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Zhenjiang, China

Fang Y.-t.,Zhenjiang Watercraft College | Liang Z.-c.,Nanjing University of Posts and Telecommunications
Optics Communications | Year: 2010

Basing on the condition that the incident angle is larger than the total internal reflection angle, we present a systematic study of transmission properties of one-dimensional photonic crystal with all dielectric materials by the transfer matrix method and the Bloch's theorem. Due to the existence of the evanescent field within the structure, the transmission bands consist of some discrete symmetry peaks. For light with these peak frequencies, the structure is either transparent or opaque depending on the number of the structure periods. The unusual transmission properties are attributed to the field distribution and Bloch wave vector. © 2010 Elsevier B.V. All rights reserved.

Xia B.,Shanghai JiaoTong University | Xia B.,Zhenjiang Watercraft College | Wu L.-S.,Shanghai JiaoTong University | Mao J.,Shanghai JiaoTong University
IEEE Transactions on Microwave Theory and Techniques | Year: 2012

In this paper, a new balanced-to-balanced power divider/combiner is proposed. By using matrix transformation, two three-port networks for the odd-and even-mode circuit models are deduced, based on the constraint rules of the mixed-mode S-parameters. In order to satisfy the two required scattering matrices simultaneously, the resistances of lumped elements, the characteristic impedances and electrical length of transmission lines are selected appropriately. Then, a planar microstrip structure is designed to realize the proposed balanced-to-balanced power divider/combiner with equal power division. The theoretical, simulated and measured results all show a good mixed-mode performance. In the measurement, the maximum differential-mode transmission coefficient is-3.2 dB, the best differential-mode isolation is 47.2 dB, and the fractional bandwidth of its operating band is approximately 20.8%. © 1963-2012 IEEE.

Xia B.,Shanghai JiaoTong University | Wu L.-S.,Zhenjiang Watercraft College | Mao J.,Shanghai JiaoTong University
IEEE Transactions on Microwave Theory and Techniques | Year: 2013

The authors of the original above-named article [ibid., vol. 60, no. 9, pp. 2791¿2798, Sep. 2012] appreciate the comments by M.-J. Park [ibid., vol. 61, 2013]. The authors agree that their proposed balanced-to-balanced power divider/combiner structure can be simplified into the form proposed in the comments of Park when only the circuit performance at the central frequency is considered. The main reason is that the half-wavelength transmission line can be regarded as an ideal phase inverter with special properties, including those described by Park [see (1)¿(4)]. However, the two structures have different characteristics at other frequencies, and it should also be pointed out that the curves in Park's Fig. 3 cannot completely describe the frequency responses of the structure since it is not symmetric to its middle plane any more. From a theoretical analysis and simulations presented, it can be concluded that the balanced-to-balanced power dividers originally presented by Park and the authors and this letter are equivalent to each other at the central frequency due to the special properties of ideal phase inverters, and all of them can be converted from a two-way single-ended Wilkinson power divider. The authors' proposed power divider had four resistors and a symmetric configuration, which provides two differential-mode outputs with the same magnitude and the best bandwidth. The power dividers proposed by Park and this letter have fewer resistors, but their two outputs are not symmetric and the operating bands are also narrowed. Therefore, if symmetric performances and relatively large bandwidth are prior in design, the originally proposed four-resistor structure is preferred. When compact size and few resistors are desired, the type C one-resistor structure, given in Fig. 1(d) of this reply, is more suitable. © 1963-2012 IEEE.

Yu G.,Nanjing Forestry University | Fang Y.-T.,Zhenjiang Watercraft College
Optics and Laser Technology | Year: 2011

The transmission spectra of two-period metal-dielectric structure are studied through the transfer matrix method. When the dielectric is nonlinear material, an optical bistability has been found. The upper threshold value is insensitive to incident frequency, while the lower threshold value increases with the incident frequency decreasing. The effect of loss from the metal layers on the optical bistability is also considered. © 2010 Elsevier Ltd. All rights reserved.

Wang Y.,Zhenjiang Watercraft College
Physica Status Solidi (A) Applications and Materials Science | Year: 2012

We report an indium-free transparent resistive switching random access memory (TRRAM) device based on a gallium-doped zinc oxide (GZO)-Ga 2O 3-ZnO-Ga 2O 3-GZO structure grown by metal-organic chemical vapor deposition. The bipolar resistive-switching behavior is investigated based on the filament model. ZnO insulator layer fabricated at different temperature are compared to further support the filament mechanism. The compliance current applied on the device is changed from low to high to study the properties of conductive filaments in ZnO. The Joule-heating effect is also studied by adjusting the integrating time in voltage sweeping. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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