Open AccessAnalogue predistorter based on non‐linear CRLHTL
Author(s) -
Deng Hailin,
Zhou Dongfang,
Zhang Dewei,
Zhang Yi
Publication year - 2018
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.0823
Subject(s) - intermodulation , amplifier , power (physics) , physics , control theory (sociology) , telecommunications , computer science , bandwidth (computing) , control (management) , quantum mechanics , artificial intelligence
A low insertion loss (IL) analogue predistorter using non‐linear composite right–left‐handed transmission line (CRLHTL) is presented. The proposed predistorter consists of two symmetrical CRLHTL unit cells. In the experiment, this predistorter can achieve about 2.2 dB gain expansion and 17° phase shift during 4.4–4.5 GHz with only 4.3 dB IL. A C‐band 40 W solid‐state power amplifier observes 8.1 dB enhancement in the intermodulation at −6 dB output power backoff when linearised by the proposed predistorter.