Pub Date : 2013-03-04DOI: 10.1109/IWAT.2013.6518323
S. Lindenmeier, L. Reiter, J. Kammerer, S. Senega
For mobile satellite radio reception in cars high demands are made to the antennas with respect to gain, efficiency, volume requirements and mounting conditions as well as reliable reception in fading environment. In comparison to common antennas for satellite digital audio radio services (SDARS) as well as for navigation services, new types of single satellite antennas and combinations for antenna diversity are shown. New ring antennas of type “Scarabeus” show a significantly higher performance compared to common patch antennas. In severe fading scenarios a set of up to three SDARS antennas, which are located together within a mounting volume of only around 1.5" × 1.5" × 0.5" together with an appropriate scan-phase diversity circuitry lead to a reduction of mute rates by more than one order of magnitude. This diversity technology enables for the first time the use of critical mounting positions like in side mirrors or on the dashboard, which would never be used for single antennas.
{"title":"Antenna technology for mobile satellite radio reception","authors":"S. Lindenmeier, L. Reiter, J. Kammerer, S. Senega","doi":"10.1109/IWAT.2013.6518323","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518323","url":null,"abstract":"For mobile satellite radio reception in cars high demands are made to the antennas with respect to gain, efficiency, volume requirements and mounting conditions as well as reliable reception in fading environment. In comparison to common antennas for satellite digital audio radio services (SDARS) as well as for navigation services, new types of single satellite antennas and combinations for antenna diversity are shown. New ring antennas of type “Scarabeus” show a significantly higher performance compared to common patch antennas. In severe fading scenarios a set of up to three SDARS antennas, which are located together within a mounting volume of only around 1.5\" × 1.5\" × 0.5\" together with an appropriate scan-phase diversity circuitry lead to a reduction of mute rates by more than one order of magnitude. This diversity technology enables for the first time the use of critical mounting positions like in side mirrors or on the dashboard, which would never be used for single antennas.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"12 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":"127424177","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.2013.6518338
H. Gulan, S. Beer, S. Diebold, C. Rusch, A. Leuther, I. Kallfass, T. Zwick
In this paper a probe based measurement setup is presented that allows the characterization of antennas in the frequency-range between 220 GHz and 325 GHz. The radiation pattern, as well as the gain and the return loss of the antenna under test (AUT) can be measured. The limits of the system in terms of accuracy and dynamic range are given. To demonstrate its functionality a 240 GHz patch-antenna on Gallium Arsenide (GaAs) substrate is measured. A comparison between simulation and measurement shows very good agreement.
{"title":"Probe based antenna measurements up to 325 GHz for upcoming millimeter-wave applications","authors":"H. Gulan, S. Beer, S. Diebold, C. Rusch, A. Leuther, I. Kallfass, T. Zwick","doi":"10.1109/IWAT.2013.6518338","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518338","url":null,"abstract":"In this paper a probe based measurement setup is presented that allows the characterization of antennas in the frequency-range between 220 GHz and 325 GHz. The radiation pattern, as well as the gain and the return loss of the antenna under test (AUT) can be measured. The limits of the system in terms of accuracy and dynamic range are given. To demonstrate its functionality a 240 GHz patch-antenna on Gallium Arsenide (GaAs) substrate is measured. A comparison between simulation and measurement shows very good agreement.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"4 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":"126117162","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.2013.6518376
Shuai Zhang, K. Zhao, Z. Ying, Sailing He
In this paper, the diagonal antenna-chassis mode is introduced to reduce the correlation between MIMO antenna elements. With this mode a wideband LTE MIMO antenna array is proposed, which can cover an impedance bandwidth of 747-960 MHz with an envelope correlation coefficient (ECC) less than 0.5 and an total efficiency better than -3 dB.
{"title":"Diagonal antenna-chassis mode for wideband LTE MIMO antenna arrays in mobile handsets","authors":"Shuai Zhang, K. Zhao, Z. Ying, Sailing He","doi":"10.1109/IWAT.2013.6518376","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518376","url":null,"abstract":"In this paper, the diagonal antenna-chassis mode is introduced to reduce the correlation between MIMO antenna elements. With this mode a wideband LTE MIMO antenna array is proposed, which can cover an impedance bandwidth of 747-960 MHz with an envelope correlation coefficient (ECC) less than 0.5 and an total efficiency better than -3 dB.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"41 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":"116980099","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.2013.6518354
X. Sun, S. Cheung, T. Yuk
In this paper, the design of a dual-band antenna for universal-serial-bus (USB) dongle applications in the 2.4-GHz wireless-local-area network (WLAN) and 3.5-GHz Worldwide Interoperability for Microwave Access (WiMAX) systems is presented. The antenna consists of two folded inverted-F radiating elements. One inverted- F element generates a 2.45-GHz band for the WLAN band (2.4-2.484 GHz), and both inverted-F elements together resonate at around 3.5 GHz to generate a wide frequency band for the WiMAX system (3.3-3.8 GHz). The antenna is designed on a 25×70 mm2 printed-circuit board (PCB), same size of an USB dongle PCB. For verification of simulation results, a prototype is fabricated and measured. Measured results show that the antenna has two impedance bandwidths, 2.39-2.5 GHz and 3.24-3.8 GHz, for the WLAN and WiMAX applications, respectively. The simulated and measured radiation patterns, efficiencies and gains of the antenna are all presented.
{"title":"A dual-band antenna for wireless USB dongle applications","authors":"X. Sun, S. Cheung, T. Yuk","doi":"10.1109/IWAT.2013.6518354","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518354","url":null,"abstract":"In this paper, the design of a dual-band antenna for universal-serial-bus (USB) dongle applications in the 2.4-GHz wireless-local-area network (WLAN) and 3.5-GHz Worldwide Interoperability for Microwave Access (WiMAX) systems is presented. The antenna consists of two folded inverted-F radiating elements. One inverted- F element generates a 2.45-GHz band for the WLAN band (2.4-2.484 GHz), and both inverted-F elements together resonate at around 3.5 GHz to generate a wide frequency band for the WiMAX system (3.3-3.8 GHz). The antenna is designed on a 25×70 mm2 printed-circuit board (PCB), same size of an USB dongle PCB. For verification of simulation results, a prototype is fabricated and measured. Measured results show that the antenna has two impedance bandwidths, 2.39-2.5 GHz and 3.24-3.8 GHz, for the WLAN and WiMAX applications, respectively. The simulated and measured radiation patterns, efficiencies and gains of the antenna are all presented.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"35 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":"126347835","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.2013.6518300
T. Smits, S. Suckrow, J. Christ, M. Geissler
In this paper an innovative antenna system for car2car applications is described. The antenna system is based on an active antenna module containing the antennas as well as the complete car2car chip hardware and software. This module is very small, so that it can be integrated e.g. into a shark fin antenna on the cars rooftop. Moreover additional modules can be mounted somewhere else in the car and connected with the main module via Ethernet. This allows high flexibility and re-configurability of the system. Two test cars have been equipped with the new car2car demonstrator systems and measurements have been performed in the 3D measurement chamber as well as in dynamic outdoor scenarios. The new system shows excellent performance in measurements and field trials.
{"title":"Active intelligent antenna system for car2car","authors":"T. Smits, S. Suckrow, J. Christ, M. Geissler","doi":"10.1109/IWAT.2013.6518300","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518300","url":null,"abstract":"In this paper an innovative antenna system for car2car applications is described. The antenna system is based on an active antenna module containing the antennas as well as the complete car2car chip hardware and software. This module is very small, so that it can be integrated e.g. into a shark fin antenna on the cars rooftop. Moreover additional modules can be mounted somewhere else in the car and connected with the main module via Ethernet. This allows high flexibility and re-configurability of the system. Two test cars have been equipped with the new car2car demonstrator systems and measurements have been performed in the 3D measurement chamber as well as in dynamic outdoor scenarios. The new system shows excellent performance in measurements and field trials.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"46 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":"132713402","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.2013.6518369
T. Yilmaz, M. Munoz, R. Foster, Y. Hao
Recent activities at Queen Mary, University of London, relating to wearable wireless sensors research for healthcare applications are reviewed in this paper. The monitoring of blood glucose levels using non-invasive radio-based sensors is discussed. The analysis of on-body radio propagation channels is then presented, with an emphasis on variations related to activity.
{"title":"Wearable wireless sensors for healthcare applications","authors":"T. Yilmaz, M. Munoz, R. Foster, Y. Hao","doi":"10.1109/IWAT.2013.6518369","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518369","url":null,"abstract":"Recent activities at Queen Mary, University of London, relating to wearable wireless sensors research for healthcare applications are reviewed in this paper. The monitoring of blood glucose levels using non-invasive radio-based sensors is discussed. The analysis of on-body radio propagation channels is then presented, with an emphasis on variations related to activity.","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":"130937899","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.2013.6518342
Wenwen Yang, Jianyi Zhou
A technique to design a wideband low profile microstrip patch antenna is presented in this paper. The proposed antenna consists of a tooth-like-slot patch and an inset feeding microstrip line. Two resonant modes are excited to broaden the bandwidth with the total substrate thickness of only 0.033λ0. The antenna and a 2×2 array operating at 10GHz are fabricated with printed circuit board process. The prototypes with single element achieve a bandwidth of 10.5% for -10dB return loss and a gain of 9.4dBi while the 2×2 array achieve a bandwidth of 10.6% and a gain of 15.1dBi. The proposed antenna exhibits low profile, low fabrication cost, easy integration with planar circuits and still retains the advantages of high gain and wideband.
{"title":"A single layer wideband low profile tooth-like-slot microstrip patch antenna fed by inset microstrip line","authors":"Wenwen Yang, Jianyi Zhou","doi":"10.1109/IWAT.2013.6518342","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518342","url":null,"abstract":"A technique to design a wideband low profile microstrip patch antenna is presented in this paper. The proposed antenna consists of a tooth-like-slot patch and an inset feeding microstrip line. Two resonant modes are excited to broaden the bandwidth with the total substrate thickness of only 0.033λ0. The antenna and a 2×2 array operating at 10GHz are fabricated with printed circuit board process. The prototypes with single element achieve a bandwidth of 10.5% for -10dB return loss and a gain of 9.4dBi while the 2×2 array achieve a bandwidth of 10.6% and a gain of 15.1dBi. The proposed antenna exhibits low profile, low fabrication cost, easy integration with planar circuits and still retains the advantages of high gain and wideband.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"68 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":"129195666","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.2013.6518336
E. Tsakalaki, O. Alrabadi, A. Tatomirescu, E. Carvalho, G. Pedersen
Concurrent communication and sensing is a vital cognitive radio (CR) functionality for real-time and accurate monitoring of the radio spectrum that totally depends on the ability of isolating the communication path from the sensing path to a level which ensures that the local transmissions do not overload the sensing unit. Upon discussing the basic challenges that restrain CR from simultaneously sensing the spectrum while transmitting in the same band, the paper presents a novel antenna cancellation approach that promises to empower CRs with concurrent transmission and sensing capabilities. The idea is to equip the CR with redundant transmit antennas to form a spatial filter that selectively cancels the transmit signal in the sensing direction. Such antenna cancellation resulted in an isolation level of 60dB that can be further increased when combined with active power cancellation in the RF or baseband stage.
{"title":"Antenna cancellation for simultaneous cognitive radio communication and sensing","authors":"E. Tsakalaki, O. Alrabadi, A. Tatomirescu, E. Carvalho, G. Pedersen","doi":"10.1109/IWAT.2013.6518336","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518336","url":null,"abstract":"Concurrent communication and sensing is a vital cognitive radio (CR) functionality for real-time and accurate monitoring of the radio spectrum that totally depends on the ability of isolating the communication path from the sensing path to a level which ensures that the local transmissions do not overload the sensing unit. Upon discussing the basic challenges that restrain CR from simultaneously sensing the spectrum while transmitting in the same band, the paper presents a novel antenna cancellation approach that promises to empower CRs with concurrent transmission and sensing capabilities. The idea is to equip the CR with redundant transmit antennas to form a spatial filter that selectively cancels the transmit signal in the sensing direction. Such antenna cancellation resulted in an isolation level of 60dB that can be further increased when combined with active power cancellation in the RF or baseband stage.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"102 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":"132828536","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.2013.6518291
A. Narbudowicz, X. Bao, M. Ammann
We propose an omnidirectional circularly polarised planar microstrip patch antenna, in which both impedance bandwidth and circular polarization properties can be adjusted after antenna manufacture. This is done by appropriately tuning four adjustable capacitors, incorporated into the patches. To demonstrate the properties, the proposed antenna is tuned to the GPS L1 band and then re-tuned for Beidou/Galileo E2 band by only changing capacitors values. Design guidelines for such retuning are provided.
{"title":"Omnidirectional circularly polarized patch antenna with post manufacture characteristic refinement","authors":"A. Narbudowicz, X. Bao, M. Ammann","doi":"10.1109/IWAT.2013.6518291","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518291","url":null,"abstract":"We propose an omnidirectional circularly polarised planar microstrip patch antenna, in which both impedance bandwidth and circular polarization properties can be adjusted after antenna manufacture. This is done by appropriately tuning four adjustable capacitors, incorporated into the patches. To demonstrate the properties, the proposed antenna is tuned to the GPS L1 band and then re-tuned for Beidou/Galileo E2 band by only changing capacitors values. Design guidelines for such retuning are provided.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"8 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":"131859361","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.2013.6518355
Yih-Chien Chen, Pin-Tang Chiu, J. Tsai, Ming-De Chen
In this paper, the simulation and measurement results of triple-band planar monopole antenna for application in WLAN and WiMAX bands were presented. The triple-band planar monopole antenna was fabricated on a FR4 substrate. The proposed planar monopole antenna comprised three radiating elements with a longer, middle, and shorter radiating strips. The longer strip controls the lower band of the proposed antenna, while the middle and shorter strips generate the middle and upper bands, respectively. The bandwidth of the proposed triple-band monopole antenna covered the WLAN and WiMAX bands simultaneously.
{"title":"A compact triple-band planar monopole antenna for WLAN and WiMAX applications","authors":"Yih-Chien Chen, Pin-Tang Chiu, J. Tsai, Ming-De Chen","doi":"10.1109/IWAT.2013.6518355","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518355","url":null,"abstract":"In this paper, the simulation and measurement results of triple-band planar monopole antenna for application in WLAN and WiMAX bands were presented. The triple-band planar monopole antenna was fabricated on a FR4 substrate. The proposed planar monopole antenna comprised three radiating elements with a longer, middle, and shorter radiating strips. The longer strip controls the lower band of the proposed antenna, while the middle and shorter strips generate the middle and upper bands, respectively. The bandwidth of the proposed triple-band monopole antenna covered the WLAN and WiMAX bands simultaneously.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"230 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":"134379992","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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