微波谐振单元的多频耦合调控机理及其应用研究

项目名称： 微波谐振单元的多频耦合调控机理及其应用研究

项目编号： No.61501189

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 李园春

作者单位： 华南理工大学

项目金额： 21万元

中文摘要： 通信和雷达系统的射频电路面临集成化和小型化导致的带内带外干扰和杂散问题。因此，通常在电路后端级联滤波器以消除不需要的模式。但是这种方法存在两个问题，一是难以集成化；二是不能有效利用闲频分量，效率较低。为了妥善处理射频子系统的基波和谐波谐振模式，实现微波器件的高效率和集成化，本课题重点研究不同谐振频率的耦合特性并对其加以控制(利用或消除)。我们前期研究中发现，通过耦合区间的选取，可以独立控制基波和谐波频率的耦合特性，即谐振单元的多频耦合调控。本项目以此为基础，将进一步深入研究：(1)谐振单元的基波及谐波频率的多频耦合调控机理；(2)基于多频耦合实现谐波牵引效应的有源电路(功率放大器和倍频器)的高效率设计方法；(3)基于多频耦合的无源电路设计，包括高次模工作的毫米波太赫兹滤波电路设计，以及具有高杂波抑制的射频滤波电路设计。申请人前期已经初步探讨并发表了2篇IEEE论文，具有坚实的基础。

中文关键词： 多频耦合；有源电路；射频无源电路；毫米波太赫兹电路；滤波电路

英文摘要： With the rapid development of integration and minimization of radio frequency (RF) circuits in communication and radar system, signal interference and spurious of in-band and out-of-band have become increasingly serious in wireless devices. In order to suppress the undesirable modes, a common method is to cascade filters. However, the dimensions of circuits are enlarged and the efficiency is decreased, because the undesirable modes are wasted. In order to carefully deal with fundamental and harmonic resonant modes of RF circuits., the present topic focuses on the coupling characteristics and independent control under different modes, i.e. utilization or cancellation. In our primary research, we have found that by choosing a special coupling region, the coupling characteristics of fundamental mode and harmonics resonating frequencies can be adjusted independently, which is called mutli-frequencies coupling control between microwave resonant cells. And it is useful to realize multi-functionality and integration of microwave devices. Based on the current study, we will extend our investigation further to the following regards for this project: (1) Coupling control theory of fundamental mode and harmonics resonant frequencies; (2) Design methodology of high efficiency microwave active circuits based on controllable coupling and load-pull effect, i.e. high efficiency amplifier, high-efficiency frequency multiplier and etc. (3) Design methodology of millimeter-wave and Terahertz filters designs based on high order mode, as well as highly spurious suppression RF passive circuits. The applicant has done primitive research on the topics mentioned above, and published two papers on IEEE cited publications.

英文关键词： multi-frequencies coupling;active circuits;radio frequency passive circuits;millimeter-wave and terahertz circuits;filters