金属共振栅网亚毫米波带通滤波器的研制

Study of Metallic Resonant Grid SMMW Bandpass Filters

制备了几组几何参数不同的金属共振栅网;研究了共振波长在55～90μm 范围内,其滤波特性与其几何参数的关系;总结出两条可供滤波器设计使用的经验公式.还制备了一组由两片共振栅网组成的干涉滤波器,它们具有良好的滤波特性,是一种优质实用的亚毫米波带通滤波器.

A series of cross-shaped resonant grids,the resonant wavelengths of whichwere in the region of 55—90 um,have been constructed and the dependence of thespectral characteristics on the grid geometric parameters has been investigatedexperimentally in detail.Two empirical expressions which are useful for desig-ning the resonant grid have been found.Resonant interference filters which co-nsist of two resonant grids have been constructed either.The results show thattheir transmission in the pass-band and the rejection in the rejective-band arevery good and the interference filter is an excellent and practical bandpassSMMW filter.