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http://dx.doi.org/10.5515/KJKIEES.2012.23.4.475

Design of Hybrid Supply Modulator for Reconfigurable Power Amplifiers  

Son, Hyuk-Su (Intelligent Radio Engineering Center, Korea Advanced Institute of Science and Technology)
Kim, Woo-Young (Intelligent Radio Engineering Center, Korea Advanced Institute of Science and Technology)
Jang, Joo-Young (Intelligent Radio Engineering Center, Korea Advanced Institute of Science and Technology)
Lee, Hae-Jin (Intelligent Radio Engineering Center, Korea Advanced Institute of Science and Technology)
Oh, Inn-Yeal (Intelligent Radio Engineering Center, Korea Advanced Institute of Science and Technology)
Park, Chul-Soon (Intelligent Radio Engineering Center, Korea Advanced Institute of Science and Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.4, 2012 , pp. 475-483 More about this Journal
Abstract
This paper presents new type of the hybrid supply modulator for the next reconfigurable transmitters. The efficiency of the hybrid supply modulator is one of the most important performance. For enhancement the efficiency, multi-switching structure in the hybrid supply modulator is employed. Additionally, input envelope signal sensing stage is employed for implementation multi-mode operation. To compare the performance of the proposed hybrid supply modulator, the conventional hybrid supply modulator is also designed. The measured efficiency of the proposed hybrid supply modulator is 85 %/84 %/79 % for EDGE/WCDMA/LTE signals which have 384 kHz/3.84 MHz/5 MHz bandwidth, respectively. The efficiency of the proposed hybrid supply modulator is higher than the conventional hybrid supply modulator. Therefore, this structure shows good candidate for the reconfigurable transmitters.
Keywords
CMOS; Hybrid Supply Modulator; Power Amplifier; Reconfigurable Transmitter;
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