摘要
本文设计了一种具有圆极化辐射特性的高性能功率放大器-天线一体化电路。通过直接优化圆极化天线的输入阻抗,使之与消除输出匹配网络的功放电路直接集成。这种无缝集成方式不仅有效减少了插入和失配损耗以及整体电路尺寸,而且提高了整体的性能。采用的圆极化天线由矩形贴片和改进的地平面组成,通过在地平面上增加垂直短截线和切割水平缝隙,增强了天线的3 dB轴比带宽。为了验证,设计、制造和测量了工作在3.4 GHz~3.6 GHz的一体化电路原型。实验结果显示,功放-圆极化天线一体化电路在工作频带内的功率附加效率(PAE)超过60%,且3 dB轴比带宽达到320 MHz(相对于3500 MHz的中心频率为9.1%)。相较于传统的级联设计,PAE提高了8.5%,3 dB轴比带宽也得以改善。
A high-performance power amplifier-antenna integrated circuit with circularly polarized radiation characteristics is designed.By directly optimizing the input impedance of the circularly polarized antenna,it is directly integrated with the power amplifier circuit without the output matching network.This seamless integration not only decreases insertion loss and mismatch loss,but also effectively reduces circuit size and improves overall performance.The circularly polarized antenna is composed of a rectangular patch and a modified ground plane.The 3 dB axial ratio bandwidth of the antenna is enhanced by adding vertical stubs and cutting horizontal slots in the ground plane.For verification,an integrated circuit prototype operating at 3.4 GHz~3.6 GHz is designed,fabricated,and measured.The experimental results show that the power-added efficiency(PAE)of the power amplifier-circularly polarized antenna integrated circuit exceeds 60%in the operating frequency band,and the 3 dB axial ratio bandwidth reaches 320 MHz(9.1%for the center frequency of 3500 MHz).Compared with the traditional cascaded design,the PAE is improved by 8.5%,and the 3 dB axial ratio bandwidth is also improved.
作者
邱俊杰
尤阳
陆云龙
黄季甫
QIU Junjie;YOU Yang;LU Yunlong;HUANG Jifu(School of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)
出处
《微波学报》
CSCD
北大核心
2024年第1期34-38,59,共6页
Journal of Microwaves
基金
国家重点研发计划(2018YFB1802100)
国家自然科学基金(62171242,61801252,U1809203,61631012)
广东省重点领域研发计划(2019B010156004)
浙江省省属高校基本科研业务费专项资金(SJLY2020001)。
关键词
功放-圆极化天线一体化
圆极化天线
功率附加效率
轴比带宽
power amplifier-circular polarization antenna integration
circularly polarized antenna
power-added efficiency
axial ratio bandwidth