An improved 860–960 MHz fully integrated CMOS power amplifier designation for UHF RFID transmitter

Authors:  Yuxiang Tu, Xiaorong Guo, Chunhua Wang, Jie Jin, Sichun Du, Jingru Sun

Abstract:
An improved design of 860–960 MHz fully integrated CMOS power amplifier (PA) for UHF RFID transmitter is presented in this paper. It utilizes three stage differential structure, including common-source structure applying RC feedback circuit to improve linearity, cascade structure adopting self-biased cascode technique and self-forward-body-bias (SFBB)technique to overcome shortcomings of low breakdown voltage and to reduce supply voltage respectively in order to obtain high output power, high efficiency and low supply voltage. By integrating these techniques organically, simulation results demonstrate that the circuit provides 21 dBm output power and 35% power-added efficiency (PAE) with 3V supply. A comparison with other PAs operating in similar frequencies shows the proposed LNA has advantages of higher output power, higher PAE, higher linearity and lower supply voltage.

Keywords:
RFID
Fully integrated power amplifier
Self-biased
Self-forward-body-bias (SFBB) technique
RC feedback

Published in: AEÜ-International Journal of Electronics and Communications (Volume 67, Issue 7, July  2013)

Publisher: Elsevier

ISSN Information: 1434-8411

An improved 860–960 MHz fully integrated CMOS power amplifier designation for UHF RFID transmitter

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