Pub Date : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657421
Li Kai, Wei Guang-hui, Pan Xiao-dong, Zhang Long, Li Xin-feng
To analysis field strength and protect sensitive circuits in shielding cavity, Field enhancement effect has been researched in frequency domain with shielding effectiveness by using electromagnetic simulation software CST. Experimental system has built with a vector network analyzer, power amplifier, GTEM cell and pulsed electromagnetic field measuring probe to verify the simulation results. Theoretical analysis about the formation mechanism of the field enhancement effect is studied, influence of shape of aperture, electromagnetic wave polarization direction, absorbing material loaded on field enhancement effect are also researched.
{"title":"Study of field enhancement effect of a metallic shielding cavity with an aperture","authors":"Li Kai, Wei Guang-hui, Pan Xiao-dong, Zhang Long, Li Xin-feng","doi":"10.1109/CSQRWC.2013.6657421","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657421","url":null,"abstract":"To analysis field strength and protect sensitive circuits in shielding cavity, Field enhancement effect has been researched in frequency domain with shielding effectiveness by using electromagnetic simulation software CST. Experimental system has built with a vector network analyzer, power amplifier, GTEM cell and pulsed electromagnetic field measuring probe to verify the simulation results. Theoretical analysis about the formation mechanism of the field enhancement effect is studied, influence of shape of aperture, electromagnetic wave polarization direction, absorbing material loaded on field enhancement effect are also researched.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121931820","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657422
Xiaotian Qiu, Yongxiang Liu, Xiang Li
Discrimination of the decoys and warhead is one of the key problems in the ballistic missile defense system. As the ground-based radars hardly observe the decoy release, it is of profound significance to investigate the ballistic trajectory inverse technology of space target. In this paper, a method of inverse technology based on two-object movement theory of midcourse ballistic trajectory is presented firstly. An Extended Kalman filter algorithm is then proposed to preprocess the data of the ballistic trajectory. The new algorithm shows a better performance comparing to the traditional least squares filter algorithm. Finally, some simulations are carried out to analyze the estimation error, considering some factors such as radar measurement error and radar parameters.
{"title":"A method of trajectory inverse estimation for space targets and performance analysis","authors":"Xiaotian Qiu, Yongxiang Liu, Xiang Li","doi":"10.1109/CSQRWC.2013.6657422","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657422","url":null,"abstract":"Discrimination of the decoys and warhead is one of the key problems in the ballistic missile defense system. As the ground-based radars hardly observe the decoy release, it is of profound significance to investigate the ballistic trajectory inverse technology of space target. In this paper, a method of inverse technology based on two-object movement theory of midcourse ballistic trajectory is presented firstly. An Extended Kalman filter algorithm is then proposed to preprocess the data of the ballistic trajectory. The new algorithm shows a better performance comparing to the traditional least squares filter algorithm. Finally, some simulations are carried out to analyze the estimation error, considering some factors such as radar measurement error and radar parameters.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115355757","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657365
R. Zhang, X. Q. Lin, C. Li, F. Cheng, Y. Fan
In this paper, a high-efficiency wireless power transmission (WPT) circuit for 15.22 MHz based on strongly coupled magnetic resonances is proposed using a new structure of coaxial resonators. The coaxial resonators are manufactured on a substrate. It has the advantages of compactness, ease of fabrication, high efficiency and low cost. The detail structure of the resonators and experimental results are presented. When it is a short-distance application, the efficiency of the circuit can be very high (91.62%) and when the distance increases to 1.5 times of the diameter (18 cm), still there is an efficiency of 52.48%.
{"title":"A high-efficiency wireless power transmission circuit using coaxial resonators welded on a substrate","authors":"R. Zhang, X. Q. Lin, C. Li, F. Cheng, Y. Fan","doi":"10.1109/CSQRWC.2013.6657365","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657365","url":null,"abstract":"In this paper, a high-efficiency wireless power transmission (WPT) circuit for 15.22 MHz based on strongly coupled magnetic resonances is proposed using a new structure of coaxial resonators. The coaxial resonators are manufactured on a substrate. It has the advantages of compactness, ease of fabrication, high efficiency and low cost. The detail structure of the resonators and experimental results are presented. When it is a short-distance application, the efficiency of the circuit can be very high (91.62%) and when the distance increases to 1.5 times of the diameter (18 cm), still there is an efficiency of 52.48%.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116490216","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657440
Xue-feng Wang, Jianguo Wang, Guang-qiang Wang, Wang Wei, Zhu Xiangqin, Shuang Li
Based on a three-dimensional finite-difference time-domain (FDTD) method, interactions between a high power terahertz pulse and an n-type silicon block fixed in a piece of rectangular waveguide has been researched for 0.3-0.4 THz band. The distribution of electric field in y-direction, voltage standing wave ratio (VSWR), and average electric field within the silicon block are calculated and analyzed. By adjusting several factors, such as the length, width, height and specific resistance of the silicon block, a more optimal resistive sensor that can be used as a device for high-power terahertz pulse measurement is proposed. The conclusion is that the sensor owns rather a flat relative sensitivity of about 1.048 kW-1 and the peak value of VSWR is no more than 1.34 at frequencies from 0.3 THz to 0.4 THz.
{"title":"A resistive sensor for 0.3–0.4 THz band","authors":"Xue-feng Wang, Jianguo Wang, Guang-qiang Wang, Wang Wei, Zhu Xiangqin, Shuang Li","doi":"10.1109/CSQRWC.2013.6657440","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657440","url":null,"abstract":"Based on a three-dimensional finite-difference time-domain (FDTD) method, interactions between a high power terahertz pulse and an n-type silicon block fixed in a piece of rectangular waveguide has been researched for 0.3-0.4 THz band. The distribution of electric field in y-direction, voltage standing wave ratio (VSWR), and average electric field within the silicon block are calculated and analyzed. By adjusting several factors, such as the length, width, height and specific resistance of the silicon block, a more optimal resistive sensor that can be used as a device for high-power terahertz pulse measurement is proposed. The conclusion is that the sensor owns rather a flat relative sensitivity of about 1.048 kW-1 and the peak value of VSWR is no more than 1.34 at frequencies from 0.3 THz to 0.4 THz.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114925406","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657404
Yu Lang, S. Qu
In this paper, a dielectric-loaded H-plane horn antenna implemented by a substrate integrated waveguide (SIW) was designed. The SIW horn antenna was fabricated in a single low-temperature co-fired ceramic (LTCC) substrate for easy fabrication and low cost, and a CPW to SIW transition was used to feed the horn. The dielectric slab loaded at the aperture of the horn have been utilized to optimize the bandwidth, narrow the beamwidth of radiation patterns in the H-plane and E-plane, and enhance the gain of the horn antenna. The simulation results show that over the operating bandwidth of 50GHz-57GHz, reflection coefficients of the antenna is less than -10dB and the gain is from 7.4dBi to 11.6dBi.
{"title":"A dielectric loaded H-plane horn for millimeter waves based on LTCC technology","authors":"Yu Lang, S. Qu","doi":"10.1109/CSQRWC.2013.6657404","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657404","url":null,"abstract":"In this paper, a dielectric-loaded H-plane horn antenna implemented by a substrate integrated waveguide (SIW) was designed. The SIW horn antenna was fabricated in a single low-temperature co-fired ceramic (LTCC) substrate for easy fabrication and low cost, and a CPW to SIW transition was used to feed the horn. The dielectric slab loaded at the aperture of the horn have been utilized to optimize the bandwidth, narrow the beamwidth of radiation patterns in the H-plane and E-plane, and enhance the gain of the horn antenna. The simulation results show that over the operating bandwidth of 50GHz-57GHz, reflection coefficients of the antenna is less than -10dB and the gain is from 7.4dBi to 11.6dBi.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"27 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129483888","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657419
Zhang Tao, Chen Yazhou, Cheng Erwei
In order to study the safety and reliability of Unmanned Aerial Vehicle in the battlefield electromagnetic environment, a continuous-wave electromagnetic radiating system is built in the laboratory. Using this system, experiments on irradiation effect for U AV data link system are implemented. Experimental results show that: the UAV data link system is susceptible to electromagnetic interference and can't work well in some frequencies. The UAV data link system would fall in state of losing lock, which means the data transmission between UAV and the ground control equipment would not be carried on effectively. What is more, different polarization direction of radiated electromagnetic field leads to different values of the electric field threshold for the communication link system losing lock. Analysis on results shows that the energy coupling channel between UAV data link systems and continuous-wave electromagnetic radiating system is the way of “back door” coupling.
{"title":"Continuous wave radiation effects on UAV data link system","authors":"Zhang Tao, Chen Yazhou, Cheng Erwei","doi":"10.1109/CSQRWC.2013.6657419","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657419","url":null,"abstract":"In order to study the safety and reliability of Unmanned Aerial Vehicle in the battlefield electromagnetic environment, a continuous-wave electromagnetic radiating system is built in the laboratory. Using this system, experiments on irradiation effect for U AV data link system are implemented. Experimental results show that: the UAV data link system is susceptible to electromagnetic interference and can't work well in some frequencies. The UAV data link system would fall in state of losing lock, which means the data transmission between UAV and the ground control equipment would not be carried on effectively. What is more, different polarization direction of radiated electromagnetic field leads to different values of the electric field threshold for the communication link system losing lock. Analysis on results shows that the energy coupling channel between UAV data link systems and continuous-wave electromagnetic radiating system is the way of “back door” coupling.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130074835","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657367
Hung-Wen Chang, Chang-Chien Chin-Min
The method of connected local fields, CLF [1,2] is becoming a viable numerical technique for obtaining solutions of the Helmholtz equation in complex media. In CLF the EM fields are expressed as collection of overlapping local fields called patches. In a 2D homogeneous medium we show that the local field in a given FD cell can be approximated by truncated Fourier-Bessel series (FBS) and the FBS coefficients are related to the control points on the surface of the given patch. As part of the effort for extending CLF capability to modeling EM waves in inhomogeneous media, we report in this paper, two numerical techniques for obtaining 2D CLF-based compact frequency-domain stencils for EM fields and waves near a dielectric interface.
{"title":"2D compact frequency-domain stencils for dielectric media with an interface","authors":"Hung-Wen Chang, Chang-Chien Chin-Min","doi":"10.1109/CSQRWC.2013.6657367","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657367","url":null,"abstract":"The method of connected local fields, CLF [1,2] is becoming a viable numerical technique for obtaining solutions of the Helmholtz equation in complex media. In CLF the EM fields are expressed as collection of overlapping local fields called patches. In a 2D homogeneous medium we show that the local field in a given FD cell can be approximated by truncated Fourier-Bessel series (FBS) and the FBS coefficients are related to the control points on the surface of the given patch. As part of the effort for extending CLF capability to modeling EM waves in inhomogeneous media, we report in this paper, two numerical techniques for obtaining 2D CLF-based compact frequency-domain stencils for EM fields and waves near a dielectric interface.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123998285","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657350
Liu Kai, Gaofeng Guo, Li En, Yuan-ci Gao
In this paper, a wide-band power divider utilized stripline to slotline transition is presented. The power divider uses two different transmission lines- stripline and slotline. The slotline was etched on the ground plane at an angle of 90 degree with the stripline. An improved open/ short end structures were employed to achieve the wide-band performance. The simulated results show that the proposed power divider exhibits a return loss better than 12dB, insertion loss less than 1.0dB, isolation loss better than 7dB, phase imbalance about 180°± 0.2° and amplitude imbalance about ±0.03dB across the band from 2-8GHz. The proposed device has a compact size with a dimension of 30mm×35mm.
{"title":"A novel compact wide-band out-of-phase power divider based on stripline-slotline transition","authors":"Liu Kai, Gaofeng Guo, Li En, Yuan-ci Gao","doi":"10.1109/CSQRWC.2013.6657350","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657350","url":null,"abstract":"In this paper, a wide-band power divider utilized stripline to slotline transition is presented. The power divider uses two different transmission lines- stripline and slotline. The slotline was etched on the ground plane at an angle of 90 degree with the stripline. An improved open/ short end structures were employed to achieve the wide-band performance. The simulated results show that the proposed power divider exhibits a return loss better than 12dB, insertion loss less than 1.0dB, isolation loss better than 7dB, phase imbalance about 180°± 0.2° and amplitude imbalance about ±0.03dB across the band from 2-8GHz. The proposed device has a compact size with a dimension of 30mm×35mm.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122853869","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657411
Zhu Xiangqin, Chen Weiqing, W. Jianguo, Zhang Guowei, Cai Libing
Parallelized finite-difference time-domain(FDTD) method for simulating the bounded wave electromagnetic pulse (EMP) simulator with lumped terminator and parallel plate is presented. The effects of several model-parameters of simulator to the electric fields in the working volume are simulated and analyzed. The results show that (1) if the width of below PEC plate is (or is bigger than) 1.5 times as that of upper plate of working volume, the projection length of front transitional section does not have a significant effect on the rise-times of electric fields at the points near the front transitional section, and the rise-times of electric fields at the points near the working volume center decrease as the projection length increases, but the decrease of rise-time reduces. (2) if the projection length of the front transitional section's fixed, the fast rise-times of electric fields in working volume can't be got by increasing or decreasing the height of simulator as possible. if the projection length is 31.68m, the optimal height of simulator is 11.2m.
{"title":"Parallelized simulation for large flat-plate bounded wave EMP simulator with lumped terminator","authors":"Zhu Xiangqin, Chen Weiqing, W. Jianguo, Zhang Guowei, Cai Libing","doi":"10.1109/CSQRWC.2013.6657411","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657411","url":null,"abstract":"Parallelized finite-difference time-domain(FDTD) method for simulating the bounded wave electromagnetic pulse (EMP) simulator with lumped terminator and parallel plate is presented. The effects of several model-parameters of simulator to the electric fields in the working volume are simulated and analyzed. The results show that (1) if the width of below PEC plate is (or is bigger than) 1.5 times as that of upper plate of working volume, the projection length of front transitional section does not have a significant effect on the rise-times of electric fields at the points near the front transitional section, and the rise-times of electric fields at the points near the working volume center decrease as the projection length increases, but the decrease of rise-time reduces. (2) if the projection length of the front transitional section's fixed, the fast rise-times of electric fields in working volume can't be got by increasing or decreasing the height of simulator as possible. if the projection length is 31.68m, the optimal height of simulator is 11.2m.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133673414","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 : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657363
Han Zhao, Feng Yang, Jia Su
This paper proposes a compact Ku band TE21 mode coupler based on coaxial waveguide. This compact coupler takes only half the length of conventional circular waveguide coupler while maintains at least 55dB rejection of unwanted modes and reaches -6.3dB coupling to each of the rectangular waveguide arms in a bandwidth of 700MHz. The coupler can miniaturise the total length of monopulse system which utilizing TE21 mode for self-tracking.
{"title":"Design of compact coaxial waveguide TE21 mode coupler","authors":"Han Zhao, Feng Yang, Jia Su","doi":"10.1109/CSQRWC.2013.6657363","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657363","url":null,"abstract":"This paper proposes a compact Ku band TE21 mode coupler based on coaxial waveguide. This compact coupler takes only half the length of conventional circular waveguide coupler while maintains at least 55dB rejection of unwanted modes and reaches -6.3dB coupling to each of the rectangular waveguide arms in a bandwidth of 700MHz. The coupler can miniaturise the total length of monopulse system which utilizing TE21 mode for self-tracking.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134483983","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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