Entity

Time filter

Source Type


Feng D.,Science and Technology on Electromagnetic Compatibility Laboratory | Feng D.,China Ship Development And Design Center
2013 5th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2013 | Year: 2013

Ordinary active frequency selective surface (AFSS) was thought to consist of slots etched on one side of an substrate, with the biasing circuit on the other side. In this paper, a new AFSS without biasing circuit is proposed, the inductive voltage produced by incident wave become bias control signal of the lumped active device. Simulation result shows that the FSS resonant at 3GHz (with tiny insert loss) when the field strength of incident wave is small, then the insert loss of the FSS increase along with the field strength of the incident wave when the field strength is larger than 700V/m, the rejection of 3GHz incident wave increase to 18dB when the incident field strength become 10kV/m. © 2013 IEEE. Source


Feng D.,Science and Technology on Electromagnetic Compatibility Laboratory | Feng D.,China Ship Development And Design Center
2013 5th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2013 | Year: 2013

Frequency Selection Surface are employed in a variety of electromagnetic application, such as radomes (terrestrial and airborne), electromagnetic shielding absorbers and antennas. etc, this article discuss a new method of miniaturized FSS, unlike the others, cells of this new FSS is composing two layer of metallic patch with a thin medium between. The distributed capacitance of the periodic cell is formed by the coupling of the two metallic patches in different layers. Simulations of the important design variables are presented and a unit cell size of λ/16 is proposed. In addition, our result also implies that the structure has wide application space include multi-band FSS, polarization rotator etc. based on analysis of three other variations on the periodic structure. © 2013 IEEE. Source


Huang C.,Science and Technology on Electromagnetic Compatibility Laboratory | Wu X.,Huazhong University of Science and Technology
NDT and E International | Year: 2015

A pulsed eddy current (PEC) testing signal processing method for ferromagnetic material is presented. Without any filtering process that may produce signal distortion, the numerical cumulative integration of the noisy PEC signal is calculated and subsequently fitted to the theoretical model. The model parameter estimation is later applied to quantify the specimen thickness and reconstruct a denoised PEC signal. A comparison is made between the presented method and the former direct-fitting method. The results demonstrate that the presented method improves the testing performance in terms of the detectable thickness range, the probe lift-off distance, and the measuring time. © 2014 Elsevier Ltd. All rights reserved. Source


Feng D.,Science and Technology on Electromagnetic Compatibility Laboratory | Feng D.,China Ship Development And Design Center
Proceedings of 3rd Asia-Pacific Conference on Antennas and Propagation, APCAP 2014 | Year: 2014

In this project, an equivalent circuit model of a miniaturized FSS is proposed, it finds that the calculated result of the equivalent circuit model shows good agreement with the numerical method; this model can be used to optimize Frequency Selective Surface parameters for the desired transmission characteristics. The model can accelerate the optimize procedure a lot. © 2014 IEEE. Source


Feng D.,Science and Technology on Electromagnetic Compatibility Laboratory | Xiaoguang Wu.,China Ship Development And Design Center
2012 10th International Symposium on Antennas, Propagation and EM Theory, ISAPE 2012 | Year: 2012

Frequency Selection Surface are employed in a variety of electromagnetic application, such as radomes (terrestrial and airborne), electromagnetic shielding absorbers and antennas. etc, this article discuss a new method of miniaturized FSS, unlike the others, cells of this new FSS is composing two layer of metallic patch with a thin medium between. The distributed capacitance of the periodic cell is formed by the coupling of the two metallic patches in different layers. Simulations of the important design variables are presented and a unit cell size of λ/16 is proposed. © 2012 IEEE. Source

Discover hidden collaborations