This paper introduces a high gain and low power concurrent dual-band low-noise amplifier (LNA) operating in the 2.4/5.2-GHz which can be used for wireless local area network (WLAN) applications. The proposed dual-band LNA consists of a wideband LNA and notch filters. The wideband LNA employs current-reused technique to reduce power consumption and provide flat gain over wide bandwidth. By applying notch filters at the first stage output and the second stage input of the wideband LNA, the dual-band frequency response is formed. The dual-band LNA has been designed and simulated in RF-TSMC 0.18μm CMOS technology by Advanced Designed System (ADS). The power consumption is 2.25 mW in both bands with 1.8 V supply voltage. At 2.4 GHz, simulation results exhibit a noise figure (NF) of 1.8 dB, a power gain (S21) of 15.9 dB and an input return loss (S11) of -14 dB. In addition, it features a NF of 2.7 dB, a power gain of 14.3 dB and an input return loss of -12.8 dB at 5.2 GHz.