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J Electromagn Eng Sci > Volume 7(3); 2007 > Article
Journal of the Korean Institute of Electromagnetic and Science 2007;7(3):103-108.
DOI: https://doi.org/10.5515/JKIEES.2007.7.3.103   
A Low-Power 2.4 GHz CMOS RF Front-End with Temperature Compensation
Yong-Il Kwon1, Sang-Woon Jung2, Hai-Young Lee2
1SAMSUNG Electro-Mechanics, Central R&D Institute
2Department of Electronics Engineering, Ajou University
Abstract
In this paper, a low-power 2.4 GHz front-end for sensor network application (IEEE 802.15.4 LR-WPAN) is designed in a 0.18 um CMOS process. A power supply circuit with a novel temperature-compensation scheme is presented. The simulation and measurement results show that the front-end (LNA, Mixer) can achieve a voltage gain of 35.3 dB and a noise figure(NF) of 3.1 dB while consuming 5.04 mW (LNA: 2.16 mW, Mixer: 2.88 mW) of power at $27^{circ}C$. The NF includes the loss of BALUN and BPF. The low-IF architecture is used. The voltage gain, noise figure and third-order intercept point (IIP3) variations over -45$^{circ}C$ to 85$^{circ}C$ are less than 0.2 dB, 0.25 dB and 1.5 dB, respectively.
Key words: Front-End, Temperature Compensation
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