RESEARCH INITIATION AWARD: Quasi Optical Parameteric Electronics

9308979 York本项目将探索一种结合参数效应和准光学技术的微波和毫米波低噪声功率放大新技术。虽然参数放大器的噪声性能优于传统的晶体管放大器，但由于功率处理能力有限，对高频泵浦强信号的要求以及敏感的电路设计，参数放大器在现代微波系统中并没有得到充分利用。其中一些问题可以通过同步操作低功率参数器件的大型平面阵列来解决，输入和输出信号通过简单的天线耦合到自由空间中的传播波束。从类似的参量激光系统中也有证据表明，利用参量系统固有的相敏放大（压缩态）可以进一步降低噪声系数。本项目将探讨两种阵列负阻参数放大器和频率上变频器。在前一种情况下，自发参数振荡也是可能的，并且可以为次谐波和谐波的产生提供有用的技术。

9308979 York This project will explore a new technology for low noise power amplification in the microwave and millimeter wave regime using a combination of parametric effects and quasi optical techniques. Although parametric amplifiers have long been known to posses superior noise properties to conventional transistor amplifiers, they have not been fully utilized in modern microwave systems due to limited power handling capacity, requirement of a strong high frequency pump signal, and sensitive circuit design. Some of these problems can be circumvented by operating a large planar array of low power parametric devices synchronously, with input and output signals coupled through simple antennas to propagating beams in free space. There is also evidence from analogous parametric laser systems that noise figure can be reduced further by exploiting the inherent phase sensitive amplification of parametric systems (squeezed states). Two types of arrays negative resistance parametric amplifiers, and frequency upconverters will be explored during this project. In the former case, spontaneous parametric oscillation is also possible and could provide a useful technique for sub harmonic and harmonic generation.