Patent Number: 6,400,963

Title: Harmonic suppression in dual band mobile phones

Abstract: To effectively suppress harmonics in a dual band mobile phone with a power amplifier (10) outputting transmitting signals for different frequency bands (GSM; PCS, DCS) via a single output as described a power amplifier output circuit in which harmonics are filtered through impedance transformation of a turn-off impedance of a transmitter/receiver change over unit (36, 38). Hereby the desired filtering of harmonics may be achieved without almost no additional expenditure.

Inventors: Glockler; Roman (Lauf, DE), Herold; Alexander (Nuremberg, DE), Johansson; Paul (Malmo, SE)

Assignee: Telefonaktiebolaget LM Ericsson (publ)

International Classification: H04B 1/40 (20060101); H04B 1/48 (20060101); H04B 1/44 (20060101); H04B 001/38 ()

Expiration Date: 06/04/2019