Reducing Non-Systematic Errors in Microstrip Measurements

Accuracy of error-corrected network analyzer measurements is often limited by connection repeatability errors to the device under test. An improved coax to microstrip adapteris described which provides -46 dB repeatability to 26.5 GHz. Microstrip calibration standards were developed to permit adapter de-embedding. Data from a wafer-probed MESFET is compared to measurements of the same device bonded into a microstrip carrier.