Pub Date : 2013-07-21DOI: 10.1109/CSQRWC.2013.6657377
Shugang Jiang, B. Wei, Yu Zhang
With the development of parallel MPI technique, parallel FDTD can solve electric large problems. In this paper, the parallel FDTD algorithm based on MPI is applied to analyze the near-field characteristics of an airborne ultrashort wave antenna. Meanwhile the parallel efficiency of the code is tested on Shanghai Supercomputer Center platform. According to the analysis, the near-field characteristic distribution figures of the airborne antenna are obtained.
{"title":"Analysis of near-field characteristic of airborne antenna","authors":"Shugang Jiang, B. Wei, Yu Zhang","doi":"10.1109/CSQRWC.2013.6657377","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657377","url":null,"abstract":"With the development of parallel MPI technique, parallel FDTD can solve electric large problems. In this paper, the parallel FDTD algorithm based on MPI is applied to analyze the near-field characteristics of an airborne ultrashort wave antenna. Meanwhile the parallel efficiency of the code is tested on Shanghai Supercomputer Center platform. According to the analysis, the near-field characteristic distribution figures of the airborne antenna are obtained.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"18 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":"114432778","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.2013.6657407
Yongjiu Li, Long Li, Yongliang Zhang, Chunsheng Zhao
In this paper, a novel multilayer frequency selective surface (FSS) with fractal structures is designed using subwavelength element based on the antenna-filter-antenna (AFA) concept. The upper fractal patches are inductive and non-resonant, and the fractal slots on the ground provide a capacitance. The thin substrate is equivalent to a transformer and a resonant frequency is formed. The cell periods along x and y directions are the same and the total height is the 8mm (λ / 3.75 at center operating frequency 10 GHz). Moreover, the fractional bandwidth reaches 30%. To well analyze and understand the operating mechanism of the FSS, the equivalent circuit model is proposed to analyze the transmission and reflection characteristics. The results of the simulation agree well with the results of the synthesis.
{"title":"A novel subwavelength fractal frequency selective surface based on antenna-filter-antenna","authors":"Yongjiu Li, Long Li, Yongliang Zhang, Chunsheng Zhao","doi":"10.1109/CSQRWC.2013.6657407","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657407","url":null,"abstract":"In this paper, a novel multilayer frequency selective surface (FSS) with fractal structures is designed using subwavelength element based on the antenna-filter-antenna (AFA) concept. The upper fractal patches are inductive and non-resonant, and the fractal slots on the ground provide a capacitance. The thin substrate is equivalent to a transformer and a resonant frequency is formed. The cell periods along x and y directions are the same and the total height is the 8mm (λ / 3.75 at center operating frequency 10 GHz). Moreover, the fractional bandwidth reaches 30%. To well analyze and understand the operating mechanism of the FSS, the equivalent circuit model is proposed to analyze the transmission and reflection characteristics. The results of the simulation agree well with the results of the synthesis.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"221 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":"116065878","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.2013.6657450
Der-Chin Chen, C. Tien, Shih-Wen Lee, Zeng-Jia Chuang
In this paper we demonstrate a new technique in which we use the Portable Brain Wave Refractometer (PBWR) to rapidly and accurately measure the error of refraction of eye. The aim of this study is to evaluate PBWR as a minimally invasive method of measuring the attention, meditation levels and the error of refraction of myoptic vision. Two psychologically-based tests were conducted to assess the suitability of the brain wave device to measure and categorize a user's level of attention and meditation. The two states of brain wave represent the normal or abnormal visions. The electroencephalography (EEG) lies in the mobile recording and real time feedback of emotional and cognitive states. This fast testing method for correcting the error of refraction of myopic vision can get the visual acuity (V.A.) to 0.8-1.2.
{"title":"Portable Brain Wave Refractometer","authors":"Der-Chin Chen, C. Tien, Shih-Wen Lee, Zeng-Jia Chuang","doi":"10.1109/CSQRWC.2013.6657450","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657450","url":null,"abstract":"In this paper we demonstrate a new technique in which we use the Portable Brain Wave Refractometer (PBWR) to rapidly and accurately measure the error of refraction of eye. The aim of this study is to evaluate PBWR as a minimally invasive method of measuring the attention, meditation levels and the error of refraction of myoptic vision. Two psychologically-based tests were conducted to assess the suitability of the brain wave device to measure and categorize a user's level of attention and meditation. The two states of brain wave represent the normal or abnormal visions. The electroencephalography (EEG) lies in the mobile recording and real time feedback of emotional and cognitive states. This fast testing method for correcting the error of refraction of myopic vision can get the visual acuity (V.A.) to 0.8-1.2.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"1 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":"115090414","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.2013.6657446
Peng Peng, Chuang-ming Tong, Jiajia Sun, Li Dan, Wang Tong
The dynamic Radar cross section (RCS) feature of ballistic missile target in its boost phase of flight is important, because it shows the missile' s dynamic characteristics which are the key to early detection and pre-warning. In this paper, a typical trajectory of the ballistic missile in the boost phase is simulated. A quasi-static method in conjunction with the Methods of Moment (MoM) algorithm is used to simulate dynamic RCS with the dynamic RCS features extracted. The joint distribution of mean value and variance shows trajectory characteristics in the boost phase and the mean and autocorrelation function better shows the period of missile self-spinning.
{"title":"Dynamic RCS feature of ballistic missile for detection and classification in the boost phase","authors":"Peng Peng, Chuang-ming Tong, Jiajia Sun, Li Dan, Wang Tong","doi":"10.1109/CSQRWC.2013.6657446","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657446","url":null,"abstract":"The dynamic Radar cross section (RCS) feature of ballistic missile target in its boost phase of flight is important, because it shows the missile' s dynamic characteristics which are the key to early detection and pre-warning. In this paper, a typical trajectory of the ballistic missile in the boost phase is simulated. A quasi-static method in conjunction with the Methods of Moment (MoM) algorithm is used to simulate dynamic RCS with the dynamic RCS features extracted. The joint distribution of mean value and variance shows trajectory characteristics in the boost phase and the mean and autocorrelation function better shows the period of missile self-spinning.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"108 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":"124807794","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.2013.6657426
Hang Xiao, K. Huo, Weidong Jiang
Aiming at the application of the OFDM wideband imaging radar, a new chaotic phase-coded OFDM (COFDM) signal is advanced in this paper, which has many advantages, such as flexible code, agile length and so on. And then, a method based on chaotic decoding and sub-carrier bandwidth synthesis is proposed to realize pulse compression of this signal. Finally, experiments validate its pleasant performance of high range resolution and anti-jamming, comparing with P3 and P4 code.
{"title":"A new chaotic phase-coded OFDM signal and its characteristic","authors":"Hang Xiao, K. Huo, Weidong Jiang","doi":"10.1109/CSQRWC.2013.6657426","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657426","url":null,"abstract":"Aiming at the application of the OFDM wideband imaging radar, a new chaotic phase-coded OFDM (COFDM) signal is advanced in this paper, which has many advantages, such as flexible code, agile length and so on. And then, a method based on chaotic decoding and sub-carrier bandwidth synthesis is proposed to realize pulse compression of this signal. Finally, experiments validate its pleasant performance of high range resolution and anti-jamming, comparing with P3 and P4 code.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"1 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":"129573997","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.2013.6657338
J. Y. Jin, X. Q. Lin, X. Deng, Y. Fan
In this paper, we proposed a novel miniaturized waveguide bandpass filter, which filled with anisotropic uniaxial meta-material with transversal negative effective permeability. The theoretical analysis is presented. A sample using the W-band standard waveguide to operate at Ka-band is simulated. From the simulation, it can be concluded that the filter has large band rejection and high selectivity. The 3-dB relative bandwidth is 3.8% at the center frequency of 34.83 GHz.
{"title":"A novel miniaturized waveguide bandpass filter using meta-material","authors":"J. Y. Jin, X. Q. Lin, X. Deng, Y. Fan","doi":"10.1109/CSQRWC.2013.6657338","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657338","url":null,"abstract":"In this paper, we proposed a novel miniaturized waveguide bandpass filter, which filled with anisotropic uniaxial meta-material with transversal negative effective permeability. The theoretical analysis is presented. A sample using the W-band standard waveguide to operate at Ka-band is simulated. From the simulation, it can be concluded that the filter has large band rejection and high selectivity. The 3-dB relative bandwidth is 3.8% at the center frequency of 34.83 GHz.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"1 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":"129680303","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}
The traditional transmission line equations are applied to analyze the circuit parameters of the ladder-type lossless microstrip lines. The distributed capacitance and inductance of the ladder-type microstrip lines are extracted. By changing the structural and electric parameters of microstrip lines, the variation of distributed circuit with different substrate dielectric constants and cutting angles of ladder-type lines are obtained. Three kinds of transition angle (0°, 45°, 60°) and three kinds of dielectric constant (3.9, 4.2, 4.5), which are commonly used parameters in actual interconnector design, are discussed.
{"title":"Study on the distributed capacitance and inductance of ladder-type lossless microstrip lines","authors":"Ruigang Fu, Hui Zhang, Zengrui Li, Junhong Wang, Q. Guo, Xueqin Zhang","doi":"10.1109/CSQRWC.2013.6657360","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657360","url":null,"abstract":"The traditional transmission line equations are applied to analyze the circuit parameters of the ladder-type lossless microstrip lines. The distributed capacitance and inductance of the ladder-type microstrip lines are extracted. By changing the structural and electric parameters of microstrip lines, the variation of distributed circuit with different substrate dielectric constants and cutting angles of ladder-type lines are obtained. Three kinds of transition angle (0°, 45°, 60°) and three kinds of dielectric constant (3.9, 4.2, 4.5), which are commonly used parameters in actual interconnector design, are discussed.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"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":"128343879","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.2013.6657364
Xin Dai, Xiu Yin Zhang, Z. Cai
This paper presents a low-temperature co-fired ceramic (LTCC) dual-band bandpass filter with compact size and high selectivity. By using one set of stepped impedance resonators (SIRs), a 2.45/5.2GHz dual band filter is achieved. A novel source-load coupling is induced to generate three transmission zeros (TZs), resulting in high selectivity. The circuit size is 2.8 mm×2.5 mm×0.8 mm. The filter responses are presented to verify the theoretical predications.
{"title":"Compact LTCC dual-band bandpass filter using stepped impedance resonators","authors":"Xin Dai, Xiu Yin Zhang, Z. Cai","doi":"10.1109/CSQRWC.2013.6657364","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657364","url":null,"abstract":"This paper presents a low-temperature co-fired ceramic (LTCC) dual-band bandpass filter with compact size and high selectivity. By using one set of stepped impedance resonators (SIRs), a 2.45/5.2GHz dual band filter is achieved. A novel source-load coupling is induced to generate three transmission zeros (TZs), resulting in high selectivity. The circuit size is 2.8 mm×2.5 mm×0.8 mm. The filter responses are presented to verify the theoretical predications.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"53 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":"116749532","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.2013.6657455
Ling Xiong, Lin-wei Xiao, Binbin Dan, Jie Ma
Advantages of gravity gradient measurement, such as sensitivity to the shallow substance, high accuracy and unsensitivity to the accelerations in the various directions, are with the great significance to the submarine navigation. A distance between the measured full tensor gravity gradients and those predictions from INS and the digital terrain elevation map is defined and a kind of the gravity gradient-aided navigation methods based on nearest matching neural network is proposed in this paper. In the novel navigation systems, the measured full tensor gravity gradients is as inputs of nearest matching neural network, the full tensor gravity gradients evaluations is as weights between the input layer and the middle layer of nearest matching neural network, the output function is defined and the variable interested domain matching strategy is adopted to correct the INS errors. Simulation results show that an ideal matching probability can be got.
{"title":"Full tensor gravity gradient aided navigation based on nearest matching neural network","authors":"Ling Xiong, Lin-wei Xiao, Binbin Dan, Jie Ma","doi":"10.1109/CSQRWC.2013.6657455","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657455","url":null,"abstract":"Advantages of gravity gradient measurement, such as sensitivity to the shallow substance, high accuracy and unsensitivity to the accelerations in the various directions, are with the great significance to the submarine navigation. A distance between the measured full tensor gravity gradients and those predictions from INS and the digital terrain elevation map is defined and a kind of the gravity gradient-aided navigation methods based on nearest matching neural network is proposed in this paper. In the novel navigation systems, the measured full tensor gravity gradients is as inputs of nearest matching neural network, the full tensor gravity gradients evaluations is as weights between the input layer and the middle layer of nearest matching neural network, the output function is defined and the variable interested domain matching strategy is adopted to correct the INS errors. Simulation results show that an ideal matching probability can be got.","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":"117093672","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.2013.6657352
F. Cheng, Xianqi Lin, Z. Kang, K. Song, Yong Fan
This paper introduces a novel wide stopband microstrip bandpass filter working at 2 GHz. Stepped-impedance quarter-wavelength resonators are used here to reduce the size of the filter. Mixed electric and magnetic coupling between the resonators are adopted to introduce two transmission zeros on each side of the passband. Thus, the selectivity of the filter is improved. Also, due to the cancellation of the electric coupling and the magnetic coupling, the first spurious passband is suppressed and the stopband rejection is more than 20 dB up to 10 GHz. The measured results show that the filter is working at a center frequency of 1.95 GHz, with a fractional bandwidth of 5%. Simulated and measured results agree with each other very well.
{"title":"A wide-stopband microstrip bandpass filter using mixed electric and magnetic coupled resonators","authors":"F. Cheng, Xianqi Lin, Z. Kang, K. Song, Yong Fan","doi":"10.1109/CSQRWC.2013.6657352","DOIUrl":"https://doi.org/10.1109/CSQRWC.2013.6657352","url":null,"abstract":"This paper introduces a novel wide stopband microstrip bandpass filter working at 2 GHz. Stepped-impedance quarter-wavelength resonators are used here to reduce the size of the filter. Mixed electric and magnetic coupling between the resonators are adopted to introduce two transmission zeros on each side of the passband. Thus, the selectivity of the filter is improved. Also, due to the cancellation of the electric coupling and the magnetic coupling, the first spurious passband is suppressed and the stopband rejection is more than 20 dB up to 10 GHz. The measured results show that the filter is working at a center frequency of 1.95 GHz, with a fractional bandwidth of 5%. Simulated and measured results agree with each other very well.","PeriodicalId":355180,"journal":{"name":"2013 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference","volume":"117 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":"122147231","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：