DocumentCode
3461237
Title
A varactor diode based predistortion circuit
Author
Gupta, Navin ; Tombak, Ali ; Mortazawi, Amir
Author_Institution
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., USA
Volume
2
fYear
2004
fDate
6-11 June 2004
Firstpage
689
Abstract
Operation and performance of a varactor diode based linearizer is investigated. This novel predistortion topology employs a series resonant circuit with a reverse biased varactor diode acting as a power dependant capacitor. The linearizer itself is both simulated and tested to display its nonlinear properties. In addition, a 1.8 GHz power amplifier is linearized based on this technique. An improvement of 11 dB in ACPR and an increase in 1.8 dB for the compression point is measured for the linearized PA.
Keywords
distortion; linearisation techniques; power amplifiers; power capacitors; varactors; 1.8 GHz; 1.8 dB; 11 dB; adjacent channel power ratio; compression point; linearized power amplifier; nonlinear properties; power dependant capacitor; predistortion circuit; reverse biased varactor diode; series resonant circuit; Circuit simulation; Circuit testing; Circuit topology; Diodes; Displays; Power amplifiers; Power capacitors; Predistortion; RLC circuits; Varactors;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest, 2004 IEEE MTT-S International
ISSN
0149-645X
Print_ISBN
0-7803-8331-1
Type
conf
DOI
10.1109/MWSYM.2004.1336082
Filename
1336082
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