⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出一种用于发射波束成形的多相插值数字功率放大器，通过数字域相位和幅度独立控制实现波束指向调节。该设计采用65nm CMOS工艺，旨在解决传统模拟方案中功耗与面积效率低的问题。
Future 5G communications will heavily leverage beamforming and MIMO techniques, owing to the improvement in data transmission capacity. In a transmit (TX) beamformer, the phase and amplitude of an array of TXs can be arbitrarily adjusted to spatially steer a transmitted beam toward a user or multiple users. The amplitude and direction of the beam is adjusted by controlling the gain and phase of each TX in the array. Gain is typically adjusted with a variable-gain amplifier in the driver chain. In recent beamforming TXs, four primary means to control the output beam angle have been leveraged. Passive RF phase shifting is bulky and lossy, owing to high losses in the passive elements, and is difficult to design to provide phase control through 360°. LO phase shifting often uses a single passive phase shifter or a multiphase ring oscillator, but these devices typically provide lower phase resolution. Digitally controlled delay lines provide a
Zhidong Bai, Wen Yuan, Ali Azam, Jeffrey Sean Walling
University of Utah, Salt Lake City, UT