High voltage high efficiency UWB pulse generator for precision localization wireless sensor network

Abstract

A high voltage, high efficiency ultra-wideband (UWB) Gaussian pulse generator for the precision localization of mobile objects in wireless sensor network system is presented. The proposed microwave monolithic integrated circuit (mmic) for the UWB pulse generator has peak output power of 25.7dBm with 0.9 mW total power consumption at 0.5 MHz pulse repetition frequency. The proposed pulse generator efficiency is 19.9%. The high output power is achieved by overcoming the breakdown phenomena of the transistor for higher output voltage by using two transistors in series. The 2µm HBT ADS model is used for the circuit simulation. The power spectrum of the generated pulse fully utilizes the FCC peak power limit spectrum mask. The generated UWB pulse is centered at 4.2 GHz with peak-to-peak voltage of 12.2 V into a 50 ohms load. The generated pulse envelop has full width at half maxima of 0.85 nsec.