Pub Date : 2014-11-24DOI: 10.1109/IWEM.2014.6963653
Q. Chu, Fulong Chen, Lei‐Lei Qiu, Jie-Ming Qiu
Some novel bandstop filters (BSF's) are proposed,including a sharp-rejection BSF via the combination of the conventional BSF and signal interference technique, a sharp-rejection dual-band BSF using signal-interaction concept with three paths. The measurement results have a good agreement with the simulation results.
{"title":"Novel sharp-rejection and dual-band bandstop filters","authors":"Q. Chu, Fulong Chen, Lei‐Lei Qiu, Jie-Ming Qiu","doi":"10.1109/IWEM.2014.6963653","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963653","url":null,"abstract":"Some novel bandstop filters (BSF's) are proposed,including a sharp-rejection BSF via the combination of the conventional BSF and signal interference technique, a sharp-rejection dual-band BSF using signal-interaction concept with three paths. The measurement results have a good agreement with the simulation results.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122005485","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963742
A. Amiri, C. Borda Fortuny, K. Tong
Two different reconfigurable techniques for spectrum-monitoring antenna are presented. The first method inserts high-performance RF-MEMS switches along the microstrip feed line and back slot of a Vivaldi antenna for switching between three frequency bands centered at 2, 3.5 and 5.25 GHz. The second method collocates three different excitations in the defined space and utilise a common aperture for the bands from 500 MHz to 8GHz. The radiation patterns of the two proposed antennas are maintained in the broadside direction. The proposed antennas offer improved performance over multiple antennas, wideband and multiband application and are suitable for wide RF spectrum monitoring.
{"title":"Reconfigurable antennas for very wide spectrum monitoring","authors":"A. Amiri, C. Borda Fortuny, K. Tong","doi":"10.1109/IWEM.2014.6963742","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963742","url":null,"abstract":"Two different reconfigurable techniques for spectrum-monitoring antenna are presented. The first method inserts high-performance RF-MEMS switches along the microstrip feed line and back slot of a Vivaldi antenna for switching between three frequency bands centered at 2, 3.5 and 5.25 GHz. The second method collocates three different excitations in the defined space and utilise a common aperture for the bands from 500 MHz to 8GHz. The radiation patterns of the two proposed antennas are maintained in the broadside direction. The proposed antennas offer improved performance over multiple antennas, wideband and multiband application and are suitable for wide RF spectrum monitoring.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129763860","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963609
Fumihiko Nonaka, S. Saito, Y. Kimura
This paper presents design of a microstrip antenna array fed by transverse slots on a broad wall of the rectangular waveguide with standing wave excitation for linear polarization parallel to the axis. A series-fed two-element microstrip antenna array on a dielectric substrate excited by a transverses slot of the waveguide is used as an element of the proposed array. In this paper, radiation power control of the array element and a design example of the three-element array with standing wave excitation is presented by HFSS simulation.
{"title":"Design of a microstrip antenna array fed by transverse slots on a broad wall of the rectangular waveguide with standing-wave excitation for linear polarization parallel to the axis","authors":"Fumihiko Nonaka, S. Saito, Y. Kimura","doi":"10.1109/IWEM.2014.6963609","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963609","url":null,"abstract":"This paper presents design of a microstrip antenna array fed by transverse slots on a broad wall of the rectangular waveguide with standing wave excitation for linear polarization parallel to the axis. A series-fed two-element microstrip antenna array on a dielectric substrate excited by a transverses slot of the waveguide is used as an element of the proposed array. In this paper, radiation power control of the array element and a design example of the three-element array with standing wave excitation is presented by HFSS simulation.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128451013","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963646
Wen‐Shan Chen, Jianzhou You, Chien‐Ming Wu, Hong‐Twu Chen, Yung-Tao Liu
In this paper, we present a coupled-fed meandered loop antenna on a planar structure. The antenna is fabricated on the FR4 substrate of thickness of 1.6mm and permittivity of 4.4. The antenna with a total size of 30 mm × 13.75 mm × 1.6 mm is feed by a 50 Ohm mini-coaxial line. By using an L-shaped monopole connected on the coaxial line and the meander loop to generate multiple modes to form the required bandwidth in IEEE 802.11 a/b/g applications. Simulated and measured results are in good agreement, and the antenna design and performances are discussed in this paper.
本文提出了一种平面结构上的耦合馈电弯曲环路天线。天线制作在厚度为1.6mm，介电常数为4.4的FR4衬底上。天线总尺寸为30 mm × 13.75 mm × 1.6 mm，馈线为50欧姆微型同轴线。在IEEE 802.11 a/b/g应用中，通过l型单极子连接在同轴线上与弯曲环路产生多种模式来形成所需带宽。仿真结果与实测结果吻合较好，并对天线的设计和性能进行了讨论。
{"title":"Coupled-fed meandered loop antenna for USB dongle applications","authors":"Wen‐Shan Chen, Jianzhou You, Chien‐Ming Wu, Hong‐Twu Chen, Yung-Tao Liu","doi":"10.1109/IWEM.2014.6963646","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963646","url":null,"abstract":"In this paper, we present a coupled-fed meandered loop antenna on a planar structure. The antenna is fabricated on the FR4 substrate of thickness of 1.6mm and permittivity of 4.4. The antenna with a total size of 30 mm × 13.75 mm × 1.6 mm is feed by a 50 Ohm mini-coaxial line. By using an L-shaped monopole connected on the coaxial line and the meander loop to generate multiple modes to form the required bandwidth in IEEE 802.11 a/b/g applications. Simulated and measured results are in good agreement, and the antenna design and performances are discussed in this paper.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128659817","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963696
Kenta Kuwabara, T. Uno, T. Arima
MHz frequency range is often used for wireless power transmission engineering, antenna engineering and so on. In the FDTD method, small cell size is required with complexity of analysis object. On the other hand, the FDTD maximum time step is determined by FDTD cell size. A quite small time step is required if small cell size is used. However, time period of MHz is long. Therefore, extremely large number of time steps is required to calculate MHz frequency range by the FDTD method. In this paper, reducing calculation time technique in the FDTD MHz range analysis is proposed. The proposed method uses ARMA (Autoregressive moving average model) model.
{"title":"FDTD analysis of MHz band using Autoregressive moving average model","authors":"Kenta Kuwabara, T. Uno, T. Arima","doi":"10.1109/IWEM.2014.6963696","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963696","url":null,"abstract":"MHz frequency range is often used for wireless power transmission engineering, antenna engineering and so on. In the FDTD method, small cell size is required with complexity of analysis object. On the other hand, the FDTD maximum time step is determined by FDTD cell size. A quite small time step is required if small cell size is used. However, time period of MHz is long. Therefore, extremely large number of time steps is required to calculate MHz frequency range by the FDTD method. In this paper, reducing calculation time technique in the FDTD MHz range analysis is proposed. The proposed method uses ARMA (Autoregressive moving average model) model.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116146104","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963660
K. Kitao, T. Imai, Kentaro Saito
This paper describes characteristics of direct and scattered waves that are extracted from measurement channel data obtained using a 3.35 GHz vector channel sounder in an indoor environment. Each ray of the scattered waves is designated a number in order of the received level. The relationship between the ray number and the characteristics of each ray such as the received level, delay time, and azimuth angle of arrival (AOA) are investigated.
{"title":"Experimental study on spatio-temporal channel in indoor environments","authors":"K. Kitao, T. Imai, Kentaro Saito","doi":"10.1109/IWEM.2014.6963660","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963660","url":null,"abstract":"This paper describes characteristics of direct and scattered waves that are extracted from measurement channel data obtained using a 3.35 GHz vector channel sounder in an indoor environment. Each ray of the scattered waves is designated a number in order of the received level. The relationship between the ray number and the characteristics of each ray such as the received level, delay time, and azimuth angle of arrival (AOA) are investigated.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124465653","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963644
Yoshie Mukainoge, H. Deguchi, M. Tsuji
This paper proposes composed right/left handed transmission lines (CRLH-TL) consisting of arbitrarily-shaped conductor elements, which are designed by a genetic algorithm (GA). However, when the right/left handed transmission lines are constructed by these elements, the higher-order mode coupling between the adjacent elements often causes the unexpected transmission characteristics error and then the performance is deteriorated. So, we choose not only the phase constants in the case of infinite periodic cells but also transmission characteristics in periodic 3 cells as a fitness function. A design example is demonstrated, and its effectiveness is proved from comparison of transmission characteristics between the calculated and the measured results.
{"title":"An optimized design method of composite right/left handed transmission lines considering higher-order mode interaction by genetic algorithm","authors":"Yoshie Mukainoge, H. Deguchi, M. Tsuji","doi":"10.1109/IWEM.2014.6963644","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963644","url":null,"abstract":"This paper proposes composed right/left handed transmission lines (CRLH-TL) consisting of arbitrarily-shaped conductor elements, which are designed by a genetic algorithm (GA). However, when the right/left handed transmission lines are constructed by these elements, the higher-order mode coupling between the adjacent elements often causes the unexpected transmission characteristics error and then the performance is deteriorated. So, we choose not only the phase constants in the case of infinite periodic cells but also transmission characteristics in periodic 3 cells as a fitness function. A design example is demonstrated, and its effectiveness is proved from comparison of transmission characteristics between the calculated and the measured results.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127908455","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963741
Yong-xin Guo, Changrong Liu
A single-fed miniaturized circularly polarized (CP) microstrip patch antenna is designed and experimentally demonstrated for biomedical applications. The proposed antenna is designed utilizing the capacitive loading on the radiator. Compared with a square patch antenna, the proposed antenna has achieved a significant size-reduction of ~72%. The footprint of proposed antenna is 10×10×1.27 mm3. The simulated impedance, axial ratio (AR) and radiation pattern are studied and compared in different phantom model and a Gustav voxel human body. The effect of different body phantoms is discussed to evaluate the sensitivity of the proposed antenna. The simulated and measured impedance bandwidths in one-layer skin phantom are 7.7% and 10.2%, respectively.
{"title":"Miniaturized implantable circularly polarized patch antenna","authors":"Yong-xin Guo, Changrong Liu","doi":"10.1109/IWEM.2014.6963741","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963741","url":null,"abstract":"A single-fed miniaturized circularly polarized (CP) microstrip patch antenna is designed and experimentally demonstrated for biomedical applications. The proposed antenna is designed utilizing the capacitive loading on the radiator. Compared with a square patch antenna, the proposed antenna has achieved a significant size-reduction of ~72%. The footprint of proposed antenna is 10×10×1.27 mm3. The simulated impedance, axial ratio (AR) and radiation pattern are studied and compared in different phantom model and a Gustav voxel human body. The effect of different body phantoms is discussed to evaluate the sensitivity of the proposed antenna. The simulated and measured impedance bandwidths in one-layer skin phantom are 7.7% and 10.2%, respectively.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131997179","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 : 2014-11-24DOI: 10.1109/IWEM.2014.6963624
N. Tran, T. Imai, Y. Okumura
In order to apply super high frequency (SHF) bands to small cells, we clarify basic propagation characteristics and shadowing loss due to human body shadowing in the SHF (over 6 GHz) bands based on measurements.
{"title":"Study on propagation characteristics in SHF (over 6 GHz) bands","authors":"N. Tran, T. Imai, Y. Okumura","doi":"10.1109/IWEM.2014.6963624","DOIUrl":"https://doi.org/10.1109/IWEM.2014.6963624","url":null,"abstract":"In order to apply super high frequency (SHF) bands to small cells, we clarify basic propagation characteristics and shadowing loss due to human body shadowing in the SHF (over 6 GHz) bands based on measurements.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132006270","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 : 2014-11-24DOI: 10.1587/TRANSCOM.E98.B.806
Makoto Tanaka, H. Iwai, H. Sasaoka
Various applications utilizing the locality of the fading characteristics have recently been developed. In case we estimate received signal beyond the spatial correlation distance of the fading characteristics, a variety of new applications can be imagined. In this paper we propose a method to estimate received signal at an arbitrary remote location. The MUSIC method and the Least squares method are utilized to estimate the received signal. We present the details of the proposed method and evaluate the estimation performance by computer simulations quantitatively.
{"title":"Estimation of received signal at an arbitrary remote location using MUSIC method","authors":"Makoto Tanaka, H. Iwai, H. Sasaoka","doi":"10.1587/TRANSCOM.E98.B.806","DOIUrl":"https://doi.org/10.1587/TRANSCOM.E98.B.806","url":null,"abstract":"Various applications utilizing the locality of the fading characteristics have recently been developed. In case we estimate received signal beyond the spatial correlation distance of the fading characteristics, a variety of new applications can be imagined. In this paper we propose a method to estimate received signal at an arbitrary remote location. The MUSIC method and the Least squares method are utilized to estimate the received signal. We present the details of the proposed method and evaluate the estimation performance by computer simulations quantitatively.","PeriodicalId":431192,"journal":{"name":"2014 IEEE International Workshop on Electromagnetics (iWEM)","volume":"352 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132642167","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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