Novel RF front-end design for low power UWB applications
Date of Issue2011
School of Electrical and Electronic Engineering
Centre for Integrated Circuits and Systems
The needs for short range and fine resolution communications systems has motivated researchers to replace the wire-line communications systems with ultra-wideband communications systems. The ultra-wideband radio technology introduces significant advantages for short-range communications systems. This technology operates in a wide bandwidth, which allows for gigabit data rates over short distances. Due to the low complexity of the ultra-wideband system and low transmit power, it benefits from low DC power consumption. However, with growing demands for wireless communications systems, the ultra-wideband communications systems are facing more challenging requirements. Since the ultra-wideband covers a wide range of frequency, it causes challenges in the design of building blocks, in particular receiver front-end. The scope of this dissertation is to design a novel and innovative RF front-end receiver for the ultra-wideband transceivers using CMOS technology. A T-coil network can be implemented as a high order filter for bandwidth extension. This technique is incorporated into the design of the input matching and output peaking networks of a low-noise amplifier. The intrinsic parasitic capacitances within the transistors are exploited as a part of the wideband structure to extend the bandwidth. Using the proposed topology, a wideband low-noise amplifier with a bandwidth of 3−8 GHz, a maximum gain of 16.4 dB and noise figure of 2.9 dB (min) is achieved. The total power consumption of the wideband low-noise amplifier from the 1.8 V power supply is 3.9 mW. The prototype is fabricated in 0.18 μm CMOS technology.
DRNTU::Engineering::Electrical and electronic engineering::Power electronics