Class D Switching Power Amplifier with a Filter under Load Mismatch Conditions
Class D Switching Power Amplifier with a Filter under Load Mismatch Conditions
复制标题
负载失配条件下带滤波器的 D 类开关功率放大器
DOI：
10.1109/weconf48837.2020.9131508
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
V. N. Gromorushkin
中科院分区：
文献类型：
--
作者：
O. Varlamov;V. N. Gromorushkin
具有滤波器的RF推挽式开关模式功率放大器（SMPA）是用作在5G网络中运行的物联网设备的输出级的有前途的选择之一。小尺寸的物联网设备可能会导致在不匹配的天线上工作。分析了带滤波器的D类开关功率放大器在电压模式和电流模式两种工作模式下，在负载失配条件下的能量特性。在对时间图分析的基础上，写出积分方程，通过求解积分方程，导出计算公式。给出了计算结果。它表明，有效地使用推挽SMPA与滤波器的输出级的发射机是可能的负载驻波不超过1.25…1.43.
RF push-pull switching mode power amplifiers (SMPA) with a filter is one of the promising options for use as an output stage of IoT devices operating in 5G networks. Small sizes of IoT devices may cause work on a mismatched antenna. This article analyzes the energy characteristics of a Class D switching power amplifier with a filter for two configurations: voltage mode and current mode under load mismatch conditions. Based on the analysis of time diagrams, integral equations are written, the solution of which allows us to derive calculation formulas. The results of calculations are presented. It is shown that the effective use of push-pull SMPA with a filter in the output stages of the transmitters is possible with load VSWR not more than 1.25 ... 1.43.