电波科学学报2017，Vol.32Issue(4)：391-397,7.DOI:10.13443/j.cjors.2017072201
钻杆内孔微波多径信道研究与测试
Research and measurements on characteristics of microwave transmission multipath channel in drill pipe
摘要
Abstract
In this paper,the drill pipe bore is considered as an ultra long irregular lossy circular waveguide,and the channel model is established by using multipath transmission theory.Meanwhile,the channel characteristics and signal attenuation mechanism are analyzed,combining the experimental statistics.The analysis results show that the API 5" and 51/2" drill pipe bore,widely applied in air drilling field,can be used as the 2.4 GHz band microwave channel,and are in accordance with the ultra wide band (UWB) channel standard.However,the numerous reflected waves are generated by the reflective surface in the joint section of the drill pipe,which makes the channel has the characteristics of dual cluster and multi-path channel.The large delay between the two clusters leads to a significant increase of the root mean square delay spread,and according to the model contrast results,the multipath fading and delay are the main factors affecting the propagation quality.关键词
双簇多径信道/UWB信道/超长不规则有耗圆波导/多径衰落模型/微波随钻测量Key words
double cluster multipath channel/ultra wide band channel/ultra long irregular lossy cylindrical waveguide/multi-path fading model/microwave measurement while drilling(MMWD)分类
信息技术与安全科学引用本文复制引用
夏文鹤,孟英峰,李伟勤..钻杆内孔微波多径信道研究与测试[J].电波科学学报,2017,32(4):391-397,7.基金项目
国家科技重大专项(2016ZX05021-003-003HZ) （2016ZX05021-003-003HZ）
