A Spur-Reduced Multimode Power-Level Tracking Power Amplifier Using a Frequency-Hopping DC-DC Converter

作者：Chen Jau Horng^*; Liu Pang Jung; Hung Yu Ling; Yang Hao Shun; Chen Yi Jan Emery

来源：IEEE Transactions on Microwave Theory and Techniques, 2010, 58(5): 1333-1338.

DOI：10.1109/TMTT.2010.2042858

• DC-DC power conversion
• microwave amplifiers
• power amplifiers (PAs)
• radio transmitters

This paper presents a power-level tracking power amplifier with reduced spurious emission by utilizing a dc-dc converter with frequency-hopping capability. Measurements were performed for a wideband code-division multiple access (W-CDMA) signal and an EDGE signal at 836.5 MHz. The results show a two times improvement in average efficiency while showing negligible spectral degradation for the W-CDMA standard. For the EDGE standard, the efficiency was also improved by a factor of 2 for medium power levels compared to not using a dc-dc converter. Moreover, the spurious emissions were improved by up to 4.5 dB using the proposed technique.

• 出版日期2010-5
• 单位中国科学院电工研究所