Rohde & Schwarz’ optional harmonic filters for its SMB100A microwave signal generator make it possible to achieve harmonic suppression of more than –50 dBc over a frequency range of 150 MHz to 40 GHz.
Are you talking about an inverter? Generators will always make sine waves. Generally speaking, no...there aren't good/cheap filters for a 5.5kw source. The main concern is with motors. Otherwise, you ...