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Design and Analysis of Miniature Type Impulse Based UWB Transmitter in 90 nm CMOS for Medical Application

Ultra-wideband (UWB) has piqued interest for uses in target location, radar, and wireless communications, particularly in the medical field. The major feature that makes IR-UWB system more popular is that it does not require carrier signals always. IR-UWB can operate with narrow Gaussian monocycle pulses to represent information. In light of these benefits, this work proposes a new ultra-wide band (UWB) transmitter system based on impulses that has a low power consumption and a simple architecture. The designed transmitter is implemented using 90nm CMOS technology and simulated in Cadence tools. A voltage-controlled oscillator (VCO), a simple on-off keying (OOK) modulator, a Gaussian pulse generator, a differentiator and a differential amplifier make up the transmitter. The sketched UWB transmitter operates under a low power supply and the transmitter generates 359.44 mV output pulse swing and the pulse width of 100 ps for the Gaussian pulse. The given topology is functional and suited for usage in short-range wireless communication and medical applications due to its enhanced output voltage and low power consumption when compared to other circuits.