Triple Band Low Noise Amplifier Design for Wireless Applications

Abstract

In this paper, a triple band low noise amplifier (TB-LNA) is presented based on using of multi-section impedance transformer as matching circuit at its input and a single stub matching technique at its output. The designed amplifier covering (S-band) at 2.4 GHz, (C-band) at 7.5 GHz and (X-band) at 9.5 GHz. Power Added Efficiency is improved with reduction of power dissipation by applying Class-F amplifier configuration. Low Noise (ATF-34143) PHEMT has been employed for this design. RT Duriode 5880 substrate with dielectric constant $\varepsilon \mathrm{r}=2.2$, height $\mathrm{h}=31$ mil and tangent loss $\tan 6=0.0009$ is used. proposed TB-LNA was designed and analyzed over the desired bands by Advanced Design System. The TB-LNA achieves return lossS11 = −24.81dB, −15.3dB, and −25.5 dB, and provides gain of 14.53 dB, 5.39 dB and 3.18 dB with low noise figure of 0.474 dB, 2.541 dB and 7.072 dB, with Maximum (PAE) of 47 %, 21.8%, and 17.2% at frequencies F=2.4GHz,7.5GHz and 9.5GHz, respectively compared with another multi-band low noise amplifiers.