Design And Implementation Of High Power UE B41

4G LTE is in general an UL constrained technology mainly due to differences on Tx powers between DL and UL,number of antennas deployed in eNB versus UEs,and other technological aspects of the technology^[1].To that end,TDD LTE Band 41coverage is UL limited as indicated in TR 36.824.Link budget analysis indicates a delta of up to⁵dB between DL and UL,depending on network deployment parameters.Therefore,increasing UL Tx power on UE side would reduce the link budget differences between DL and UL,hence increasing TDD LTE band 41 coverage,which results in significant network deployment savings.RF simulation tool evaluation shows up to³0%increase in TDD LTE Band 41 coverage area from 3d B increase in UL Tx power.Therefore,it is important/critical to pursue means to improve UL transmit power.In December 2016,the Tx power standard increase of Band41 by 3d B was officially certified by 3GPP.HPUE?High Power UE?technology research is developing at high-speed.The thesis analyzed and researched design and implementation of B41HPUE in detail,and designed a mobile phone terminal based on the qualcomm platform which supports HPUE B41.The mobile terminal innovatively uses a Boost&Buck circuit to power RF power amplifier,increasing PA linear power output.For reducing RF front-end line loss,lower insertion loss BAW?Bulk Acoustic Wave?was introduced.And by using CST+ADS simulation,impedance matching of RF front-end is quickly optimized to ensure maximum linear output power of the RF power amplifier and minimum RF front-end line loss.This series of innovative applications makes HPUE B41 power increase by 3dB.The design and implementation of HPUE B41 has a certain reference function for other band design and RF design in other fields.