基于HFSS仿真重设计的2.4G PCB八木天线

<h2><span style="color: #e03e2d;">免责声明：天线类产品可能因板材厚度、每批次板材介电常数变化等原因，驻波、频点等会与仿真有差距，测试结果仅供参考，复刻前请自行斟酌风险。</span></h2> <p><span style="color: #c1d2f0;">设计参考：https://www.ti.com.cn/cn/lit/an/swra350/swra350.pdf?ts=1651263534722</span></p> <p><span style="color: #3598db;"><strong>如需复刻，板厚选1.2mm，座子为偏脚夹板座，不要在铜皮上覆盖任何东西，包括丝印</strong></span></p> <p><span style="color: #3598db;"><strong>使用时远离各种物体，包括但不限于塑料、金属、人体，保持天线净空才能发挥作用</strong></span></p> <p>&nbsp;</p> <p class="name"><strong><span style="color: #ba372a;">==============MASTER WARNING==============</span></strong></p> <p class="name"><strong><span style="color: #ba372a;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 本项目可能包含以下内容：</span></strong></p> <p class="name"><strong><span style="color: #ba372a;">&nbsp; &nbsp; &nbsp;玄学故障&nbsp; &nbsp; &nbsp;频点漂移&nbsp; &nbsp; &nbsp;驻波上天&nbsp; &nbsp; &nbsp;信号微弱&nbsp; &nbsp; &nbsp;飞行模式</span></strong></p> <p class="name"><strong><span style="color: #ba372a;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 如有不适，请尽快适应</span></strong></p> <p class="name"><strong><span style="color: #ba372a;">==============装订线内禁止作答===============</span></strong></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 18pt;">设计天线第一步：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">我们先来画个图，比如这样：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/dff2b2fbaa3b43a7bf9acf5d8562c341.jpg" alt="" width="522" height="326" /></span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">接着导出STP格式，比如这样：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/f19ecf11c79041e0b6a42ddfa1743910.jpg" alt="" width="521" height="614" /></span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">然后打开HFSS，导入STP，注意设置好材质和airbox，还有馈电点也别忘了</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/b047a499bb1e41c3a1760761c2d0f372.jpg" alt="" width="600" height="263" /></span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">设置好求解模式和频率范围</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/f6001026ba694842bfd3b8f7b7987178.jpg" alt="" width="598" height="513" /></span></p> <p class="name"><span style="color: #87ceff;"><span style="font-size: 14pt;">开始漫长的仿真过程ing......</span></span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/61193cc9765a4c59a6bb5a45feef7fee.jpeg" alt="" width="121" height="121" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">然后仿真好了，接下来是结果</span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">S11参数：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/267c8489ab4c495eb5dbb5e31ace9f58.png" alt="" width="642" height="406" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">VSWR参数：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/b48723282675495185ad029b9642ca5b.png" alt="" width="651" height="412" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">三维增益方向图：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/39ab5027b4c94fcfb148125ee86822b6.png" alt="" width="641" height="406" /></span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">最大增益和天线效率：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/e8a00823fc98499697820e44672d0f7e.png" alt="" width="492" height="419" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">==============仿真部分结束，开始实物测试==============</span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">使用安捷伦E5071C网络分析仪，实测结果如下</span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">S11参数：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/ca1d02b4149d4a0eb2de7484963f9e90.jpg" alt="" width="633" height="496" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">VSWR参数：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/7ba93f266295447b92ea407c443389b7.jpg" alt="" width="633" height="496" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">史密斯图：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/976cdf97dab2458b95c110e3cae47003.jpg" alt="" width="633" height="496" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">以为我们止步于网分了吗？ </span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><span style="font-size: 36pt;"><strong>NO!</strong></span></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">接下来有请重量级嘉宾&mdash;&mdash;<span style="font-size: 24pt;">微波暗室</span></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/576cf3b4835c4a648accc0a288ca7236.png" alt="" width="605" height="506" /></span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">通过暗室测试可以得出</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">1、最大增益点在2.41G上，增益为7.59dBi，比仿真结果好</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">2、在2.41G~2.48G的带内平坦度为0.54dB，符合预期</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">3、天线效率在2.41G为70%，2.48G为58%，低于仿真结果</span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">E面实测结果：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/2bd454d5c31145e58782559fcf2d4b81.png" alt="" width="613" height="514" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">H面实测结果：</span></p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/4c12181df90d414e8244283c279873b0.png" alt="" width="612" height="514" /></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">三维增益方向实测图：</span></p> <p class="name"><span style="color: #87ceff;"><span style="font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/107fa6d2907a43bbbeaf1a1c8625ad6a.png" alt="" width="607" height="503" /></span></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff;"><span style="font-size: 14pt;">现已实际应用，并加入豪华套餐.jpg</span></span></p> <p class="name"><span style="color: #87ceff;"><span style="font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/e22a27a0e9b343de8b966b491b5bcf79.jpg" alt="" width="602" height="301" /></span></span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;">===================E N D======================</span></p> <p class="name">&nbsp;</p> <p class="name"><span style="color: #87ceff; font-size: 14pt;"><img src="//image.lceda.cn/oshwhub/7ae65e84a2f94a708ccdc1428eab9b86.jpeg" alt="" width="276" height="192" /></span></p> <p class="name">&nbsp;</p>