A frequency‐selective surface consisting of three arrays of ring elements is analyzed. It is shown that broad transmission and reflection bands can be generated with separation ratios of less than 1.03:1. Measurements confirm that the diplexer performance is relatively insensitive to the angle and plane of incidence. © 1995 John Wiley & Sons. Inc.
- Frequency‐selective surfaces
- quasioptical filters
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering