A low‐power 3.2–9.7 GHz ultra‐wideband low‐noise amplifier with excellent stop‐band rejection using 0.18‐μm CMOS technology

Abstract

A low‐power 3.2–9.7 GHz low‐noise amplifier (LNA) with excellent stop‐band rejection by 0.18‐μm CMOS technology is demonstrated.High stop‐band rejection is achieved using a planar passive band‐pass filter with three finite transmission zeros (in the input terminal of the common‐gate LNA), one of which (ωz1 = 0.9 GHz) is in the low‐frequency stop‐band and the other two (ωz3 and ωz5) are in the high‐frequency stop‐band. In addition, an active notch filter is used in the output terminal of the LNA to introduce another low‐frequency stop‐band transmission zero (ωz2) at 2.4 GHz. The LNA consumes 4.68 mW and achieves S11 of −10 to −39.5 dB, S21 of 9.3 ± 1.5 dB, and an average noise figure (NF) of 6 dB over the 3.2–9.7 GHz band. Moreover, the stop‐band interferers can be effectively attenuated. The measured stop‐band rejection is better than 21.6 dB for frequencies DC ∼2.5 GHz and 11.2–20 GHz. The corresponding stop‐band rejection at 0.9, 1.8, 2.4, 17.6, and 19.5 GHz are 53.3, 26.4, 26.5, 60, and 59.5 dB, respectively. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1253–1261, 2012

Only Ku-band microwave absorption by Fe3O4/ferrocenyl-CuPc hybrid nanospheres

“…3(a), it can be seen that the resonant behavior of the permittivity can be found around in Ku-band (12.0-18.0 GHz). The real part of the permittivity (e 0 ) remains stable from 0.5 to 12.0 GHz and has two resonant peaks in 12.0-18.0 GHz, and four resonant peaks of the imaginary part of permittivity (e 00 ) can be found nearby, which presents the typical characteristics of nonlinear dielectric resonance [31]. As reported in Fig.…”

“…Moreover, the minimum reflection loss of the as-prepared hybrid nanospheres from L-band to X-band is higher than À 1.5 dB. So the hybrid nanospheres have potential application in notch filter in Ku-band, which is kind of special electromagnetic shielding device and eliminates a single frequency or narrow band of frequencies [31,32].…”

High frequency of low noise amplifier architecture for WiMAX application: A review

“…A 3.2-9.7 GHz low power of LNA with good stop-band dismissal by 0.18 µm CMOS technology has been classified by [36]. A passive band-pass filter achieved rejection of the high stop-band with 3 finite transmittance zeros (at the common-gate LNA input terminal), one in the low-frequency band (ωz1= 0.9 GHz) and ωz3 and ωz5 at the high-frequencies stop-band.…”