一种新型宽频带三角形微带天线的设计

提出了一种展宽三角形微带天线工作带宽的新方法。通过在三角形微带贴片加载与侧边平行的缝隙来实现双频,添加垂直于底边的缝隙使两个频点靠近,经仿真软件优化后,最终实现频带展宽。仿真结果表明,所设计天线的工作带宽(VSWR<2)是普通三角形微带天线的4倍,且天线尺寸与同频率未加载缝隙的天线相比缩小5%。进行了实物加工与测量,实验结果与仿真结果吻合,证明了所提出方法的有效性。

A Novel Broadband Equilateral Triangular Microstrip Patch Antenna

A novel design of wideband triangular microstrip patch antenna is proposed, in which the dual-band operation is realized by loading a pair of narrow slots paralleled to the side edges of the equilateral triangular patch. Furthermore, it is found that by embedding a pair of narrow slots perpendicularly to the bottom edge, a tunable frequency ratio of the two frequencies is achieved by simulation. Finally broadband operation of the triangular microstrip antenna near its fundamental resonant mode can be realized by the optimization tool of Ansoft HFSS. Simulation results show, compared to the conventional triangular microstrip antenna, the proposed antenna achieves a 4 times bandwidth （VSWR 〈 2） and a size reduction of 5 % . The proposed antenna is fabricated and measured, and the measurement results are found in good agreements with the simulation results, thus the validity of the design is verified.