Abstract: Amplitude modulation (AM) is widely used for not only wireless ... its use may encounter difficulty in IC implementation. Varactor diode is a capacitor of which capacitance varies according ...

The theory is verified by a demonstrator PA based on a gallium nitride (GaN) device and a varactor as the tuneable element. The load modulation shows good results from 1.7 GHz to 2.3 GHz and up to 50% ...