Pub Date : 2006-10-01DOI: 10.1109/ISAPE.2006.353345
A. H. Khanmirzaei, M. S. Abrishamian, T. Pakizeh
Notch filters in photonic crystal (PC) structures play an important role in designing integrated photonic circuits. One way to making such filters is cavity waveguide coupling in PC structures. In this work, we introduce a new kind of such filters that contains cavities with open structure.
{"title":"A New Kind of Optical Notch Filters in Photonic Crystals Using Cavities with Open Structure","authors":"A. H. Khanmirzaei, M. S. Abrishamian, T. Pakizeh","doi":"10.1109/ISAPE.2006.353345","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353345","url":null,"abstract":"Notch filters in photonic crystal (PC) structures play an important role in designing integrated photonic circuits. One way to making such filters is cavity waveguide coupling in PC structures. In this work, we introduce a new kind of such filters that contains cavities with open structure.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123974097","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353539
Aixin Chen, Huijuan Zuo, Aihong Chen, D. Su
In the finite element method (FEM), the matrix equation can be solved either using a direct elimination method or an iterative method. The conjugate gradient (CG) is a common-used iterative method. But there are several limits in its application. In order to overcome the disadvantages, a preconditioned conjugate gradient (PCG) method based on the incomplete Cholesky decomposition is introduced in this paper. And this PCG method is applied to the analysis of an electromagnetic wave tool.
{"title":"Preconditioned Conjugate Gradient Method for the Analysis of an Electromagnetic Wave Tool","authors":"Aixin Chen, Huijuan Zuo, Aihong Chen, D. Su","doi":"10.1109/ISAPE.2006.353539","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353539","url":null,"abstract":"In the finite element method (FEM), the matrix equation can be solved either using a direct elimination method or an iterative method. The conjugate gradient (CG) is a common-used iterative method. But there are several limits in its application. In order to overcome the disadvantages, a preconditioned conjugate gradient (PCG) method based on the incomplete Cholesky decomposition is introduced in this paper. And this PCG method is applied to the analysis of an electromagnetic wave tool.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123199286","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353582
H. Long, X. Zhi, Z. Y. Zhong
Nuclear magnet resonance (NMR) logging is an advanced method in formation evaluation and oil field production. It can provide the porosity, permeability, bound water volume, free fluid volume and oil viscosity. NMR logging is playing more and more important roles in oil and gas exploitation. The antenna is a core of NMR logging tools. It can transmit the electromagnetic wave and receive the NMR signal. As the NMR logging signal intensity and resolution is influenced by the antenna length, the antenna design is very important for NMR sonde design. The more antenna length is, the more signal intensity is, but the weaker vertical resolution is. In order to optimize the antenna design and accelerate the development of NMR logging tools, a FEM mathematic model of B1 magnetic field distribution of NMR logging tools is established in the paper. FEM is applied to solve Bi magnetic distribution of NMR logging tools, which can obtain the currency intensity, determine the sensitive zone, and improve the signal intensity and signal-to-noise ratio.
{"title":"Numerical Simulation of NMR Logging Tools Antenna","authors":"H. Long, X. Zhi, Z. Y. Zhong","doi":"10.1109/ISAPE.2006.353582","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353582","url":null,"abstract":"Nuclear magnet resonance (NMR) logging is an advanced method in formation evaluation and oil field production. It can provide the porosity, permeability, bound water volume, free fluid volume and oil viscosity. NMR logging is playing more and more important roles in oil and gas exploitation. The antenna is a core of NMR logging tools. It can transmit the electromagnetic wave and receive the NMR signal. As the NMR logging signal intensity and resolution is influenced by the antenna length, the antenna design is very important for NMR sonde design. The more antenna length is, the more signal intensity is, but the weaker vertical resolution is. In order to optimize the antenna design and accelerate the development of NMR logging tools, a FEM mathematic model of B1 magnetic field distribution of NMR logging tools is established in the paper. FEM is applied to solve Bi magnetic distribution of NMR logging tools, which can obtain the currency intensity, determine the sensitive zone, and improve the signal intensity and signal-to-noise ratio.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"516 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116224264","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353480
K. U. Kiran, R. Vani, R. Ravi, P. Hunagund
In this paper, a novel compact broadband dual frequency microstrip antenna is presented. The proposed design consists of a rectangular microstrip antenna with a pair of parallel slots loaded close to the radiating edge of the patch and three meandering narrow slots embedded in the antenna's groundplane. Experimental study was carried out by varying the length of the meandering slot. Using three meandering slots in the groundplane a significant lowering of the both resonant frequencies is obtained with an enhanced operational bandwidth in comparison to standard rectangular microstrip antenna without slots. An increase in the bandwidth is more significant for lower resonant frequency. With the proposed design a size reduction of 50.6% and 30% for the two resonant frequencies is obtained with the measured bandwidths of 12.2% and 4.5% respectively. The two frequencies have an operation frequency ratio of 1.40.
{"title":"Slot-loaded Rectangular Microstrip Antenna with Meandering Slots in the Ground Plane for Compact Broadband Dual-frequency Operation","authors":"K. U. Kiran, R. Vani, R. Ravi, P. Hunagund","doi":"10.1109/ISAPE.2006.353480","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353480","url":null,"abstract":"In this paper, a novel compact broadband dual frequency microstrip antenna is presented. The proposed design consists of a rectangular microstrip antenna with a pair of parallel slots loaded close to the radiating edge of the patch and three meandering narrow slots embedded in the antenna's groundplane. Experimental study was carried out by varying the length of the meandering slot. Using three meandering slots in the groundplane a significant lowering of the both resonant frequencies is obtained with an enhanced operational bandwidth in comparison to standard rectangular microstrip antenna without slots. An increase in the bandwidth is more significant for lower resonant frequency. With the proposed design a size reduction of 50.6% and 30% for the two resonant frequencies is obtained with the measured bandwidths of 12.2% and 4.5% respectively. The two frequencies have an operation frequency ratio of 1.40.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114745180","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353557
Zengrui Li, Junhong Wang, Xueqin Zhang
The scattering characteristics of the planar array composed of impedance terminated dipoles are studied by finite difference time domain (FDTD) method. The current distribution on the dipoles and the radar cross section (RCS) of the array are obtained and analyzed. It is seen that the array with inductance terminated dipole tends to give lower RCS. Results of this paper are in agreement with those obtained by moment method.
{"title":"Study on the Scattering Property of the Impedance Terminated Dipole Array by FDTD Method","authors":"Zengrui Li, Junhong Wang, Xueqin Zhang","doi":"10.1109/ISAPE.2006.353557","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353557","url":null,"abstract":"The scattering characteristics of the planar array composed of impedance terminated dipoles are studied by finite difference time domain (FDTD) method. The current distribution on the dipoles and the radar cross section (RCS) of the array are obtained and analyzed. It is seen that the array with inductance terminated dipole tends to give lower RCS. Results of this paper are in agreement with those obtained by moment method.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114837260","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353360
Hu Hao, Ko-Mai Li
This paper reports a novel circularly polarized rectenna designed and measured at 5.8 GHz for application involving microwave power transmission (WPT). A truncated corner square patch microstrip antenna used for the rectenna was developed. The axial ratio achieved was 0.3 dB at 5.82 GHz. A silicon Schottky barrier diode is employed as the rectifying device. Measured conversion efficiency results of the rectenna proved that the rectenna is suitable for component of the WPT system.
{"title":"A Novel 5.8GHz Circularly Polarized Rectenna for Microwave Power Transmission","authors":"Hu Hao, Ko-Mai Li","doi":"10.1109/ISAPE.2006.353360","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353360","url":null,"abstract":"This paper reports a novel circularly polarized rectenna designed and measured at 5.8 GHz for application involving microwave power transmission (WPT). A truncated corner square patch microstrip antenna used for the rectenna was developed. The axial ratio achieved was 0.3 dB at 5.82 GHz. A silicon Schottky barrier diode is employed as the rectifying device. Measured conversion efficiency results of the rectenna proved that the rectenna is suitable for component of the WPT system.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124529325","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353351
Guan-Yu Chen, Jwo-Shiun Sun, Y. Chen, Cheng-Hung Lin, Jui-Yu Yang
In this paper, facilities of antenna measurement have recently commissioned a spherical far-field measurement system. The low profile far-field spherical scan system provides significant advantages over the older far-field testing including elimination of problem of simple theta (thetas) and phi (phi) rotary axis with indoor far-field range testing, complete measurement characterization of the antenna, and improved accuracy. The mobile phone under test of far-field range testing has been the plan at the Cellular Telecommunications & Internet Association (CTIA) certification program test requirements for performing radiated power and receiver performance measurement. This paper will discuss the antenna and wireless system integration tested with the TRP/TIS and spherical antenna measurement for far-field system. The spherical far-field antenna system applied to total radiation efficiency, mean effective gain (EMG) and diversity gain measurement and applications.
{"title":"The 3D Far-Field Antenna Measurement Technology for Radiation Efficiency, Mean Effective Gain and Diversity Antenna Operation","authors":"Guan-Yu Chen, Jwo-Shiun Sun, Y. Chen, Cheng-Hung Lin, Jui-Yu Yang","doi":"10.1109/ISAPE.2006.353351","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353351","url":null,"abstract":"In this paper, facilities of antenna measurement have recently commissioned a spherical far-field measurement system. The low profile far-field spherical scan system provides significant advantages over the older far-field testing including elimination of problem of simple theta (thetas) and phi (phi) rotary axis with indoor far-field range testing, complete measurement characterization of the antenna, and improved accuracy. The mobile phone under test of far-field range testing has been the plan at the Cellular Telecommunications & Internet Association (CTIA) certification program test requirements for performing radiated power and receiver performance measurement. This paper will discuss the antenna and wireless system integration tested with the TRP/TIS and spherical antenna measurement for far-field system. The spherical far-field antenna system applied to total radiation efficiency, mean effective gain (EMG) and diversity gain measurement and applications.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124093157","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 purpose of this work is to design a wideband DTV (Digital TV) antenna with a multiple-structure of transmission line antenna. A technique of varying the width of transmission line antenna is developed firstly to shorten its length. By adding three individual transmission line antenna with different bands together, a wideband characteristics is achieved in the UHF band. This is suitable for digital TV reception, especially for the DVB-T, which is based on the OFDM, because of its near omni-directional pattern.
{"title":"A Wideband DTV Antenna with a Multiple-Structure of Transmission Line Antenna","authors":"Chi-Fang Huang, Ho-Yuan Yan, Shu-Yi Lin, Wei-Lu Hung","doi":"10.1109/ISAPE.2006.353401","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353401","url":null,"abstract":"The purpose of this work is to design a wideband DTV (Digital TV) antenna with a multiple-structure of transmission line antenna. A technique of varying the width of transmission line antenna is developed firstly to shorten its length. By adding three individual transmission line antenna with different bands together, a wideband characteristics is achieved in the UHF band. This is suitable for digital TV reception, especially for the DVB-T, which is based on the OFDM, because of its near omni-directional pattern.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121722837","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353261
Tang Jian, Lisong Tian, X. Ke, J. Mao
The singlet, which contains one resonator and generates one transmission zero, has been introduced as the most basic building block for modular design of elliptic filters. In this paper, we present a computer aided design approach for singlet design. The proposed CAD approach is applied to the design of a singlet with center frequency 28 GHz. It shows good agreement with the synthesized results.
{"title":"Computer Aided Design of the Singlets for Advanced Modular Design of Elliptic Filters","authors":"Tang Jian, Lisong Tian, X. Ke, J. Mao","doi":"10.1109/ISAPE.2006.353261","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353261","url":null,"abstract":"The singlet, which contains one resonator and generates one transmission zero, has been introduced as the most basic building block for modular design of elliptic filters. In this paper, we present a computer aided design approach for singlet design. The proposed CAD approach is applied to the design of a singlet with center frequency 28 GHz. It shows good agreement with the synthesized results.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132033268","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353491
Naiqian Zhang, Dong Li
How to reduce the Peak-to-Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) signals has become one of the key problems in OFDM system. By analyzing the reason of high PAPR, a new nonlinear companding method is proposed to reduce the PAPR in this paper. Then we give the optimal value of the parameter in this scheme. At last, our simulation results confirm that the suggested scheme exhibits good performances in both time and frequency domains by comparing with other methods.
{"title":"A New Nonlinear Companding Method for Reducing Peak-to-Average Power Ratio of OFDM Signals","authors":"Naiqian Zhang, Dong Li","doi":"10.1109/ISAPE.2006.353491","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353491","url":null,"abstract":"How to reduce the Peak-to-Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) signals has become one of the key problems in OFDM system. By analyzing the reason of high PAPR, a new nonlinear companding method is proposed to reduce the PAPR in this paper. Then we give the optimal value of the parameter in this scheme. At last, our simulation results confirm that the suggested scheme exhibits good performances in both time and frequency domains by comparing with other methods.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132563965","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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