This paper presents the design and implementation of a low-voltage-stress Class-EF power amplifier (PA) with extended maximum operating frequency, named as ‘third-harmonic-peaking Class-EF PA’. A novel transmission-line load network is proposed to meet the Class-EF impedance requirements at the fundamental, all even harmonics, and third harmonic components. It also provides an impedance matching to a 50 Ω load. A more effective λ/8 open- and shorted-stub network is deployed at the drain of the transistor replacing the traditional λ/4 transmission line. Implemented using GaN HEMTs, the PA delivered 39.2 dBm output power with 80.5% drain efficiency and 71% PAE at 2.22 GHz.
|Number of pages||2|
|Publication status||Published - 01 May 2014|
|Event||17th Research Colloguium on Communications and Radio Science into the 21st Century - Royal Irish Academy, Dublin, Ireland|
Duration: 30 Apr 2014 → 01 May 2014
|Conference||17th Research Colloguium on Communications and Radio Science into the 21st Century|
|Period||30/04/2014 → 01/05/2014|