微波随钻通信中天线激励TE_(11)模的结构研究  

Research on the Structure of Antenna Excited TE_(11) Mode in Downhole Microwave Communication

作　　者：吴泓威 过方舟 陈实华 WU Hongwei;GUO Fangzhou;CHEN Shihua(College of Electrical Information,Southwest Petroleum University,Chengdu 610500,China;The 29th Research Institute of China Electronics Technology Group Corporation,Chengdu 610036,China)

机构地区：[1]西南石油大学电气信息学院,成都610500 [2]中国电子科技集团公司第二十九研究所,成都610036

出　　处：《微波学报》2024年第S1期125-127,共3页Journal of Microwaves

基　　金：国家自然科学基金(62101468)

摘　　要：本文针对钻杆衰减测量,设计了一种圆波导TE_(11)模激励结构。该装置能够直接插入钻杆内部,避免了钻杆因形状非理想引起的对接问题。提出的激励由两部分组成,分别是微带线到共面线的过渡结构和三段式的八字天线激励结构。其中,前种结构使微带线能够顺利过渡到共面线,并实现阻抗匹配。此外,八字天线采用三段渐变结构,能够拓宽天线带宽。对结构进行优化,仿真结果表明,在1.9 GHz~2.5 GHz频带范围内回波损耗优于15 dB,插入损耗低于1 dB。This article designs a circular waveguide TE_(11) mode excitation structure for measuring drill pipe attenuation.This device can be directly inserted into the interior of the drill pipe,avoiding docking problems caused by the non ideal shape of the drill pipe.The proposed excitation consists of two parts,namely the transition structure from microstrip line to coplanar line and the three-segment octagonal antenna excitation structure.Among them,the first structure enables microstrip lines to smoothly transition to coplanar lines and achieve impedance matching.In addition,the octagonal antenna adopts a three-stage gradient structure,which can broaden the antenna bandwidth.Optimizing the structure,simulation results show that the return loss is better than 15 dB and the insertion loss is less than 1 dB in the frequency band range of 1.9 GHz to 2.5 GHz.

关 键 词：气体钻井 井下通信 微带线到共面线过渡 TE_(11)模 天线 

分 类 号：TN820[电子电信—信息与通信工程] TE921.2[石油与天然气工程—石油机械设备]