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Stepped impedance resonators (SIRs) are composed of multiple transmission lines with different characteristic impedances and can control higher-order mode resonance frequencies. Here, identification codes from a resonator were systematically generated by utilizing these properties and introducing symmetric multimode SIRs composed of transmission lines of uniform length. In the other direction, resonator...
Recently, multiband wireless communication systems are widely used worldwide. The diplexers which can separate two frequency bands are very important circuits for these systems. In this paper, we describe a design method of matching circuits which are comprised of four lumped elements for a compact diplexer. It is suitable for the diplexers which are fabricated on a printed circuit board (PCB). The...
The fault diagnosis for high availability system is required that it detects failure points as quick as possible. Moreover, it can realize the much higher availability, if it detects the point that is more likely to break down while the system operates normally. To meet these requirements, we propose a new algorithm for the immunity-based system diagnosis, which can detect unknown fault modes. The...
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