小型化蝶形微带天线的全波分析

采用矩量法分析了蝶形微带贴片天线，可用于比较准确地预测这类微带贴片天线的输入阻抗，谐振频率和方向图，根据该天线的特定形状，采用全域基和脉冲基相结合的基函数，同时采用渐进抽取方法处理求解过程中遇到的奇异函数积分，将两维无限积分化为一维有限积分，从而大大缩短了计算时间，通过本程序得到的计算结果和实验结果比较一致，数值结果也表明，这种蝶形天线是比较普通矩形微带贴片天线面积小很多的一种小型化设计。

Full-Wave Analysis of Compact Bow-Tie Microstrip Antennas

The bow-tie microstrip antenna is analyzed by using the moment method. This analysis can accurately predict the resonant frequency, input impedance, and radiation patterns. For this particular shape of patch, a new hybrid basis function is adopted, which is a combination of a full domain basic function and an impulse basic function. The asymptotic extraction technique is involved in calculating the Sommerfeld-type integral. This formulation allows the infinite double integral of impedance matrix to be transformed into a finite one-dimensional integral, significantly reducing the computation time. The calculated results of this program agree well with experimental ones. It is shown that bow-tie microstrip antenna is a type of new compact antennas with smaller size than that of commonly used rectangular patch antennas.