Ultrabroadband Linear Power Amplifier Using a Frequency-Selective Analog Predistorter
- Authors
- Seo, M[Seo, Mincheol]; Kim, K[Kim, Kyungwon]; Kim, M[Kim, Minsu]; Kim, H[Kim, Hyungchul]; Jeon, J[Jeon, Jeongbae]; Park, MK[Park, Myung-Kyu]; Lim, H[Lim, Hyojoon]; Yang, Y[Yang, Youngoo]
- Issue Date
- May-2011
- Keywords
- Analog predistorter; broadband power amplifier; frequency-selective predistorter; linearization; pushpull
- Citation
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, v.58, no.5, pp.264 - 268
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
- Volume
- 58
- Number
- 5
- Start Page
- 264
- End Page
- 268
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/70180
- DOI
- 10.1109/TCSII.2011.2149170
- ISSN
- 1549-7747
- Abstract
- This brief presents an ultrabroadband (2- to 600-MHz band) linear power amplifier using a compact frequency-selective analog predistorter, which includes a capacitor having an optimized capacitance and a biased Schottky diode connected in series. It is shunted at the input of the main amplifier and has a frequency-selective third-order intermodulation generation capability using its optimized capacitance. A two-stage push-pull power amplifier, which has an ultrabroadband operation range from 2 to 600 MHz, was implemented and linearized using the proposed analog predistorter. It exhibited high 1-dB compression point (P1 dB) and power-added efficiency characteristics of over 43 dBm and 32% at each P1 dB for the entire operating band, respectively. At an average output power level of 36 dBm for the two-tone signal input, which has a tone spacing of 1 MHz, its third-order intermodulation distortion over the entire band is no higher than -39.1 dBc after linearization, as compared with -34.2 dBc before linearization.
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- Appears in
Collections - Information and Communication Engineering > School of Electronic and Electrical Engineering > 1. Journal Articles
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