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

A detailed specification to make an ultra wide band antenna with defected ground strucutre

用于超宽带的，2维平面天线阵列的微波成像(Microwave imaging of a 2-dimensional planar antenna array for ultra wide band.)