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

This article presents a high-gain and wideband
$D$
-band low-noise amplifier (LNA) adopting a proposed wideband pseudo-simultaneous noise- and input-matched (p-SNIM) dual-peak (DP) maximum achievable gain (
$G_{\text {max}}$
)-core. For a transmission line (TL)-based DP
$G_{\text {max}}$
-core, the p-SNIM condition is satisfied by adjusting the stability factor (
$K_{f}$
) without requiring additional components. Comprehensive analysis of the DP
$G_{\text {max}}$
-core is performed to investigate the unique behaviors of input admittance for simultaneous conjugate matching (
$Y_{\text {in}}^{\ast}$
) and optimal admittance for minimum noise figure (NF) (
$Y_{n\text {opt}}$
) as a function of
$K_{f}$
, which is fully exploited to implement the wideband p-SNIM DP
$G_{\text {max}}$
-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
$D$
-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.