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	1. 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


	2. 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


	3. 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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