Abstract
With the rapid development of ultra-wideband communications, the design requirements of CMOS radio frequency integrated circuits have become increasingly high. Ultra-wideband (UWB) low noise amplifiers are a key component of the receiver front end. The paper designs a high power gain (S<sub>21</sub>) and low noise figure (NF) common gate (CG) CMOS UWB low noise amplifier (LNA) with an operating frequency range between 3.1 GHz and 10.6 GHz. The circuit is designed by TSMC 0.13 μm RF CMOS technology. In order to achieve high gain and flat gain as well as low noise figure, the circuit uses many technologies. To improve the input impedance matching at low frequencies, the circuit uses the proposed T-match input network. To decrease the total dissipation, the circuit employs current reused technique. The circuit uses he noise cancelling technique to decreases the NF. The simulation results show a flat S<sub>21</sub>>20.81 dB, the reverse isolation (S<sub>12</sub>) less than -48.929 dB, NF less than 2.617 dB, the minimum noise figure (NF<sub>min</sub>)=1.721 dB, the input return loss (S11) and output return loss (S<sub>22</sub>) are both less than -14.933 dB over the frequency range of 3.1 GHz to 10.6 GHz. The proposed UWB LNA consumes 1.548 mW without buffer from a 1.2 V power supply.
Highlights
The Federal Communication Commission (FCC) has approved 3.1-10.6 GHz bandwidth for commercial use in 2002, due to its low power consumption, fast transmission speed and high security [Rastegar, Saryazdi and Hakimi (2013); Lin, Hsu, Jin et al (2007)]
The increasing demands for portable wireless devices are driving the development of CMOS Radio Frequency Integrated Circuits (RFICs) that require low power dissipation to maximize battery lifetime [Rastegar, Saryazdi and Hakimi (2013)]
The total noise figure (NF) of low noise amplifier (LNA) is dominated by the NF of the M1 in Fig. 1, so the noise of M1 will be cancelled by the cancelling technology
Summary
The Federal Communication Commission (FCC) has approved 3.1-10.6 GHz bandwidth for commercial use in 2002, due to its low power consumption, fast transmission speed and high security [Rastegar, Saryazdi and Hakimi (2013); Lin, Hsu, Jin et al (2007)]. There are many things to consider when designing an UWB LNA, such as a high enough and flat gain, as low as possible and flat noise figure, good input and output return loss, low power consumption and other requirements over the entire operating frequency range of the UWB LNA. A High Gain, Noise Cancelling 3.1-10.6 GHz CMOS LNA [KeHou, JianHao, BoJiun et al (2007)], and current reused amplifiers [Lin, Hsu, Jin et al (2007); Khurram and Hasan (2011)]. Distributed amplifiers can improve gain at higher frequencies, extending bandwidth It requires more inductors, so the amplifier is designed to be costly and consumes a lot of power, which limits its range of use. The current reused techniques are very useful for high gain and low power consumption of the amplifier.
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