JSSC 2021第12期RF & Wireless40nmPower Amplifier

A Wideband Four-Way Doherty Bits-In RF-Out CMOS Transmitter Mohammadreza Beikmir

提出一种宽带四路Doherty架构的数字发射器，采用创新的50% LO签名I/Q交错上变频技术，显著提升效率和频谱纯度。

峰值输出功率27.54 dBm，漏极效率46.35%，系统效率30.77%，工作频率5.3 GHz

宽带Doherty数字发射器CMOS正交频分复用

▸50%-LO签名I/Q交错上变频技术

▸紧凑型四路集总元件Doherty功率合成网络

▸签名二阶保持(SOH)插值滤波器

Abstract

We present a wideband, 12-bit four-way Doherty Cartesian digital transmitter (DTX) featuring an innovative 50%-LO signed I/ Q interleaved up-conversion technique that enables close to perfect orthogonal I/ Q summation. The DTX incorporates a compact four-way lumped-element Doherty power combining network to enhance its average efﬁciency at deep power back-off (DPBO). It comprises a signed second-order hold (SOH) interpolation ﬁlter to suppress the sampling spectral replicas signiﬁcantly. The pro