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In this paper, a parameter optimized locally one-dimensional finite-difference time-domain (LOD-FDTD) method using simulated annealing algorithms is presented. In the proposed method, the parameter optimized LOD-FDTD method can reduce the normalized numerical phase velocity error for arbitrary incident wave angles, for different spatial-step size and for time-step sizes. The results show that the...
With the proliferation of context-aware services and human-computer interaction scenarios, the novel techniques of motion detection have attracted growing interests. There are many products which use camera, infrared sensors, RF, etc. With more Wi-Fi devices in homes and the ability to measure the PHY layer infomation, Wi-Fi based motion detection has attracted more attention than before. In this...
In this paper, a novel Fabry-Perot resonator antenna with polarization transform has been proposed, and the principle of polarized variability has been analyzed and also verified by simulation. The mechanism of polarized variability is quite simpler than a traditional antenna with complex feed network, and most important is that which can be integrated with antenna. This Fabry-Perot resonator antenna...
The broadband Fabry-Perot (FP) resonator antenna composed of single-layer quasi-periodic FSS superstrate with tapered size square patch fed by U-slotted patch is proposed, whose common bandwidth for -3 dB directivity-drop and -10 dB returned loss increases by 7.99% to 12.2% for two different cases, as compared to that of previously single layer uniform FSS. Furthermore, FP resonator antenna can be...
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