A new linear amplifier using low-frequency second-order intermodulation component feedforwarding
SCIE
SCOPUS
- Title
- A new linear amplifier using low-frequency second-order intermodulation component feedforwarding
- Authors
- Yang, YG; Kim, B
- Date Issued
- 1999-10
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGI
- Abstract
- A new linearization method by feedforwarding low-frequency second intermodulation component (f(2) - f(1)) is proposed. Drain voltage modulation by the forwarding second intermodulation voltage improves linearity significantly. This new technique, which adopts a simple circuit configuration, has advantages in the stability and bandwidth due to the feedforwarding nature and shows a very good performance in comparison with other harmonic tuning circuits. Analytical derivation of low-frequency feeding voltage gain (beta) to obtain perfect cancellation of IMD3 is presented. For verification of the proposed circuit topology, a two-tone test and a CDMA signal test at carrier frequency 2.15 GHz are performed and show about 18- and 10-dB improvement of IMD3 and adjacent channel power ratio (ACPR), respectively.
- Keywords
- feedforwarding; harmonic; intermodulation; linear amplifier; nonlinear; MESFETS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/20227
- DOI
- 10.1109/75.798035
- ISSN
- 1051-8207
- Article Type
- Article
- Citation
- IEEE MICROWAVE AND GUIDED WAVE LETTERS, vol. 9, no. 10, page. 419 - 421, 1999-10
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