Pub Date : 2016-09-01DOI: 10.1109/MECAP.2016.7790108
A. Mahdi, A. Sobih, Magdy A. El-Kafafi
In this paper, the design of a 10W, highly linear, wideband and efficient power amplifier is introduced. The design is based on Cree's CGH40010F GaN HEMT biased in class AB. The amplifier's high linearity is ensured through the use of a fourth order Chebyshev low filter as the output matching network which serves to get rid of higher order harmonics as well as any resulting out of band intermodulation products. At an output power of 40 dBm, the designed amplifier achieves a wide bandwidth extending from 1 to 2.5 GHz (85% fractional bandwidth), while maintaing a high power added efficiency (PAE) ranging from 48-55% across the entire operation bandwidth. Furthermore, the achieved amplifier output IP2 and IP3 are 47 and 76 dBm, respectively.
本文介绍了一种10W、高线性、宽带、高效功率放大器的设计。该设计基于Cree的CGH40010F GaN HEMT偏置在AB类。放大器的高线性度是通过使用四阶切比雪夫低滤波器作为输出匹配网络来确保的，该网络用于消除高阶谐波以及任何导致的带外互调产品。在输出功率为40 dBm时，设计的放大器实现了从1到2.5 GHz的宽带宽(85%的分数带宽)，同时在整个工作带宽内保持了48-55%的高功率附加效率(PAE)。此外，实现的放大器输出IP2和IP3分别为47和76 dBm。
{"title":"Design and implementationof 10W, highly linear, wideband and efficient power amplifier using harmonic termination","authors":"A. Mahdi, A. Sobih, Magdy A. El-Kafafi","doi":"10.1109/MECAP.2016.7790108","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790108","url":null,"abstract":"In this paper, the design of a 10W, highly linear, wideband and efficient power amplifier is introduced. The design is based on Cree's CGH40010F GaN HEMT biased in class AB. The amplifier's high linearity is ensured through the use of a fourth order Chebyshev low filter as the output matching network which serves to get rid of higher order harmonics as well as any resulting out of band intermodulation products. At an output power of 40 dBm, the designed amplifier achieves a wide bandwidth extending from 1 to 2.5 GHz (85% fractional bandwidth), while maintaing a high power added efficiency (PAE) ranging from 48-55% across the entire operation bandwidth. Furthermore, the achieved amplifier output IP2 and IP3 are 47 and 76 dBm, respectively.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115467685","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790084
A. Siblini, H. Abou Taam, B. Jecko, M. Rammal, A. Bellion
This paper presents a circularly polarized antenna based on new electromagnetic band-gap material antenna approach called pixel. The pixel concept was published in many papers concerning the agile radiating matrix antenna. In this paper we study the pixel generating circularly polarized field. This study will be the main step to introduce agility in beam forming of the matrix antenna for the space applications. Also a comparison between the pixel and patch antenna is done.
{"title":"Wideband circularly polarized pixel antenna using special EBG approach: Building of agile antenna ARMA for space applications","authors":"A. Siblini, H. Abou Taam, B. Jecko, M. Rammal, A. Bellion","doi":"10.1109/MECAP.2016.7790084","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790084","url":null,"abstract":"This paper presents a circularly polarized antenna based on new electromagnetic band-gap material antenna approach called pixel. The pixel concept was published in many papers concerning the agile radiating matrix antenna. In this paper we study the pixel generating circularly polarized field. This study will be the main step to introduce agility in beam forming of the matrix antenna for the space applications. Also a comparison between the pixel and patch antenna is done.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124767190","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790083
S. S. Jehangir, M. Sharawi
A wide-band Quasi-Yagi antenna with loop excitation and a performance comparison between a dipole based Quasi-Yagi are presented, targeting the 5.8 GHz band. The proposed Quasi-Yagi antenna with loop excitation has a very wide measured bandwidth of 1.43 GHz which covers from 5.574-7 GHz. It has a very high Front-to-back ratio (FBR) of 18.7 dB with a ground size of 11 mm. The proposed antenna has a gain of 4.7 dBi, overall size of 60 × 60 mm2, and efficiency of 93%. The dipole based Quasi-Yagi antenna has a minimum measured bandwidth of 963 MHz and minimum FBR of 12 dB with a ground size of 18.6 mm. It has a gain of 3.56 dBi, overall size of 30 × 25 mm2, and efficiency of 73%. The superior efficiency, bandwidth, gain and FBR performance of the loop excited one comes at the cost of 79% larger size.
{"title":"A comparison between two different excitations for Quasi-Yagi antennas","authors":"S. S. Jehangir, M. Sharawi","doi":"10.1109/MECAP.2016.7790083","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790083","url":null,"abstract":"A wide-band Quasi-Yagi antenna with loop excitation and a performance comparison between a dipole based Quasi-Yagi are presented, targeting the 5.8 GHz band. The proposed Quasi-Yagi antenna with loop excitation has a very wide measured bandwidth of 1.43 GHz which covers from 5.574-7 GHz. It has a very high Front-to-back ratio (FBR) of 18.7 dB with a ground size of 11 mm. The proposed antenna has a gain of 4.7 dBi, overall size of 60 × 60 mm2, and efficiency of 93%. The dipole based Quasi-Yagi antenna has a minimum measured bandwidth of 963 MHz and minimum FBR of 12 dB with a ground size of 18.6 mm. It has a gain of 3.56 dBi, overall size of 30 × 25 mm2, and efficiency of 73%. The superior efficiency, bandwidth, gain and FBR performance of the loop excited one comes at the cost of 79% larger size.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128692290","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790118
A. F. Daw, M. Abdalla, H. Elhennawy
A new compact multiband resonator based on one modified cell of dual-composite right/left-handed microstrip structure is presented in this paper. This introduced topology proposes triple band for 7.4 GHz, 9.2 GHz, and 13 GHz with insertion loss 2.3 dB, 0.6 dB, and 0.55 dB, respectively. Moreover, the return losses are equal 13 dB, 43 dB, and 10 dB, respectively. The paper elaborates the equivalent circuit model, analytical study and 3D full-wave simulation. Furthermore, the design realizes compactness size (13.2 × 5.9 mm2). The quality factor demonstrates selectivity equals 35, 8.18, and 48.1 at the four bands, respectively.
{"title":"New configuration for multiband ultra compact gap resonator based D-CRLH","authors":"A. F. Daw, M. Abdalla, H. Elhennawy","doi":"10.1109/MECAP.2016.7790118","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790118","url":null,"abstract":"A new compact multiband resonator based on one modified cell of dual-composite right/left-handed microstrip structure is presented in this paper. This introduced topology proposes triple band for 7.4 GHz, 9.2 GHz, and 13 GHz with insertion loss 2.3 dB, 0.6 dB, and 0.55 dB, respectively. Moreover, the return losses are equal 13 dB, 43 dB, and 10 dB, respectively. The paper elaborates the equivalent circuit model, analytical study and 3D full-wave simulation. Furthermore, the design realizes compactness size (13.2 × 5.9 mm2). The quality factor demonstrates selectivity equals 35, 8.18, and 48.1 at the four bands, respectively.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128920218","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790081
H. Haddad, R. Loison, R. Gillard, A. Jrad, A. Harmouch
In this paper, the design of compressed retrodirective reflectors via transformation optics is addressed. The proposed method enables a compressed reflector to perform as a classical retrodirective corner reflector while having a much lower profile. Using a simple linear coordinate transformation, the lower profile can be achieved with a TO domain in the reflector consisting of anisotropic homogeneous media. The proposed design is validated at f0=8GHz by full wave electromagnetic simulations. Furthermore, using the Effective Medium Theory approach, the practical feasibility of the involved medium distribution is discussed and verified. The results of the investigations could be of interest in different radar, communication and identification applications.
{"title":"Compression technique for retrodirective reflectors using transformation optics","authors":"H. Haddad, R. Loison, R. Gillard, A. Jrad, A. Harmouch","doi":"10.1109/MECAP.2016.7790081","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790081","url":null,"abstract":"In this paper, the design of compressed retrodirective reflectors via transformation optics is addressed. The proposed method enables a compressed reflector to perform as a classical retrodirective corner reflector while having a much lower profile. Using a simple linear coordinate transformation, the lower profile can be achieved with a TO domain in the reflector consisting of anisotropic homogeneous media. The proposed design is validated at f0=8GHz by full wave electromagnetic simulations. Furthermore, using the Effective Medium Theory approach, the practical feasibility of the involved medium distribution is discussed and verified. The results of the investigations could be of interest in different radar, communication and identification applications.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125346971","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790110
S. I. El-Henawy, A. Safwat, H. El-Hennawy
A reconfigurable radiation pattern loop antenna is presented in this paper. The loop antenna operates at 2.4 GHz (WLAN/ Bluetooth /LTE/UMTS) having an omnidirectional radiation pattern in the antenna plane. The reconfigurability is achieved using; primary loop antenna that is surrounded by secondary ones which are used to cancel the current and hence the radiation pattern in their direction. Accordingly, the radiation pattern can be altered from an omnidirectional to a directional one by controlling the secondary antennas.
提出了一种可重构辐射方向图环路天线。环形天线工作在2.4 GHz (WLAN/ Bluetooth /LTE/UMTS)，在天线平面上具有全向辐射模式。可重构性通过使用;主环路天线被次级环路天线包围，次级环路天线用来抵消电流，从而抵消它们方向上的辐射方向图。因此，可以通过控制次级天线将辐射方向图从全向方向图改变为定向方向图。
{"title":"Reconfigurable pattern beam steering loop antenna","authors":"S. I. El-Henawy, A. Safwat, H. El-Hennawy","doi":"10.1109/MECAP.2016.7790110","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790110","url":null,"abstract":"A reconfigurable radiation pattern loop antenna is presented in this paper. The loop antenna operates at 2.4 GHz (WLAN/ Bluetooth /LTE/UMTS) having an omnidirectional radiation pattern in the antenna plane. The reconfigurability is achieved using; primary loop antenna that is surrounded by secondary ones which are used to cancel the current and hence the radiation pattern in their direction. Accordingly, the radiation pattern can be altered from an omnidirectional to a directional one by controlling the secondary antennas.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133531451","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790123
Khaled Hasan, M. El hadidy, H. Morsi
The main objective of this paper is to design a very directive reflectarray antenna (RA) for biomedical imaging applications and breast cancer detection. The RA consists of a horn antenna as a feeder and a reflection surface based on double ring (DR) unit cell that achieves 350° phase range at a resonant frequency of 2.2 GHz. The designed RA is a pencil beam antenna with a high directivity gain of 19.6 dBi, small Half-Power-Beamwidth (HPBW) of and low Side-Lobe Level (SLL) of -15.9 dB compared to the horn antenna with a directivity gain of 6.5 dBi, HPBW of 109° and Side-Lobe Level of -12.3 dB. A fair comparison between the RA and the horn antenna is presented based on a 3D EM simulation with respect to Bio Tissue/Fat material box and human breast model as well. The designed RA achieves larger penetration depth and smaller power loss density/specific absorption rate (PLD/SAR) comparing with the horn antenna. Furthermore, it provides a higher resolution and a smaller angular scanning capability.
{"title":"Reflectarray antenna for breast cancer detection and biomedical applications","authors":"Khaled Hasan, M. El hadidy, H. Morsi","doi":"10.1109/MECAP.2016.7790123","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790123","url":null,"abstract":"The main objective of this paper is to design a very directive reflectarray antenna (RA) for biomedical imaging applications and breast cancer detection. The RA consists of a horn antenna as a feeder and a reflection surface based on double ring (DR) unit cell that achieves 350° phase range at a resonant frequency of 2.2 GHz. The designed RA is a pencil beam antenna with a high directivity gain of 19.6 dBi, small Half-Power-Beamwidth (HPBW) of and low Side-Lobe Level (SLL) of -15.9 dB compared to the horn antenna with a directivity gain of 6.5 dBi, HPBW of 109° and Side-Lobe Level of -12.3 dB. A fair comparison between the RA and the horn antenna is presented based on a 3D EM simulation with respect to Bio Tissue/Fat material box and human breast model as well. The designed RA achieves larger penetration depth and smaller power loss density/specific absorption rate (PLD/SAR) comparing with the horn antenna. Furthermore, it provides a higher resolution and a smaller angular scanning capability.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114176551","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790098
F. Mazeh, H. Ayad, F. Ndadijimana, G. Faour, M. Fadlallah, J. Jomaah
This paper presents a step-by-step procedure to extract the effective permittivity of dry and wet snow in an electromagnetic simulator. The S-parameters are extracted using HFSS (High Frequency Structure Simulator), which is a Finite Element Method (FEM) full wave simulator. The permittivity curve is calculated using the S21 retrieval method. The calculated permittivity is compared with theoretical mixture models (Maxwell Garnett and Bruggeman Symmetric) with a verification that it lies between the effective permittivity theoretical bounds.
本文介绍了在电磁模拟器中逐步提取干雪和湿雪有效介电常数的方法。利用有限元全波模拟器HFSS (High Frequency Structure Simulator)提取s参数。利用S21反演法计算了介电常数曲线。将计算得到的介电常数与理论混合模型(Maxwell Garnett和Bruggeman对称)进行了比较，证实介电常数位于有效介电常数理论边界之间。
{"title":"Effective permittivity of snow for radar detection: Numerical validation by the fem method","authors":"F. Mazeh, H. Ayad, F. Ndadijimana, G. Faour, M. Fadlallah, J. Jomaah","doi":"10.1109/MECAP.2016.7790098","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790098","url":null,"abstract":"This paper presents a step-by-step procedure to extract the effective permittivity of dry and wet snow in an electromagnetic simulator. The S-parameters are extracted using HFSS (High Frequency Structure Simulator), which is a Finite Element Method (FEM) full wave simulator. The permittivity curve is calculated using the S21 retrieval method. The calculated permittivity is compared with theoretical mixture models (Maxwell Garnett and Bruggeman Symmetric) with a verification that it lies between the effective permittivity theoretical bounds.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"114 Suppl 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125881725","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790113
M. Bagheriasl, K. Mohammadpour‐Aghdam, R. Faraji-Dana
This paper presents a systematic and efficient approach for design of a dual-mode antenna. In this approach, characteristic mode analysis is performed on the antenna structure to assess the suitability of the proposed structure for wideband dual-mode operation. After its suitability is assessed, a parametric study is performed on characteristic modes of the structure to extract some guidelines for the antenna design. Finally, these guidelines are used for design of the dual-mode antenna.
{"title":"Efficient design procedure of dual-mode antennas based on the characteristic modes theory","authors":"M. Bagheriasl, K. Mohammadpour‐Aghdam, R. Faraji-Dana","doi":"10.1109/MECAP.2016.7790113","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790113","url":null,"abstract":"This paper presents a systematic and efficient approach for design of a dual-mode antenna. In this approach, characteristic mode analysis is performed on the antenna structure to assess the suitability of the proposed structure for wideband dual-mode operation. After its suitability is assessed, a parametric study is performed on characteristic modes of the structure to extract some guidelines for the antenna design. Finally, these guidelines are used for design of the dual-mode antenna.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129250339","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 : 2016-09-01DOI: 10.1109/MECAP.2016.7790114
Eslam N. Mohamed, A. Sobih, A. El-Tager
This paper introduces a miniaturization technique of a microstrip Wilkinson power divider while enhancing harmonic suppression. This technique based on substituting the quarter wavelength microstrip lines employed in conventional Wilkinson power dividers with Inductive loaded microstrip line which consist of two inductors and a microstrip line. Through ABCD matrix the general design equations for this design are derived in closed form. A reduction in the size together with very good isolation, reflection, and coupling characteristics is achieved. In addition, Monte Carlo simulation verifies that the proposed design is insensitive to fabrication and component tolerances.
{"title":"Compact wilkinson power divider with Inductive loaded microstrip line for harmonics suppression","authors":"Eslam N. Mohamed, A. Sobih, A. El-Tager","doi":"10.1109/MECAP.2016.7790114","DOIUrl":"https://doi.org/10.1109/MECAP.2016.7790114","url":null,"abstract":"This paper introduces a miniaturization technique of a microstrip Wilkinson power divider while enhancing harmonic suppression. This technique based on substituting the quarter wavelength microstrip lines employed in conventional Wilkinson power dividers with Inductive loaded microstrip line which consist of two inductors and a microstrip line. Through ABCD matrix the general design equations for this design are derived in closed form. A reduction in the size together with very good isolation, reflection, and coupling characteristics is achieved. In addition, Monte Carlo simulation verifies that the proposed design is insensitive to fabrication and component tolerances.","PeriodicalId":366020,"journal":{"name":"2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129023155","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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