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	1. 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


	2. 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


	3. Personal Authentication using Fingerprints of Radio Propagation for Wireless Intra-body Communications
	YIN Xuefeng,CHEN Jiajing,TIAN Meng,ZHANG Nan,ZHONG Zhimeng
	Electrics, Communication and Autocontrol Technology 13 January 2013
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	Abstract:In this contribution, the measurements of intra-body radio propagation channel are conducted at carrier frequencies 433 MHz, 900MHz and 2.4GHz with bandwidth of 2 MHz for different persons. The objective is to find unique propagation characteristics which can be used as fingerprints for personal authentication. The experiment results obtained demonstrate that the distribution of the fading coefficients of the intra-body channels, as well as the power frequency spectra exhibit distinguishable features which can be used to authenticate person's identity. The measurements also show that by using the reference fingerprints in terms of power frequency spectra, the correct identification probability can be maintained at the level above 75%. Furthermore, it is found that the validity of reference fingerprints is more sensitive to the clothes that a person wears than to the displacement of scatterers in the environments and minor changes of the person's posture.
	TO cite this article:YIN Xuefeng,CHEN Jiajing,TIAN Meng, et al. Personal Authentication using Fingerprints of Radio Propagation for Wireless Intra-body Communications[OL].[13 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4509103


	4. WSN Topological Research Used to Reduce Time Delay Based on Bellman-Ford
	Wang Mei,Ma Xiaoping
	Electrics, Communication and Autocontrol Technology 11 June 2011
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	Abstract:This paper introduced the importance of reducing data transmission delay in wireless sensor network real-time applications. Experimental proof and theoretical deduction showed that reducing nodes hops was the fundamental problems to reduce time delay. The problems of low delay and low energy consumption were solved through the WSN topology control model of reducing the delay which was built by the topology tree of minimum number hops based on Bellman-Ford. In addition, the maintenance of model was studied in order to improve the robustness. Simulation result showed that this design model compared to other agreement algorithm had superiority.
	TO cite this article:Wang Mei,Ma Xiaoping. WSN Topological Research Used to Reduce Time Delay Based on Bellman-Ford[OL].[11 June 2011] http://en.paper.edu.cn/en_releasepaper/content/4431001


	5. Electromagnetic Scattering of a Plane Wave
	Bin-Jie HU,Edward Kai-Ning YUNG
	Electrics, Communication and Autocontrol Technology 03 March 2005
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	Abstract:The scattering of a plane wave with a linear polarization by a conducting helix is presented. The analytical expresses of scattering field are obtained based on the boundary condition of a sheath helix model. At the conducting cylinder limit, our results coincide with the literatures. Effects of a pitch angle and electrical size of the helix on the resonant behavior are investigated.
	TO cite this article:Bin-Jie HU,Edward Kai-Ning YUNG. Electromagnetic Scattering of a Plane Wave[OL].[ 3 March 2005] http://en.paper.edu.cn/en_releasepaper/content/1631

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