Pub Date : 2018-12-01DOI: 10.1109/ISAPE.2018.8634230
Zhenjia Song, Jun Li, Kouzhong Shi, San He, C. Yuan, Zhongxiang Zhou
M-type barium ferrite BaFe12O19 (BaM) is widely used in magnetic recording and microwave absorbing and doped BaM generally has a better performance on microwave absorbing property. The magnetic performance and microwave absorbing property for doped barium ferrite $mathbf{Ba}(mathbf{CoTi})_{boldsymbol{x}}mathbf{Fe}_{12-2boldsymbol{x}}mathbf{O}_{19} (boldsymbol{x}=0.2, 0.4, 0.6)$ synthesized by sol-gel method are investigated in this work. With the increase of doping amount, the $boldsymbol{M}_{mathbf{r}}$ and $boldsymbol{H}_{mathbf{c}}$ decrease rapidly which may be attributed to the doping of Co2+ and Ti4+ ions decreases the magnetic and the magnetic anisotropy constant quickly. The microwave absorbing results show that the property of reflection loss can be modulated by thickness. The maximum reflection loss of absorber Ba(CoTi)0.4Fe11.2O19-PVA can reach −36.37 dB at 15.44 GHz at 4.5 mm with a bandwidth over −-10 dB 2.08 GHz while Ba(CoTi)0.6Fe10.8O19-PVA can reach −29.51 dB at 17.92 GHz at 3.6 mm.
{"title":"The Microwave Absorbing Performance of Co2+ - Ti4+ Co-doped Barium Ferrite Ceramics","authors":"Zhenjia Song, Jun Li, Kouzhong Shi, San He, C. Yuan, Zhongxiang Zhou","doi":"10.1109/ISAPE.2018.8634230","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634230","url":null,"abstract":"M-type barium ferrite BaFe<inf>12</inf>O<inf>19</inf> (BaM) is widely used in magnetic recording and microwave absorbing and doped BaM generally has a better performance on microwave absorbing property. The magnetic performance and microwave absorbing property for doped barium ferrite <tex>$mathbf{Ba}(mathbf{CoTi})_{boldsymbol{x}}mathbf{Fe}_{12-2boldsymbol{x}}mathbf{O}_{19} (boldsymbol{x}=0.2, 0.4, 0.6)$</tex> synthesized by sol-gel method are investigated in this work. With the increase of doping amount, the <tex>$boldsymbol{M}_{mathbf{r}}$</tex> and <tex>$boldsymbol{H}_{mathbf{c}}$</tex> decrease rapidly which may be attributed to the doping of Co<sup>2+</sup> and Ti<sup>4+</sup> ions decreases the magnetic and the magnetic anisotropy constant quickly. The microwave absorbing results show that the property of reflection loss can be modulated by thickness. The maximum reflection loss of absorber Ba(CoTi)<inf>0.4</inf>Fe<inf>11.2</inf>O<inf>19</inf>-PVA can reach −36.37 dB at 15.44 GHz at 4.5 mm with a bandwidth over −-10 dB 2.08 GHz while Ba(CoTi)<inf>0.6</inf>Fe<inf>10.8</inf>O<inf>19</inf>-PVA can reach −29.51 dB at 17.92 GHz at 3.6 mm.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121568399","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634206
Yongsheng Liu, Xiangming Guo, Leke Lin
Spread spectrum sliding correlation method is used for wide channel measurement at non-line-of-sight over sea in this paper. Time domain channel measurement is a common method in remote measurement which can obtain channel impulse response(CIR) directly. Through this method we calculated delay spread of the multipath over-the-horizon at sea.
{"title":"Wideband Channel Measurement Over the Horizon","authors":"Yongsheng Liu, Xiangming Guo, Leke Lin","doi":"10.1109/ISAPE.2018.8634206","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634206","url":null,"abstract":"Spread spectrum sliding correlation method is used for wide channel measurement at non-line-of-sight over sea in this paper. Time domain channel measurement is a common method in remote measurement which can obtain channel impulse response(CIR) directly. Through this method we calculated delay spread of the multipath over-the-horizon at sea.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123099355","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 : 2018-12-01DOI: 10.1109/isape.2018.8634061
Qinglin Shi, Siqiao Dong, Lin Zhu, Guodong Lu
A broadcast and television signal power detection system based on space radiation is designed in this paper. It solves the problem that the in-use broadcast and television transmitting equipment cannot be detected due to the difficulty of coordination and the lack of coupling port during the traditional conduction detection. The system is mainly composed of an antenna, a test receiver, a computer and detection software. During the detection, the system is set up at a appropriate place, and the corresponding parameters are input in to the software. The system will complete the reception, storage and calculation of the broadcast and television signals at the corresponding frequency points, and then obtain the equivalent EIRP of the transmitting port. The actual detection shows that the system is stable and the deviation is less than ± 6dB. The research improves the management level of in-use broadcast and television station by rose to a overall performance of in-use station through space radiation instead of that of the independent parts such as transmitters, feeders, and transmitting antennas.
{"title":"Research on Broadcast and Television Signal Power Detection System Based on Space Radiation","authors":"Qinglin Shi, Siqiao Dong, Lin Zhu, Guodong Lu","doi":"10.1109/isape.2018.8634061","DOIUrl":"https://doi.org/10.1109/isape.2018.8634061","url":null,"abstract":"A broadcast and television signal power detection system based on space radiation is designed in this paper. It solves the problem that the in-use broadcast and television transmitting equipment cannot be detected due to the difficulty of coordination and the lack of coupling port during the traditional conduction detection. The system is mainly composed of an antenna, a test receiver, a computer and detection software. During the detection, the system is set up at a appropriate place, and the corresponding parameters are input in to the software. The system will complete the reception, storage and calculation of the broadcast and television signals at the corresponding frequency points, and then obtain the equivalent EIRP of the transmitting port. The actual detection shows that the system is stable and the deviation is less than ± 6dB. The research improves the management level of in-use broadcast and television station by rose to a overall performance of in-use station through space radiation instead of that of the independent parts such as transmitters, feeders, and transmitting antennas.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126465381","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634118
Xinhua Yu, Jun Wang, Xingqiang Huang, Guiyu Sun
A time-saving method to reshape the surface of reflector antenna fed by a quasi-actual feed(QAF) based on the Non-Uniform Rational B-Spline Surface (NURBS) technique, ray tracing technology (RT), physical optical method (PO), and Gauss-Legendre integral (GLI), is proposed. The optimized surface of the reflector can be smooth and time-saving by NURBS algorithm to support its better agreement with its future manufactured counterpart and by RT-PO-GLI method, where the antenna is fed by a QAF derived from the far-field data of an antenna model simulated from the commercial software MWS Studio CST, not a pure imaginary feed like in the available literature. An objective function is constructed with the weights of main-lobe level, side-lobe level, and beam width of the considered antenna to regulate the method to optimize electric far-field radiation patterns to specific purpose. The results show that the method has a faster calculating speed and can surely be expected to design a reshaped reflector antenna effectively and fast.
提出了一种基于非均匀有理b样条曲面(NURBS)技术、射线追踪技术(RT)、物理光学法(PO)和高斯-勒让德积分(GLI)的准实际馈入(QAF)反射面天线表面重塑的省时方法。通过NURBS算法和RT-PO-GLI方法，优化后的反射器表面可以平滑和节省时间，以支持其与未来制造的对应物更好地一致。RT-PO-GLI方法中，天线由由商业软件MWS Studio CST模拟的天线模型的远场数据导出的QAF馈电，而不是像现有文献中那样纯粹的想象馈电。通过考虑天线的主瓣电平、旁瓣电平和波束宽度的权重，构造目标函数来调节远场电辐射方向图的优化方法。结果表明，该方法具有较快的计算速度，可以有效、快速地设计出整形反射面天线。
{"title":"Fast-Shaping of Reflector Antenna Illuminated by Quasi-Actual Feed","authors":"Xinhua Yu, Jun Wang, Xingqiang Huang, Guiyu Sun","doi":"10.1109/ISAPE.2018.8634118","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634118","url":null,"abstract":"A time-saving method to reshape the surface of reflector antenna fed by a quasi-actual feed(QAF) based on the Non-Uniform Rational B-Spline Surface (NURBS) technique, ray tracing technology (RT), physical optical method (PO), and Gauss-Legendre integral (GLI), is proposed. The optimized surface of the reflector can be smooth and time-saving by NURBS algorithm to support its better agreement with its future manufactured counterpart and by RT-PO-GLI method, where the antenna is fed by a QAF derived from the far-field data of an antenna model simulated from the commercial software MWS Studio CST, not a pure imaginary feed like in the available literature. An objective function is constructed with the weights of main-lobe level, side-lobe level, and beam width of the considered antenna to regulate the method to optimize electric far-field radiation patterns to specific purpose. The results show that the method has a faster calculating speed and can surely be expected to design a reshaped reflector antenna effectively and fast.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"277 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121195270","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634338
Jiaxuan Xu, Haipeng Wang
Study on the jamming techniques against synthetic aperture radar is one of the important topics in the field of electronic warfare. This paper introduces the jamming principle of synthetic aperture radar imaging, including barrage jamming and deceptive jamming, and proposes an adjustable triangular wave pre-aggravate frequency modulation jamming method for barrage jamming. A basic deceptive algorithm which can generate false targets at specific locations is simulated. Simulation results show that this algorithm can effectively protect the region.
{"title":"Jamming Simulation of Synthetic Aperture Radar Imaging","authors":"Jiaxuan Xu, Haipeng Wang","doi":"10.1109/ISAPE.2018.8634338","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634338","url":null,"abstract":"Study on the jamming techniques against synthetic aperture radar is one of the important topics in the field of electronic warfare. This paper introduces the jamming principle of synthetic aperture radar imaging, including barrage jamming and deceptive jamming, and proposes an adjustable triangular wave pre-aggravate frequency modulation jamming method for barrage jamming. A basic deceptive algorithm which can generate false targets at specific locations is simulated. Simulation results show that this algorithm can effectively protect the region.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121841240","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634243
Bo Zhang, Xiaoqing Dai, Ziming Xiong, Wantai Liu, C. Qian
Sideflash is a kind of lightning striking on the side wall of tall buildings. This unexpected thunder stroke often leads to big property losses and endangers lives of people. However, the origin and development mechanism of this lightning stroke are still not clear. To simulate the sideflash, a 3-D numerical model of negative cloud-to-ground lightning is built which is composed of two parts: the thundercloud model and the stepped leader model. The thundercloud model is based on the 3-D dynamics and electrification coupled model. And the stepped leader model is based on the Dielectric Breakdown Model (DBM). The Poisson's Equation solved by the Successive Over-Relaxation method is employed to refresh the spatial electric potential field. Finally, some buildings with different heights are set on the ground. In the numerical simulation, some sideflashes are observed. Based on the comparison experiments, the origin of these phenomena is discussed.
{"title":"Numerical Simulation of Sideflash striking on the side wall of tall buildings","authors":"Bo Zhang, Xiaoqing Dai, Ziming Xiong, Wantai Liu, C. Qian","doi":"10.1109/ISAPE.2018.8634243","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634243","url":null,"abstract":"Sideflash is a kind of lightning striking on the side wall of tall buildings. This unexpected thunder stroke often leads to big property losses and endangers lives of people. However, the origin and development mechanism of this lightning stroke are still not clear. To simulate the sideflash, a 3-D numerical model of negative cloud-to-ground lightning is built which is composed of two parts: the thundercloud model and the stepped leader model. The thundercloud model is based on the 3-D dynamics and electrification coupled model. And the stepped leader model is based on the Dielectric Breakdown Model (DBM). The Poisson's Equation solved by the Successive Over-Relaxation method is employed to refresh the spatial electric potential field. Finally, some buildings with different heights are set on the ground. In the numerical simulation, some sideflashes are observed. Based on the comparison experiments, the origin of these phenomena is discussed.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121380247","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634408
Weilan Hai, Yonghui Zhang, Zhenjia Chen, Xia Guo, Chao He
Cognitive radio energy detection algorithm is widely used in practical engineering, but its main shortcoming is that the judgment threshold is difficult, and it is difficult to set the threshold while taking into account both false alarm probability and leakage alarm probability, thus increasing the difficulty of signal marking in the spectrum. Therefore, on the basis of the traditional double-threshold energy detection, a signal marking method is proposed for the characteristic of the fluctuation of the average power of noise. The maximum holding method is used to further process the spectrum and mark the central frequency point. Then, on the basis of the double-threshold energy detection, the frequency points between the double-threshold are sampled and modeled, and the end points of the frequency band are marked, so as to achieve the purpose of signal marking.
{"title":"A Signal Marker Method Based On Double Threshold Energy Detection","authors":"Weilan Hai, Yonghui Zhang, Zhenjia Chen, Xia Guo, Chao He","doi":"10.1109/ISAPE.2018.8634408","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634408","url":null,"abstract":"Cognitive radio energy detection algorithm is widely used in practical engineering, but its main shortcoming is that the judgment threshold is difficult, and it is difficult to set the threshold while taking into account both false alarm probability and leakage alarm probability, thus increasing the difficulty of signal marking in the spectrum. Therefore, on the basis of the traditional double-threshold energy detection, a signal marking method is proposed for the characteristic of the fluctuation of the average power of noise. The maximum holding method is used to further process the spectrum and mark the central frequency point. Then, on the basis of the double-threshold energy detection, the frequency points between the double-threshold are sampled and modeled, and the end points of the frequency band are marked, so as to achieve the purpose of signal marking.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116568023","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634385
Hongqiao Luo, Peng Wang
A ultra-wideband (UWB) and ultra compact bandpass filter constructed by connecting two short stubs on a stepped-impedance split ring resonator(SISRR) was developed. On the basis of the analysis of the feedback, the bandwidth of the lower and upper changes the short stub can be independently controlled, load, the design and optimization of the simplification of the procedures. The simulated and measured results are in good agreement in the full operating frequency band from 2.2 GHz to 10.8 GHz.
{"title":"A Miniature UWB Bandpass Filter Using Fractal Stepped Impedance Resonator","authors":"Hongqiao Luo, Peng Wang","doi":"10.1109/ISAPE.2018.8634385","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634385","url":null,"abstract":"A ultra-wideband (UWB) and ultra compact bandpass filter constructed by connecting two short stubs on a stepped-impedance split ring resonator(SISRR) was developed. On the basis of the analysis of the feedback, the bandwidth of the lower and upper changes the short stub can be independently controlled, load, the design and optimization of the simplification of the procedures. The simulated and measured results are in good agreement in the full operating frequency band from 2.2 GHz to 10.8 GHz.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125193051","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634099
Kangbing Liu, Mohaira Ahmad, Lijuan Shi, Lixia Yang
The convolutional perfectly matched layer is implemented for the face-centered cubic grid which can substitute the standard Cartesian (Yee) grid. The face-centered cubic grid proves to have better grid isotropy and relaxed stability criterion. Here, we implemented the convolutional perfectly matched layer as an absorbing boundary for the face-centered cubic computational domain. The efficiency of the convolutional perfectly matched layer is demonstrated by comparing the reflection error obtained in face centered cubic grid with the reflection error in the Yee's grid.
{"title":"CPML Implementation for FCC-FDTD Method","authors":"Kangbing Liu, Mohaira Ahmad, Lijuan Shi, Lixia Yang","doi":"10.1109/ISAPE.2018.8634099","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634099","url":null,"abstract":"The convolutional perfectly matched layer is implemented for the face-centered cubic grid which can substitute the standard Cartesian (Yee) grid. The face-centered cubic grid proves to have better grid isotropy and relaxed stability criterion. Here, we implemented the convolutional perfectly matched layer as an absorbing boundary for the face-centered cubic computational domain. The efficiency of the convolutional perfectly matched layer is demonstrated by comparing the reflection error obtained in face centered cubic grid with the reflection error in the Yee's grid.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122525376","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 : 2018-12-01DOI: 10.1109/ISAPE.2018.8634145
Xiangyu Dong, Yu Xiao, Houjun Sun
A 3-bit dual linearly polarized transmit-array antenna at W-band is designed in this paper. The unit cells are designed based on bandpass characteristics. By using such unit cells for an array of 241 unit cells, a high gain array of 27.4dBi is realized. The 3dB beamwidth of the antenna is 6.9 degree. The gain width of the antenna is more than 20GHz. The unit cells are fully symmetric, which assure good characteristics on polarization independence.
{"title":"Design of a W-band 3-bit Dual Linearly Polarized Transmit-array Antenna","authors":"Xiangyu Dong, Yu Xiao, Houjun Sun","doi":"10.1109/ISAPE.2018.8634145","DOIUrl":"https://doi.org/10.1109/ISAPE.2018.8634145","url":null,"abstract":"A 3-bit dual linearly polarized transmit-array antenna at W-band is designed in this paper. The unit cells are designed based on bandpass characteristics. By using such unit cells for an array of 241 unit cells, a high gain array of 27.4dBi is realized. The 3dB beamwidth of the antenna is 6.9 degree. The gain width of the antenna is more than 20GHz. The unit cells are fully symmetric, which assure good characteristics on polarization independence.","PeriodicalId":297368,"journal":{"name":"2018 12th International Symposium on Antennas, Propagation and EM Theory (ISAPE)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122673556","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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