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

Full text: IJEIR-146.pdf