Pub Date : 2009-06-01DOI: 10.1109/APS.2009.5171710
Shih-Hao Lee, Jianming Jin
The approximate modal interface—solution space projection (AMI-SSP) [1] is a combined domain decomposition—model order reduction (DD-MOR) algorithm for efficient broadband simulation of multilayer printed circuits. The AMI method solves each layer of a circuit board independently and reduces the problem to a global interface system which couples all the layers. The mesh of each layer can be generated and refined independently without being consistent at a subdomain interface. In the AMI-SSP algorithm, SSP [2] is first performed in each layer to generate reduced-order models, with which the AMI computation is accelerated significantly and a fast frequency sweep is achieved.
{"title":"The approximate modal interface—solution space projection method including internal ports for efficient finite-element analysis of multilayer printed circuits","authors":"Shih-Hao Lee, Jianming Jin","doi":"10.1109/APS.2009.5171710","DOIUrl":"https://doi.org/10.1109/APS.2009.5171710","url":null,"abstract":"The approximate modal interface—solution space projection (AMI-SSP) [1] is a combined domain decomposition—model order reduction (DD-MOR) algorithm for efficient broadband simulation of multilayer printed circuits. The AMI method solves each layer of a circuit board independently and reduces the problem to a global interface system which couples all the layers. The mesh of each layer can be generated and refined independently without being consistent at a subdomain interface. In the AMI-SSP algorithm, SSP [2] is first performed in each layer to generate reduced-order models, with which the AMI computation is accelerated significantly and a fast frequency sweep is achieved.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130064917","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 : 2009-06-01DOI: 10.1109/APS.2009.5172079
D. Van Orden, V. Lomakin
We have presented rapidly hybrid spectral-spatial techniques for the rapid calculation of 3D Green's functions of a linear periodic array residing in near a layered medium. The techniques are based on spectral field expansion over the transverse (to the array's axis) spectral parameter, extraction any singular field components, and efficient integration rules. The techniques are efficient for any complex phase shifts, a wide range of array's periodicities, as well as a wide range of observation locations including those on the array's axis. Numerical examples demonstrate the efficiency of the method.
{"title":"Rapidly convergent Green's function representation for a linear periodic array near layered media","authors":"D. Van Orden, V. Lomakin","doi":"10.1109/APS.2009.5172079","DOIUrl":"https://doi.org/10.1109/APS.2009.5172079","url":null,"abstract":"We have presented rapidly hybrid spectral-spatial techniques for the rapid calculation of 3D Green's functions of a linear periodic array residing in near a layered medium. The techniques are based on spectral field expansion over the transverse (to the array's axis) spectral parameter, extraction any singular field components, and efficient integration rules. The techniques are efficient for any complex phase shifts, a wide range of array's periodicities, as well as a wide range of observation locations including those on the array's axis. Numerical examples demonstrate the efficiency of the method.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130226733","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 : 2009-06-01DOI: 10.1109/APS.2009.5172314
Shadi S. Alshannaq, R. Rojas
Most nonreciprocal microwave devices use magnetized ferrite materials modeled by a permeability tensor. The performance of such devices starts to degrade above 40 GHz due to the upper limit of the saturation magnetization. Bandwidth and integration into the semiconductor-based MMICs are still issues of concern. The availability of spectrum near the 60–77 GHz range as well as the infrared region has increased the demand for improved performance of devices and systems. Fortunately, advancements in semiconductors technology provide alternative materials for nonreciprocal devices. High mobility semiconductors act like solid-state plasmas, and when exposed to a DC magnetic bias, can be modeled as (gyroelectric) anisotropic material, or magnetoplasma. This gives rise to a permittivity tensor, which might be thought of as the dual to magnetized ferrites. Doped semiconductors like InSb and GaAs are usually employed for this purpose. They can work at higher frequencies; up to THz. Also, the offered bandwidth is huge and well exceeds the available bandwidth of most microwave guiding structures. Being a semiconductor, this material is fully compatible with integration, making it an attractive choice for MMICs applications.
{"title":"Fully planar room-temperature circulator based on magnetized semiconductors","authors":"Shadi S. Alshannaq, R. Rojas","doi":"10.1109/APS.2009.5172314","DOIUrl":"https://doi.org/10.1109/APS.2009.5172314","url":null,"abstract":"Most nonreciprocal microwave devices use magnetized ferrite materials modeled by a permeability tensor. The performance of such devices starts to degrade above 40 GHz due to the upper limit of the saturation magnetization. Bandwidth and integration into the semiconductor-based MMICs are still issues of concern. The availability of spectrum near the 60–77 GHz range as well as the infrared region has increased the demand for improved performance of devices and systems. Fortunately, advancements in semiconductors technology provide alternative materials for nonreciprocal devices. High mobility semiconductors act like solid-state plasmas, and when exposed to a DC magnetic bias, can be modeled as (gyroelectric) anisotropic material, or magnetoplasma. This gives rise to a permittivity tensor, which might be thought of as the dual to magnetized ferrites. Doped semiconductors like InSb and GaAs are usually employed for this purpose. They can work at higher frequencies; up to THz. Also, the offered bandwidth is huge and well exceeds the available bandwidth of most microwave guiding structures. Being a semiconductor, this material is fully compatible with integration, making it an attractive choice for MMICs applications.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133951512","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 : 2009-06-01DOI: 10.1109/APS.2009.5172383
Shishan Qi, Wen Wu, Z. Shen
This paper has demonstrated how two arbitrary closely-spaced antennas can be decoupled with an additional orthogonal eigenmode feeding network. The design approach and measured results of the proposed decoupled antenna array have been provided. Isolation between the input ports is better than −25dB at 900MHz. It has been demonstrated that two arbitrary antennas can be easily decoupled by an additional orthogonal eigenmode feeding network.
{"title":"Port decoupling of two arbitrary antennas in close proximity through an Eigenmode feed network","authors":"Shishan Qi, Wen Wu, Z. Shen","doi":"10.1109/APS.2009.5172383","DOIUrl":"https://doi.org/10.1109/APS.2009.5172383","url":null,"abstract":"This paper has demonstrated how two arbitrary closely-spaced antennas can be decoupled with an additional orthogonal eigenmode feeding network. The design approach and measured results of the proposed decoupled antenna array have been provided. Isolation between the input ports is better than −25dB at 900MHz. It has been demonstrated that two arbitrary antennas can be easily decoupled by an additional orthogonal eigenmode feeding network.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134283399","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 : 2009-06-01DOI: 10.1109/APS.2009.5171757
X. Duan, M. Moghaddam
A solution to scattering from two-dimensional (2D) surfaces with arbitrary roughness based on the extended boundary condition method (EBCM) is presented. The bistatic scattering cross section (SCS) is obtained from the superposition of the upgoing Floquet modes. This method places no limitation on the roughness scale of the surface, and produces both co-pol and cross-pol components of fields and scattering cross sections. The method is validated for the small roughness regime by comparing the simulation results with an existing solution using the small perturbation method (SPM) for the co-pol components. Comparison of results shows very good agreement between these two methods in the validity domain of SPM. Further validations for rougher surfaces and for cross-pol components are currently under-way.
{"title":"Full wave vector electromagnetic scattering from two-dimensional arbitrary random rough surfaces","authors":"X. Duan, M. Moghaddam","doi":"10.1109/APS.2009.5171757","DOIUrl":"https://doi.org/10.1109/APS.2009.5171757","url":null,"abstract":"A solution to scattering from two-dimensional (2D) surfaces with arbitrary roughness based on the extended boundary condition method (EBCM) is presented. The bistatic scattering cross section (SCS) is obtained from the superposition of the upgoing Floquet modes. This method places no limitation on the roughness scale of the surface, and produces both co-pol and cross-pol components of fields and scattering cross sections. The method is validated for the small roughness regime by comparing the simulation results with an existing solution using the small perturbation method (SPM) for the co-pol components. Comparison of results shows very good agreement between these two methods in the validity domain of SPM. Further validations for rougher surfaces and for cross-pol components are currently under-way.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134314293","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 : 2009-06-01DOI: 10.1109/APS.2009.5171712
Yu-Jia Li, Jianming Jin
The FETI-DPEM method has been applied to the full-wave analysis of mutual coupling between antenna arrays. The full-wave simulation has been accelerated through parallel computation implemented on a distributed-memory system using MPI. Examples have been presented and the array mutual coupling at the presence of a platform has been characterized using the received power at one array due to the scanning operation of the other array.
{"title":"Full-wave analysis of antenna-array mutual coupling using the FETI-DPEM algorithm","authors":"Yu-Jia Li, Jianming Jin","doi":"10.1109/APS.2009.5171712","DOIUrl":"https://doi.org/10.1109/APS.2009.5171712","url":null,"abstract":"The FETI-DPEM method has been applied to the full-wave analysis of mutual coupling between antenna arrays. The full-wave simulation has been accelerated through parallel computation implemented on a distributed-memory system using MPI. Examples have been presented and the array mutual coupling at the presence of a platform has been characterized using the received power at one array due to the scanning operation of the other array.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131786436","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}
A self-shielding open slot antenna has been proposed, constructed and tested. From the simulation and measured results, it is found that the performance of the proposed antenna is almost not affected by the surrounding metal components. Thus the proposed antenna can easily be integrated with different commercial products as an internal antenna. Utilizing this property with proper arrangement of antenna position, the isolation between two self-shielding open slot antennas with a separation 0.24 wavelength is better than 24 dB over the operation bandwidth. Therefore the proposed self-shielding open slot antenna can be considered as a good candidate for MIMO applications.
{"title":"A self-shielding open slot antenna for WiMAX MIMO application","authors":"Ta-Chun Pu, Chunbang Wu, Hung-Hsuan Lin, Jui-Hung Chen","doi":"10.1109/APS.2009.5171817","DOIUrl":"https://doi.org/10.1109/APS.2009.5171817","url":null,"abstract":"A self-shielding open slot antenna has been proposed, constructed and tested. From the simulation and measured results, it is found that the performance of the proposed antenna is almost not affected by the surrounding metal components. Thus the proposed antenna can easily be integrated with different commercial products as an internal antenna. Utilizing this property with proper arrangement of antenna position, the isolation between two self-shielding open slot antennas with a separation 0.24 wavelength is better than 24 dB over the operation bandwidth. Therefore the proposed self-shielding open slot antenna can be considered as a good candidate for MIMO applications.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132599796","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 : 2009-06-01DOI: 10.1109/APS.2009.5172078
Caicheng Lu, P. Yla-Oijala, M. Taskinen, J. Sarvas
This paper presented two formulations of the electric field volume integral equation, and discussed the use of two different types of volume basis functions in the representation of the volume current. In conclusion, for the two types of volume basis functions, the solution accuracies are of the same order as long as the numbers of basis functions are comparable. The numbers of iterations of the C-type basis function are generally smaller than that of the D-type basis functions if the initial is a zero vector. For multiple incident angles, the D-type basis case needs slightly less number of iterations when the initial solution is predicted from the solution of the previous incident angle.
{"title":"Comparison of two volume integral equation formulations for solving electromagnetic scattering by inhomogeneous dielectric objects","authors":"Caicheng Lu, P. Yla-Oijala, M. Taskinen, J. Sarvas","doi":"10.1109/APS.2009.5172078","DOIUrl":"https://doi.org/10.1109/APS.2009.5172078","url":null,"abstract":"This paper presented two formulations of the electric field volume integral equation, and discussed the use of two different types of volume basis functions in the representation of the volume current. In conclusion, for the two types of volume basis functions, the solution accuracies are of the same order as long as the numbers of basis functions are comparable. The numbers of iterations of the C-type basis function are generally smaller than that of the D-type basis functions if the initial is a zero vector. For multiple incident angles, the D-type basis case needs slightly less number of iterations when the initial solution is predicted from the solution of the previous incident angle.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128954980","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 : 2009-06-01DOI: 10.1109/APS.2009.5171659
A. Sani, A. Alomainy, Y. Hao
The radiation characteristics of a bladder implanted wireless source have been numerically investigated and analysed. Simulations were performed with the Finite-Differences Time-Domain (FDTD) technique at the Medical Implanted Communication Systems (MICS) frequency band of 402 MHz and at the unlicensed frequency band of 868 MHz. Three different inhomogeneous digital phantoms (two male and one female) were considered for studying the effect of various body shapes and compositions on the radiation performance of wireless implants. The numerical analysis indicated that the radiation characteristics of wireless implants are subject-specific. In particular, the female body, due to the smaller size, and the reduced amount of highly lossy tissues, demonstrated higher efficiency.
{"title":"The effect of various human body tissue models on radiowave propagation from a bladder implanted wireless source","authors":"A. Sani, A. Alomainy, Y. Hao","doi":"10.1109/APS.2009.5171659","DOIUrl":"https://doi.org/10.1109/APS.2009.5171659","url":null,"abstract":"The radiation characteristics of a bladder implanted wireless source have been numerically investigated and analysed. Simulations were performed with the Finite-Differences Time-Domain (FDTD) technique at the Medical Implanted Communication Systems (MICS) frequency band of 402 MHz and at the unlicensed frequency band of 868 MHz. Three different inhomogeneous digital phantoms (two male and one female) were considered for studying the effect of various body shapes and compositions on the radiation performance of wireless implants. The numerical analysis indicated that the radiation characteristics of wireless implants are subject-specific. In particular, the female body, due to the smaller size, and the reduced amount of highly lossy tissues, demonstrated higher efficiency.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"18 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132792605","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 : 2009-06-01DOI: 10.1109/APS.2009.5171993
Ying Suo, X. Gao, J. Qiu
In order to measure signal which has 0.5–20GHz bandwidth, TEM horn antenna is a good choose for the high requirement both in low and high frequency. In this paper, a planar TEM horn antenna is presented in the paper which is similar to Vivaldi antenna, but has better quality in low frequency and a 0.5–25GHz bandwidth. The model is established with CST@ software and the parameters are optimized to decrease its size. In the end a better result is obtained.
{"title":"Design of miniature planar ultra-wideband TEM horn antenna","authors":"Ying Suo, X. Gao, J. Qiu","doi":"10.1109/APS.2009.5171993","DOIUrl":"https://doi.org/10.1109/APS.2009.5171993","url":null,"abstract":"In order to measure signal which has 0.5–20GHz bandwidth, TEM horn antenna is a good choose for the high requirement both in low and high frequency. In this paper, a planar TEM horn antenna is presented in the paper which is similar to Vivaldi antenna, but has better quality in low frequency and a 0.5–25GHz bandwidth. The model is established with CST@ software and the parameters are optimized to decrease its size. In the end a better result is obtained.","PeriodicalId":213759,"journal":{"name":"2009 IEEE Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130894744","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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