Note on the Determination of the Offset Lines in Doherty Power Amplifiers

Guillaume Neveux (1) , Mohamed Aziz Rifi , Denis Barataud (1) , Mohammed Ayad (2) , Elodie Richard (2)

1 XLIM-SRF - Systèmes RF
2 UMS - United Monolithic Semiconductors SAS

This letter shows how to find by inspection, the values of the characteristic impedances and the electrical lengths of the offset lines of the main and auxiliary amplifiers constituting a Doherty power amplifier. This letter focuses on the easiest determination of these offset lines using the ABCD matrix coupled with the formalism of image parameters to describe the output matching circuits of the main and auxiliary amplifiers.

Mots clés: Index Terms— ABCD matrix; Doherty; image parameters; image propagation function; impedance matching; offset-lines; power amplifiers (PAs)

Domaines: Sciences de l'ingénieur [physics]; Electronique; Sciences de l'ingénieur [physics]; Micro et nanotechnologies/Microélectronique

Guillaume Neveux, Mohamed Aziz Rifi, Denis Barataud, Mohammed Ayad, Elodie Richard. Note on the Determination of the Offset Lines in Doherty Power Amplifiers. IEEE Microwave and Wireless Components Letters, 2018, 28 (6), pp.1 - 3. ⟨10.1109/LMWC.2018.2827960⟩. ⟨hal-01786897⟩