A Compact 2.45/5.5-GHz Dual-Band LNA Design Using Bridged-T Coils

in this paper, a compact 2.45/5.5-GHz dual-band low-noise amplifier (LNA) is proposed, which is realized through the heterogeneous integration of the $0.18-\mu \mathrm{m}$ cmos and the integrated passive device (IPD) technologies. the proposed dual-band lna employs bridged-t coils for input and output matching network designs, such that the desired dual-band response can be easily achieved. specifically, the measured small-signal gain is 15.6/12.1 dB at 2.45/5.5 GHz, while the measured noise figure is 2.6/2.8 dB. good linearity is also achieved and the measured input $\mathrm{p}_{1 \mathrm{~dB}}$ is −18/−14 dBm at 2.45/5.5 ghz.