Abstract

A bandpass low noise amplifier ((LNA), which can simultaneously operate at two different frequency bands — 2.35GHz--2.6GHz and 5GHz-6GHz,is presented in this paper.The proposed dual-band LNA can be used for the Bluetooth,HiperLAN and Wireless LAN (IEEE 802.11a)communication applications,and is designed based on IBM 0.25 µm SiGe BiCMOS technology, which has better performance comparing with silicon technology,while lower cost and better integration feasibility comparing with GaAs technology.