【摘要】 常规准八木微带天线受振子结构的限制,阻抗带宽有限。针对准八木微带天线的阻抗特性提出2种改进方案。方案一是在保证辐射带宽的基础上,利用"领结"型的贴片形式有效展宽天线的阻抗带宽。方案二通过改变引向器的结构,使其工作于C波段。仿真结果表明,2种改进型天线都达到了50%以上的阻抗带宽(反射系数小于-10 dB),验证了方案的有效性。更多还原

【Abstract】 The impendence bandwidth of conventional qusai-yagi microstrip antenna is limited by the traditional rod structure of dipole.Two modified antennas which have wider impendence bandwidth are proposed in this paper.Bow-tie style radiating patch is introduced to extend the impendence bandwidth of antenna effectively.Qusai-yagi microstrip antenna is also made to operate in C-band by changing the pattern of director.Simulation results indicate that the proposed antennas have more than 50% impendence bandwidth with less than-10 dB return loss.更多还原