In this paper, we present a monolithic microwave-integrated circuit (MMIC) asymmetric Doherty power amplifier (ADPA) using 0.25$$$\mu$m gallium-nitride (GaN) process with a compact chip size of $2.9\mathrm{\text{mm}}\times 1.9\mathrm{\text{mm}}$ in wireless transmitters. Two different power amplifiers are adopted to solve the contradiction between the output power and efficiency of the conventional Doherty power amplifier (CDPA). In addition, phase compensation and low Q impedance inverting network (IIN) technology are used in the input and output matching networks, respectively, to expand the bandwidth of the entire ADPA. The post-layout simulation results show that the designed ADPA has a saturation output power 42.5$$dBm with 800$$MHz bandwidth from 6.6 to 7.4$$GHz. The ADPA demonstrates 36.8–41.8% power-added efficiency (PAE), whereas 44–54% drain efficiency (DE) is achieved at saturation power.

在本文中，我们提出了一种使用 0.25 的单片微波集成电路 (MMIC) 非对称 Doherty 功率放大器 (ADPA)$$$\mu$m 氮化镓 (GaN) 工艺，具有紧凑的芯片尺寸$2.9\mathrm{\text{毫米}}\times 1.9\mathrm{\text{毫米}}$在无线发射器中。采用两种不同的功率放大器来解决传统Doherty功率放大器（CDPA）的输出功率和效率之间的矛盾。此外，在输入和输出匹配网络中分别采用相位补偿和低Q阻抗反相网络（IIN）技术，扩展了整个ADPA的带宽。布局后仿真结果表明，所设计的 ADPA 的饱和输出功率为 42.5$$dBm 与 800$$MHz 带宽从 6.6 到 7.4$$千兆赫。ADPA 表现出 36.8-41.8% 的功率附加效率 (PAE)，而在饱和功率下可实现 44-54% 的漏极效率 (DE)。