Title :
A 60MHz Bandwidth High Efficiency X-Band Envelope Tracking Power Amplifier
Author :
Theilmann, Paul T. ; Yan, Jonmei J. ; Cuong Vu ; Jeong-Sun Moon ; Moyer, H.P. ; Kimball, D.F.
Author_Institution :
MaXentric Technol., LLC, La Jolla, CA, USA
Abstract :
This paper presents a high efficiency X-band envelope-tracking power amplifier (PA) that achieves a 60MHz modulation bandwidth. The system consists of a wideband envelope modulator and a single-chip gallium- nitride (GaN) MMIC X-band PA. The envelope modulator achieves >70% efficiency while delivering >7W into an 8Ω resistive load for a 60MHz LTE-A modulated signal with a 6.6dB PAPR. The envelope tracking system attains a PAE of 35.3% (including the power dissipation of the envelope modulator) with 1.1W of average output power at 9.23GHz using a 20MHz LTE signal. The X-band PA itself was measured to achieve a drain efficiency of 81.6% with a gain of 7.6dB under these conditions.
Keywords :
Long Term Evolution; MMIC power amplifiers; LTE-A modulated signal; bandwidth 60 MHz; bandwidth high efficiency X-band envelope tracking power amplifier; drain efficiency; envelope tracking system; frequency 20 MHz; gain 7.6 dB; modulation bandwidth; power 1.1 W; resistive load; single chip gallium nitride MMIC X-band PA; wideband envelope modulator; Modulation; Peak to average power ratio; Power amplifiers; Radio frequency; Switches; Wideband;
Conference_Titel :
Compound Semiconductor Integrated Circuit Symposium (CSICS), 2013 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/CSICS.2013.6659194
