Accurate Measurement of the Insertion Loss for the Low-loss Microstrip Line

The precise and efficient procedures to measure the fabricated microstrip lines with the impedance of $50 \Omega$ and unit-inch length has been proposed. The measurement fluctuation could be minimized by averaging lengths of $50-\Omega$ microstrip lines. Moreover, taking test fixture and calibration method into careful consideration, consistent results of the insertion loss could be obtained because of accurate measurement on microstrip line with low loss.