Design and implementation of a 1–5 GHz UWB low noise amplifier in 0.18 μm CMOS

Abstract

This paper presents a compact two-stage ultrawideband low-noise amplifier (LNA). A common-gate topology is adopted for the input stage to achieve wideband input matching, while a cascode stage is used as the second stage to provide power gain at high frequencies. A low power consumption and a small chip area are obtained by optimizing the performance of the LNA with tight constraint on biasing current and reducing the number of inductors to two. The LNA has been fabricated in a standard 0.18 lm CMOS technology for experimental verification. The LNA achieves a power gain of 11-13.7 dB and a noise figure of 5.0-6.5 dB in the frequency band 1-5 GHz. The measured third order (two-tone) input intercept point (IIP3) is -9.8 dBm at 4 GHz. The LNA consumes 9 mW with a 1.8 V supply, and it occupies an area of 0.78 mm 2 .

Design and optimisation of feedforward noise cancelling complementary metal oxide semiconductor LNA for 2.4 GHz WLAN applications

“…Gain lin × BW GHz NF lin − 1 × P DC mW × Z in N (22) FoM II = 20log 10 Gain lin × BW GHz × IIP3 lin NF lin − 1 × P DC mW × Z in N (23) Z in N = 1 + S 11 1 − S 11 (24) Comparison of the proposed work with state-of-the-art-work shows that higher gain and lower NF are achieved with average power consumption, as shown in Table 7. During the pre-layout simulation, the proposed design has achieved higher FoM (29.45 and 11.05) than other works.…”

“…While considering the NF and power dissipation, stagger tuning technique is better to achieve wideband. NF is increased by the wideband impedance matching [3, 10, 11], and based on the application, impedance has to be matched at the targeted frequency to increase the signal to noise ratio. Common source (CS) configuration provides high gain, wide input matching and lower NF [12].…”

“…NF can be reduced significantly by feedforward noise cancellation technique [13]. Two‐stage LNA with CG first stage and cascoded second stage provides higher bandwidth at the cost of NF [10]; noise cancellation can be added to improve the performance of this LNA.…”

A high linearity low power low-noise amplifier designed for ultra-wide-band receivers

“…The CS structure and subsequently the CG structure are used as the well-known cascade structure to reduce the Miller effect on the main transistor and to improve the reverse isolation. A combination of these two topologies is used to improve noise and impedance matching concurrently [19].…”