【摘要】：本文主要研究小型化高效率Doherty功率放大器,以及GaAs工藝PHEMT器件的Ka波段高效率單片集成功率放大器。Doherty功率放大器相對(duì)其它類型高效率放大器具有:效率高、線性度好、結(jié)構(gòu)簡(jiǎn)單、成本低等優(yōu)勢(shì)。毫米波單片集成功率放大器廣泛運(yùn)用于毫米波通信系統(tǒng),尤其是在軍用電子的武器制導(dǎo)系統(tǒng)、偵查系統(tǒng)、雷達(dá)系統(tǒng)等有著至關(guān)重要的作用。本文研究高效率微波毫米波放大器,主要內(nèi)容如下:本文設(shè)計(jì)小型化的高效率Doherty放大器,對(duì)傳統(tǒng)的Doherty功率放大器進(jìn)行改進(jìn),去掉傳統(tǒng)Doherty放大器中峰值功放的四分之一波長(zhǎng)相位調(diào)整線,使用集成定向耦合器取代傳統(tǒng)Doherty功率放大器中的威爾金森功分器。定向耦合器可以自身起到移相的作用,可以去掉峰值功放1/4波長(zhǎng)相位補(bǔ)償線,達(dá)到了小型化的高效率小型化Doherty放大器的目的。使用ADS仿真軟件以及器件的模型仿真了放大器,最后對(duì)設(shè)計(jì)小型化高效率Doherty功率放大器進(jìn)行了實(shí)驗(yàn)研究,其性能指標(biāo)如下:工作頻率:2580-2610MHz,增益(G):≥14 dB;帶內(nèi)平坦度(?G):≤0.4 dB;1dB壓縮點(diǎn)功率(P1dB):≥44 dBm;功率附加效率(PAE):≥30%回退10 dB;符合目前通信基站使用的放大器的要求。此外,使用GaAs工藝PHEMT器件設(shè)計(jì)了一款運(yùn)用于Ka波段毫米波單片集成高效率功率放大器,分析了Ka波段高效率功率放大器設(shè)計(jì)的基本理論、器件選型;電路拓?fù)溥x取的原理和方法;單片集成電路的版圖的布局。本文設(shè)計(jì)的Ka波段毫米波高效率放大器指標(biāo)如下:頻率范圍:27~28 GHz;輸出P-1≥22 dBm;效率PAE≥40%;功率增益Gain≥30dB,增益帶內(nèi)平坦度≤±1dB;飽和功率帶內(nèi)平坦度≤±0.6 dB;芯片面積≤1.5 mm×2.3 mm。
[Abstract]:This paper focuses on miniaturization and high efficiency Doherty power amplifiers, as well as Ka-band high efficiency monolithic integrated power amplifiers. Doherty power amplifiers of GaAs process PHEMT devices have high efficiency and good linearity compared with other types of high efficiency amplifiers. Simple structure, low cost and other advantages. Millimeter-wave monolithic integrated power amplifiers are widely used in millimeter-wave communication systems, especially in military electronic weapon guidance systems, detection systems, radar systems and so on. The main contents of this paper are as follows: a miniaturized high efficiency Doherty amplifier is designed to improve the traditional Doherty power amplifier. The 1/4 wavelength phase adjustment line of the peak power amplifier in the traditional Doherty amplifier is removed and the Wilkinson splitter in the traditional Doherty power amplifier is replaced by an integrated directional coupler. The directional coupler can shift phase by itself and eliminate the peak power amplifier 1 / 4 wavelength phase compensation line to achieve the purpose of miniaturization of high efficiency miniaturized Doherty amplifier. The amplifier is simulated by ADS simulation software and device model. Finally, the design of miniaturized and high-efficiency Doherty power amplifier is studied experimentally. The performance parameters are as follows: working frequency: 2580-2610MHz, gain (G): 鈮，

本文編號(hào)：2194862