A Low-Power 2.4GHz CMOS RF Receiver with Temperature Compensation

Abstract

In this paper, a low power 2.4GHz front-end for sensor network application (IEEE 802.15.4 LR-WPAN) is designed with 0.18um CMOS process. A power supply circuit with novel temperature compensation scheme is presented. The simulation and measurement result shows that the front-end (LNA, Mixer) can achieve 35.3dB voltage gain and 3.1dB Noise Figure with 2.16mW power consumption at 27°C. NF included the loss of BALUN and BPF. The voltage gain, noise figure and third order intercept point(IIP3) variations over -45°C to 85°C are less than 0.2dB, 0.25dB and 1.5dB respectively.

A 2.4GHz CMOS front-end having improved antenna isolation for diversity

“…The gain is programmable between 25 dB and 11 dB. The NF is 1.5dB in the high-gain mode [3]. In order to reduce the loss of switches, the width of transistor is chosen large enough therefore, the LNA size including switches is too big.…”

“…The quadrature architecture reduced LO leakage and LO self-mixing. The gain is programmable between 9.5dB and -10dB [3].…”