Pub Date : 2016-10-01DOI: 10.1587/COMEX.2017XBL0118
T. Tabata, M. Fujimoto, S. Hori, T. Wada, H. Asato
A new combing method of Adaptive Array Antenna for ISDB-T Mobile Reception system is proposed in this paper. From experimental results, it is clarified that the BER performances of the proposed system are superior to the conventional system.
{"title":"Incoming waves separating adaptive array for ISDB-T mobile reception","authors":"T. Tabata, M. Fujimoto, S. Hori, T. Wada, H. Asato","doi":"10.1587/COMEX.2017XBL0118","DOIUrl":"https://doi.org/10.1587/COMEX.2017XBL0118","url":null,"abstract":"A new combing method of Adaptive Array Antenna for ISDB-T Mobile Reception system is proposed in this paper. From experimental results, it is clarified that the BER performances of the proposed system are superior to the conventional system.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122985299","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 : 2016-10-01DOI: 10.1587/TRANSCOM.2017ISP0008
C. Sim, Chih-Chiang Chen, Che-Yu Li, Sheng Huang
A compact uniplanar antenna design for tablet/laptop applications is proposed. The main design principle of this antenna is the use of coupling-feed mechanism. The proposed antenna is composed of a T-shaped feeding strip, parasitic shorted strip, and a step tuning stub. With a small size of 50 mm × 15 mm × 0.8 mm, the proposed antenna is able to excite dual wideband operation that can cover the entire LTE/WWAN operations 698–960 MHz and 1710–2690 MHz. Furthermore, the proposed antenna also exhibits reduced ground effects, in which reducing the ground size of proposed antenna will not affect the antenna's performances.
提出了一种适用于平板电脑/笔记本电脑的紧凑型单平面天线设计方案。该天线的主要设计原理是采用耦合馈电机构。该天线由t形馈电带、寄生短路带和阶跃调谐短段组成。该天线尺寸较小，仅为50 mm × 15 mm × 0.8 mm，能够实现覆盖整个LTE/WWAN 698-960 MHz和1710-2690 MHz的双宽带操作。此外，所提天线还表现出较小的地面效应，即减小所提天线的地面尺寸不会影响天线的性能。
{"title":"Compact LTE/WWAN antenna with reduced ground effects for tablet/laptop applications","authors":"C. Sim, Chih-Chiang Chen, Che-Yu Li, Sheng Huang","doi":"10.1587/TRANSCOM.2017ISP0008","DOIUrl":"https://doi.org/10.1587/TRANSCOM.2017ISP0008","url":null,"abstract":"A compact uniplanar antenna design for tablet/laptop applications is proposed. The main design principle of this antenna is the use of coupling-feed mechanism. The proposed antenna is composed of a T-shaped feeding strip, parasitic shorted strip, and a step tuning stub. With a small size of 50 mm × 15 mm × 0.8 mm, the proposed antenna is able to excite dual wideband operation that can cover the entire LTE/WWAN operations 698–960 MHz and 1710–2690 MHz. Furthermore, the proposed antenna also exhibits reduced ground effects, in which reducing the ground size of proposed antenna will not affect the antenna's performances.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124190868","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 : 2016-10-01DOI: 10.1587/COMEX.2016SPL0016
S. Yonezawa, R. Bakar, H. Arai, A. Miura, H. Tsuji
This paper presents a beam switched antenna using inverted F antenna for mobile terminal application in satellite communication. The antenna produces unidirectional radiation patterns in yz-plane which can be switched in two directions using a simple feeding circuit. This paper discusses the prototype antenna as well as the feeding circuit which is fabricated to demonstrate the switching of the beam patterns in vertical plane.
{"title":"Beam switched antenna using inverted F antenna for mobile terminal","authors":"S. Yonezawa, R. Bakar, H. Arai, A. Miura, H. Tsuji","doi":"10.1587/COMEX.2016SPL0016","DOIUrl":"https://doi.org/10.1587/COMEX.2016SPL0016","url":null,"abstract":"This paper presents a beam switched antenna using inverted F antenna for mobile terminal application in satellite communication. The antenna produces unidirectional radiation patterns in yz-plane which can be switched in two directions using a simple feeding circuit. This paper discusses the prototype antenna as well as the feeding circuit which is fabricated to demonstrate the switching of the beam patterns in vertical plane.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132652602","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 : 2016-10-01DOI: 10.1587/COMEX.2016SPL0023
Yang Li, Hiroyasu Sato, Qiang Chen
The transmission factor from a capsule dipole antenna located in a digestive system of human body to the outside are investigated using the FDTD analysis. It is found that the peak values of the transmission factor are observed in a frequency range of 400–600 MHz for different organs of digestive system. High received power was obtained when a transmitting antenna and a receiving antenna have the same polarization. Received power was compared with different impedance matching conditions.
{"title":"FDTD analysis of capsule dipole antenna in digestive system of human body","authors":"Yang Li, Hiroyasu Sato, Qiang Chen","doi":"10.1587/COMEX.2016SPL0023","DOIUrl":"https://doi.org/10.1587/COMEX.2016SPL0023","url":null,"abstract":"The transmission factor from a capsule dipole antenna located in a digestive system of human body to the outside are investigated using the FDTD analysis. It is found that the peak values of the transmission factor are observed in a frequency range of 400–600 MHz for different organs of digestive system. High received power was obtained when a transmitting antenna and a receiving antenna have the same polarization. Received power was compared with different impedance matching conditions.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114482008","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 : 2016-10-01DOI: 10.1587/COMEX.2016SPL0006
R. Kaneda, H. Arai
A slim vertically polarized omni-directional feed circuit integrated loop slot antenna for mobile base station is proposed in this paper. Picocell antenna requires a compact and slim structure, because its construction space is limited in urban areas. The proposed antenna consists of loop slots and patches to improve omni-directional pattern and bandwidth. In order to enhance the directivity gain, we arrange two loop slot antennas in vertical plane with microstrip line connecting the slots. The size of antenna is only 0.17λ× 1.45λ. This antenna realizes more than 15% relative bandwidth, and an omni-directional pattern in both simulation and measurement results.
{"title":"Vertically polarized omni-directional loop slot array antenna for mobile base station","authors":"R. Kaneda, H. Arai","doi":"10.1587/COMEX.2016SPL0006","DOIUrl":"https://doi.org/10.1587/COMEX.2016SPL0006","url":null,"abstract":"A slim vertically polarized omni-directional feed circuit integrated loop slot antenna for mobile base station is proposed in this paper. Picocell antenna requires a compact and slim structure, because its construction space is limited in urban areas. The proposed antenna consists of loop slots and patches to improve omni-directional pattern and bandwidth. In order to enhance the directivity gain, we arrange two loop slot antennas in vertical plane with microstrip line connecting the slots. The size of antenna is only 0.17λ× 1.45λ. This antenna realizes more than 15% relative bandwidth, and an omni-directional pattern in both simulation and measurement results.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128491565","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 : 2016-10-01DOI: 10.1587/TRANSCOM.2017ISP0012
M. Nagasaka, S. Nakazawa, S. Tanaka
NHK will start test satellite broadcasting of UHDTV in 2016 and practical broadcasting in 2018. The test broadcasting will be provided in the 12-GHz (11.7 to 12.75 GHz) band by using right-hand circular polarization. We are planning to provide multiple UHDTV programs for the practical broadcasting by using left-hand circular polarization in the same frequency band. For the UHDTV satellite broadcasting reception, we manufactured and tested a dual-circularly polarized reflector antenna that has a feed antenna composed of a 2 × 2 microstrip antenna array. Measured results showed that the fabricated antenna complied with our requirements, with voltage standing wave ratio of less than 1.4, antenna gain of 34.5 dBi (i.e., the aperture efficiency was 69 %) and cross polarization discrimination of 28.7 dB. In the future, we will improve the sidelobe characteristics.
{"title":"Dual-circularly polarized parabolic reflector antenna with microstrip antenna array for 12-GHz band satellite broadcasting reception","authors":"M. Nagasaka, S. Nakazawa, S. Tanaka","doi":"10.1587/TRANSCOM.2017ISP0012","DOIUrl":"https://doi.org/10.1587/TRANSCOM.2017ISP0012","url":null,"abstract":"NHK will start test satellite broadcasting of UHDTV in 2016 and practical broadcasting in 2018. The test broadcasting will be provided in the 12-GHz (11.7 to 12.75 GHz) band by using right-hand circular polarization. We are planning to provide multiple UHDTV programs for the practical broadcasting by using left-hand circular polarization in the same frequency band. For the UHDTV satellite broadcasting reception, we manufactured and tested a dual-circularly polarized reflector antenna that has a feed antenna composed of a 2 × 2 microstrip antenna array. Measured results showed that the fabricated antenna complied with our requirements, with voltage standing wave ratio of less than 1.4, antenna gain of 34.5 dBi (i.e., the aperture efficiency was 69 %) and cross polarization discrimination of 28.7 dB. In the future, we will improve the sidelobe characteristics.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131033145","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}
This paper proposes novel design method of dualband reflectarray using genetic algorithm (GA). Ordinary, each elements of reflectarray are designed to have desired reflection phase. However, when we adopt same polarization in dual frequencies, the element configuration designed to satisfy desired reflection phase in one frequency influences the characteristics in other frequency. Therefore, it is difficult to achieve dual-band reflectarray. To address the issues, we adopt two layer patches for element to increase flexibility of design and optimize the patches configuration using GA. As a result, we achieve novel reflectarray that reflect wave towards the direction of theta equal to 27 deg.
{"title":"Design of dual-band reflectarray using genetic algorithm","authors":"T. Maruyama, Q. Chen, S. Kameda, N. Suematsu","doi":"10.1063/1.4993388","DOIUrl":"https://doi.org/10.1063/1.4993388","url":null,"abstract":"This paper proposes novel design method of dualband reflectarray using genetic algorithm (GA). Ordinary, each elements of reflectarray are designed to have desired reflection phase. However, when we adopt same polarization in dual frequencies, the element configuration designed to satisfy desired reflection phase in one frequency influences the characteristics in other frequency. Therefore, it is difficult to achieve dual-band reflectarray. To address the issues, we adopt two layer patches for element to increase flexibility of design and optimize the patches configuration using GA. As a result, we achieve novel reflectarray that reflect wave towards the direction of theta equal to 27 deg.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124947220","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 : 2016-10-01DOI: 10.1587/TRANSCOM.2017ISP0002
Zhi Zheng, Yuxuan Yang, Wen-qin Wang, Guangjun Li, Jiao Yang, Yan Ge
This paper proposes a novel method for two-dimensional (2-D) direction-of-arrival (DOA) estimation of multiple signals employing a sparse L-shaped array structured by a sparse linear array (SLA), a sparse uniform linear array (SULA) and an auxiliary sensor. In the proposed method, the elevation angles are estimated using the SLA and an improved MUSIC method. The azimuth angles are estimated by two stages. Firstly, the rough azimuth estimates are obtained by a cross-correlation matrix (CCM) of the array received data and the elevation estimates. Secondly, the fine azimuth estimates can be achieved using the SULA and the rough azimuth estimates. The proposed method can achieve automatic pairing of the 2-D DOA estimates. Simulation results show that our approach outperforms the existing methods based on L-shaped array.
{"title":"2-D DOA estimation of multiple signals based on sparse L-shaped array","authors":"Zhi Zheng, Yuxuan Yang, Wen-qin Wang, Guangjun Li, Jiao Yang, Yan Ge","doi":"10.1587/TRANSCOM.2017ISP0002","DOIUrl":"https://doi.org/10.1587/TRANSCOM.2017ISP0002","url":null,"abstract":"This paper proposes a novel method for two-dimensional (2-D) direction-of-arrival (DOA) estimation of multiple signals employing a sparse L-shaped array structured by a sparse linear array (SLA), a sparse uniform linear array (SULA) and an auxiliary sensor. In the proposed method, the elevation angles are estimated using the SLA and an improved MUSIC method. The azimuth angles are estimated by two stages. Firstly, the rough azimuth estimates are obtained by a cross-correlation matrix (CCM) of the array received data and the elevation estimates. Secondly, the fine azimuth estimates can be achieved using the SULA and the rough azimuth estimates. The proposed method can achieve automatic pairing of the 2-D DOA estimates. Simulation results show that our approach outperforms the existing methods based on L-shaped array.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121022089","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 : 2016-10-01DOI: 10.1587/COMEX.2016SPL0029
H. Nakajima, A. Hirota, N. Yoneda, H. Miyashita
A through-hole less microstrip line to waveguide transition is proposed in this paper. Conventional transitions are required through-holes in order to prevent unwanted emission in the substrate. However, the product cost of the transition is increased by making through-holes. In addition, the through-holes will be broken by heat deformation of the dielectric so that the characteristics of the transition may be deteriorated. Therefore, this paper replaces through-holes to quarter-wavelength open stubs in the transition. In this paper, our proposed transition is designed and the characteristics of that are analyzed. Moreover, the characteristics of our proposed transition are compared with the characteristics of the conventional one. The results show that our proposed transition can maintain the same characteristics as the conventional transition, reduce the product cost and increase the reliability of the transition for heat.
{"title":"Through-hole less microstrip line to waveguide transition with quarter-wavelength open stubs","authors":"H. Nakajima, A. Hirota, N. Yoneda, H. Miyashita","doi":"10.1587/COMEX.2016SPL0029","DOIUrl":"https://doi.org/10.1587/COMEX.2016SPL0029","url":null,"abstract":"A through-hole less microstrip line to waveguide transition is proposed in this paper. Conventional transitions are required through-holes in order to prevent unwanted emission in the substrate. However, the product cost of the transition is increased by making through-holes. In addition, the through-holes will be broken by heat deformation of the dielectric so that the characteristics of the transition may be deteriorated. Therefore, this paper replaces through-holes to quarter-wavelength open stubs in the transition. In this paper, our proposed transition is designed and the characteristics of that are analyzed. Moreover, the characteristics of our proposed transition are compared with the characteristics of the conventional one. The results show that our proposed transition can maintain the same characteristics as the conventional transition, reduce the product cost and increase the reliability of the transition for heat.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"9 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120828353","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 : 2016-10-01DOI: 10.1587/COMEX.2016SPL0043
R. Araki, K. Kamohara, H. Iwai, H. Sasaoka
The authors have proposed “Active Propagation Control” (APC) as a method to improve receiving transmission performance of a wireless communication channel. By APC, we can obtain better transmission performance by changing propagation characteristics actively in some ways, such as moving, rotating or transforming objects in the surrounding environment. In this paper, we evaluate the variation performance of the propagation characteristics of propagation control devices by indoor experiments to show the fundamental effectiveness of APC quantitatively.
{"title":"Performance evaluation of propagation control devices for active propagation control","authors":"R. Araki, K. Kamohara, H. Iwai, H. Sasaoka","doi":"10.1587/COMEX.2016SPL0043","DOIUrl":"https://doi.org/10.1587/COMEX.2016SPL0043","url":null,"abstract":"The authors have proposed “Active Propagation Control” (APC) as a method to improve receiving transmission performance of a wireless communication channel. By APC, we can obtain better transmission performance by changing propagation characteristics actively in some ways, such as moving, rotating or transforming objects in the surrounding environment. In this paper, we evaluate the variation performance of the propagation characteristics of propagation control devices by indoor experiments to show the fundamental effectiveness of APC quantitatively.","PeriodicalId":335039,"journal":{"name":"2016 International Symposium on Antennas and Propagation (ISAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114820495","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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