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The combination space concept had its origin in the theory of subspace and combinatorics. The combination space may be treated as the space reconstruction through combination, as well as the subspace one. Several new analytical methods are proposed based on combination principles applied to some operations. Under progressing structural damage, simple raw data cannot adequately characterize continuously...
A feasible design of balun filter is implemented using a circular sector patch element with simplicity in design and fabrication. In order to further improve bandpass filtering properties and compress the circuit size simultaneously, complementary split ring resonators are introduced on the patch element. For demonstration, two patch balun filters operating at different frequencies are fabricated...
In this paper, a novel patch based balun with compact size is presented. This balun consists of a simple square patch etched by a pair of asymmetric slots. The unbalanced input port is orthogonally arranged in-between two balanced output ports along the patch. Asymmetrical width and length of the cross-loaded slots perturb the field of the patch and prolong the flow of the current path for miniaturization,...
This paper presents a millimeter-wave 3 dB coupler configuration to provide an arbitrary phase difference between two output ports. The property can be easily achieved by adjusting the separation angle between ports located on the contour of patch, resulting in a simple design procedure. To verify the feasibility of the proposed configuration, the 60° and 135° patch 3 dB couplers operating at 30 GHz...
An integrated direct carbon solid oxide fuel cell is studied with an in situ catalytic steam gasification of carbon by ceria, which can significantly improve the power density of the single cell. Using normal bubbling of the carrier nitrogen gas in temperature‐controlled water bath, the carbon gasification can be realized easily and further improved by addition of the catalyst (Ce, Ca, K). A peak...
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