Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464645
R. Cruz, Adaildo G d'Assunao, P. H. da F Silva
This work presents a new proposal for Frequency Selective Surface (FSS) design for Ultra-Wideband (UWB) applications. The new FSSs consist of an array composed by the association of two patch elements per cell: a square loop and a crossed dipole. These structures are called Crossed Loops and have the objective of increasing the bandwidth of the square loop and the crossed dipole, when analyzed separately. Simulated results of the transmission coefficients are obtained using the Ansoft Designer¿ commercial software. Some of the FSSs tested were fabricated in order to make an experimental analysis with the measured results and to validate the new proposal. In particular, the presented results for the transmission coefficient of a built FSS prototype indicate a percent bandwidth 52.4%.
{"title":"A new FSS design proposal for UWB applications","authors":"R. Cruz, Adaildo G d'Assunao, P. H. da F Silva","doi":"10.1109/IWAT.2010.5464645","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464645","url":null,"abstract":"This work presents a new proposal for Frequency Selective Surface (FSS) design for Ultra-Wideband (UWB) applications. The new FSSs consist of an array composed by the association of two patch elements per cell: a square loop and a crossed dipole. These structures are called Crossed Loops and have the objective of increasing the bandwidth of the square loop and the crossed dipole, when analyzed separately. Simulated results of the transmission coefficients are obtained using the Ansoft Designer¿ commercial software. Some of the FSSs tested were fabricated in order to make an experimental analysis with the measured results and to validate the new proposal. In particular, the presented results for the transmission coefficient of a built FSS prototype indicate a percent bandwidth 52.4%.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132350566","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464745
Gregory Shimonov, K. Garb, R. Kastner
Implementations of wireless techniques call for low return and insertion losses and high slope selectivity of mm wave devices. Not many structures potentially satisfy all of the above criteria. In this work, diplexers with E-plane filters combined with an H-plane Y-junction splitter are investigated. The Y-junction configuration of the splitter is chosen based on its favorable S-parameter behavior. Filter analysis is facilitated using the mode matching technique (MMT). Based on this analysis, a band pass filter for the K band was built and tested. In order to integrate the filters with the Y-junction, the filters are positioned appropriately along the junction arms. The integrated filter-junction structure was then analyzed by an MMT code for the entire structure. An integrated diplexer model was built and tested, confirming the predicted performance based on the MMT.
{"title":"Mode matching analysis and design of waveguide E-plane filters and diplexers","authors":"Gregory Shimonov, K. Garb, R. Kastner","doi":"10.1109/IWAT.2010.5464745","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464745","url":null,"abstract":"Implementations of wireless techniques call for low return and insertion losses and high slope selectivity of mm wave devices. Not many structures potentially satisfy all of the above criteria. In this work, diplexers with E-plane filters combined with an H-plane Y-junction splitter are investigated. The Y-junction configuration of the splitter is chosen based on its favorable S-parameter behavior. Filter analysis is facilitated using the mode matching technique (MMT). Based on this analysis, a band pass filter for the K band was built and tested. In order to integrate the filters with the Y-junction, the filters are positioned appropriately along the junction arms. The integrated filter-junction structure was then analyzed by an MMT code for the entire structure. An integrated diplexer model was built and tested, confirming the predicted performance based on the MMT.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134206321","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464757
N. Aijaz, C. Orlenius, M. Franzén, M. Andersson
A reliable, repeatable and fast measurement procedure for a complete Multiple-Input-Multiple-Output (MIMO) Wireless Local Area Network (WLAN) system is presented. Application level throughput is presented as a performance metric to reflect the actual throughput delivered to the end user by a WLAN system. The employed technique involves the use of two reverberation chambers to cope with the real world scenario of low Signal to Noise Ratio (SNR) proximity and to effectively control the rank of a communication channel.
{"title":"Active throughput measurements for complete MIMO WLAN systems using dual reverberation chamber technique","authors":"N. Aijaz, C. Orlenius, M. Franzén, M. Andersson","doi":"10.1109/IWAT.2010.5464757","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464757","url":null,"abstract":"A reliable, repeatable and fast measurement procedure for a complete Multiple-Input-Multiple-Output (MIMO) Wireless Local Area Network (WLAN) system is presented. Application level throughput is presented as a performance metric to reflect the actual throughput delivered to the end user by a WLAN system. The employed technique involves the use of two reverberation chambers to cope with the real world scenario of low Signal to Noise Ratio (SNR) proximity and to effectively control the rank of a communication channel.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116855242","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464673
A. Rolland, R. Sauleau, C. Person, L. Le Coq, M. Drissi
We describe in this paper the synthesis of directive axis-symmetrical compact shaped horn antennas. The proposed CAD tool is based on the combination between a FDTD solver in cylindrical coordinates and a genetic algorithm. A low-cost fabrication technique using a metallized foam 3-D technology is employed for experimental validations in Ka-band. The measurement results are in excellent agreement with the numerical predictions. Radiation efficiencies up to 89% have been obtained at 29.5 GHz.
{"title":"Compact shaped horn antennas in metallized foam technology","authors":"A. Rolland, R. Sauleau, C. Person, L. Le Coq, M. Drissi","doi":"10.1109/IWAT.2010.5464673","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464673","url":null,"abstract":"We describe in this paper the synthesis of directive axis-symmetrical compact shaped horn antennas. The proposed CAD tool is based on the combination between a FDTD solver in cylindrical coordinates and a genetic algorithm. A low-cost fabrication technique using a metallized foam 3-D technology is employed for experimental validations in Ka-band. The measurement results are in excellent agreement with the numerical predictions. Radiation efficiencies up to 89% have been obtained at 29.5 GHz.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115006225","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464649
H. Chreim, M. Hajj, T. Monediere, B. Jecko
This paper presents an additional work on a previous EBG cylindrical antenna in order to conceive a steerable antenna for Radar applications which require the coverage of the horizontal plane with a high gain (higher than 25 dB). The already designed antenna provides 18 beams with 15 dBi of maximum directivity. That is why some modifications were applied on it in order to obtain more beams in the horizontal plane (30 beams) and increase its gain. Moreover, the theories of cylindrical arrays in the horizontal plane and the multi-feed in the vertical plane are used which allows further gain improvement and reaching the required one.
{"title":"Cylindrical array of EBG sectoral antennas for Radar applications","authors":"H. Chreim, M. Hajj, T. Monediere, B. Jecko","doi":"10.1109/IWAT.2010.5464649","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464649","url":null,"abstract":"This paper presents an additional work on a previous EBG cylindrical antenna in order to conceive a steerable antenna for Radar applications which require the coverage of the horizontal plane with a high gain (higher than 25 dB). The already designed antenna provides 18 beams with 15 dBi of maximum directivity. That is why some modifications were applied on it in order to obtain more beams in the horizontal plane (30 beams) and increase its gain. Moreover, the theories of cylindrical arrays in the horizontal plane and the multi-feed in the vertical plane are used which allows further gain improvement and reaching the required one.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124770878","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464751
S. Podilchak, A. Freundorfer, Y. Antar
Planar antenna designs that utilize surface waves (SWs) for leaky wave (LW) excitation are investigated for millimeter wave frequencies of operation. Surface-wave launchers (SWLs) are employed as the antenna source generating cylindrical SWs for bound propagation on a grounded dielectric slab (GDS). By the addition of a segmented circular strip grating configuration, a partially reflecting surface (PRS) can be realized, providing suitable conditions for 2-D leaky-wave radiation. Directive pencil beam patterns at broadside, with gain values greater than 12 dBi at 19.5 GHz, can be achieved.
{"title":"Segmented circular strip planar leaky-wave antenna designs for broadside radiation and one-sided beam scanning","authors":"S. Podilchak, A. Freundorfer, Y. Antar","doi":"10.1109/IWAT.2010.5464751","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464751","url":null,"abstract":"Planar antenna designs that utilize surface waves (SWs) for leaky wave (LW) excitation are investigated for millimeter wave frequencies of operation. Surface-wave launchers (SWLs) are employed as the antenna source generating cylindrical SWs for bound propagation on a grounded dielectric slab (GDS). By the addition of a segmented circular strip grating configuration, a partially reflecting surface (PRS) can be realized, providing suitable conditions for 2-D leaky-wave radiation. Directive pencil beam patterns at broadside, with gain values greater than 12 dBi at 19.5 GHz, can be achieved.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124916513","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464650
M. S. Toubet, R. Chantalat, M. Thevenot, T. Monediere, B. Jecko
In this paper, we present the conception of a LOW-PROFILE and High-Gain EBG Resonator Antenna which is excited by several feeds. The antenna structure has been modelled with CST MICROWAVE STUDIO, an FIT (Finite Integration Technique) based software and meets the requirements of a precise specifications. It has a cut-off frequency of 1.2 GHz and delivers a maximum gain of about 18 dB over a bandwidth of 59%. The size of this antenna is small in accordance with the specifications, as it is 700 mm long and wide for a very low height of 16 mm which is equivalent to ¿/16.
{"title":"Conception of a Low-Profile and High-Gain EBG Resonator Antenna with wide bandwidth","authors":"M. S. Toubet, R. Chantalat, M. Thevenot, T. Monediere, B. Jecko","doi":"10.1109/IWAT.2010.5464650","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464650","url":null,"abstract":"In this paper, we present the conception of a LOW-PROFILE and High-Gain EBG Resonator Antenna which is excited by several feeds. The antenna structure has been modelled with CST MICROWAVE STUDIO, an FIT (Finite Integration Technique) based software and meets the requirements of a precise specifications. It has a cut-off frequency of 1.2 GHz and delivers a maximum gain of about 18 dB over a bandwidth of 59%. The size of this antenna is small in accordance with the specifications, as it is 700 mm long and wide for a very low height of 16 mm which is equivalent to ¿/16.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122534761","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464922
T. Suda, Y. Kazama, S. Hasegawa, O. Hashimoto, T. Takano
In this paper, a phased array antenna which has a large number of element antenna and low grating lobes is described. The element antenna has a conical shaped radiation pattern which is suitable for a mobile satellite communications. To reduce a number of phase shifter, partially driven array technique which is one kind of thinned array is employed. The beam scanning characteristics of 243-element array antenna are investigated computationally.
{"title":"A large number of phased array antenna with low grating lobes using partially driven technique","authors":"T. Suda, Y. Kazama, S. Hasegawa, O. Hashimoto, T. Takano","doi":"10.1109/IWAT.2010.5464922","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464922","url":null,"abstract":"In this paper, a phased array antenna which has a large number of element antenna and low grating lobes is described. The element antenna has a conical shaped radiation pattern which is suitable for a mobile satellite communications. To reduce a number of phase shifter, partially driven array technique which is one kind of thinned array is employed. The beam scanning characteristics of 243-element array antenna are investigated computationally.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125425473","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464927
P. H. F. da Silva, J. Trindade, A. D’assunção
In this work a reconfigurable Minkowski patch antenna has been designed, fabricated, and measured. The proposed patch antenna has the advantage of low profile, lightweight, and easy fabrication, and is potential for wireless communication applications. Ansoft Designer¿ software aided the regonfigurable multiband antenna design with applications for wireless networks. In particular, a prototype was built with applications for Wi-Fi considering for the IEEE 802.11a standard and WiMAX. Frequency reconfigurability is achieved by means of switches placed on the pre-fractal edges of the proposed antenna. The conducted experimental characterization of the Minkowski patch antenna was done with a vector network analyzer in the range of 100 KHz to 7.0 GHz and showed very promising results.
{"title":"Experimental characterization of a reconfigurable multiband Minkowski patch antenna","authors":"P. H. F. da Silva, J. Trindade, A. D’assunção","doi":"10.1109/IWAT.2010.5464927","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464927","url":null,"abstract":"In this work a reconfigurable Minkowski patch antenna has been designed, fabricated, and measured. The proposed patch antenna has the advantage of low profile, lightweight, and easy fabrication, and is potential for wireless communication applications. Ansoft Designer¿ software aided the regonfigurable multiband antenna design with applications for wireless networks. In particular, a prototype was built with applications for Wi-Fi considering for the IEEE 802.11a standard and WiMAX. Frequency reconfigurability is achieved by means of switches placed on the pre-fractal edges of the proposed antenna. The conducted experimental characterization of the Minkowski patch antenna was done with a vector network analyzer in the range of 100 KHz to 7.0 GHz and showed very promising results.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125756665","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464652
D. Rialet, A. Sharaiha, A. Tarot, C. Delaveaud, B. Viala
It is becoming increasingly common to use magnetic substrates in antenna devices. A model of effective permeability is showed in order to analyse the behaviour of magnetic multilayer. From this model, we can see the negative effect of the conductivity to the effective permeability of a multilayer magnetic substrate.
{"title":"Modeling of a multi-layer conductor magnetic substrate on antenna devices","authors":"D. Rialet, A. Sharaiha, A. Tarot, C. Delaveaud, B. Viala","doi":"10.1109/IWAT.2010.5464652","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464652","url":null,"abstract":"It is becoming increasingly common to use magnetic substrates in antenna devices. A model of effective permeability is showed in order to analyse the behaviour of magnetic multilayer. From this model, we can see the negative effect of the conductivity to the effective permeability of a multilayer magnetic substrate.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125770578","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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