CAJ | 학술논문

开关类功率放大器相对于传统的线性功率放大器有更高的效率，其中E类开关功率放大器由于其高效、易于实现等特点被广泛运用，但在低频率时E类功率放大器难以达到足够的输出功率和效率。设计实现的多频段开关功率放大器在高频段（433 MHz）采用E类匹配方式，在较低的频段（315 MHz、230 MHz）采用新颖的方波匹配。在Cadence软件平台下进行仿真及版图绘制，结果显示该多频段开关功率放大器各频段都实现了20 dBm的输出功率，漏极效率均达到40%，同时，通过控制晶体管尺寸，可以对输出功率进行数字控制。
개관류공솔방대기상대우전통적선성공솔방대기유경고적효솔，기중E류개관공솔방대기유우기고효、역우실현등특점피엄범운용，단재저빈솔시E류공솔방대기난이체도족구적수출공솔화효솔。설계실현적다빈단개관공솔방대기재고빈단（433 MHz）채용E류필배방식，재교저적빈단（315 MHz、230 MHz）채용신영적방파필배。재Cadence연건평태하진행방진급판도회제，결과현시해다빈단개관공솔방대기각빈단도실현료20 dBm적수출공솔，루겁효솔균체도40%，동시，통과공제정체관척촌，가이대수출공솔진행수자공제。
Switching power amplifier has higher efficiency than the traditional linear power amplifier. Class-E power amplifier is widely used because of its relatively higher efficiency and easier implementation, but it cannot achieve adequate output power and efficiency at low frequency. Class-E type matching is utilized at higher band(433 MHz)while the ampli-fier is matched in a novel square wave way at lower(315 MHz, 230 MHz)band. The simulation and layout are based on Cadence software, the designed amplifier can achieve 20 dBm output power with 40% drain efficiency over the entire bands using the same on-chip circuits. At the same time, the output power can be digitally controlled by changing the width of the output transistor.