Abstract :
Abstract - Ultra-Wideband (UWB) technologies are widely
accepted as the center piece of ubiquitous wireless
interconnects for next generation Wireless Personal Area
Networks (WPAN). It finds potential exciting applications in
high-connectivity and high interoperability multimedia
consumer products within personal operating space, such as
wireless home video distributions systems, and high-speed,
high-mobility cable replacement solutions, such as Wireless
Universal Serial Bus (W-USB) and wireless IEEE-1394 Fire
wire. Many active academic and industrial works have been
dedicated to the implementation of UWB transceivers,
however, a monolithic UWB radio expanding across full 3.1–
10.6 GHz UWB spectrum is yet to be accomplished.
Targeting Multi-Band Orthogonal Frequency Division
Multiplexing (MB-OFDM) UWB, one of the two major
competing industrial UWB standards, this paper focuses on
system and circuit co-design of a fully integrated CMOS
direct-conversion Mixer with emphasis on architectural
issue, and circuit topologies of its RF front-end. In this paper,
a CMOS Ultra-wideband mixer was designed and simulated.
Specific architecture has been selected Mixer implementation
of an Ultra-wideband communication system. The basic
architecture of the Mixer maintains a gain of 15dB over the
band of 3.1-10.2GHz. The Mixer achieved a Noise figure
ranging from 9-9.5dB over the same band of operation.
