PUSH-PULL TRANSFORMER FOR HIGH FREQUENCY APPLICATION

摘要

PURPOSE:To miniaturize the entire dimension of a high frequency application pushpull amplifier by loading a minute capacitance to a part connecting to a stub so as to prolong substantially the stub. CONSTITUTION:An inner conductor 11A of an input coaxial line 11 is connected to an output terminal 18A via a DC-cut capacitor 14 and an output line 16 and an outer conductor 11B is connected also to the output terminal 18B via a DC-cut capacitor 15 and an output line 17. A capacitor 1 of a proper capacitance is connected between the inner conductor 11A and the outer conductor 11B. The inner conductor 11A is connected to ground via the stub 2 and the outer conductor 11B is connected to ground via the stub 3. The stubs 2, 3 have the same length (l) and the length (l) is set to a value lambda/4 in the apparent frequency specified by the capacitance of the capacitor 1.