Coaxial feed structures are widely used in ultra-wide band antennas . This paper modeled the characteristic of the monopole antenna feeded by coaxial line by FDTD in the time-domiain,which showes that . Firstly, it introduced the theory of the arithm

二维光子晶体禁带算法：光子晶体中因周期性结构而存在的频率禁带称为光子禁带，光子禁带的存在是光子晶体具有广泛应用前景的重要原因。 禁带越大，可控光的频带也越宽，因此如何设计合适的晶体结构以获得大的光子禁带一直是研究和应用的重点与热点。-Algorithm for two-dimensional photonic band gap crystals: photonic crystal periodic structure exists because of the frequency band re

A closed-loop power control system having both fixed-step and adaptive-step power control algorithms and incorporating with multitap RAKE receivers was proposed. Simulations were performed for wide-band radio channels having path loss, slow