This study reports on a dual-port, side-incident microwave probe dedicated to the non-destructive inspection of metal pipes. Two types of side-incident probes (LJ and JL) are proposed to emit TM 01 - and TM 02 -mode microwaves into the pipe under test, and each type of probe has two ports used to inspect in two opposite directions. Numerical simulations are conducted to study the dimensional parameters affecting the transmission characteristics of the probe and optimize the probe to obtain better mode purity and transmission directivity. The simulation results also suggest that the optimal probe dimensions for one inner pipe diameter can be applied to another diameter by multiplying the dimensions by a factor that is determined by the ratio of two diameters. Two LJ-type, side-incident probes, one with an inner diameter of 19 mm and one of 39 mm, are fabricated according to the simulation results. Experimental verification is subsequently carried out to test the...

中文翻译：

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用于检测管道内损坏的双端口侧面入射微波探头的设计

这项研究报告了一种专用于金属管道无损检测的双端口侧面入射微波探头。提出了两种类型的侧面入射探头（LJ和JL），将TM 01-和TM 02-模式微波发射到被测管道中，每种类型的探头都有两个用于在两个相反方向上进行检查的端口。进行了数值模拟，以研究影响探头传输特性的尺寸参数，并优化探头以获得更好的模式纯度和传输方向性。仿真结果还表明，可以通过将尺寸乘以由两个直径之比确定的系数，将一个内管直径的最佳探头尺寸应用于另一个直径。两个LJ型侧面入射探头，一个内径为19 mm，另一个为39 mm，根据仿真结果制作。随后进行实验验证以测试...