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	1. X-Band Polarization-Independent and Angle-Insensitive Metamaterial Absorber Using 90-Degree-Rotated Split-Ring Resonators
	FENG Jiaqi,HU Weidong,ZHANG Qingle,ZONG Hua,HUANG Hui,WU Yuming,XU Zhan,JIN Yuting,LV Xin,SI Li-Ming
	Electrics, Communication and Autocontrol Technology 09 March 2015
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	Abstract:In this paper,We present the design, simulation, and measurement of a polarization-independent and angle-insensitive metamaterial absorber (MA) in X-band. Since the unit cell of the MA consists of four subwavelength split-ring resonators with 4-fold symmetric rotation, the MA is insensitive to the variation of both polarization and incident angle of the planar electromagnetic wave. The electromagnetic performances of the MA are studied by full-wave simulations based on finite-element method and the Naval Research Laboratory arch experimental measurements. The electric field distributions are numerically investigated, which confirm the polarization-insensitive property of the MA, as expected from the symmetric nature of the structure. When the incident angles varies from 0 to 45 degrees, the MA remains full width at half maximum of 0.4 GHz (0.5 GHz) with peak absorptions of 99.9 % (95.2%) at 10.27 GHz (10.3 GHz) by simulations (measurements)
	TO cite this article:FENG Jiaqi,HU Weidong,ZHANG Qingle, et al. X-Band Polarization-Independent and Angle-Insensitive Metamaterial Absorber Using 90-Degree-Rotated Split-Ring Resonators[OL].[ 9 March 2015] http://en.paper.edu.cn/en_releasepaper/content/4633655


	2. Electromagnetic Analysis for Tunable Miniaturized Patch Antennas with Self-Biased Magnetic Film
	Gui Zhu Yin, Chun Xia Yang,Jian Zhang,Jie Zhang,Mei Song Tong
	Electrics, Communication and Autocontrol Technology 16 December 2014
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	Abstract:Accurate electromagnetic (EM) analysis is carried out for a tunable miniaturized patch antenna loaded with self-biased magnetic film. The patch antenna includes a lossy dielectric substrate and a layered ferrite-thin-film superstrate above microstrip. The loaded magnetic thin film is self-biased and is essential to enhance the property of the antenna. The entire structure is of multiscale and multimaterial feature and the widely-used surface integral equations (SIEs) may not be able to result in well-conditioned impedance matrix if analyzed by integral equation approach. We use volume-surface integral equations (VSIEs) to formulate the problem and the VSIEs are solved by the method of moments (MoM) with a different implementation scheme. The scheme keeps the dyadic Green's function in its original form without moving the del operator onto the basis function and testing function so that nonconforming meshes at material interfaces can be allowed. Numerical examples are presented to illustrate the approach and good results can be observed.
	TO cite this article:Gui Zhu Yin, Chun Xia Yang,Jian Zhang, et al. Electromagnetic Analysis for Tunable Miniaturized Patch Antennas with Self-Biased Magnetic Film[OL].[16 December 2014] http://en.paper.edu.cn/en_releasepaper/content/4623451

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	3. Monopole Antenna based on the Modified Ground Plane for WLAN Application
	HONG Tao
	Electrics, Communication and Autocontrol Technology 08 October 2014
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	Abstract:A monopole antenna with modified ground plane is presented for 2.4GHz and 5GHz WLAN applications in this letter. A trapezoid patch and a quasi-fractal slotted patch are printed on two FR-4 dielectric substrates as the radiator and the ground plane of the antenna, respectively. The element of the quasi-fractal slot structure is a circular ring with 4 branches. The radiation characteristics are simulated and experimentally verified, and the results show that the proposed antenna has good radiation performance.
	TO cite this article:HONG Tao. Monopole Antenna based on the Modified Ground Plane for WLAN Application[OL].[ 8 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4612134


	4. An Interdigitated Coupler with Defect Ground Structure
	Feng Xu,Zhaoxiang Wu
	Electrics, Communication and Autocontrol Technology 08 May 2014
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	Abstract:In this paper, an interdigitated coupler with a defect ground structure in the coupling position is presented. Compared to the conventional interdigitated coupler, the proposed coupler loosens restrictions of the coupling-line width and space between the coupling lines. As a result, the requirement of fabricating accuracy for the new coupler is lowered greatly. In addition, with the introduction of suitable defect ground structure, the bandwidth of the coupler can be improved substantially. The designed 3-dB coupler has the coupling strength of -3dB±0.8dB within the passband of 8~19GHz, while both of the isolation response and the return loss are lower than -20dB.
	TO cite this article:Feng Xu,Zhaoxiang Wu. An Interdigitated Coupler with Defect Ground Structure[OL].[ 8 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4596549


	5. An Hybrid Integrated Transition of CPW to SINRD Guide Based on PCB
	Feng Xu,Fan Li
	Electrics, Communication and Autocontrol Technology 08 May 2014
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	Abstract:Substrate integrated nonradiative dielectric (SINRD) waveguide fabricated directly on printed circuit board (PCB) or metalized dielectric layer, with its excellent performances of simplifying fabrication process and minimizing mechanical errors, is vitally essential at the microwave and millimeter-wave frequencies. In this paper, both double-layer and triple-layer transitions of coplanar waveguides (CPW) to the SINRD waveguides based on the former technique are presented, providing effective interconnects for compactly and flexibly integrating the planar-CPW-based devices with the SINRD waveguide circuits. It is found that simulated results are in good agreements with the measured results, which proves the promising future of the SINRD waveguides based on PCBs in the area of mm-wave hybrid integrated systems.
	TO cite this article:Feng Xu,Fan Li. An Hybrid Integrated Transition of CPW to SINRD Guide Based on PCB[OL].[ 8 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4594549


	6. Electromagnetic Band Gap and Artificial Magnetic Conductor and Their Application to the Patch Antenna
	Feng Xu,Hongyuan Zhou
	Electrics, Communication and Autocontrol Technology 06 May 2014
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	Abstract:In this letter, the microstrip antenna with square patch array on the front surface and two-dimensional photonic band gap (PBG) on the ground has been proposed. The ground etching structure can suppress the resonance of the harmonic frequencies effectively of the antenna while the square patch array can increase the gain comparing with the normal microstrip patch antenna. The simulation and measurement results of this novel antenna are illustrated. The comparison of radiation patterns between this novel antenna, the microstrip antenna only with ground etching structure and the normal microstrip antenna is also presented.
	TO cite this article:Feng Xu,Hongyuan Zhou. Electromagnetic Band Gap and Artificial Magnetic Conductor and Their Application to the Patch Antenna[OL].[ 6 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4595029


	7. Domain Decomposition FDTD Algorithm for the Analysis of Electromagnetic Fields and Microwave Structures
	Feng Xu,Ke Wu
	Electrics, Communication and Autocontrol Technology 06 May 2014
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	Abstract:In this paper, a universal and efficient algorithm of domain decomposition finite difference time domain (DD-FDTD) is presented for the analysis of electromagnetic fields and microwave structures. The proposed algorithm can not only be used to analyze very complicated microwave structures but also be used to analyze sparse multi-domain electromagnetic fields. The algorithm can greatly increase the accuracy of numerical simulations and save computation time and memory space. Moreover, by combining the DD-FDTD method with a numerical thru-line (TL) calibration technique, an efficient hybrid algorithm is developed for the accurate parameter extraction of microwave circuits and structures, such as substrate integrated circuits (SICs). The SICs that are studied in this work are based on substrate integrated waveguides (SIW) which are useful for the design of millimeter-wave planar circuits such as filters, resonators and antennas.
	TO cite this article:Feng Xu,Ke Wu. Domain Decomposition FDTD Algorithm for the Analysis of Electromagnetic Fields and Microwave Structures[OL].[ 6 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4594952


	8. A Compact Bandpass Filter Based on One-Third Equilateral Triangular Resonator of Substrate Integrated Waveguide
	Feng Xu,Chaoyi Zheng
	Electrics, Communication and Autocontrol Technology 06 May 2014
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	Abstract:In this paper, a one-third equilateral triangular resonator with two electric walls and two magnetic walls is proposed for the first time. The frequency of the main mode and the electric field distribution of the one-third equilateral triangular resonator are discussed and presented. The structure is realized by taking out one-third of an equilateral triangular resonator of substrate integrated waveguide (SIW) version and therefore, is called one-third-mode substrate integrated resonator (OTMSIR). Based on this resonator, OTMSIR filters composed of three OTMSIR cavities and six OTMSIR cavities are designed and simulated, respectively. Finally, the defected ground structure (DGS) is used to improve the performance of OTMSIR filters outside the passband. A 4.4-GHz bandpass filter with six OTMSIR cavities is fabricated and tested. The measured results agree well with the simulated ones.
	TO cite this article:Feng Xu,Chaoyi Zheng. A Compact Bandpass Filter Based on One-Third Equilateral Triangular Resonator of Substrate Integrated Waveguide[OL].[ 6 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4594875


	9. A Six-port Network Based On CPW Interdigitated Structure
	Feng Xu,Zhaoxiang Wu
	Electrics, Communication and Autocontrol Technology 28 April 2014
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	Abstract:A six-port network based on coplanar waveguide (CPW) interdigitated structures is proposed and presented. Among these six ports, two ports are isolated ports and two are coupled ports. The left two ports contain an input one and a direct one. In this paper, the network is designed with equally dividing the power between the two coupled ports and the direct port, namely about 4.8 dB. The return loss is better than 22 dB and the isolation is better than 21 dB from 2 to 6 GHz according to the simulated and measured results. Good agreement between simulated and measured results is found for the proposed six-port network. To the best knowledge of the authors, this is the first time to put forward six-port interdigitated coupled network with all ports in the same plane.
	TO cite this article:Feng Xu,Zhaoxiang Wu. A Six-port Network Based On CPW Interdigitated Structure[OL].[28 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4594669


	10. Optmization of SIW Band-pass Filter with the Wide and Sharp Stop-band Using Space Mapping
	XU Juan,LI Zhaolong,CHEN Rushan
	Electrics, Communication and Autocontrol Technology 21 April 2014
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	Abstract:This work presents a wide and sharp stopband substrate integrated waveguide bandpass filter. Non-physical cross-coupling provided by higher modes in the SIW cavities is used to generate the finite transmission zeros for improved stopband performance. The design of SIW filters requires full wave electromagnetic simulations and extensive optimization. If a full wave solver is used for optimization, the design process is very time consuming. Using space mapping method, the optimization goal is to shorten the design cycle by using a fast but less accurate simulator (coarse model) to gain the information about the optimal parameters setting of the expensive but accurate simulator (fine model). To obtain the optimal design for the fine model, the space mapping technique compares the results of both models and modifies the parameters of fine model gradually. If the misalignment between the fine and coarse models is not significant, the algorithm automatically reduces the differences until the misalignment is reduced to acceptable limits. A fourth-order filter with a passband of 12-12.5GHz is fabricated on a single layer Rogers RT/Duroid 5880 substrate. The return loss is bigger than 17.4 dB in the pass band and the insertion loss is more than 40dB in the stop band. The stopband is from 2 GHz to 11 GHz and 13.5 GHz to 17.3 GHz.?????
	TO cite this article:XU Juan,LI Zhaolong,CHEN Rushan. Optmization of SIW Band-pass Filter with the Wide and Sharp Stop-band Using Space Mapping[OL].[21 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4594281

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