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
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
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24.2 CMOS SOI 中基于可重构串联/并联正交耦合器的 Doherty PA，具有 VSWR 弹性线性度和用于 5G MIMO 阵列的回退 PAE
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Hua Wang
中科院分区：
文献类型：
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作者：
M. N. Sasikanth;Min;Tzu;Sensen Li;Hua Wang
现代毫米波5G链路广泛依赖相控阵来实现高阵列增益以实现足够的覆盖。然而，天线元件的接近通常导致元件到元件耦合，这导致显著的元件级天线阻抗失配（即，差的VSWR），这取决于元件位置和波束成形设置。这种阵列VSWR通常由于快速波束形成而快速变化，严重降低了毫米波前端，减小了扫描角度，并使DPD无效或难以处理[1]-[3]。
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].