Impedance measurements at millimeter wave frequencies (54.2 GHz)

A WAVEGUIDE CIRCUIT (Figure 1) has been designed and constructed to measure impedance at millimeter wave frequencies. To calculate the load impedance, known standards were used to characterize the network transformation between the plye of measurement and the load location. Measurements were performed at 54.2 GHz on specially fabricated loads and on mm-wave PIN diodes.