Pub Date : 2015-03-04DOI: 10.1109/IWAT.2015.7365380
Ping Lu, Xue‐Song Yang, Jia‐lin Li, Bing-Zhong Wang
A polarization reconfigurable rectenna, which consists of a polarization reconfigurable planar monopole antenna and a planar rectifying circuit, is proposed for microwave power transmission (MPT). The planar monopole is designed with one linear polarization (LP) and two circular polarizations (CPs). The rectifying circuit is connected to the antenna with a 50 Ohm microstrip line. The rectenna can harvest the RF power from 5.07 GHz to 5.86 GHz and convert it to DC power efficiently, exhibiting conversion efficiency from 40.2 % to 57.4 % with input power of 16.5 dBm. Simulated results are confirmed through the experiment.
{"title":"A polarization-reconfigurable rectenna for microwave power transmission","authors":"Ping Lu, Xue‐Song Yang, Jia‐lin Li, Bing-Zhong Wang","doi":"10.1109/IWAT.2015.7365380","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365380","url":null,"abstract":"A polarization reconfigurable rectenna, which consists of a polarization reconfigurable planar monopole antenna and a planar rectifying circuit, is proposed for microwave power transmission (MPT). The planar monopole is designed with one linear polarization (LP) and two circular polarizations (CPs). The rectifying circuit is connected to the antenna with a 50 Ohm microstrip line. The rectenna can harvest the RF power from 5.07 GHz to 5.86 GHz and convert it to DC power efficiently, exhibiting conversion efficiency from 40.2 % to 57.4 % with input power of 16.5 dBm. Simulated results are confirmed through the experiment.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131403699","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365307
Fan Yang
Reflectarray antenna attracts growing interests in the last decades. This paper presents some recent developments on reflectarray antennas, namely, a broadband reflectarray antenna and a beam-scanning reflectarray antenna. They demonstrate great potential in satellite communications, remote sensing, and radar applications.
{"title":"Wideband and beam-scanning reflectarrays","authors":"Fan Yang","doi":"10.1109/IWAT.2015.7365307","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365307","url":null,"abstract":"Reflectarray antenna attracts growing interests in the last decades. This paper presents some recent developments on reflectarray antennas, namely, a broadband reflectarray antenna and a beam-scanning reflectarray antenna. They demonstrate great potential in satellite communications, remote sensing, and radar applications.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125343623","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365316
K. Jang, M. K. Khattak, J. Jeon, H. Kim, S. Kahng, Louis J. Kim, Klaus B. Kim
This paper presents the design of high-frequency handheld beamforming antennas aimed at the 5th generation wireless communication and shows the frequency responses and radiation characteristics. It is revealed that the proposed four-element 24-GHz resonance array antenna fits the placement in the top side of a handset phone, and scans the upward 120o-range in the elevation plane with the movable main-beam of the antenna efficiency over 70 % and the peak-gain greater than 8 dBi up to 10.5 dBi at the aforementioned target millimeter-wave frequency.
{"title":"Handheld beamforming antennas adoptable to 5G wireless connectivity","authors":"K. Jang, M. K. Khattak, J. Jeon, H. Kim, S. Kahng, Louis J. Kim, Klaus B. Kim","doi":"10.1109/IWAT.2015.7365316","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365316","url":null,"abstract":"This paper presents the design of high-frequency handheld beamforming antennas aimed at the 5th generation wireless communication and shows the frequency responses and radiation characteristics. It is revealed that the proposed four-element 24-GHz resonance array antenna fits the placement in the top side of a handset phone, and scans the upward 120o-range in the elevation plane with the movable main-beam of the antenna efficiency over 70 % and the peak-gain greater than 8 dBi up to 10.5 dBi at the aforementioned target millimeter-wave frequency.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126542555","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365315
Y. She, M. Ameya, S. Kurokawa, J. Hirokawa, R. Suga, Y. Hirachi, S. Sasaki
This paper analysis the reasons of the uncertainty of the 60 GHz small antenna. A poorly fabricated example shows the reasons of the difference in performance between the expected antenna and the practical one. On the other hand, another example is measured by two different systems. The measured radiation patterns show the reasonable uncertainty factors in the measurement facilities.
{"title":"Analysis of the reasons of uncertainty in 60 GHz small antenna design and measurement","authors":"Y. She, M. Ameya, S. Kurokawa, J. Hirokawa, R. Suga, Y. Hirachi, S. Sasaki","doi":"10.1109/IWAT.2015.7365315","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365315","url":null,"abstract":"This paper analysis the reasons of the uncertainty of the 60 GHz small antenna. A poorly fabricated example shows the reasons of the difference in performance between the expected antenna and the practical one. On the other hand, another example is measured by two different systems. The measured radiation patterns show the reasonable uncertainty factors in the measurement facilities.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117252636","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365303
G. Byun, Dae-Heon Lee, H. Choo
This paper proposes the design of an arc-shaped patch antenna for GPS arrays that is composed of an arc-shaped patch with two parasitic elements. The antenna is then arranged in a three-element circular array with an inter-element spacing of about a quarter wavelength, and the isolation characteristics are further improved by inserting a slot to the ground plate. Detailed design parameters are optimized by using the GA, and reflection coefficient, axial ratio, and radiation gain are measured in a semi anechoic chamber. The results demonstrate that the antenna is suitable to be used for GPS antenna arrays with good circular polarization properties.
{"title":"Design of arc-shaped patch antenna arrays for GPS applications","authors":"G. Byun, Dae-Heon Lee, H. Choo","doi":"10.1109/IWAT.2015.7365303","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365303","url":null,"abstract":"This paper proposes the design of an arc-shaped patch antenna for GPS arrays that is composed of an arc-shaped patch with two parasitic elements. The antenna is then arranged in a three-element circular array with an inter-element spacing of about a quarter wavelength, and the isolation characteristics are further improved by inserting a slot to the ground plate. Detailed design parameters are optimized by using the GA, and reflection coefficient, axial ratio, and radiation gain are measured in a semi anechoic chamber. The results demonstrate that the antenna is suitable to be used for GPS antenna arrays with good circular polarization properties.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125324799","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365351
J. Tak, Jaehoon Choi
In this paper, an all-textile antenna with EBG structure for on-body communication is proposed. The proposed antenna consists of center-fed circular patch to generate TM01 mode wave and EBG structure around the patch to guide TM01 wave along the horizontal surface (θ = 90°). The EBG structure acts as an inductively reactive surface to support TM01 mode wave along the body surface. The proposed antenna is designed by using textile materials (conductive textile, conductive thread, and leather substrate) and has monopole-like radiation enhanced along the surface direction in 5.8 ISM GHz band. The proposed antenna has a radius of 50 mm (0.96 λ0 at 5.8 GHz) and a thickness of 3 mm (0.058 λ0 at 5.8 GHz). The antenna gain on the phantom surface (θ = 90°) is improved by 3.3 dB from -5.38 dBi without EBG ground to -2.08 dBi with EBG ground. The peak gain direction is increased from 30° to 75° and near broadside gain is suppressed about 9.6 dB (θ = 30°).
本文提出了一种具有EBG结构的全纺织体体通信天线。该天线由中心馈电圆形贴片组成，用于产生TM01模式波，贴片周围的EBG结构用于引导TM01波沿水平表面(θ = 90°)移动。EBG结构作为感应反应表面支持TM01模式波沿体表传播。该天线采用纺织材料(导电织物、导电线和皮革基材)设计，在5.8 ISM GHz频段具有沿表面方向增强的单极辐射。天线半径为50mm (5.8 GHz时为0.96 λ0)，天线厚度为3mm (5.8 GHz时为0.058 λ0)。天线在模面(θ = 90°)的增益从无EBG接地时的-5.38 dBi提高到有EBG接地时的-2.08 dBi，提高了3.3 dB。峰值增益方向从30°增加到75°，近宽侧增益被抑制约9.6 dB (θ = 30°)。
{"title":"An all-textile antenna with EBG structure for on-body communication","authors":"J. Tak, Jaehoon Choi","doi":"10.1109/IWAT.2015.7365351","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365351","url":null,"abstract":"In this paper, an all-textile antenna with EBG structure for on-body communication is proposed. The proposed antenna consists of center-fed circular patch to generate TM01 mode wave and EBG structure around the patch to guide TM01 wave along the horizontal surface (θ = 90°). The EBG structure acts as an inductively reactive surface to support TM01 mode wave along the body surface. The proposed antenna is designed by using textile materials (conductive textile, conductive thread, and leather substrate) and has monopole-like radiation enhanced along the surface direction in 5.8 ISM GHz band. The proposed antenna has a radius of 50 mm (0.96 λ0 at 5.8 GHz) and a thickness of 3 mm (0.058 λ0 at 5.8 GHz). The antenna gain on the phantom surface (θ = 90°) is improved by 3.3 dB from -5.38 dBi without EBG ground to -2.08 dBi with EBG ground. The peak gain direction is increased from 30° to 75° and near broadside gain is suppressed about 9.6 dB (θ = 30°).","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125554815","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365290
Jin-Seob Kang, Jeong-Hwan Kim, J. Park
A comparison of antenna parameters (i.e. antenna gain, radiation pattern and reflection coefficient) for R-band (1.7-2.6 GHz) and S-band (2.6-3.95 GHz) standard gain antennas has been performed between Korea Research Institute of Standards and Science (KRISS) and seven domestic participants including private companies and public organizations. Its purpose, as a proficiency test program of the `Antenna Measurement Club' of KRISS, was to check equivalences in antenna parameters measurements, particularly in R-/S-band, between KRISS and participants to support antenna manufacturers and end users in Korea. This comparison uses two traveling standards (i.e. R-/S-band pyramidal standard gain horn antennas) and measurement parameters are the power gain, radiation pattern and reflection coefficient of the traveling standards. Gain comparison method and extrapolation method are used in this comparison.
{"title":"Comparison of antenna parameters of R-/S-band standard gain antennas","authors":"Jin-Seob Kang, Jeong-Hwan Kim, J. Park","doi":"10.1109/IWAT.2015.7365290","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365290","url":null,"abstract":"A comparison of antenna parameters (i.e. antenna gain, radiation pattern and reflection coefficient) for R-band (1.7-2.6 GHz) and S-band (2.6-3.95 GHz) standard gain antennas has been performed between Korea Research Institute of Standards and Science (KRISS) and seven domestic participants including private companies and public organizations. Its purpose, as a proficiency test program of the `Antenna Measurement Club' of KRISS, was to check equivalences in antenna parameters measurements, particularly in R-/S-band, between KRISS and participants to support antenna manufacturers and end users in Korea. This comparison uses two traveling standards (i.e. R-/S-band pyramidal standard gain horn antennas) and measurement parameters are the power gain, radiation pattern and reflection coefficient of the traveling standards. Gain comparison method and extrapolation method are used in this comparison.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128828890","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365364
H. Ryu, Bong-Jun Kim
In this study, we like to show the beam space multiple-input and multiple-output orthogonal frequency division multiplexing (BS MIMO-OFDM) system based on the electronic steerable parasitic array radiator (ESPAR) antenna. This BS MIMO-OFDMMO transmission uses a single active antenna compared to the conventional MIMO transmission which requires multiple antennas to get multiplexing gain. For this reason, the hardware complexity of this system is reduced compared to the conventional MIMO system. Also, it is possible to miniaturize the antenna size. This paper proposes the transmitter and receiver structure for BS MIMO-OFDM system and analyzes the system performance. The proposed system has small degradation of BER performance. When the power of transmitted OFDM signal is low, the miss detection probability at the receiver occurs. In order to prevent this phenomenon, this paper would like to improve BER performance of BS-MIMO system by setting thresholds on the transmission power of an OFDM signal.
{"title":"Beam space MIMO-OFDM system based on ESPAR antenna","authors":"H. Ryu, Bong-Jun Kim","doi":"10.1109/IWAT.2015.7365364","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365364","url":null,"abstract":"In this study, we like to show the beam space multiple-input and multiple-output orthogonal frequency division multiplexing (BS MIMO-OFDM) system based on the electronic steerable parasitic array radiator (ESPAR) antenna. This BS MIMO-OFDMMO transmission uses a single active antenna compared to the conventional MIMO transmission which requires multiple antennas to get multiplexing gain. For this reason, the hardware complexity of this system is reduced compared to the conventional MIMO system. Also, it is possible to miniaturize the antenna size. This paper proposes the transmitter and receiver structure for BS MIMO-OFDM system and analyzes the system performance. The proposed system has small degradation of BER performance. When the power of transmitted OFDM signal is low, the miss detection probability at the receiver occurs. In order to prevent this phenomenon, this paper would like to improve BER performance of BS-MIMO system by setting thresholds on the transmission power of an OFDM signal.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129043275","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365341
H. Nakano, K. Anjo, J. Yamauchi
The radiation from a metamaterial-based two-arm spiral antenna is investigated, where the phase relationship of the excitation sources for the two arms (deviation phase) is varied to cause unbalanced-mode excitation. It is found that the radiation field in the antenna-axis direction decreases by 1-dB when the deviation phase reaches approximately 60 degrees.
{"title":"Metamaterial-based spiral antenna with unbalanced excitation","authors":"H. Nakano, K. Anjo, J. Yamauchi","doi":"10.1109/IWAT.2015.7365341","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365341","url":null,"abstract":"The radiation from a metamaterial-based two-arm spiral antenna is investigated, where the phase relationship of the excitation sources for the two arms (deviation phase) is varied to cause unbalanced-mode excitation. It is found that the radiation field in the antenna-axis direction decreases by 1-dB when the deviation phase reaches approximately 60 degrees.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121280125","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365282
Rupam Das, H. Yoo
In this paper, we address the telemetry and wireless powering problems associated with the recently invented leadless pacemaker. To overcome the telemetry problem, we propose a conformal spiral type Implantable antenna at Medical Implanted Communication Service (MICS) band. In addition, we also apply the recently proposed midfield wireless power transfer (WPT) technique at 1.5 GHz to avoid the bulky energy storage component. We simulate and experimentally measure the performance of the implantable antenna by using porcine heart tissue. Our research shows that, the implantable antenna and wireless power transfer scheme can be implemented in a leadless pacemaker without any significant coupling between them.
{"title":"Wireless power transfer and biotelemetry in a leadless pacemaker","authors":"Rupam Das, H. Yoo","doi":"10.1109/IWAT.2015.7365282","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365282","url":null,"abstract":"In this paper, we address the telemetry and wireless powering problems associated with the recently invented leadless pacemaker. To overcome the telemetry problem, we propose a conformal spiral type Implantable antenna at Medical Implanted Communication Service (MICS) band. In addition, we also apply the recently proposed midfield wireless power transfer (WPT) technique at 1.5 GHz to avoid the bulky energy storage component. We simulate and experimentally measure the performance of the implantable antenna by using porcine heart tissue. Our research shows that, the implantable antenna and wireless power transfer scheme can be implemented in a leadless pacemaker without any significant coupling between them.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132011862","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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