Pub Date : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657412
Jiang Lin, Wang Qing-guo, Cheng Er-wei
The field build up process of the electromagnetic pulse in the reverberation chamber(RC) is analyzed. The field built up by the pulses of different peak, rising time, and duration in the reverberation chamber has been studied. The analysis results show that the change of parameters will directly result in changes in the input power and impact on the field in the reverberation chamber. Higher peak values and duration time of the pulse signal will increase the input power, and the ensemble maximum of the field becomes larger. On the contrary, longer rise time will reduce the input power so that more time needed to reach the ensemble maximum value and the forefront of the field waveform becomes gentle, and peak values decrease. Moreover, time domain expressions of the electric field in the reverberation chamber are derived, providing theoretical support to electromagnetic pulse protection test method in the reverberation chamber.
{"title":"Study of the formation and attenuation laws for electromagnetic pulse filed in the RC","authors":"Jiang Lin, Wang Qing-guo, Cheng Er-wei","doi":"10.1109/CSQRWC.2013.6657412","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657412","url":null,"abstract":"The field build up process of the electromagnetic pulse in the reverberation chamber(RC) is analyzed. The field built up by the pulses of different peak, rising time, and duration in the reverberation chamber has been studied. The analysis results show that the change of parameters will directly result in changes in the input power and impact on the field in the reverberation chamber. Higher peak values and duration time of the pulse signal will increase the input power, and the ensemble maximum of the field becomes larger. On the contrary, longer rise time will reduce the input power so that more time needed to reach the ensemble maximum value and the forefront of the field waveform becomes gentle, and peak values decrease. Moreover, time domain expressions of the electric field in the reverberation chamber are derived, providing theoretical support to electromagnetic pulse protection test method in the reverberation chamber.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"59 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":"126219703","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.2013.6657378
Cao Le, Wei Bing, Zhao-Hang Peng, He Qiong
The far field formulation of an arbitrarily oriented electric dipole located at the interface of layered anisotropic half space is deduced based on the reciprocity theorem. Then, considering the optical path difference of the directed wave and reflected wave, the formulation of the electric dipole located above the interface of layered anisotropic half space is discussed. The General Transmitting Matrix (GTM) method is used to compute the reflection coefficients of anisotropic layered half space. Finally, numerical example of the electric dipole located at the interface of anisotropic half space is given. The numerical results show that this method can be used in the fast computation of far radiation field of an arbitrarily oriented dipole above layered anisotropic half space.
{"title":"Computation of far radiation field of an arbitrarily oriented dipole above anisotropic half space","authors":"Cao Le, Wei Bing, Zhao-Hang Peng, He Qiong","doi":"10.1109/CSQRWC.2013.6657378","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657378","url":null,"abstract":"The far field formulation of an arbitrarily oriented electric dipole located at the interface of layered anisotropic half space is deduced based on the reciprocity theorem. Then, considering the optical path difference of the directed wave and reflected wave, the formulation of the electric dipole located above the interface of layered anisotropic half space is discussed. The General Transmitting Matrix (GTM) method is used to compute the reflection coefficients of anisotropic layered half space. Finally, numerical example of the electric dipole located at the interface of anisotropic half space is given. The numerical results show that this method can be used in the fast computation of far radiation field of an arbitrarily oriented dipole above layered anisotropic half space.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"15 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":"126246309","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.2013.6657381
Geng Chen, Lei Zhao, Wen Li, Huadong Zhao, Yuan Wenhua
This paper studies a novel acceleration technique for the FDTD method using new Intel instruction extensions - Intel Advanced Vector Extensions (AVX). We compare two configurations of FDTD algorithm (one enabled with AVX and a second without AVX) and present a performance evolution of the two settings. The numerical results show that the FDTD with AVX gives over 7 times speedup ratio compared to the FDTD without AVX.
{"title":"Performance study of AVX instructions for the FDTD method","authors":"Geng Chen, Lei Zhao, Wen Li, Huadong Zhao, Yuan Wenhua","doi":"10.1109/CSQRWC.2013.6657381","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657381","url":null,"abstract":"This paper studies a novel acceleration technique for the FDTD method using new Intel instruction extensions - Intel Advanced Vector Extensions (AVX). We compare two configurations of FDTD algorithm (one enabled with AVX and a second without AVX) and present a performance evolution of the two settings. The numerical results show that the FDTD with AVX gives over 7 times speedup ratio compared to the FDTD without AVX.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"6 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":"125414156","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.2013.6657356
Tong Chuang-ming, Peng Peng, Li Dan
A novel spiraled compact microstrip resonant cell (SCMRC) is proposed and applied to the design of half-mode substrate integrated waveguide (HMSIW) bandpass filter. SCMRC can lower the cutoff frequency of HMSIW while keeping the size and good transmission characteristics. The HMSIW filter with SCMRC has a passband between 3.46GHz and 3.71GHz, besides, it has both smaller size and better return loss compared with other EBG structure SIW or HMSIW filter. In this paper, such a filter is designed, manufactured and measured. Good agreement between measurement and simulation results demonstrates that the design is effective.
{"title":"A novel design of half-mode substrate integrated waveguide(HMSIW) filter with SCMRC","authors":"Tong Chuang-ming, Peng Peng, Li Dan","doi":"10.1109/CSQRWC.2013.6657356","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657356","url":null,"abstract":"A novel spiraled compact microstrip resonant cell (SCMRC) is proposed and applied to the design of half-mode substrate integrated waveguide (HMSIW) bandpass filter. SCMRC can lower the cutoff frequency of HMSIW while keeping the size and good transmission characteristics. The HMSIW filter with SCMRC has a passband between 3.46GHz and 3.71GHz, besides, it has both smaller size and better return loss compared with other EBG structure SIW or HMSIW filter. In this paper, such a filter is designed, manufactured and measured. Good agreement between measurement and simulation results demonstrates that the design is effective.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"103 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":"128092986","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.2013.6657414
Ruike Yang, Li Li, Zhenwei Zhao, Tongya Lu
Clouds have fractal characteristic, self-similarity structure. In this paper, the fractal theory is used to simulate the spatial distribution of clouds density. Where there is larger density, there is larger liquid water content. Using analogy technique, the distribution of liquid water content in clouds is simulated. Specific attenuation of different liquid water content within clouds is calculated at Ka band. Based on the statistic of liquid water content in clouds at Xi'an area, the cloud specific attenuation and the attenuation of simulating rain cloud are calculated on slant path. It is shown that the clouds and the distribution of liquid water content in the clouds may be simulated by means of fractal. Utilizing the simulated cloud, cloud attenuation may be estimated at Ka band.
{"title":"Cloud simulation and attenuation at Ka band on slant path","authors":"Ruike Yang, Li Li, Zhenwei Zhao, Tongya Lu","doi":"10.1109/CSQRWC.2013.6657414","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657414","url":null,"abstract":"Clouds have fractal characteristic, self-similarity structure. In this paper, the fractal theory is used to simulate the spatial distribution of clouds density. Where there is larger density, there is larger liquid water content. Using analogy technique, the distribution of liquid water content in clouds is simulated. Specific attenuation of different liquid water content within clouds is calculated at Ka band. Based on the statistic of liquid water content in clouds at Xi'an area, the cloud specific attenuation and the attenuation of simulating rain cloud are calculated on slant path. It is shown that the clouds and the distribution of liquid water content in the clouds may be simulated by means of fractal. Utilizing the simulated cloud, cloud attenuation may be estimated at Ka band.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"24 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":"125618153","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, a meandered PIFA antenna with two curved strips extended from ground plane is proposed for WLAN USB dongle application. The meandered PIFA excites a resonant mode at 2.4 GHz while the lower curved strip (strip B) operates two higher modes for 5.2 and 5.8 GHz bands. The upper curved strip (strip A) with a rectangle stub on top of it is used to extend the PIFA's current path and shift the 2.4 GHz band. The upper strip also increases the impedance bandwidth of the higher band. From the simulated and measured S11, the -10 dB operating bands cover the IEEE802.11 a/b/g WLAN applications. To the antenna dimensions, the proposed antenna occupies a very small area of 36.5 mm × 10 mm that can be easily applied in portable wireless devices. In addition, the antenna portion having only 10 mm × 10 mm is relatively small comparing with the published printed antenna.
{"title":"A PIFA type USB Dongle antenna for WLAN applications","authors":"Wen‐Shan Chen, Bau-Yi Lee, Jing-Ju Lu, Ke-Ming Lin, Ching-Yu Huang, Chih-Kai Yang","doi":"10.1109/CSQRWC.2013.6657388","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657388","url":null,"abstract":"In this paper, a meandered PIFA antenna with two curved strips extended from ground plane is proposed for WLAN USB dongle application. The meandered PIFA excites a resonant mode at 2.4 GHz while the lower curved strip (strip B) operates two higher modes for 5.2 and 5.8 GHz bands. The upper curved strip (strip A) with a rectangle stub on top of it is used to extend the PIFA's current path and shift the 2.4 GHz band. The upper strip also increases the impedance bandwidth of the higher band. From the simulated and measured S11, the -10 dB operating bands cover the IEEE802.11 a/b/g WLAN applications. To the antenna dimensions, the proposed antenna occupies a very small area of 36.5 mm × 10 mm that can be easily applied in portable wireless devices. In addition, the antenna portion having only 10 mm × 10 mm is relatively small comparing with the published printed antenna.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"25 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":"117254064","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.2013.6657385
A. Gu, Shiwen Yang, Z. Nie
A well performed miniaturized ultra-wideband conical log spiral antenna is designed and fabricated in this paper. The conical log spiral antenna which is able to cover S to X band is designed and simulated based on the antenna requirement and commercial software HFSS. A microstrip balun (balanced-to-unbalanced transformer) is also designed to match the designed antenna and the coaxial line. Then, the balun is added to the conical spiral antenna, and the whole model is being simulated and optimized. The axial ratio and the VSWR of the low frequency are greatly improved by introducing resistance and absorbing material. The conical log spiral antenna is then fabricated and measured. Measured results are in reasonable agreement with the simulated results, which show that the antenna has a wide beamwidth of about 100°, an axial ratio of less than 3dB and a VSWR of less than 2.0 over an ultrawideband of 6:1.
{"title":"Analysis and design of miniaturized ultra-wideband conical log spiral antennas","authors":"A. Gu, Shiwen Yang, Z. Nie","doi":"10.1109/CSQRWC.2013.6657385","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657385","url":null,"abstract":"A well performed miniaturized ultra-wideband conical log spiral antenna is designed and fabricated in this paper. The conical log spiral antenna which is able to cover S to X band is designed and simulated based on the antenna requirement and commercial software HFSS. A microstrip balun (balanced-to-unbalanced transformer) is also designed to match the designed antenna and the coaxial line. Then, the balun is added to the conical spiral antenna, and the whole model is being simulated and optimized. The axial ratio and the VSWR of the low frequency are greatly improved by introducing resistance and absorbing material. The conical log spiral antenna is then fabricated and measured. Measured results are in reasonable agreement with the simulated results, which show that the antenna has a wide beamwidth of about 100°, an axial ratio of less than 3dB and a VSWR of less than 2.0 over an ultrawideband of 6:1.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"9 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":"131929856","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, a second order Koch fractal log-periodic dipole antenna (LPK2DA) with broadband is proposed. Koch iteration technique has been applied here in order to obtain a small physical size. And the overall size of the proposed antenna is 57.5×88.9×0.5 mm3. The antenna has a broadband which ranges from 2 GHz to 8 GHz. Furthermore, the antenna has end-fire radiation patterns along its horizontal axis, which is very suitable for receiving antennas and conformal applications.
{"title":"A small and wideband second order Koch-fractal log-periodic antenna","authors":"Longdan Tan, Zengrui Li, Q. Guo, Hui Zhang, Jie Wang, Guosheng Liu, Xueqin Zhang","doi":"10.1109/CSQRWC.2013.6657406","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657406","url":null,"abstract":"In this paper, a second order Koch fractal log-periodic dipole antenna (LPK2DA) with broadband is proposed. Koch iteration technique has been applied here in order to obtain a small physical size. And the overall size of the proposed antenna is 57.5×88.9×0.5 mm3. The antenna has a broadband which ranges from 2 GHz to 8 GHz. Furthermore, the antenna has end-fire radiation patterns along its horizontal axis, which is very suitable for receiving antennas and conformal applications.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"272 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":"134039126","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.2013.6657361
Weibo Cui, Xiao Zhang, Xiaonan Lu, Yuxing Ren, Mingzhou Zhan, B. Yan
In this paper, an X-band frequency source based on DDS and PLL whose output is 11.75~12.25GHz is developed. The DDS can be controlled through FPGA and PC. According to fast-locked analysis, low spurious analysis and low phase noise analysis, the optimal loop parameter is selected upon MATLAB simulation. Then low phase noise, frequency agile and low spurious are achieved. On the basis of the test results, the best frequency switching time is less than 10us, the phase-noise is better than -104dBc/Hz@10kHz, the spurious are better than -50dBc and step size 2.5kHz.
{"title":"The design of high performance X-band frequency synthesizer based on DDS and PLL","authors":"Weibo Cui, Xiao Zhang, Xiaonan Lu, Yuxing Ren, Mingzhou Zhan, B. Yan","doi":"10.1109/CSQRWC.2013.6657361","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657361","url":null,"abstract":"In this paper, an X-band frequency source based on DDS and PLL whose output is 11.75~12.25GHz is developed. The DDS can be controlled through FPGA and PC. According to fast-locked analysis, low spurious analysis and low phase noise analysis, the optimal loop parameter is selected upon MATLAB simulation. Then low phase noise, frequency agile and low spurious are achieved. On the basis of the test results, the best frequency switching time is less than 10us, the phase-noise is better than -104dBc/Hz@10kHz, the spurious are better than -50dBc and step size 2.5kHz.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"55 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":"130097966","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.2013.6657428
Hui Guo, W. Fang, Xin Wen, F. Nian
In recent years, how to effectively complement preferable details to an image according to its local information is one of the research focuses in the field of image enhancement. For an image badly lack of local details, the key of image enhancement is to reconstruct the unknown original details in terms of the small amount of known information. To completely or approximately reconstruct an unknown signal by a small number of its known elements is a matrix completion problem in the sparse theory. This paper proposes an image enhancement algorithm based on matrix completion, which implements effective complements of local details to the local blurred image by solving the nuclear norm minimization problem with the method of singular value shrinkage iteration, and achieves image enhancement with fine subjective qualities for human vision.
{"title":"Image enhancement based on matrix completion","authors":"Hui Guo, W. Fang, Xin Wen, F. Nian","doi":"10.1109/CSQRWC.2013.6657428","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657428","url":null,"abstract":"In recent years, how to effectively complement preferable details to an image according to its local information is one of the research focuses in the field of image enhancement. For an image badly lack of local details, the key of image enhancement is to reconstruct the unknown original details in terms of the small amount of known information. To completely or approximately reconstruct an unknown signal by a small number of its known elements is a matrix completion problem in the sparse theory. This paper proposes an image enhancement algorithm based on matrix completion, which implements effective complements of local details to the local blurred image by solving the nuclear norm minimization problem with the method of singular value shrinkage iteration, and achieves image enhancement with fine subjective qualities for human vision.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"38 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":"124821830","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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