微带宽缝天线的谐振频率和带宽特性

Research on Resonance Frequency and Bandwidth of Wide Slot Microstrip Antenna

摘要: 借助时域有限差分法(FDTD)对微带宽缝天线的频率和带宽特性进行了分析讨论.采用高斯脉冲激励,对计算空间采用非均匀网格划分,通过FDTD,一次计算就可得到天线谐振频率和带宽的参数.研究了微带宽缝天线的频率和带宽特性随着缝宽变化的规律.发现当缝宽从1mm增加到30mm时,天线的谐振频率从3.4GHz降低到2.3GHz,天线的10dB带宽可从9%增加到28%.

Abstract: Wide slot microstrip antenna is analyzed by means of finite-difference time-domain(FDTD) method.Using Gaussian pulse source excitation and non-uniform grids,the parameters of antenna,such as resonance frequency and bandwidth,can be obtained by FDTD method.The distributions of resonance frequency and bandwidth of antenna according with the slot width are obtained.While the slot width is ranging from 1mm to 30 mm,the resonance frequency is from 3.4GHz to 2.3GHz and the 10dB bandwidth of the antenna is from 9% to 28%.