Probe method to measure the electromagnetic field in a plasma by Poynting vector conversion

The plasma generated under high temperature conditions absorbs, reflects, and scatters electromagnetic waves; interferes with the transmission of electromagnetic signals; and causes the attenuation of communication signals. This is the so-called "communication black barrier" problem. To solve this problem, it is necessary to study the interaction between plasma and electromagnetic waves. Therefore, it is necessary to measure the electromagnetic field inside the plasma with high accuracy. In this paper, a high-precision electromagnetic measurement system suitable for a high-temperature and high-speed plasma is built to provide a platform for scientific research on the interaction mechanism of the electromagnetic fields and a plasma. This paper presents a method to measure the electromagnetic field inside a plasma by using a probe and Poynting vector conversion, which is a new and completely different method from the traditional method of measuring the electromagnetic field inside plasma. In addition, for this system and method, this paper designs a microstrip antenna probe that can suppress multipath effects. This method is confirmed to be valid and usable after closed-loop verification by the CST software.