基于单片微波集成电路技术设计了一款 S波段频率可调谐滤波器芯片, 该可调谐滤波器芯片采用信道化结构, 通过选择不同通道实现宽调谐比。其中每个通道采用多级放大器与无源滤波网络级联的形式提高该滤波电路的选择性, 通过在无源滤波网络引入变容二极管实现通道频率的连续调谐, 该结构可在滤波器具备较高选择性的前提下实现宽调谐比。采用 0.25 μm GaAs赝配高电子迁移率晶体管 (PHEMT)工艺设计了一款 S波段双通道信道化可重构滤波器, 仿真结果表明, 在 0~3 V控制电压范围下, 该滤波器中心频率调谐范围为 2.5~4 GHz, 带宽变化范围为 420~650 MHz, 调谐比达到 60%, 滤波器芯片尺寸为 3 mm×3.1 mm。该设计为片上可重构射频滤波实现宽频率调谐比提供了一条技术途径。

This paper presents an introduction to the researches in microwave photonics based packages and its application, a 973 project (No. 2012CB315600), which focuses on addressing new requirements for millimeter wave (MMW) system to work with higher frequency, wider bandwidth, larger dynamic range and longer distance of signal distribution. Its key scientific problems, main research contents and objectives are briefed, and some latest achievements by the project team, including generation of linear frequency modulation wave (LFMW), tunable optoelectronic oscillator (OEO) with lower phase noise, reconfigurable filter with higher Q value, time delay line with wider frequency range, down conversion with gain, and local oscillator (LO) transmission with stable phase, are introduced briefly.