Pub Date : 2017-07-06DOI: 10.1109/GSMM.2017.7970322
Y. Yang, X. Zhu, Q. Xue
In this paper, the millimeter-wave circuit miniaturization techniques using BCMLR and interdigital resonators are introduced. Using these structures, the physical size of the on-chip filter can be dramatically reduced. The designed BPFs are implemented in standard 0.13-μm SiGe and 0.1-μm GaAs technologies for concept approval. Compared with other state-of-the-art work at millimeter-wave frequencies, our proposed designs have the merits of ultra-compact size as small as 0.038 mm2, competitive insertion loss (1 dB in GaAs BPF) and harmonic suppression of more than 44 dB.
{"title":"On-chip circuit miniaturization techniques for millimeter-wave bandpass filter design","authors":"Y. Yang, X. Zhu, Q. Xue","doi":"10.1109/GSMM.2017.7970322","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970322","url":null,"abstract":"In this paper, the millimeter-wave circuit miniaturization techniques using BCMLR and interdigital resonators are introduced. Using these structures, the physical size of the on-chip filter can be dramatically reduced. The designed BPFs are implemented in standard 0.13-μm SiGe and 0.1-μm GaAs technologies for concept approval. Compared with other state-of-the-art work at millimeter-wave frequencies, our proposed designs have the merits of ultra-compact size as small as 0.038 mm2, competitive insertion loss (1 dB in GaAs BPF) and harmonic suppression of more than 44 dB.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116868129","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 : 2017-07-06DOI: 10.1109/GSMM.2017.7970292
Jianfang Zheng, J. Ala-Laurinaho, A. Alastalo, T. Mäkelä, A. Sneck, A. Räisänen
We investigate the applicability of roll-to-roll reverse offset printing for fabrication of millimeter-wave antennas on flexible substrates. The aim is to find a fabrication method for mass production of such antennas; therefore, attention should be paid on such factors as cost, efficiency, and reliable performance of the printed antennas.
{"title":"Studies on applicability of reverse offset in printing millimeter-wave antennas on flexible substrates","authors":"Jianfang Zheng, J. Ala-Laurinaho, A. Alastalo, T. Mäkelä, A. Sneck, A. Räisänen","doi":"10.1109/GSMM.2017.7970292","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970292","url":null,"abstract":"We investigate the applicability of roll-to-roll reverse offset printing for fabrication of millimeter-wave antennas on flexible substrates. The aim is to find a fabrication method for mass production of such antennas; therefore, attention should be paid on such factors as cost, efficiency, and reliable performance of the printed antennas.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128323819","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 : 2017-07-06DOI: 10.1109/GSMM.2017.7970316
J. Ala-Laurinaho, V. Semkin, H. Kähkönen, V. Viikari, A. Räisänen
This paper presents components based on metallic dielectric-filled waveguides (DFWG) for antenna arrays. Air-filled waveguide feeding networks have low losses but the spacing between the elements of the array cannot be half-a-wavelength which is required for the grating lobe free radiation patterns. By filling the waveguides with dielectric material, the physical dimensions can be decreased. Three prototypes are developed for the lower E-band (71–76 GHz): a transition from DFWG to the standard WR-12 waveguide, a single antenna element based on the DFWG, and a 1×4 linear antenna array. The prototypes are manufactured and measured. The measured insertion loss of the structure with two transitions is 1.3–2 dB at the desired frequency range. The measured realised gain for the single element is 7–9 dBi at the desired band.
{"title":"Millimeter wave antenna array based on dielectric-filled waveguides","authors":"J. Ala-Laurinaho, V. Semkin, H. Kähkönen, V. Viikari, A. Räisänen","doi":"10.1109/GSMM.2017.7970316","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970316","url":null,"abstract":"This paper presents components based on metallic dielectric-filled waveguides (DFWG) for antenna arrays. Air-filled waveguide feeding networks have low losses but the spacing between the elements of the array cannot be half-a-wavelength which is required for the grating lobe free radiation patterns. By filling the waveguides with dielectric material, the physical dimensions can be decreased. Three prototypes are developed for the lower E-band (71–76 GHz): a transition from DFWG to the standard WR-12 waveguide, a single antenna element based on the DFWG, and a 1×4 linear antenna array. The prototypes are manufactured and measured. The measured insertion loss of the structure with two transitions is 1.3–2 dB at the desired frequency range. The measured realised gain for the single element is 7–9 dBi at the desired band.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123572764","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 presents a 38 GHz power amplifier for the fifth generation mobile networks (5G) using 0.15 µm enhancement mode (E-mode) GaAs pHEMT technology. This proposed 3-stage PA consists of two driver stages, and one power stage with combining four power devices. It has 24.7 dB small signal gain and can achieve a saturated output power (Psat) of 28.1dBm and 1-dB compression output power (OP1dB) of 27.1 dBm with peak power-added efficiency (PAE) of 28% under 4V supply voltage. This chip occupies an area of 3.75 mm2.
{"title":"A 38GHz 27dBm power amplifier in enhancement mode GaAs PHEMT technology","authors":"Hamed Alsuraisry, Teng-Yuan Chang, Jeng‐Han Tsai, Tian-Wei Huang","doi":"10.1109/GSMM.2017.7970328","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970328","url":null,"abstract":"This paper presents a 38 GHz power amplifier for the fifth generation mobile networks (5G) using 0.15 µm enhancement mode (E-mode) GaAs pHEMT technology. This proposed 3-stage PA consists of two driver stages, and one power stage with combining four power devices. It has 24.7 dB small signal gain and can achieve a saturated output power (Psat) of 28.1dBm and 1-dB compression output power (OP1dB) of 27.1 dBm with peak power-added efficiency (PAE) of 28% under 4V supply voltage. This chip occupies an area of 3.75 mm2.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121643341","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 : 2017-07-06DOI: 10.1109/GSMM.2017.7970319
Wei Lin, R. Ziolkowski
A simple, compact, omni-directional, circularly-polarized (CP) millimeter-wave antenna for Device-to-Device (D2D) communications in the next generation (5G) cellular systems is reported. It is a CP omni-directional antenna operating at 28 GHz for mobile terminals. The antenna combines a vertical electric monopole element with four magnetic elements to coherently excite parallel electric and magnetic dipoles. This combination generates the omni-directional CP radiation. The overlapping −10-dB impedance and 3-dB axial ratio (AR) bandwidth is from 27 to 28.5 GHz, which covers the 28 GHz frequency band proposed for 5G mobile cellular networks (i.e., from 27.5 to 28.35 GHz). The antenna has an omni-directional radiation pattern at 28 GHz whose peak realized RHCP gain is 2.08 dBic and whose 3-dB AR beamwidth is wide, from elevation angles 3° to 136°. Mass production of the antenna is possible by PCB manufacturing technologies. The overall size is 3.44 mm × 3.44 mm × 1 mm (ka = 1.1017). Consequently, it could be embedded in many current popular, smart wireless devices such as cell phones, laptops, digital watches, and smart glasses as well as their future versions for operation in 5G cellular networks.
报道了一种用于下一代(5G)蜂窝系统中设备对设备(D2D)通信的简单、紧凑、全向、圆极化(CP)毫米波天线。它是一种工作频率为28ghz的CP全向天线，用于移动终端。该天线将一个垂直电单极子元件与四个磁元件相结合，以相干激发平行电偶极子和磁偶极子。这种组合产生了全方位的CP辐射。−10db阻抗和3db轴比(AR)重叠带宽为27 ~ 28.5 GHz，覆盖了5G移动蜂窝网络建议的28 GHz频段(即27.5 ~ 28.35 GHz)。该天线具有28ghz全向辐射方向图，峰值实现RHCP增益为2.08 dBic, 3db AR波束宽度宽，仰角为3°~ 136°。通过PCB制造技术，天线的大规模生产成为可能。整体尺寸为3.44 mm × 3.44 mm × 1mm (ka = 1.1017)。因此，它可以嵌入到许多当前流行的智能无线设备中，如手机、笔记本电脑、数字手表和智能眼镜，以及它们未来在5G蜂窝网络中运行的版本。
{"title":"Compact, omni-directional, circularly-polarized mm-Wave antenna for device-to-device (D2D) communications in future 5G cellular systems","authors":"Wei Lin, R. Ziolkowski","doi":"10.1109/GSMM.2017.7970319","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970319","url":null,"abstract":"A simple, compact, omni-directional, circularly-polarized (CP) millimeter-wave antenna for Device-to-Device (D2D) communications in the next generation (5G) cellular systems is reported. It is a CP omni-directional antenna operating at 28 GHz for mobile terminals. The antenna combines a vertical electric monopole element with four magnetic elements to coherently excite parallel electric and magnetic dipoles. This combination generates the omni-directional CP radiation. The overlapping −10-dB impedance and 3-dB axial ratio (AR) bandwidth is from 27 to 28.5 GHz, which covers the 28 GHz frequency band proposed for 5G mobile cellular networks (i.e., from 27.5 to 28.35 GHz). The antenna has an omni-directional radiation pattern at 28 GHz whose peak realized RHCP gain is 2.08 dBic and whose 3-dB AR beamwidth is wide, from elevation angles 3° to 136°. Mass production of the antenna is possible by PCB manufacturing technologies. The overall size is 3.44 mm × 3.44 mm × 1 mm (ka = 1.1017). Consequently, it could be embedded in many current popular, smart wireless devices such as cell phones, laptops, digital watches, and smart glasses as well as their future versions for operation in 5G cellular networks.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131189227","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 : 2017-05-24DOI: 10.1109/GSMM.2017.7970281
Baoping Ren, Haiwen Liu, Pin Wen, X. Guan, Zhewang Ma
A compact dual-mode hairpin ring resonator (HRR) is proposed to implement dual-band superconducting bandpass filter (BPF) in this paper. Non-coupled and controllable dual-mode resonant characteristics of the proposed HRR are analyzed. Moreover, HRR can be easily extended to high-order filter design because of its unique structural characteristics. For demonstration, a fourth-order dual-band superconducting BPF is designed by using four coupled HRRs. Coupling structure for the adjacent HRRs with inverse orientation is used to excite multiple transmission zeros for high selectivity. The finally obtained fourth-order dual-band filter operating at 1.9 GHz and 2.6 GHz has desired frequency responses and compact size.
{"title":"Design of fourth-order dual-band superconducting filter using dual-mode resonator","authors":"Baoping Ren, Haiwen Liu, Pin Wen, X. Guan, Zhewang Ma","doi":"10.1109/GSMM.2017.7970281","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970281","url":null,"abstract":"A compact dual-mode hairpin ring resonator (HRR) is proposed to implement dual-band superconducting bandpass filter (BPF) in this paper. Non-coupled and controllable dual-mode resonant characteristics of the proposed HRR are analyzed. Moreover, HRR can be easily extended to high-order filter design because of its unique structural characteristics. For demonstration, a fourth-order dual-band superconducting BPF is designed by using four coupled HRRs. Coupling structure for the adjacent HRRs with inverse orientation is used to excite multiple transmission zeros for high selectivity. The finally obtained fourth-order dual-band filter operating at 1.9 GHz and 2.6 GHz has desired frequency responses and compact size.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126226134","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 : 2017-05-24DOI: 10.1109/GSMM.2017.7970280
M. Hussein, Yi Huang, Bahaa Al-Juboori, Jiafeng Zhou
This paper proposes a new method to implement Frequency Selective Surfaces (FSSs) with sharp band edge transitions suitable for millimetres wave applications. A bandpass FSS can be realized by combining two bandstop FSS structures on the same plane. By choosing appropriate dimensions of the structures, the passbands and stopbands of the FSS can be controlled to obtain desired characteristics. With this method, multiple passbands and stopbands of an FSS can be achieved simultaneously. A prototype FSS is designed at the Ka band. The FSS is fabricated and then tested in free space to verify the proposed design. The structure is polarization independent and has a very low insertion loss at around 40 GHz.
{"title":"A multi-band high selectivity frequency selective surface for ka-band applications","authors":"M. Hussein, Yi Huang, Bahaa Al-Juboori, Jiafeng Zhou","doi":"10.1109/GSMM.2017.7970280","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970280","url":null,"abstract":"This paper proposes a new method to implement Frequency Selective Surfaces (FSSs) with sharp band edge transitions suitable for millimetres wave applications. A bandpass FSS can be realized by combining two bandstop FSS structures on the same plane. By choosing appropriate dimensions of the structures, the passbands and stopbands of the FSS can be controlled to obtain desired characteristics. With this method, multiple passbands and stopbands of an FSS can be achieved simultaneously. A prototype FSS is designed at the Ka band. The FSS is fabricated and then tested in free space to verify the proposed design. The structure is polarization independent and has a very low insertion loss at around 40 GHz.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126080705","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 : 2017-05-24DOI: 10.1109/GSMM.2017.7970277
Hong-Xu Zhu, Pedro Cheong, K. Tam
In this paper, the resistor effect on isolation bandwidth of a compact Wilkinson power divider is studied. The discussion is based on an equal modified compact power divider on RO4003, with center frequency of 2.4 GHz. In this compact power divider, stepped impedance interdigital coupling sections were introduced to replace the quarter wavelength impedance transformer of Wilkinson power divider to realize the bandpass filtering capability. The theoretical analysis, simulation and measurement results are also discussed in this paper.
{"title":"Analysis of isolation bandwidth of miniaturized wilkinson power divider","authors":"Hong-Xu Zhu, Pedro Cheong, K. Tam","doi":"10.1109/GSMM.2017.7970277","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970277","url":null,"abstract":"In this paper, the resistor effect on isolation bandwidth of a compact Wilkinson power divider is studied. The discussion is based on an equal modified compact power divider on RO4003, with center frequency of 2.4 GHz. In this compact power divider, stepped impedance interdigital coupling sections were introduced to replace the quarter wavelength impedance transformer of Wilkinson power divider to realize the bandpass filtering capability. The theoretical analysis, simulation and measurement results are also discussed in this paper.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"2004 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123764038","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 : 2017-05-24DOI: 10.1109/GSMM.2017.7970289
M. Jarrahi
In the first part of this talk, I will give an overview of the unique applications of terahertz waves for chemical identification, material characterization, biomedical sensing and diagnostics and describe the state of the existing terahertz sensors. In the second part of the talk, I will introduce a game changing technology that enables high performance, low cost, and compact terahertz spectroscopy and imaging systems for various applications. More specifically, I will introduce a new generation of optically driven terahertz sources and detectors that offer three orders of magnitude higher terahertz radiation power levels and two orders of magnitude higher terahertz detection sensitivity levels compared to the existing technologies. This leap-frog performance enhancement is achieved by funneling the laser light through specifically engineered metallic nanostructures into the device active area, enhancing light matter interaction at nanoscale. Moreover, this technology is optimized for operation at near infrared optical wavelengths, where very high performance, compact and cost-effective optical sources are commercially available, paving the way to compact and low-cost terahertz sensors that could offer numerous opportunities for e.g., medical imaging and diagnostics, atmospheric sensing, pharmaceutical quality control, and security screening systems.
{"title":"Keynote speech 3: Plasmonic terahertz optoelectronics for advanced terahertz imaging and sensing","authors":"M. Jarrahi","doi":"10.1109/GSMM.2017.7970289","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970289","url":null,"abstract":"In the first part of this talk, I will give an overview of the unique applications of terahertz waves for chemical identification, material characterization, biomedical sensing and diagnostics and describe the state of the existing terahertz sensors. In the second part of the talk, I will introduce a game changing technology that enables high performance, low cost, and compact terahertz spectroscopy and imaging systems for various applications. More specifically, I will introduce a new generation of optically driven terahertz sources and detectors that offer three orders of magnitude higher terahertz radiation power levels and two orders of magnitude higher terahertz detection sensitivity levels compared to the existing technologies. This leap-frog performance enhancement is achieved by funneling the laser light through specifically engineered metallic nanostructures into the device active area, enhancing light matter interaction at nanoscale. Moreover, this technology is optimized for operation at near infrared optical wavelengths, where very high performance, compact and cost-effective optical sources are commercially available, paving the way to compact and low-cost terahertz sensors that could offer numerous opportunities for e.g., medical imaging and diagnostics, atmospheric sensing, pharmaceutical quality control, and security screening systems.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115854664","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 : 2017-05-24DOI: 10.1109/GSMM.2017.7970291
Yong-xin Guo, Bing Zhang, Rongqiang Li
This paper presents the design of a D-band (110–170 GHz) iris bandpass filter (BPF) for 3-D printing fabrication. Taking the advantage of the 3-D Mask Printing technology, the dimensional tolerance and surface roughness are much improved compared with the Selective Laser Melting (SLM) printed filter. The 3-D Mask Printed filter has a passband 144–146 GHz (|S11|<−18 dB) with in-band insertion loss than 0.6 dB. The measured results will be reported at the conference.
{"title":"A metallic 3-D mask printed D-band iris bandpass filter","authors":"Yong-xin Guo, Bing Zhang, Rongqiang Li","doi":"10.1109/GSMM.2017.7970291","DOIUrl":"https://doi.org/10.1109/GSMM.2017.7970291","url":null,"abstract":"This paper presents the design of a D-band (110–170 GHz) iris bandpass filter (BPF) for 3-D printing fabrication. Taking the advantage of the 3-D Mask Printing technology, the dimensional tolerance and surface roughness are much improved compared with the Selective Laser Melting (SLM) printed filter. The 3-D Mask Printed filter has a passband 144–146 GHz (|S11|<−18 dB) with in-band insertion loss than 0.6 dB. The measured results will be reported at the conference.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122378917","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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