89~183 GHz冷光学和准光学系统设计

Design of an 89~183 GHz cold optical and quasi-optical system

摘要:

根据准光和高斯波束的基本原理，对准光反射镜和透镜进行研究，设计了一套毫米波亚毫米波天线准光馈电系统，通过两条光路实现89~115 GHz、176~183 GHz两个频段同时接收电磁辐射信号。采用椭球面反射镜和透镜实现波束会聚，控制系统结构包络；通过极化栅网分离通道，对双通道指标进行计算和初步分析。该系统工作在低温环境下，针对实际需求和冷光学分析，对准光器件的空间位置和波束半径提出约束并优化。理论计算和仿真结果表明，该系统满足冷光学和准光学的设计要求。

Abstract:

Based on the fundamental principles of quasi-optical and Gaussian beams, research has been conducted on quasi-optical reflectors and lenses, leading to the design of a quasi-optical feed system for millimeter-wave and submillimeter-wave antennas. This system is capable of simultaneously receiving electromagnetic radiation signals in the 89~115 GHz and 176~183 GHz frequency bands through two optical paths. Elliptical reflectors and lenses are utilized to focus the beams and control the system's structural envelope. Polarization grid networks are employed to separate channels, and calculations and preliminary analysis of dual-channel performance are conducted. The system operates in a low-temperature environment, and in response to practical requirements and cold optical analysis, constraints are proposed and optimized for the spatial position and beam radius of quasi-optical components. Theoretical calculations and simulation results indicate that the system meets the design requirements for cold optics and quasi-optics.