Abstract:
This article presents a compact, efficient, and linear Q-/V-band silicon–germanium (SiGe) heterojunction bipolar transistor (HBT) cascode power amplifier (PA) for emerging very low-Earth-orbit (VLEO) satellite communication (SATCOM). A novel four-way Wilkinson combiner balun (WCB), realized by two coupled line impedance inverting baluns (ZIBs) and isolation (ISO) resistors ( $R_{…