Pub Date : 2012-07-05DOI: 10.1109/ICMMT.2012.6230052
Zhengbo Jiang, Ling Tian, Jin Liu, Wenhu Xu
Carrier frequency offset estimation and adjustment is essential to wireless communication receiver. Scanning receiver is both a receiver and a wireless communication measurement instrument, and carrier frequency offset affects both receiver performance and measurement accuracy. In this paper, we introduced a phase based algorithm for frequency offset estimation, experiments and analysis were also given to verify its effectivity and limitations. To compensate the drawback of phase based algorithm and to significantly improve the estimation accuracy, GPS based algorithm was also proposed in this paper.
{"title":"Practical carrier frequency offset estimation schemes for TD-SCDMA scanning receiver","authors":"Zhengbo Jiang, Ling Tian, Jin Liu, Wenhu Xu","doi":"10.1109/ICMMT.2012.6230052","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230052","url":null,"abstract":"Carrier frequency offset estimation and adjustment is essential to wireless communication receiver. Scanning receiver is both a receiver and a wireless communication measurement instrument, and carrier frequency offset affects both receiver performance and measurement accuracy. In this paper, we introduced a phase based algorithm for frequency offset estimation, experiments and analysis were also given to verify its effectivity and limitations. To compensate the drawback of phase based algorithm and to significantly improve the estimation accuracy, GPS based algorithm was also proposed in this paper.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123667333","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 : 2012-07-05DOI: 10.1109/ICMMT.2012.6230276
Honggang Yin, Zhang Peng, Guo Yang, You Ran, Yang Hu, Shang Jian, Wu Qiong, A. Dawei
It has been demonstrated that radiometric correction field experiment is very important for the spaceborne sensors to inspect their calibration accuracy. 2011 microwave radiometric correction experiment for the payloads on FengYun-3 meteorological satellites was carried out for two weeks on November at the microwave radiometric correction site of China located in Pu'er. In this paper, the procedure and the data processing approach of the field experiment are described. And the preliminary results are analyzed in the end.
{"title":"Field experiment at the microwave radiometric correction site of China in 2011","authors":"Honggang Yin, Zhang Peng, Guo Yang, You Ran, Yang Hu, Shang Jian, Wu Qiong, A. Dawei","doi":"10.1109/ICMMT.2012.6230276","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230276","url":null,"abstract":"It has been demonstrated that radiometric correction field experiment is very important for the spaceborne sensors to inspect their calibration accuracy. 2011 microwave radiometric correction experiment for the payloads on FengYun-3 meteorological satellites was carried out for two weeks on November at the microwave radiometric correction site of China located in Pu'er. In this paper, the procedure and the data processing approach of the field experiment are described. And the preliminary results are analyzed in the end.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127037911","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 : 2012-07-05DOI: 10.1109/ICMMT.2012.6230048
Zhao Hao, Xu Dawang
In RF/microwave power measurement using diodes, the detecting inherent characteristics lead to an open-loop measurement because there is no DC-substitution. Sensitivity and linearity differences between sensors or the drift due to aging or temperature can result in a different DC output voltage for the same RF power. So a calibrator is needed to absolute the incident power. In this paper, after the common principles of power reference source are presented, a dynamic calibrator source with high accuracy and linearity is fully discussed. The emphases are put on the methods to ensure the technical specifications associated with the accuracy, linearity, and temperature stability. The results show that the techniques of Automatic-Level-Control, the software compensation and synchronous detection compensation can dramatically improve the key performances.
{"title":"Design of a dynamic calibrator with high accuracy and linearity","authors":"Zhao Hao, Xu Dawang","doi":"10.1109/ICMMT.2012.6230048","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230048","url":null,"abstract":"In RF/microwave power measurement using diodes, the detecting inherent characteristics lead to an open-loop measurement because there is no DC-substitution. Sensitivity and linearity differences between sensors or the drift due to aging or temperature can result in a different DC output voltage for the same RF power. So a calibrator is needed to absolute the incident power. In this paper, after the common principles of power reference source are presented, a dynamic calibrator source with high accuracy and linearity is fully discussed. The emphases are put on the methods to ensure the technical specifications associated with the accuracy, linearity, and temperature stability. The results show that the techniques of Automatic-Level-Control, the software compensation and synchronous detection compensation can dramatically improve the key performances.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129321019","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 : 2012-07-05DOI: 10.1109/ICMMT.2012.6229919
H. M. Li, F. Wang, M. Xia
A Time Domain Integral Equation (TDIE) approach combined with Impedance Boundary Condition (IBC) for analysis of transient scattering by conductors coated with absorbing material is developed. The IBC is considered to be dependent on local incident direction and polarization property. Numerical results are compared with the analytical MIE series solutions and found in good agreements, demonstrating that the proposed procedure is stable, accurate and efficient.
{"title":"IBC-based TDIE solver for transient scattering by coated conductors","authors":"H. M. Li, F. Wang, M. Xia","doi":"10.1109/ICMMT.2012.6229919","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6229919","url":null,"abstract":"A Time Domain Integral Equation (TDIE) approach combined with Impedance Boundary Condition (IBC) for analysis of transient scattering by conductors coated with absorbing material is developed. The IBC is considered to be dependent on local incident direction and polarization property. Numerical results are compared with the analytical MIE series solutions and found in good agreements, demonstrating that the proposed procedure is stable, accurate and efficient.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130639016","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 : 2012-07-05DOI: 10.1109/ICMMT.2012.6230160
Geng Lin, wang guangming, Zhang Chenxin, Zeng Huiyong
This article proposes a fractal composite right/left-handed (CRLH) transmission line (TL). Its unit-cell is constructed by inserting a gap and 2-iteration Wunderlich-fractal short curves into a CPW-type structure. A two-unit-cell zeroth-order resonant (ZOR) antenna based on the CRLH TL is designed. The measured results show that the antenna provides smaller electronic size (0.16 λ0 × 0.13 λ0) and wider bandwidth (1.78%) than reported compact ZOR antennas.
{"title":"Fractal composite right/left-handed transmission line and its application in zeroth-order resonant antenna","authors":"Geng Lin, wang guangming, Zhang Chenxin, Zeng Huiyong","doi":"10.1109/ICMMT.2012.6230160","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230160","url":null,"abstract":"This article proposes a fractal composite right/left-handed (CRLH) transmission line (TL). Its unit-cell is constructed by inserting a gap and 2-iteration Wunderlich-fractal short curves into a CPW-type structure. A two-unit-cell zeroth-order resonant (ZOR) antenna based on the CRLH TL is designed. The measured results show that the antenna provides smaller electronic size (0.16 λ0 × 0.13 λ0) and wider bandwidth (1.78%) than reported compact ZOR antennas.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122507265","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 : 2012-07-05DOI: 10.1109/ICMMT.2012.6230083
Dongya Shen, Guangtao Wang, Lan Li, Xiupu Zhang, Xinfang Shuai
A novel wideband planar fractal antenna is proposed. It is formed by the modified Sierpinski-carpet fractal with the 50 Ω micro-strip. Good input return loss performance is seen over a 2 to 4.5 GHz bandwidth, and acceptable patterns are seen over frequency range whose return loss is smaller than -10 dB.
{"title":"A novel wideband planar fractal antenna","authors":"Dongya Shen, Guangtao Wang, Lan Li, Xiupu Zhang, Xinfang Shuai","doi":"10.1109/ICMMT.2012.6230083","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230083","url":null,"abstract":"A novel wideband planar fractal antenna is proposed. It is formed by the modified Sierpinski-carpet fractal with the 50 Ω micro-strip. Good input return loss performance is seen over a 2 to 4.5 GHz bandwidth, and acceptable patterns are seen over frequency range whose return loss is smaller than -10 dB.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129374966","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 : 2012-05-05DOI: 10.1109/ICMMT.2012.6230154
Zhang Yang, Qiu Jing-hui, Guo Wenbin, Yang Cai-tian
Based on the conventional ultra-wide band (UWB) circular disk monopole antenna, a novel omni-directional dipole antenna is investigated both numerically and experimentally in this paper. The results demonstrate that the antenna can work well in the 1.75GHz~40GHz frequency range. Compared with the conventional antenna, the proposed antenna has better omni-direction characteristics in H-plane radiation pattern and the main direction of the E-plane radiation pattern keeps stable. The proposed antenna provides the valuable reference for the future ultra-wide band omni-directional antenna design and shows great value in the fields of communication and radar system.
{"title":"Novel ultra-wide band omni-directional dipole antenna","authors":"Zhang Yang, Qiu Jing-hui, Guo Wenbin, Yang Cai-tian","doi":"10.1109/ICMMT.2012.6230154","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230154","url":null,"abstract":"Based on the conventional ultra-wide band (UWB) circular disk monopole antenna, a novel omni-directional dipole antenna is investigated both numerically and experimentally in this paper. The results demonstrate that the antenna can work well in the 1.75GHz~40GHz frequency range. Compared with the conventional antenna, the proposed antenna has better omni-direction characteristics in H-plane radiation pattern and the main direction of the E-plane radiation pattern keeps stable. The proposed antenna provides the valuable reference for the future ultra-wide band omni-directional antenna design and shows great value in the fields of communication and radar system.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117057330","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 : 2012-05-05DOI: 10.1109/ICMMT.2012.6230439
Jia-Jie Yuan, Xue‐Song Yang, Z. Tian, Shi-Gui Qiu, Qingyuan Wu, Bing-Zhong Wang
A multipath delay model for indoor ultra-wideband (UWB) systems is proposed. The researches are based on a time-domain channel measurement carried out in a laboratory environment. The channel behaviors of two typical scenarios-Line of Sight (LOS) and None Line of Sight (NLOS) are studied. A new shadowing distribution of channel gain is observed in both scenarios, i.e., the amplitude-delay distribution of channel coefficients follows a single-exponential decay law while the first path component is much stronger. A multipath delay model is proposed to describe the decay characteristic of multipath. The proposed channel model has only five parameters, which are easy to be obtained. The simulation results based on the proposed model are compared with the measurement results, and they agree well with each other.
{"title":"A multipath delay model for indoor ultra-wideband systems","authors":"Jia-Jie Yuan, Xue‐Song Yang, Z. Tian, Shi-Gui Qiu, Qingyuan Wu, Bing-Zhong Wang","doi":"10.1109/ICMMT.2012.6230439","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230439","url":null,"abstract":"A multipath delay model for indoor ultra-wideband (UWB) systems is proposed. The researches are based on a time-domain channel measurement carried out in a laboratory environment. The channel behaviors of two typical scenarios-Line of Sight (LOS) and None Line of Sight (NLOS) are studied. A new shadowing distribution of channel gain is observed in both scenarios, i.e., the amplitude-delay distribution of channel coefficients follows a single-exponential decay law while the first path component is much stronger. A multipath delay model is proposed to describe the decay characteristic of multipath. The proposed channel model has only five parameters, which are easy to be obtained. The simulation results based on the proposed model are compared with the measurement results, and they agree well with each other.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"11 14","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120822656","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 : 2012-05-05DOI: 10.1109/ICMMT.2012.6230067
H. Xu, Q. Yan, Y. Wu, Z. Ye, R. Chen
A spectral-element time-domain method is presented to solve the problems of transient electromagnetic scattering. It has the advantages of spectral accuracy and block-diagonal mass matrix. This technique is based on Gauss-Lobatto-Legendre polynomials and Galerkin's method is used for spatial discretization. The perfectly matched layer is employed to truncate the boundary in unbounded problems. Active Frequency selective surface is analyzed in the last part and numerical results demonstrate the accuracy of the method.
{"title":"Analysis of transient electromagnetic scattering using spectral-element time-domain method","authors":"H. Xu, Q. Yan, Y. Wu, Z. Ye, R. Chen","doi":"10.1109/ICMMT.2012.6230067","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230067","url":null,"abstract":"A spectral-element time-domain method is presented to solve the problems of transient electromagnetic scattering. It has the advantages of spectral accuracy and block-diagonal mass matrix. This technique is based on Gauss-Lobatto-Legendre polynomials and Galerkin's method is used for spatial discretization. The perfectly matched layer is employed to truncate the boundary in unbounded problems. Active Frequency selective surface is analyzed in the last part and numerical results demonstrate the accuracy of the method.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121067464","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 : 2012-05-05DOI: 10.1109/ICMMT.2012.6230164
X. Guan, H. Deng, Haiwen Liu, Chuanyun Wang, Zhiwei Liu
A band-notch ultra wideband monopole antenna is presented in this paper. Firstly, an ultra-wideband monopole antenna is designed using a radial patch. The path is fed by using microstrip line. The return loss of the antenna is less than -10dB within the frequency range of UWB system, i.e. from 3.1GHz to 10.6GHz. To restrain the interference between UWB and WLAN a notch band shall be inserted in the UWB passband. Two symmetrical microstrip resonators are externally loaded to the microstrip feed line to form a notch band. The frequency range of notch band can be controlled by adjusting the size and the position of the loaded resonator. A notch band from 5.2GHz to 5.8GHz is achieved. As the experimental results show the proposed antenna has steady characteristics of radiation direction and gain on the whole working frequency range.
{"title":"Novel band-notch monopole ultra-wideband antenna with external load","authors":"X. Guan, H. Deng, Haiwen Liu, Chuanyun Wang, Zhiwei Liu","doi":"10.1109/ICMMT.2012.6230164","DOIUrl":"https://doi.org/10.1109/ICMMT.2012.6230164","url":null,"abstract":"A band-notch ultra wideband monopole antenna is presented in this paper. Firstly, an ultra-wideband monopole antenna is designed using a radial patch. The path is fed by using microstrip line. The return loss of the antenna is less than -10dB within the frequency range of UWB system, i.e. from 3.1GHz to 10.6GHz. To restrain the interference between UWB and WLAN a notch band shall be inserted in the UWB passband. Two symmetrical microstrip resonators are externally loaded to the microstrip feed line to form a notch band. The frequency range of notch band can be controlled by adjusting the size and the position of the loaded resonator. A notch band from 5.2GHz to 5.8GHz is achieved. As the experimental results show the proposed antenna has steady characteristics of radiation direction and gain on the whole working frequency range.","PeriodicalId":421574,"journal":{"name":"2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124856630","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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