Title :
Multi-band/multi-mode and efficient transmitter based on a Doherty Power Amplifier
Author :
Saad, Puteh ; Piazzon, L. ; Colantonio, P. ; Junghwan Moon ; Giannini, F. ; Andersson, Karl ; Bumman Kim ; Fager, Christian
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
This paper presents the design of a high peak efficiency dual-band power amplifier (PA) and how it is adopted as basic cell to implement a high average efficiency Doherty PA (DPA), achieving a dual-band/multi-mode and efficient transmitter concurrently operating at 1.8GHz and 2.4 GHz. From the dual-band PA, an average PAE of 25% has been experimentally obtained, when exited with concurrent 10MHz LTE and WiMAX signals. When using this PA as a basis for a dual band Doherty PA, the average PAE is improved (by 9 percentage units) to 34%. An adjacent channel leakage ratio (ACLR) lower than -46.5 dBc and -46.0 dBc has been fulfilled from PA and DPA, respectively, using a standard digital linearization technique.
Keywords :
Long Term Evolution; UHF power amplifiers; WiMax; radio transmitters; ACLR; DPA; Doherty power amplifier; LTE signals; WiMax signals; adjacent channel leakage ratio; dual-band PA; efficiency 25 percent; efficient transmitter; frequency 1.8 GHz; frequency 2.4 GHz; high peak efficiency dual-band power amplifier; multiband-multimode transmitter; standard digital linearization technique; Computer architecture; Dual band; Harmonic analysis; Peak to average power ratio; Power generation; Resistance; Transmitters;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
