一种新型的低剖面定向45°线极化水天线

摘要

A novel linearly polarized water antenna inclined at 45 degrees with a high front-to-back ratio (FBR) is proposed.The broadside radiation pattern is realized by using a dipole to feed the structure.The dipole is placed near the ground surfaceto force the energy to the nearest field, reducing the energy loss caused by the distilled water.The results show that an impedance bandwidth from 823 to 873 MHz for | S (11|) ＜-10 dB with again of approximately 7. 73 dBi and a high radiation efficiency (better than 70％ through the whole operating band) are obtained.%本文提出了一款具有高前后比的45°线极化水天线.天线利用电偶极子作为馈电结构,实现了边射的辐射特性.通过减小电偶极子与地板之间的距离,能量被束缚在电偶极子与地板之间,减少了水介质损耗所引起的能量.天线的反射系数在828～873 MHz频段内小于-10d B.在整个工作频段内,天线的增益在7.73 d Bi左右,辐射效率达到了70％以上.