24.2 A Reconfigurable Series/Parallel Quadrature-Coupler-Based Doherty PA in CMOS SOI with VSWR Resilient Linearity and Back-Off PAE for 5G MIMO Arrays
Naga Sasikanth Mannem, Min-Yu Huang, Tzu-Yuan Huang, Sensen Li, Hua Wang
Abstract
Modern mm-wave 5G links rely extensively on phased arrays to achieve high array gain for sufficient coverage. However, the proximity of antenna elements often results in element-to-element coupling, which leads to significant element-level antenna-impedance mismatches (i.e., poor VSWR), depending on element locations and beamforming settings. Such array VSWR, often rapidly changing due to fast beamforming, severely degrades mm-wave front-ends, reduces scan-angles, and renders DPD ineffective or intractable [1]-[3].
Topics & Concepts
Standing wave ratioBeamformingLinearityAntenna (radio)Electronic engineeringElectrical impedanceMIMOCMOSElectrical engineeringComputer scienceAcousticsEngineeringPhysicsMicrostrip antennaMicrowave Engineering and WaveguidesAdvanced Power Amplifier DesignRadio Frequency Integrated Circuit Design