Pub Date : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021472
Yu Zuo, Haijun Wan, Jianxuan Li, Jialin Shi, Zusheng Jin
A novel three-dimensional (3-D) frequency selective surface (FSS) exhibiting wide- band and highly selective bandpass response is presented. The proposed FSS consists of a two- dimensional periodic array of vertical, shielded, and suspended striplines. By combining the high- pass property of the periodic array of waveguides with bandstop resonances from the inserted U-shaped striplines, a quasi-elliptic bandpass frequency response over a wide-band from 8.4 GHz to 16.2 GHz is achieved with a 3 dB frequency bandwidth of 63% and a sharp rejection skirt.
{"title":"Three-dimensional Frequency Selective Surface with Quasi-elliptic Bandpass Response","authors":"Yu Zuo, Haijun Wan, Jianxuan Li, Jialin Shi, Zusheng Jin","doi":"10.1109/PIERS-Fall48861.2019.9021472","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021472","url":null,"abstract":"A novel three-dimensional (3-D) frequency selective surface (FSS) exhibiting wide- band and highly selective bandpass response is presented. The proposed FSS consists of a two- dimensional periodic array of vertical, shielded, and suspended striplines. By combining the high- pass property of the periodic array of waveguides with bandstop resonances from the inserted U-shaped striplines, a quasi-elliptic bandpass frequency response over a wide-band from 8.4 GHz to 16.2 GHz is achieved with a 3 dB frequency bandwidth of 63% and a sharp rejection skirt.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129889074","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021604
Siming Su, Jinjun Feng
In this paper, the beam-wave interaction system of a continuous wave clinotron oscillator is designed which aims to meet the system application needs of high power source at 400 GHz frequency band. The double corrugated waveguide slow wave structure (SWS) and sheet beam are presented by simulation. The SWS parameters, the parallel electron beam current and inclination angle, and the permanent guiding magnetic field are chosen in the system through optimization using electromagnetic codes and PIC codes. Because of the inclination of the electron beam, the electrons are closer to the SWS and can have stronger interaction with the electric field in order to obtain higher output power. Besides, thicker electron beam can be used when the electron beam is inclined, which also leads to a higher output power. Moreover, there are no absorbers at the SWS ends so that strong reflections will exist at beam inlet and outlet. The simulation results show that the maximum output power is 229.8 mW at frequency of 397 GHz is achieved with beam voltage 10 kV, beam current 120 mA and guiding magnetic field of 1.0 T.
{"title":"Design and Simulation of the Beam-wave Interaction System of 400 GHz Clinotron","authors":"Siming Su, Jinjun Feng","doi":"10.1109/PIERS-Fall48861.2019.9021604","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021604","url":null,"abstract":"In this paper, the beam-wave interaction system of a continuous wave clinotron oscillator is designed which aims to meet the system application needs of high power source at 400 GHz frequency band. The double corrugated waveguide slow wave structure (SWS) and sheet beam are presented by simulation. The SWS parameters, the parallel electron beam current and inclination angle, and the permanent guiding magnetic field are chosen in the system through optimization using electromagnetic codes and PIC codes. Because of the inclination of the electron beam, the electrons are closer to the SWS and can have stronger interaction with the electric field in order to obtain higher output power. Besides, thicker electron beam can be used when the electron beam is inclined, which also leads to a higher output power. Moreover, there are no absorbers at the SWS ends so that strong reflections will exist at beam inlet and outlet. The simulation results show that the maximum output power is 229.8 mW at frequency of 397 GHz is achieved with beam voltage 10 kV, beam current 120 mA and guiding magnetic field of 1.0 T.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128320766","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021435
H. Zheng, Qing Xu, M. Tong
With the rapid development of electronic and communication technology, electromagnetic wave absorption and interference shielding has been becoming more and more important in electromagnetic (EM) applications. Today, radar absorber has been an one of the most efficient ways to address problems resulting from electromagnetic pollution and interference. What’s more, in order to cover a wider frequency range, we design a two-layer absorber rather than a single-layer absorber. In this work, we propose a novel two-layer thin wideband radar absorber with two types of materials, Ni0.8Co0.2Fe2O4 nanofibers (NCFO NFs) and Ni-C hybrid nanofibers (Ni-C NFs). And we use NCFO NFs as the matching layer and Ni-C NFs as the matching layer to achieve the better microwave absorption. It has better performance at the radar working frequency, 2.0–18.0 GHz. In addition, it can achieve a wide bandwidth, covering the 82.5% of X-band and the 100% of Ku-band, with a total thickness of 3.0 mm.
{"title":"A New Design for Two-layer Thin Wideband Radar Absorber","authors":"H. Zheng, Qing Xu, M. Tong","doi":"10.1109/PIERS-Fall48861.2019.9021435","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021435","url":null,"abstract":"With the rapid development of electronic and communication technology, electromagnetic wave absorption and interference shielding has been becoming more and more important in electromagnetic (EM) applications. Today, radar absorber has been an one of the most efficient ways to address problems resulting from electromagnetic pollution and interference. What’s more, in order to cover a wider frequency range, we design a two-layer absorber rather than a single-layer absorber. In this work, we propose a novel two-layer thin wideband radar absorber with two types of materials, Ni0.8Co0.2Fe2O4 nanofibers (NCFO NFs) and Ni-C hybrid nanofibers (Ni-C NFs). And we use NCFO NFs as the matching layer and Ni-C NFs as the matching layer to achieve the better microwave absorption. It has better performance at the radar working frequency, 2.0–18.0 GHz. In addition, it can achieve a wide bandwidth, covering the 82.5% of X-band and the 100% of Ku-band, with a total thickness of 3.0 mm.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128545868","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021594
Yupeng Sun, Panhe Hu, Jiameng Pan, Qinglong Bao
We propose a new method to estimate the directions-of-arrival (DOA) of target for passive bistatic radar (PBR) system in coherent environment. Since the illuminators of PBR is non-cooperative, the performance of the DOA estimation suffers from limited snapshots and low signal-to-noise ratio (SNR) In addition, the interferences of strong direct wave and multipath signals are also intractable to deal with. In this method a sparse representation of the signals is firstly established, and the iterative adaptive approach (IAA) is applied to spatial spectrum estimation. Then we can eliminate the direct wave in the airspace and obtain the DOA estimation of the scattered signal of target by searching for peaks. Compared with the previous works, the proposed method achieves improved DOA estimation accuracy. Simulation results validate the better performance of the proposed method.
{"title":"An IAA-based DOA Estimation Method for PBR in Coherent Environment","authors":"Yupeng Sun, Panhe Hu, Jiameng Pan, Qinglong Bao","doi":"10.1109/PIERS-Fall48861.2019.9021594","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021594","url":null,"abstract":"We propose a new method to estimate the directions-of-arrival (DOA) of target for passive bistatic radar (PBR) system in coherent environment. Since the illuminators of PBR is non-cooperative, the performance of the DOA estimation suffers from limited snapshots and low signal-to-noise ratio (SNR) In addition, the interferences of strong direct wave and multipath signals are also intractable to deal with. In this method a sparse representation of the signals is firstly established, and the iterative adaptive approach (IAA) is applied to spatial spectrum estimation. Then we can eliminate the direct wave in the airspace and obtain the DOA estimation of the scattered signal of target by searching for peaks. Compared with the previous works, the proposed method achieves improved DOA estimation accuracy. Simulation results validate the better performance of the proposed method.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128174595","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021298
Hamed Mosallam, A. M. Musa, M. K. Ali, H. H. Abdullah
Recently, the implementation of a complete RF transceiver system at the mm-wave band is of main interest as the recent technological trend is to build a complete system on chip (SOC). One of the main keys of the transceiver systems is the voltage-controlled oscillator (VCO) which is considered the main building block of the phase locked loop (PLL) frequency synthesizer. Realizing VCO with wider tuning range (TR) and low phase noise at the mm-wave frequency range is considered a challenging task. In this work, a cross coupled differential pair Class-C voltage controlled oscillator is employed to improve the phase noise across wider tuning range. The proposed design is based on the 0.13 µm SiGe BiCMOS process technology. A new varactor circuit is proposed to extend the tuning range. In order to extend the tuning range of the VCO more and more, a bank of fixed capacitors is added to the LC tank with a controlled MOS switches. Multiple tuning ranges are achieved using the proposed LC tank. The EM effects of the paths and interconnections through the layout are taken into considerations before fabrication. The proposed LC VCO achieved maximum post-layout phase noise of −97 (dBc/Hz) at 1 MHz offset from the carries. In addition, it achieves a wide tuning range between 18.2 GHz to 26 GHz. Moreover, the proposed VCO consumes only 12 mW from 1.2 voltage supply.
最近，在毫米波波段实现一个完整的射频收发系统是主要的兴趣，因为最近的技术趋势是建立一个完整的片上系统(SOC)。压控振荡器(VCO)是收发器系统的关键之一，它被认为是锁相环频率合成器的主要组成部分。在毫米波频率范围内实现更宽调谐范围和低相位噪声的压控振荡器被认为是一项具有挑战性的任务。在这项工作中，采用交叉耦合差分对c类压控振荡器来改善更宽调谐范围内的相位噪声。该设计基于0.13 μ m SiGe BiCMOS工艺技术。提出了一种新的变容电路，以扩大调谐范围。为了进一步扩大压控振荡器的调谐范围，在控制MOS开关的LC槽中增加了一组固定电容器。使用所提出的LC罐可以实现多个调谐范围。在制作之前，考虑了通过布局的路径和互连的电磁效应。所提出的LC压控振荡器在距载波1mhz偏移处实现了最大布局后相位噪声- 97 (dBc/Hz)。此外，它还实现了18.2 GHz到26 GHz之间的宽调谐范围。此外，所提出的VCO从1.2电压电源中仅消耗12兆瓦。
{"title":"Design of Low Power Class-C Voltage Controlled Oscillator Using 0.13 µm SiGe BiCMOS for K-band Applications","authors":"Hamed Mosallam, A. M. Musa, M. K. Ali, H. H. Abdullah","doi":"10.1109/PIERS-Fall48861.2019.9021298","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021298","url":null,"abstract":"Recently, the implementation of a complete RF transceiver system at the mm-wave band is of main interest as the recent technological trend is to build a complete system on chip (SOC). One of the main keys of the transceiver systems is the voltage-controlled oscillator (VCO) which is considered the main building block of the phase locked loop (PLL) frequency synthesizer. Realizing VCO with wider tuning range (TR) and low phase noise at the mm-wave frequency range is considered a challenging task. In this work, a cross coupled differential pair Class-C voltage controlled oscillator is employed to improve the phase noise across wider tuning range. The proposed design is based on the 0.13 µm SiGe BiCMOS process technology. A new varactor circuit is proposed to extend the tuning range. In order to extend the tuning range of the VCO more and more, a bank of fixed capacitors is added to the LC tank with a controlled MOS switches. Multiple tuning ranges are achieved using the proposed LC tank. The EM effects of the paths and interconnections through the layout are taken into considerations before fabrication. The proposed LC VCO achieved maximum post-layout phase noise of −97 (dBc/Hz) at 1 MHz offset from the carries. In addition, it achieves a wide tuning range between 18.2 GHz to 26 GHz. Moreover, the proposed VCO consumes only 12 mW from 1.2 voltage supply.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127262141","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}
In this paper, an ultra-thin UWB absorber is designed by using Non-Foster circuit and Frequency Selective Surface. The absorbing structure consists of Non-Foster matching layer, magnetic material layer with FSS and ground layer. To broaden the absorbing bandwidth, two layers of magnetic materials are shaped by holes. It is verified by simulation that the absorptivity is higher than 80% in 0.15GHz–18GHz when the TM polarized wave is incident. And the thickness of the absorber is about 8mm, which is 1/250 of the operating wavelength. The ultra-thin UWB absorber can be widely used in wireless communication and radar applications.
{"title":"Ultra-wideband Active Absorber Based on Multiple Frequency Selective Surface and Magnetic Layers","authors":"Weiwei Gu, Jian Li, Yongjun Huang, G. Wen, Haobin Zhang, Wenxian Zheng, Yongjun Yang, Wei Hu, D. Inserra, Zhengwu Xu, Gui Li, Dongliang Zhang","doi":"10.1109/PIERS-Fall48861.2019.9021719","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021719","url":null,"abstract":"In this paper, an ultra-thin UWB absorber is designed by using Non-Foster circuit and Frequency Selective Surface. The absorbing structure consists of Non-Foster matching layer, magnetic material layer with FSS and ground layer. To broaden the absorbing bandwidth, two layers of magnetic materials are shaped by holes. It is verified by simulation that the absorptivity is higher than 80% in 0.15GHz–18GHz when the TM polarized wave is incident. And the thickness of the absorber is about 8mm, which is 1/250 of the operating wavelength. The ultra-thin UWB absorber can be widely used in wireless communication and radar applications.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127026581","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021411
Bilawal Ali, Zhanliang Wang, M. Nadeem, Asif Mehmood Khan, Zhigang Lu, H. Gong, Z. Duan, Y. Gong
The Magnetic Insulated Line Oscillator (MILO) has gained popularity in recent decades as a useful high-power microwave device, due to its inherent property of self-insulating magnetic field. The self-generated magnetic field acts as an internal insulation barrier within the device and prevents electrical breakdown, which is important for gigawatt range operation. S-band MILO design, analysis, simulation and parameter optimization has been studied and presented in this paper. The presented MILO design consists of a three-stage choke cavity, three- cavity extraction region, and a slow wave structure. An attempt is made to increase the efficiency by using the concept of a tapered extraction region which improves wave extraction at the output a beam dump disk which acts as a tool to properly utilize the load current for self-insulating magnetic field generation. The disk is supported by four appropriately sized and positioned stubs for impedance matching, and hence improve output power. A parametric optimization run on both the structural and beam parameters provides the best values for operation. The results presented are obtained using the commercial software CST Studio, using its 3D Particle-In-Cell (PIC) simulation method. Eigenmode analysis is also performed on the slow wave structure to get dispersion curves for resonant frequency of MILO and verify its operation in n-mode. Simulation results reveal that the S-band MILO generates dominant TM01 mode at the desired frequency of 3.4 GHz. The results show a stable frequency response throughout the time of operation, as well as a high dominant mode efficiency of 98%. The generated wave has a peak power of 6.8 GW and a peak efficiency of 22.5% with the application of an input pulse voltage of 530kV and 57kA current.
{"title":"Design Analysis and Simulation Investigation of S-band MILO","authors":"Bilawal Ali, Zhanliang Wang, M. Nadeem, Asif Mehmood Khan, Zhigang Lu, H. Gong, Z. Duan, Y. Gong","doi":"10.1109/PIERS-Fall48861.2019.9021411","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021411","url":null,"abstract":"The Magnetic Insulated Line Oscillator (MILO) has gained popularity in recent decades as a useful high-power microwave device, due to its inherent property of self-insulating magnetic field. The self-generated magnetic field acts as an internal insulation barrier within the device and prevents electrical breakdown, which is important for gigawatt range operation. S-band MILO design, analysis, simulation and parameter optimization has been studied and presented in this paper. The presented MILO design consists of a three-stage choke cavity, three- cavity extraction region, and a slow wave structure. An attempt is made to increase the efficiency by using the concept of a tapered extraction region which improves wave extraction at the output a beam dump disk which acts as a tool to properly utilize the load current for self-insulating magnetic field generation. The disk is supported by four appropriately sized and positioned stubs for impedance matching, and hence improve output power. A parametric optimization run on both the structural and beam parameters provides the best values for operation. The results presented are obtained using the commercial software CST Studio, using its 3D Particle-In-Cell (PIC) simulation method. Eigenmode analysis is also performed on the slow wave structure to get dispersion curves for resonant frequency of MILO and verify its operation in n-mode. Simulation results reveal that the S-band MILO generates dominant TM01 mode at the desired frequency of 3.4 GHz. The results show a stable frequency response throughout the time of operation, as well as a high dominant mode efficiency of 98%. The generated wave has a peak power of 6.8 GW and a peak efficiency of 22.5% with the application of an input pulse voltage of 530kV and 57kA current.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127329664","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021834
Chunli Lu, Shasha Shan, Hong Xiao, Liming Jiang, Xueqing Ma
Studying the logging response of micro-resistivity scanning imaging tools under different geological features is a prerequisite for the in-depth application of wellbore electrical imaging logging data for geological feature interpretation. Many scholars are conducting related numerical simulations. Based on the electromagnetic field theory, this paper uses the finite element method to numerically simulate the response characteristics of the MCI6505 electric imaging tool developed by China National Petroleum Corporation Logging Co., Ltd. Using the developed 3D numerical simulation program simulation to determine the effective measurement range of the instrument, depth of investigation, K-factor and other key parameters. A conversion diagram between the instrument’s conductivity measurement signal and the true resistivity of the formation is established, and influences of the relative position of buttons on one pad, the standoff between the plate and the well wall, the diameter of the well or the pusher, and the mud resistivity are established. The influence rated on the above conversion relationship provides a reference for the quantitative calibration of the instrument.
{"title":"Response Simulation of MCI6505 Microresistivity Imaging Tool","authors":"Chunli Lu, Shasha Shan, Hong Xiao, Liming Jiang, Xueqing Ma","doi":"10.1109/PIERS-Fall48861.2019.9021834","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021834","url":null,"abstract":"Studying the logging response of micro-resistivity scanning imaging tools under different geological features is a prerequisite for the in-depth application of wellbore electrical imaging logging data for geological feature interpretation. Many scholars are conducting related numerical simulations. Based on the electromagnetic field theory, this paper uses the finite element method to numerically simulate the response characteristics of the MCI6505 electric imaging tool developed by China National Petroleum Corporation Logging Co., Ltd. Using the developed 3D numerical simulation program simulation to determine the effective measurement range of the instrument, depth of investigation, K-factor and other key parameters. A conversion diagram between the instrument’s conductivity measurement signal and the true resistivity of the formation is established, and influences of the relative position of buttons on one pad, the standoff between the plate and the well wall, the diameter of the well or the pusher, and the mud resistivity are established. The influence rated on the above conversion relationship provides a reference for the quantitative calibration of the instrument.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130066519","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021623
Ping Xu, Shiping Tang, Jiaxin Yao, Dawei Zhang, T. Jiang
Conformal arrays have far-reaching effects on phased arrays, mobile communication base stations, satellite communications, etc. Due to the complexity of the conformal array space structure, traditional array analysis and synthesis techniques are generally not suitable for conformal arrays. Therefore it is necessary to conduct more in-depth conformal array analysis and research. In this paper, the Euler rotation matrix method is used to convert a local pattern array unit into a global coordinate pattern to solve the problem of different beam pointing of each array element in the conformal array. At the same time, rectangular patch antenna is used as the basic array element of the conformal array. The classical cylindrical conformal antenna is selected as the research object. The conformal antenna is designed and simulated to obtain the specified beam pointing beam pattern of the cylindrical conformal antenna to verify the effectiveness of the proposed analytical method.
{"title":"An Analytical Method for Calculating the Pattern of Surface Conformal Array","authors":"Ping Xu, Shiping Tang, Jiaxin Yao, Dawei Zhang, T. Jiang","doi":"10.1109/PIERS-Fall48861.2019.9021623","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021623","url":null,"abstract":"Conformal arrays have far-reaching effects on phased arrays, mobile communication base stations, satellite communications, etc. Due to the complexity of the conformal array space structure, traditional array analysis and synthesis techniques are generally not suitable for conformal arrays. Therefore it is necessary to conduct more in-depth conformal array analysis and research. In this paper, the Euler rotation matrix method is used to convert a local pattern array unit into a global coordinate pattern to solve the problem of different beam pointing of each array element in the conformal array. At the same time, rectangular patch antenna is used as the basic array element of the conformal array. The classical cylindrical conformal antenna is selected as the research object. The conformal antenna is designed and simulated to obtain the specified beam pointing beam pattern of the cylindrical conformal antenna to verify the effectiveness of the proposed analytical method.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130134523","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 : 2019-12-01DOI: 10.1109/PIERS-Fall48861.2019.9021647
D. Madhavi, SUDHAKAR ALAPATI
A rectangular patch antenna with multiple slots is proposed in this paper to improve the bandwidth characteristics. The rectangular patch antenna consists of C-shaped patch lying along the feed line on both sides of it and the inner inverted U-slot along with the primary U-slot. Proposed antenna exhibits multi-resonant characteristics with the inclusion of several structures which are termed as multi-resonant structures. The notch band of 5.2-6 GHz (impedance bandwidth of 0.8 GHz) is observed by introducing U-slot and the corresponding gain is 4.587 dB at 7 GHz. The notch band antenna eliminates the interference caused by WLAN systems. The U-slot design is further extended by introducing inverted U-slot and C-slots. Hence, the segmented triple operating band has a -10 dB impedance bandwidth of 1 GHz (4-5 GHz), 10MHz (5.725-5.825 GHz) and 1.7GHz (7.8-9.5GHz). The maximum gain for the tri-band antenna is 6.024 dB at 8.5 GHz. The tri-band antenna gets return loss above -10 dB for WLAN and WiMAX frequency bands so as to avoid interference.
{"title":"Bandwidth Improvement of Rectangular Patch Antenna Using Multiple Slots","authors":"D. Madhavi, SUDHAKAR ALAPATI","doi":"10.1109/PIERS-Fall48861.2019.9021647","DOIUrl":"https://doi.org/10.1109/PIERS-Fall48861.2019.9021647","url":null,"abstract":"A rectangular patch antenna with multiple slots is proposed in this paper to improve the bandwidth characteristics. The rectangular patch antenna consists of C-shaped patch lying along the feed line on both sides of it and the inner inverted U-slot along with the primary U-slot. Proposed antenna exhibits multi-resonant characteristics with the inclusion of several structures which are termed as multi-resonant structures. The notch band of 5.2-6 GHz (impedance bandwidth of 0.8 GHz) is observed by introducing U-slot and the corresponding gain is 4.587 dB at 7 GHz. The notch band antenna eliminates the interference caused by WLAN systems. The U-slot design is further extended by introducing inverted U-slot and C-slots. Hence, the segmented triple operating band has a -10 dB impedance bandwidth of 1 GHz (4-5 GHz), 10MHz (5.725-5.825 GHz) and 1.7GHz (7.8-9.5GHz). The maximum gain for the tri-band antenna is 6.024 dB at 8.5 GHz. The tri-band antenna gets return loss above -10 dB for WLAN and WiMAX frequency bands so as to avoid interference.","PeriodicalId":197451,"journal":{"name":"2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130183187","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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