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2008 International Conference on Microwave and Millimeter Wave Technology最新文献

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The design and implementation of double side printed patch antenna 双面印刷贴片天线的设计与实现
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540847
Zhicheng Wang, Hao Wang, M. Wei, Qingrong Li
{"title":"The design and implementation of double side printed patch antenna","authors":"Zhicheng Wang, Hao Wang, M. Wei, Qingrong Li","doi":"10.1109/ICMMT.2008.4540847","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540847","url":null,"abstract":"A modified double side printed patch antenna is proposed in this paper. Its impedance bandwidth can be expanded to sevenfold frequency multiplication which is from 2.8 GHz to 17 GHz through improving the construction of commonly bow-tie printed antenna. Simultaneously, the antenna gain has an average value of 10 dB in the whole band. In addition, the presented antenna has good end fire characteristic that makes it suitable for phased array systems.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123658787","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}
引用次数: 2
Analysis of waveguide discontinuities with fem based on weak form of Helmholtz equations 基于弱形式亥姆霍兹方程的波导不连续有限元分析
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540484
Z.X. Wang, W. Dou, G.H. Li
{"title":"Analysis of waveguide discontinuities with fem based on weak form of Helmholtz equations","authors":"Z.X. Wang, W. Dou, G.H. Li","doi":"10.1109/ICMMT.2008.4540484","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540484","url":null,"abstract":"A flexible numerical analysis method based on the weak form of the Helmholtz equations is introduced to analyze waveguide discontinuities problems in this paper. Several waveguide discontinuities of three dimensions and two dimensions such as dielectric loaded waveguide; waveguide T- junction and power divider are analyzed. Calculation results are presented and agree well with the experimental results and numerical results from other method in literatures.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121302377","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}
引用次数: 1
A New implementation of the uniaxial perfectly matched layer 单轴完美匹配层的新实现
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540511
Jianxiong Li, Chunjiao Miao
{"title":"A New implementation of the uniaxial perfectly matched layer","authors":"Jianxiong Li, Chunjiao Miao","doi":"10.1109/ICMMT.2008.4540511","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540511","url":null,"abstract":"A novel implementation of the uniaxial perfectly matched layer (UPML) absorbing boundary condition is proposed for truncating the finite-difference time-domain (FDTD) lattices. In the proposed formulations, the diagonal tensor of the UPML is separated from the relative permittivity epsivr(omega) and permeability mur{omega) of the FDTD computational domains and then its inverse is discretized along with the curl of the electric field E or the magnetic field H. In consequence, in the FDTD programme, the UPML is implemented independently from the simulation of the FDTD computational domains. Two numerical tests have been provided to validate the proposed algorithm.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114524216","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}
引用次数: 1
Simulation of scattering from dielectric random rough surfaces using SMCG method with curvilinear RWG basis functions 基于曲线RWG基函数的SMCG方法模拟介电随机粗糙表面散射
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540447
S. Huang, M. Xia
{"title":"Simulation of scattering from dielectric random rough surfaces using SMCG method with curvilinear RWG basis functions","authors":"S. Huang, M. Xia","doi":"10.1109/ICMMT.2008.4540447","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540447","url":null,"abstract":"An improved sparse-matrix canonical-grid (SMCG) method for simulation of scattering by dielectric random rough surface is developed. Curvilinear triangular patches are employed to model the rough surfaces and curvilinear Rao-Wilton-Glisson (RWG) basis functions are adopted to expand the surface equivalent currents, replacing the planar triangular patches and planar RWG basis functions used in the previous SMCG approaches. This improvement generates comparable accurate results with less than half number of unknowns. Numerical examples for both dielectric Gaussian and ocean-like rough surfaces are provided to confirm the correctness and efficiency.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121471025","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}
引用次数: 0
Compact ultra-wide bandpass filter with good out-of-band performance 紧凑的超宽带通滤波器，带外性能好
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540381
Zhong Li, Guangming Wang, Chen-xin Zhang, Ge-nong Long
{"title":"Compact ultra-wide bandpass filter with good out-of-band performance","authors":"Zhong Li, Guangming Wang, Chen-xin Zhang, Ge-nong Long","doi":"10.1109/ICMMT.2008.4540381","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540381","url":null,"abstract":"An ultra-wideband (UWB) microstrip Alter with good out-of-band performance is designed and demonstrated. The filter design is based on a circuit model for an optimum short-circuited stub transmission-line filter whose unit elements or connecting lines are non-redundant. Substituting the connecting lines by the lowpass filter using stepped impedance hairpin resonator (SIHR), the undesired spurious bands can be efficiently suppressed, and the designed filter length is reduced. According to the different requirements, the broadband bandpass and lowpass filter can be independently designed and modified, which makes the filter more convenient and easily implemented.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"120 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113999805","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}
引用次数: 2
Novel miniaturized Wilkinson power divider for 3G mobile receivers 用于3G移动接收机的新型小型化威尔金森功率分配器
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.2528/PIERL08012603
S. Shamsinejad, M. Soleimani, N. Komjani
{"title":"Novel miniaturized Wilkinson power divider for 3G mobile receivers","authors":"S. Shamsinejad, M. Soleimani, N. Komjani","doi":"10.2528/PIERL08012603","DOIUrl":"https://doi.org/10.2528/PIERL08012603","url":null,"abstract":"This paper reports the miniaturization of a microstrip Wilkinson power divider by substituting the quarter wave transmission lines employed in conventional Wilkinson power dividers with its equal circuit consisting of two stubs and an inductor. Reduction of the device length to 53% its size are reported here. This Wilkinson power divider is designed at 2140 MHz for using in 3G-UMTS receivers. Furthermore, the second harmonic suppression is realized in this configuration and its frequency response is similar to low pass filters because of inductor. Also, the dividing procedure, the reflection coefficient and the isolation is as good as conventional Wilkinsons.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127878339","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}
引用次数: 42
High-efficiency doherty amplifier using GaN HEMT class-F cells for WCDMA applications 用于WCDMA应用的GaN HEMT f类电池的高效多赫蒂放大器
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540359
Yong‐Sub Lee, Mun-Woo, Y. Jeong
{"title":"High-efficiency doherty amplifier using GaN HEMT class-F cells for WCDMA applications","authors":"Yong‐Sub Lee, Mun-Woo, Y. Jeong","doi":"10.1109/ICMMT.2008.4540359","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540359","url":null,"abstract":"This paper presents a high-efficiency GaN high electron mobility transistor (HEMT) class-F Doherty amplifier (CFDA) for wide-band code division multiple access (WCDMA) applications. The class-F power amplifiers (PAs) with significant harmonic suppression are used as the carrier and peaking cells. For validations, the class-F PA is designed and implemented with 25-W GaN HEMT at 2.14 GHz. From the measured results for a single tone, the implemented class-F PA shows the peak power-added efficiency (PAE) and drain efficiency of 72.2% and 75.8% with a gain of 13.2 dB at an output power of 43.2 dBm by suppressing harmonic power levels below -55 dBc. For the proposed CFDA, the PAE and drain efficiency of 56.3% and 60.1% is achieved at 39.5 dBm (6-dB back-off power from Psat) for a single tone. For a one-carrier WCDMA signal, the CFDA shows the PAE of 44.9% with an adjacent channel leakage ratio (ACLR) of -22.1 dBc (plusmn2.5 MHz offset) at 36.5 dBm, while an ACLR of -35.4 dBc with the PAE of 39.7% is achieved for the CEDA after linearity optimization.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"T156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125656940","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}
引用次数: 8
A fast solution to the VSIE for EM scattering by using the P-FFT with floating stencils 基于浮动模板的P-FFT快速求解电磁散射VSIE
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540515
Zhong-kuan Chen, S. Chai, Hu Yang, J. Mao
{"title":"A fast solution to the VSIE for EM scattering by using the P-FFT with floating stencils","authors":"Zhong-kuan Chen, S. Chai, Hu Yang, J. Mao","doi":"10.1109/ICMMT.2008.4540515","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540515","url":null,"abstract":"A fast solution to the volume-surface integral equation (VSIE) for scattering from 3-D composite conducting- dielectric objects is implemented by using the precorrected-FFT (P-FFT) method with improved stencil topology. The composite conducting-dielectric objects are discretized into triangle elements for the metallic region and tetrahedron elements for the material region, respectively, and then the method of moments (MoM) and the precorrected-FFT method are used to solve the VSIE for EM Scattering. When the P-FFT method is being employed, the projection and interpolation stencils are based on an improved stencil topology named \"floating stencils\", in which each grid corresponds to a stencil center and each basis function is linked to the stencil with its center nearest to the basis function. Numerical result shows that the implemented solver can solve VSIE for EM scattering from composite conducting-dielectric objects efficiently, and that the floating stencil topology can significantly reduce near-zone interactions to be pre-corrected, as well as memory and CPU time.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125725462","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}
引用次数: 1
Design of a compact UWB Wilkinson power divider 紧凑型超宽带威尔金森功率分配器的设计
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540387
Lin Yang, Q. Chu
{"title":"Design of a compact UWB Wilkinson power divider","authors":"Lin Yang, Q. Chu","doi":"10.1109/ICMMT.2008.4540387","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540387","url":null,"abstract":"In this paper, a Wilkinson power divider operating over an ultra wide frequency band (3.1 to 10.6 GHz) is presented. The proposed power divider consists of two branches of impedance transformer, each of which consists of two sections of transmission line with different characteristic impedance and different length. And a resistor is set between the two sections. The simulated and experimental results of the developed divider are presented and show good agreement.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122272525","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}
引用次数: 21
Design of a 4 GHz quadrature LC -VCO with transformer coupling 带变压器耦合的4ghz正交LC -VCO设计
2008 International Conference on Microwave and Millimeter Wave Technology Pub Date : 2008-04-21 DOI: 10.1109/ICMMT.2008.4540536
Wu Xiushan, Wang Zhigong, Li Zhiqun, Li Qing
{"title":"Design of a 4 GHz quadrature LC -VCO with transformer coupling","authors":"Wu Xiushan, Wang Zhigong, Li Zhiqun, Li Qing","doi":"10.1109/ICMMT.2008.4540536","DOIUrl":"https://doi.org/10.1109/ICMMT.2008.4540536","url":null,"abstract":"A 4 GHz quadrature voltage-controlled oscillator (QVCO) topology is proposed where a planar spiral transformer is used as coupling terminals. Two identical LC oscillators are cross-coupled by the transformer to generate the quadrature outputs. The transformer also serves as filtering network for the oscillators to improve the phase noise performance. The quadrature oscillator based on the proposed topology with additional design ideas has been implemented in a 0.18 um mixed-signal 1P6M CMOS technology for 4 GHz-band operation. The simulation gave a phase noise of -122 dBc/Hz at 1 MHz offset with an output power of 1 dBm, while dissipating 7.8 mA under a 1.8 V supply.","PeriodicalId":315133,"journal":{"name":"2008 International Conference on Microwave and Millimeter Wave Technology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115817157","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}
引用次数: 2
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