Patent ID: 11949546
Assignee: ERIDAN COMMUNICATIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 27:
28. A method of filtering a modulated radio frequency (RF) carrier signal produced by a polar modulator, comprising:
passing a fundamental component of the modulated RF carrier to a load using a low-pass filter (LPF) having a first filter order; and
absorbing a harmonic component of the modulated RF carrier signal reflected from the LPF toward an output of the polar modulator using an absorptive high-pass filter (HPF),
wherein the LPF has a corner frequency different from a corner frequency of the absorptive HPF, the absorptive HPF is a first order series-RC filter, and the LPF comprises a second order or higher LC ladder filter.