Single-ended test method for wave-absorbing characteristic of material

A single-ended test device for the wave-absorbing characteristic of a material, comprising:

• a sample cavity having one end provided with a test fixture;
• a microwave transmission rod arranged in the sample cavity and connected with the test fixture in a penetrating mode;
• two spring needles, respectively arranged at the two ends of the microwave transmission rod, wherein one spring needle of the two spring needles being connected with the test fixture in a penetrating mode;
• an SMA joint arranged at another end of the sample cavity and connected with the other spring needle of the two spring needles in a penetrating mode;
• and
• a vector network analyzer having a receiving end electrically connected with a coaxial cable, and another end of the coaxial cable being electrically connected with a wiring end of the SMA joint;
• wherein the test fixture comprises a short-circuit joint, a non-magnetic metal block is arranged on the front face of the short-circuit joint and is configured to place and contact with a sample, a first contact hole is formed in a middle of a front face of the non-magnetic metal block, one end of the one spring needle is connected with the first contact hole in a penetrating mode, an inner wall of one end of the sample cavity is provided with an internal thread, an outer wall of the non-magnetic metal block is provided with an external thread, and the internal thread is matched with the external thread;
• and
• wherein the single-ended test device is configured to measure the wave-absorbing characteristic of a material to be measured.