Analysis Of Electromagnetic Photonic Crystals By Locally Conformal FDTD Method

Photonic Crystals is an artificial periodic structure with the characteristic of bandsuppression, which is composed of one kind of material in which another kind ofmaterial is periodically distributed. Its structure is simply made, small in size, light inweight, and easily integrated in microwave wave band, which is not surpassed by otherapparatus. At the same time, the applications of the PBG structure may improve theperformance of the radar system in many ways, and have significant values no matter itis used in army or in public. Photonic Crystals' application to the microwave field is mainly studied byapplying Parallel Modified Locally Conformal FDTD method in this paper, includingthe study of radiation characters when wire antenna is reflected by the PBG reflectingboard, the study of round PBG filter using Locally conformal FDTD method. Uponthese, the FDTD parallel method is primarily studied, and the radiation character of thePBG round wave-guide open antenna that need a great mount of computing is analyzedby applying Parallel Modified Locally Conformal FDTD method. The result showsthat the PBG structure has obvious character of forbidden band at the suitable size, andcan be designed to good performance microwave filter. The PBG structure have thecharacter of high resistance, that can reinforce the forward radiation, and reduce thebackward radiation, increase the directivity, improve the gain and ameliorate theperformance of the antenna. In addition, the PBG structure can also greatly increasethe isolation and significantly decrease the coupling between the antenna elements.This paper simulated the numerical value of these applications, and the result isaccordant with other method.