Pub Date : 2013-03-04DOI: 10.1109/IWAT.2013.6518303
B. Klein, T. Morf, M. Despont, U. Drechsler, D. Corcos, N. Kaminski, D. Elad, L. Kull, M. Braendli, T. Toifl, R. Hahnel, D. Plettemeier
The design of a broadband on-chip antenna for passive THz imaging in the frequency range of 0.6 THz to 1.4 THz is reported. The antenna design has to fulfill the requirements of the IBM CMOS process and the MEMS post CMOS processing. The antenna is coupled directly to the sensor, a MOSFET bolometer. Because of this direct coupling and the need for real time imaging, only extremely physically small antennas are feasible. Hence, typical broadband antennas like the toothed log-periodic antenna are not useable for this application and new antenna approaches have to be examined.
{"title":"Design of a wide-bandwidth on-chip antenna for uncooled passive THz imaging","authors":"B. Klein, T. Morf, M. Despont, U. Drechsler, D. Corcos, N. Kaminski, D. Elad, L. Kull, M. Braendli, T. Toifl, R. Hahnel, D. Plettemeier","doi":"10.1109/IWAT.2013.6518303","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518303","url":null,"abstract":"The design of a broadband on-chip antenna for passive THz imaging in the frequency range of 0.6 THz to 1.4 THz is reported. The antenna design has to fulfill the requirements of the IBM CMOS process and the MEMS post CMOS processing. The antenna is coupled directly to the sensor, a MOSFET bolometer. Because of this direct coupling and the need for real time imaging, only extremely physically small antennas are feasible. Hence, typical broadband antennas like the toothed log-periodic antenna are not useable for this application and new antenna approaches have to be examined.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"93 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":"115192728","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.2013.6518363
Y. Tanogashira, T. Fukusako
A surface wave antenna with a 2-by-3 array of a coupled array of dogbone-shaped pair, or dogbone-pair structure, is presented. This antenna has advantages of low-profile structure and having a directional radiation pattern. The direction of the main beam is directed parallel to the longest part of the dogbone element. Furthermore, this antenna shows a uni-directional radiation pattern in the horizontal plane and an increased antenna gain compared to that with 2-by-2 elements having a bi-directional radiation pattern.
{"title":"A low-profile surface wave antenna with directional beam pattern using 2-by-3 dogbone-pair structure","authors":"Y. Tanogashira, T. Fukusako","doi":"10.1109/IWAT.2013.6518363","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518363","url":null,"abstract":"A surface wave antenna with a 2-by-3 array of a coupled array of dogbone-shaped pair, or dogbone-pair structure, is presented. This antenna has advantages of low-profile structure and having a directional radiation pattern. The direction of the main beam is directed parallel to the longest part of the dogbone element. Furthermore, this antenna shows a uni-directional radiation pattern in the horizontal plane and an increased antenna gain compared to that with 2-by-2 elements having a bi-directional radiation pattern.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"98 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":"124686292","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.2013.6518343
L. Rudant, C. Delaveaud
A miniaturization technique using capacitive loads is investigated in order to design an electrically small antenna for compact sensor node. A specific implementation is developed to build a prototype whose first measurements confirm the proper functioning.
{"title":"Investigation of lumped loading technique for printed antenna miniaturization","authors":"L. Rudant, C. Delaveaud","doi":"10.1109/IWAT.2013.6518343","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518343","url":null,"abstract":"A miniaturization technique using capacitive loads is investigated in order to design an electrically small antenna for compact sensor node. A specific implementation is developed to build a prototype whose first measurements confirm the proper functioning.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"146 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":"132415368","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.2013.6518321
Jun-ping Geng, Dunyuan Chen, R. Jin, Xianling Liang, Jingjing Tang, R. Ziolkowski
A novel toroid-structured coated nano particle (T-CNP) antenna with active core (doped with rare earth ion Er3+) is investigated in this paper. It is observed that the active T-CNP can achieve a scattering gain at a frequency near 600 THz. The size of the gain is affected greatly by how the T-CNP antenna is illuminated with the incident plane wave. The gain of the T-CNP antenna with its axis along the direction of the incident E-field is 27.5 dB, while it is only 1.0 dB when the axis of the T-CNP antenna is parallel to the incident wave vector. With the T-CNP antenna's axis parallel to the incident E-field, the antenna responds in a resonant dipole mode.
{"title":"Study of active coated nano-toroid antennas","authors":"Jun-ping Geng, Dunyuan Chen, R. Jin, Xianling Liang, Jingjing Tang, R. Ziolkowski","doi":"10.1109/IWAT.2013.6518321","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518321","url":null,"abstract":"A novel toroid-structured coated nano particle (T-CNP) antenna with active core (doped with rare earth ion Er3+) is investigated in this paper. It is observed that the active T-CNP can achieve a scattering gain at a frequency near 600 THz. The size of the gain is affected greatly by how the T-CNP antenna is illuminated with the incident plane wave. The gain of the T-CNP antenna with its axis along the direction of the incident E-field is 27.5 dB, while it is only 1.0 dB when the axis of the T-CNP antenna is parallel to the incident wave vector. With the T-CNP antenna's axis parallel to the incident E-field, the antenna responds in a resonant dipole mode.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"126 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":"131980940","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.2013.6518346
B. Sentucq, A. Sharaiha, S. Collardey
A metamaterial-inspired electrically small antenna design is presented. This antenna is based on a semi-loop near field parasitic element driven by an electrically small monopole antenna. The system has a dimension of λ0/24×λ0/24 and works in the UHF band, with a simulated efficiency of 14% and an average maximum gain of -5.6dB in the matched bandwidth of 18.4MHz. This antenna is then used in a two elements compact parasitic array, in order to achieve a higher directivity. The two elements of this array are identical, but only one of them is driven, the other one is used as a parasitic element. The design of the antenna, its simulated and measured radiation performance is reported, as well as those of the parasitic array.
{"title":"Superdirective compact parasitic array of metamaterial-inspired electrically small antenna","authors":"B. Sentucq, A. Sharaiha, S. Collardey","doi":"10.1109/IWAT.2013.6518346","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518346","url":null,"abstract":"A metamaterial-inspired electrically small antenna design is presented. This antenna is based on a semi-loop near field parasitic element driven by an electrically small monopole antenna. The system has a dimension of λ0/24×λ0/24 and works in the UHF band, with a simulated efficiency of 14% and an average maximum gain of -5.6dB in the matched bandwidth of 18.4MHz. This antenna is then used in a two elements compact parasitic array, in order to achieve a higher directivity. The two elements of this array are identical, but only one of them is driven, the other one is used as a parasitic element. The design of the antenna, its simulated and measured radiation performance is reported, as well as those of the parasitic array.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"1 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":"130427786","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.2013.6518351
H. S. Lee, Hong-min Lee
In this paper, we present a method for extending the bandwidth of a metamaterial absorber (MMA) with multi-resonance structure. The basic unit cell of the MMAs consists of a periodic arrangement of an electric-LC (ELC) resonator and a square loop structure. The absorption bandwidth of a MMA is effectively extended by combining five unit cell structures with different geometric dimensions into a co-planar unit cell. Experimental results show that the fabricated MMA is 0.8 mm (0.0026λ0) thick with a peak absorption rate of 93% at 10 GHz, and a full width at half maximum (FWHM) bandwidth of 940 MHz.
本文提出了一种扩展具有多共振结构的超材料吸收体(MMA)带宽的方法。MMAs的基本单元由一个周期性排列的电lc (ELC)谐振器和一个方形环路结构组成。通过将5个不同几何尺寸的单元胞结构组合成一个共面单元胞，有效地扩展了MMA的吸收带宽。实验结果表明，制备的MMA厚度为0.8 mm (0.0026λ0)，在10 GHz时峰值吸收率为93%，半峰宽(FWHM)带宽为940 MHz。
{"title":"Metamaterial absorber with extended bandwidth configuration","authors":"H. S. Lee, Hong-min Lee","doi":"10.1109/IWAT.2013.6518351","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518351","url":null,"abstract":"In this paper, we present a method for extending the bandwidth of a metamaterial absorber (MMA) with multi-resonance structure. The basic unit cell of the MMAs consists of a periodic arrangement of an electric-LC (ELC) resonator and a square loop structure. The absorption bandwidth of a MMA is effectively extended by combining five unit cell structures with different geometric dimensions into a co-planar unit cell. Experimental results show that the fabricated MMA is 0.8 mm (0.0026λ0) thick with a peak absorption rate of 93% at 10 GHz, and a full width at half maximum (FWHM) bandwidth of 940 MHz.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"7 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":"125483323","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.2013.6518318
M. Magani, L. Guo, X. Chen, A. Alomainy
This paper aims to study the performance of implementing adaptive modulation in Multiband Orthogonal Frequency Division Multiplexing Ultra Wideband (MB OFDM UWB) system. MB OFDM UWB technology has the potential of replacing other wireless technologies within the Personal Area Networks (PANs). Currently MB OFDMUWB devices operate below the expected performance which is largely due to its EIRP limit and frequency selective fading. This bottle neck can be reduced by implementing adaptive modulation in the system. In this Paper, channel measurement of different scenarios has been carried out. The scenarios are model of realistic environment where UWB devices will operate. Effects of different number of human subjects in various movement patterns are studied. The result show implementing exhibit that implementing adaptive modulation in UWB system enhances the performance of the system.
{"title":"Study of UWB adaptive bit loading in time varying channel","authors":"M. Magani, L. Guo, X. Chen, A. Alomainy","doi":"10.1109/IWAT.2013.6518318","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518318","url":null,"abstract":"This paper aims to study the performance of implementing adaptive modulation in Multiband Orthogonal Frequency Division Multiplexing Ultra Wideband (MB OFDM UWB) system. MB OFDM UWB technology has the potential of replacing other wireless technologies within the Personal Area Networks (PANs). Currently MB OFDMUWB devices operate below the expected performance which is largely due to its EIRP limit and frequency selective fading. This bottle neck can be reduced by implementing adaptive modulation in the system. In this Paper, channel measurement of different scenarios has been carried out. The scenarios are model of realistic environment where UWB devices will operate. Effects of different number of human subjects in various movement patterns are studied. The result show implementing exhibit that implementing adaptive modulation in UWB system enhances the performance of the system.","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":"115318658","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.2013.6518364
J. Romeu, S. Capdevila, J. Bolomey, L. Jofre
This paper presents the practical use of modulated scatterer technique (MST) for the measurement of the antenna input impedance using a multi-load automatic switching device, and it also includes the analysis of the measurement error as a function of the selected loads in the MST circuitry.
{"title":"Antenna input impedance measurement using multi-load MST","authors":"J. Romeu, S. Capdevila, J. Bolomey, L. Jofre","doi":"10.1109/IWAT.2013.6518364","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518364","url":null,"abstract":"This paper presents the practical use of modulated scatterer technique (MST) for the measurement of the antenna input impedance using a multi-load automatic switching device, and it also includes the analysis of the measurement error as a function of the selected loads in the MST circuitry.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"5 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":"121884150","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.2013.6518367
E. Moradi, K. Koski, L. Ukkonen, Y. Rahmat-Samii, T. Bjorninen, L. Sydanheimo
Wearable Radio Frequency Identification (RFID) tags for body-centric communication can be used in security, healthcare and biomedical applications. Embroidered tags using conductive threads are strong candidates for the implementation of wearable antennas. They provide several important features, such as flexibility, integrability, and light-weight structures. In this paper, the on-body performance of embroidered dipole-type ultra-high frequency (UHF) RFID tags is studied. First, modeling techniques for the embroidered tag antennas and for the human body are presented. The simulation models are then used to design and optimize an embroidered dipole tag to provide a read range of 2.5 m when separated from the human arm with a 1-mm thick layer of cotton fabric.
{"title":"Embroidered RFID tags in body-centric communication","authors":"E. Moradi, K. Koski, L. Ukkonen, Y. Rahmat-Samii, T. Bjorninen, L. Sydanheimo","doi":"10.1109/IWAT.2013.6518367","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518367","url":null,"abstract":"Wearable Radio Frequency Identification (RFID) tags for body-centric communication can be used in security, healthcare and biomedical applications. Embroidered tags using conductive threads are strong candidates for the implementation of wearable antennas. They provide several important features, such as flexibility, integrability, and light-weight structures. In this paper, the on-body performance of embroidered dipole-type ultra-high frequency (UHF) RFID tags is studied. First, modeling techniques for the embroidered tag antennas and for the human body are presented. The simulation models are then used to design and optimize an embroidered dipole tag to provide a read range of 2.5 m when separated from the human arm with a 1-mm thick layer of cotton fabric.","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":"133333921","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.2013.6518294
Zhang Ning, Zhang Ruipeng, Wang Suixue
A type of dual frequency and dual-circularly polarized antenna was presented in this paper. The stacked dielectric layers and two probes-fed were used to make the dual-frequency and dual-circularly polarized antennas into one antenna's area. The antenna was simulated by method of moment (MoM) to confirm its parameters. The measurement results showed that the antenna's performance was matched with simulated. The relative bandwith more than 15% (dual frequency, VSWR≤2.0). The beam gain in 110 degrees is higher than 0dBi; the AR is less than 3dB in band. It has good capability in dual frequency and dual circularly polarized.
{"title":"A design of dual-frequency and dual-circularly polarized patches antenna","authors":"Zhang Ning, Zhang Ruipeng, Wang Suixue","doi":"10.1109/IWAT.2013.6518294","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518294","url":null,"abstract":"A type of dual frequency and dual-circularly polarized antenna was presented in this paper. The stacked dielectric layers and two probes-fed were used to make the dual-frequency and dual-circularly polarized antennas into one antenna's area. The antenna was simulated by method of moment (MoM) to confirm its parameters. The measurement results showed that the antenna's performance was matched with simulated. The relative bandwith more than 15% (dual frequency, VSWR≤2.0). The beam gain in 110 degrees is higher than 0dBi; the AR is less than 3dB in band. It has good capability in dual frequency and dual circularly polarized.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"3 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":"131808727","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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