2.3.6 Electromagnetic parameter test
The specimen for the electromagnetic parameter test is a coaxial ring.
The outer diameter is 23mm, the inner diameter 10mm, and the height
20mm. Before testing, polish the surface of the specimen cured to 28
days until there are no burrs and chamfers. Then, it is dried in a
drying oven to a constant weight with the temperature of 50°C and then
kept in a dry environment. The test frequency band of electromagnetic
parameters is 0.2 to 5 GHz, and the coaxial transmission/reflection
method is adopted by using a vector network analyzer produced by China
Ceyear Technology Co., Ltd.