INDUCTIVELY COUPLED TRANSFORMER WITH TUNABLE IMPEDANCE MATCH NETWORK

摘要

A packaged RF power transistor includes an RF input lead, a DC gate bias lead, an RF power transistor comprising gate, source and drain terminals, and an input match network. The input match network includes a primary inductor electrically connected to the RF input lead, a secondary inductor electrically connected to the gate terminal and to the DC gate bias lead, and a tuning capacitor electrically connected to the RF input lead and physically disconnected from the gate terminal. The input match network is configured to block DC voltages between the RF input lead and the gate terminal and to propagate AC voltages in a defined frequency range from the RF input lead to the gate terminal. The tuning capacitor is configured to adjust a capacitance of the input match network based upon a variation in DC voltage applied to the RF input lead.

主权项

1. A packaged RF power transistor, comprising:
an RF input lead; a DC gate bias lead; an RF power transistor comprising gate, source and drain terminals; and an input match network, comprising:
a primary inductor electrically connected to the RF input lead;a secondary inductor electrically connected to the gate terminal and to the DC gate bias lead; anda tuning capacitor electrically connected to the RF input lead and physically disconnected from the gate terminal; wherein the input match network is configured to block DC voltages between the RF input lead and the gate terminal and to propagate AC voltages in a defined frequency range from the RF input lead to the gate terminal, and wherein the tuning capacitor is configured to adjust a capacitance of the input match network based upon a variation in DC voltage applied to the RF input lead.