共面波导馈电印刷单极天线的频带阻断

Band-Notch for CPW-Fed Printed Monopole Antenna

提出一种具有频带阻断特性的小型化渐变共面波导馈电矩形单极天线．通过在辐射贴片上开U形缝隙，来获得对于无线局域网（WLAN）频段的频带阻断，并详细分析了缝隙各参数对频带阻断特性的影响．分析表明，频带阻断特性可通过控制U形缝隙的位置来实现，而通过调整缝隙的长度和宽度可改变所阻断频带的位置．实验结果表明，所提出的天线实现了5．07～5．85GHz的阻带特性，且具有阻抗带宽达15：1的超宽带特性．

A compact rectangular monopole antenna fed by a tapered coplanar waveguide （CPW） with a band-notch function is proposed. A U-shaped slot is cut in the radiation patch to obtain the band-notch function and its parameters studied in detail. It is shown that the band-notched function can be realized by controlling location of the U-shaped slot. The notched band can be changed by adjusting the length and the width of the slot. Experimental results show that the proposed antenna has a stop-band of 5.07 GHz to 5.85 GHz and a super-wideband characteristic, with impedance bandwidth reaching 15：1.