A D-Band Wideband Low-Noise Amplifier Adopting Pseudo-Simultaneous Noise and Input Matched Dual-Peak G max-Core

This article presents a high-gain and wideband <tex-math notation="LaTeX">D</tex-math> -band low-noise amplifier (LNA) adopting a proposed wideband pseudo-simultaneous noise-and input-matched (p-SNIM) dual-peak (DP) maximum achievable gain ( <tex-math notation="LaTeX">Gₘax</tex-math> )-core. For a transmission line (TL)-based DP <tex-math notation="LaTeX">Gₘax</tex-math> -core, the p-SNIM condition is satisfied by adjusting the stability factor ( <tex-math notation="LaTeX">Kf</tex-math> ) without requiring additional components. Comprehensive analysis of the DP <tex-math notation="LaTeX">Gₘax</tex-math> -core is performed to investigate the unique behaviors of input admittance for simultaneous conjugate matching ( <tex-math notation="LaTeX">Yᵢₙ^*</tex-math> ) and optimal admittance for minimum noise figure (NF) ( <tex-math notation="LaTeX">Yₙₒₚₜ</tex-math> ) as a function of <tex-math notation="LaTeX">Kf</tex-math> , which is fully exploited to implement the wideband p-SNIM DP <tex-math notation="LaTeX">Gₘax</tex-math> -core. Moreover, we present the design procedure of a proposed dual-frequency inter-stage matching network that enables the wideband multistage LNA implementation. Implemented in a 40-nm CMOS technology, the <tex-math notation="LaTeX">D</tex-math> -band three-stage LNA achieves a peak power gain of 16.3 dB, a 3-dB bandwidth of 24 GHz, and a minimum NF of 4.9 dB while dissipating only 16.1 mW.