MATCHING OF ACTIVE MILLIMETER-WAVE SLOT-LINE ANTENNAS

The matching of a radiating, resonant structure to an active millimetr e-wave device is investigated. As an active device, an IMPATT diode is considered to be matched to a planar slot-line structure. An analytic al IMPATT diode model and an equivalent circuit of the slot line are u sed to calculate possible oscillation frequencies and large-signal mod ulation parametres of the diode. In the case of matching the output po wer is predicted. The results are in satisfactory agreement with exper imental data and suggest a diode design with shorted drift regions and reduced diode area for optimum impedance matching.