A Method of Precise Measurement to Distinguish the Insertion-Loss Variance of Microstrip Lines With Different Metal Strips

An efficient and precise method to distinguish the insertion-loss variance of the microstrip lines with different metal strips has been proposed. These microstrip lines with an impedance of
$50~\Omega $
and a length of a unit inch have been adopted. Moreover, the test fixture with two protected adopters and short-open-load-through (SOLT) calibration is adopted. By connecting to the vector network analyzer (VNA) directly, the insertion loss of two adapters, to protect the test fixture, can be obtained. Moreover, the insertion loss of the test fixture can be derived by averaging the fluctuated 50-
$\Omega $
microstrip lines. Therefore, carefully removing the influence from two adapters, the test fixture and the calibration method, consistent results of precise insertion losses of the 50-
$\Omega $
microstrip lines with a unit length could be obtained.