to primary TV receiver.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126634588","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 : 2015-10-26DOI: 10.1109/APS.2015.7305640
W. M. Dorsey, A. Zaghloul
An array analysis technique is presented that uses nine embedded element patterns to approximate all embedded element patterns. The hybrid technique avoids shortcomings of other common approaches that use a single embedded element approximation, while also providing significant time/computational savings compared to exact approaches including simulations and/or measurements of all embedded element patterns. The technique is then applied to an array of dual-circularly polarized antenna elements.
{"title":"Hybrid array pattern calculation technique","authors":"W. M. Dorsey, A. Zaghloul","doi":"10.1109/APS.2015.7305640","DOIUrl":"https://doi.org/10.1109/APS.2015.7305640","url":null,"abstract":"An array analysis technique is presented that uses nine embedded element patterns to approximate all embedded element patterns. The hybrid technique avoids shortcomings of other common approaches that use a single embedded element approximation, while also providing significant time/computational savings compared to exact approaches including simulations and/or measurements of all embedded element patterns. The technique is then applied to an array of dual-circularly polarized antenna elements.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116045496","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 : 2015-10-26DOI: 10.1109/APS.2015.7304709
Sébastien Clauzier, S. Mikki, Y. Antar
We present an overview of a method for designing near-field focusing systems, where distributions of electrically-small antennas are used as the source. The technique proposed here relies on recent progress in the theoretical understanding of the relation between the far and near fields of generic antennas, where it is suggested that the entire exterior-domain near field can be reconstructed from far-field data. The present paper provides a brief description of the method and proof of concept via an example.
{"title":"A new approach for near-field synthesis","authors":"Sébastien Clauzier, S. Mikki, Y. Antar","doi":"10.1109/APS.2015.7304709","DOIUrl":"https://doi.org/10.1109/APS.2015.7304709","url":null,"abstract":"We present an overview of a method for designing near-field focusing systems, where distributions of electrically-small antennas are used as the source. The technique proposed here relies on recent progress in the theoretical understanding of the relation between the far and near fields of generic antennas, where it is suggested that the entire exterior-domain near field can be reconstructed from far-field data. The present paper provides a brief description of the method and proof of concept via an example.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123965825","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 : 2015-10-26DOI: 10.1109/APS.2015.7304692
I. Ehrenberg, S. Sarma, Thomas Steffen, Bae-Ian Wu
Additive Manufacturing processes have matured in recent years and are now being applied to the rapid fabrication of functional electromagnetic structures and devices such as waveguides, antennae, and metamaterials. Key to a successful breakthrough into commercial viability for the industry is the incorporation of active RF elements. In this paper, we note some of the difficulties associated with including active elements within additively manufactured substrate designs, and report measurements from a microstrip transmission line with its transmission tuned by a voltage controlled analog phase shifter embedded within a 3D printed substrate. The results indicate that while active elements can be incorporated, performance could be improved by certain design and fabrication changes.
{"title":"Incorporation of active RF circuit elements into additively manufactured substrates","authors":"I. Ehrenberg, S. Sarma, Thomas Steffen, Bae-Ian Wu","doi":"10.1109/APS.2015.7304692","DOIUrl":"https://doi.org/10.1109/APS.2015.7304692","url":null,"abstract":"Additive Manufacturing processes have matured in recent years and are now being applied to the rapid fabrication of functional electromagnetic structures and devices such as waveguides, antennae, and metamaterials. Key to a successful breakthrough into commercial viability for the industry is the incorporation of active RF elements. In this paper, we note some of the difficulties associated with including active elements within additively manufactured substrate designs, and report measurements from a microstrip transmission line with its transmission tuned by a voltage controlled analog phase shifter embedded within a 3D printed substrate. The results indicate that while active elements can be incorporated, performance could be improved by certain design and fabrication changes.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129699921","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 : 2015-10-26DOI: 10.1109/APS.2015.7305094
M. Hosseini, D. Klymyshyn
This paper presents a highly efficient and miniature planar electromagnetic bandgap (EBG) antenna with circularly polarized (CP) radiation. The antenna building blocks are the high aspect ratio (HAR) EBG cells recently introduced in literature, nine (3×3) of which are deployed in both lateral dimensions. As the top metal layer of this EBG surface is symmetrical, it simultaneously accommodates two orthogonal E-field components, excited by two microstriplines attached to the corners. A compact simplified shifter/power divider provides quadrature phase difference and equal power at feed points, enabling the structure to generate a broadside CP radiation pattern. Thanks to the natural capability of EBG cells, the low loss nature of HAR metal traces, and high capacitive coupling of gaps, this work features a planar CP antenna with dimensions as small as 0.26λ×0.29λ×λ/23 and efficiency as high as 94.3%.
{"title":"A compact high-efficiency circularly polarized antenna with thick EBG cells and integrated power divider/phase shifter","authors":"M. Hosseini, D. Klymyshyn","doi":"10.1109/APS.2015.7305094","DOIUrl":"https://doi.org/10.1109/APS.2015.7305094","url":null,"abstract":"This paper presents a highly efficient and miniature planar electromagnetic bandgap (EBG) antenna with circularly polarized (CP) radiation. The antenna building blocks are the high aspect ratio (HAR) EBG cells recently introduced in literature, nine (3×3) of which are deployed in both lateral dimensions. As the top metal layer of this EBG surface is symmetrical, it simultaneously accommodates two orthogonal E-field components, excited by two microstriplines attached to the corners. A compact simplified shifter/power divider provides quadrature phase difference and equal power at feed points, enabling the structure to generate a broadside CP radiation pattern. Thanks to the natural capability of EBG cells, the low loss nature of HAR metal traces, and high capacitive coupling of gaps, this work features a planar CP antenna with dimensions as small as 0.26λ×0.29λ×λ/23 and efficiency as high as 94.3%.","PeriodicalId":242998,"journal":{"name":"2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125352346","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：