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	1. Supercapacitors based sheet-structure polyprrole/grpahene composites
	Zhu Jianbo,Xu Youlong,Wang Jie
	Electrics, Communication and Autocontrol Technology 05 December 2015
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	Abstract:Nano-sheet polypyrrole/reduced graphene oxide (PPy/RGO) composites were prepared by in situ polymerization of the pyrrole monomer in the RGO uniform suspension. A homogeneous dispersion of individual graphene sheets coated by the PPy matrix was achieved. PPy and RGO formed a nano-sheets structure composite. Such nano-sheeets structure and the observed high electrical conductivities afforded high specific capacitance, good rate performance and cyclic stability. A high specific capacitance of 255.7 F g-1 was achieved for PPy/RGO-10. Furthermore, The PPy/RGO-10 electrodes have good cycle stability and show less than 8.5% specific capacitance decay at a charge/discharge current density of 2 A g-1 within an electrochemical window of 0.9 V after 2000 cycles.
	TO cite this article:Zhu Jianbo,Xu Youlong,Wang Jie. Supercapacitors based sheet-structure polyprrole/grpahene composites[OL].[ 5 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4669401


	2. A Wide-angle Broadband Waveplate Based on Field Transformation Approach
	Junming Zhao,Yang Hao,Yijun Feng
	Electrics, Communication and Autocontrol Technology 30 December 2014
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	Abstract:We present here a wide-angle broadband waveplate based on a field transformation (FT) method. By adjusting the thickness of such waveplate, we obtain both half-wave and quarter-wave plates which achieve polarization conversions between TE (transverse electric) and TM (transverse magnetic), LCP (left-handed circular polarization) and RCP (right-handed circular polarization), linear and circular polarizations separately for both transmission and reflection cases. Such waveplates can be realized through sub-wavelength dielectric gratings based on effective media theory, whose performances have been verified through numerical and full-wave simulations with measurements carried out in microwave regime. In principle the proposed prototype is applicable from radio to optical frequencies.
	TO cite this article:Junming Zhao,Yang Hao,Yijun Feng. A Wide-angle Broadband Waveplate Based on Field Transformation Approach[OL].[30 December 2014] http://en.paper.edu.cn/en_releasepaper/content/4625557

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	3. Simple Triple Band-Notched UWB Antenna with Independently Tunable Notch Bands
	WANG Xudong,TIAN Huiping
	Electrics, Communication and Autocontrol Technology 26 November 2014
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	Abstract:To prevent potential interferences from existing wireless systems including WiMAX and WLAN service, a triple band-notched ultra-wideband (UWB) antenna is presented. Firstly, the band-notches in WiMAX and WLAN bands are realized by inserting a quarter-wavelength open-ended slot in the radiating patch and adding half-wavelength C-shaped strips near the feed line respectively. Then a triple band-notched UWB antenna is presented by embedding a slot in the patch and adding strips near the feed line simultaneously. Due to weak coupling between band-rejected elements, we can finely modulate any notch band by altering the relevant element without influence on others. The simulation and measurement results show that the proposed triple band-notched UWB antenna achieves a wide bandwidth with band-rejected filtering properties in the WiMAX and WLAN bands. Analysis of the approach is illustrated to verify its advantage of notch-frequency independent tunability.
	TO cite this article:WANG Xudong,TIAN Huiping. Simple Triple Band-Notched UWB Antenna with Independently Tunable Notch Bands[OL].[26 November 2014] http://en.paper.edu.cn/en_releasepaper/content/4618509


	4. 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


	5. 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


	6. One-step leapfrog ADI-FDTD method for simulating electromagnetic wave propagation in general dispersive media
	WANG Xianghua,YIN Wenyan,CHEN Zhizhang
	Electrics, Communication and Autocontrol Technology 31 December 2013
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	Abstract:The one-step leapfrog alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is reformulated for simulating general electrically dispersive media. It models material dispersive properties with equivalent polarization currents. These currents are then solved with the auxiliary differential equation (ADE) and then incorporated into the one-step leapfrog ADI-FDTD method. The final equations are presented in the form similar to that of the conventional FDTD method but with second-order perturbation. The adapted method is then applied to characterize (a) electromagnetic wave propagation in a rectangular waveguide loaded with a magnetized plasma slab, (b) transmission coefficient of a plane wave normally incident on a monolayer graphene sheet biased by a magnetostatic field, and (c) surface plasmon polaritons (SPPs) propagation along a monolayer graphene sheet biased by an electrostatic field. The numerical results verify the stability, accuracy and computational efficiency of the proposed one-step leapfrog ADI-FDTD algorithm in comparison with analytical results and the results obtained with the other methods.
	TO cite this article:WANG Xianghua,YIN Wenyan,CHEN Zhizhang. One-step leapfrog ADI-FDTD method for simulating electromagnetic wave propagation in general dispersive media[OL].[31 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4577464


	7. Infrared light transport properties of nanostructure vanadium dioxide thin films across metal-insulator
	LIANG Jiran,LIU Xing,HU Ming,LI Na,WU Maijun
	Electrics, Communication and Autocontrol Technology 04 December 2013
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	Abstract:A nano-structured Vanadium dioxide thin film has been fabricated through reactive magnetron sputtering followed thermal annealing. X-ray diffraction and scanning electron microscope were used to analysis the crystalline structure and morphology of annealed thin film, respectively. The infrared light transport properties of nano-structured vanadium dioxide thin film were characterized by transmittance determined by Fourier transform infrared spectrometry during phase transition. The results show that the onset temperature of transition increases with wavelength. The maximum transmittance shifts to longer wavelength as the phase changed from insulating phase to metallic phase. The transmittance at shorter wavelength exhibits an increasing at the beginning of metal-insulator transition. The infrared light transport properties are related to the interaction of infrared light and vanadium dioxide nano-grain during metal-insulator transition.
	TO cite this article:LIANG Jiran,LIU Xing,HU Ming, et al. Infrared light transport properties of nanostructure vanadium dioxide thin films across metal-insulator[OL].[ 4 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4572629


	8. A Wideband Frequency Selective Surfaces based on Hybrid Boundary Cavity
	WEI Xingchang,DAI Gaole,Jing Wei
	Electrics, Communication and Autocontrol Technology 16 July 2013
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	Abstract:In this paper, a novel frequency selective surface (FSS) based on hybrid boundary cavity is proposed, which shows a high frequency selectivity and a smaller cell size. The fundamental cell of the proposed frequency selective surface is a hybrid boundary cavity which consists of four common metallic vias serving as the perfect electric boundary, as well as etched slots on top and bottom surfaces serving as the perfect magnetic boundary. In order to achieve a wider bandwidth and at the same time guarantee the flatness of the passband, we further improve the fundamental cell. Two structures of the proposed FSS were fabricated for the validation, and the measurement results exhibit good agreement with the simulation results.
	TO cite this article:WEI Xingchang,DAI Gaole,Jing Wei. A Wideband Frequency Selective Surfaces based on Hybrid Boundary Cavity[OL].[16 July 2013] http://en.paper.edu.cn/en_releasepaper/content/4551683


	9. A High Resolution X/Ku Band Frequency Synthesizer
	Guo Fei,Xu Jinping
	Electrics, Communication and Autocontrol Technology 21 February 2013
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	Abstract:This paper presents a high resolution X/Ku band frequency synthesizer based on a direct digital synthesizer (DDS) driven phase locked loop (PLL). The DDS, adopted as the reference of the PLL, has a frequency step of 1Hz and a typical phase noise of -140dBc/Hz at the offset of 10KHz. Its fine frequency step enables the synthesizer to have a high resolution at X/Ku band, while the phase locked loop combined with a mixer at half frequency of output signal realizes the performance of low phase noise. A prototype of the X/Ku band frequency synthesizer is developed. Measured results shows that it has an output frequency range of 11.1GHz to 12.9 GHz, a frequency resolution as fine as 10Hz and a typical phase noise of -100dBc/Hz at the offset of 10KHz.
	TO cite this article:Guo Fei,Xu Jinping. A High Resolution X/Ku Band Frequency Synthesizer[OL].[21 February 2013] http://en.paper.edu.cn/en_releasepaper/content/4520384


	10. Experimental Investigation on the Impact of Polarization Anisotropy on Channel Correlation Matrix
	YIN Xue-Feng, HE Yong-Yu, LING Cen, TIAN Li, ZHONG Zhi-Meng
	Electrics, Communication and Autocontrol Technology 25 January 2013
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	Abstract:In this contribution, theoretical studies and measurement campaigns are performed for investigating the anisotropic behavior of propagation channels with respect to (w.r.t.) the polarizations of transmitter (Tx) and receiver (Rx) antennas. Under the assumption that the channel impulse response is isotropic w.r.t. the Tx-Rx polarizations, an analytical expression is derived for the polarized-channel correlation matrix, which is further applied to illustrate that the rank of the matrix is tightly upper-bounded by $4$. In addition, channel measurements in typical indoor scenarios with $12$ Tx- and $2$ Rx-polarization orientations are conducted to collect channel impulse responses which are used to compute the eigenvalue spectra of the polarized-channel correlation matrices. The comparison between the theoretical deduction and the empirical results demonstrates that the propagation channels exhibit properties different from the deduction under the channel isotropy assumption, implying that the channel polarization anisotropy exists in the considered indoor environments.
	TO cite this article:YIN Xue-Feng, HE Yong-Yu, LING Cen, et al. Experimental Investigation on the Impact of Polarization Anisotropy on Channel Correlation Matrix[OL].[25 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4510824

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