Open AccessDesign of dual‐band wide‐angle RF/IR beam combiner based on impedance matching
Author(s) -
Hao Kaizi,
Li Zhuo,
Wang Xin,
Yang Suhui,
Wang Yiting,
Xu Chang,
Zhou Lang,
Gao Yanze
Publication year - 2020
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0230
Subject(s) - materials science , optics , radio frequency , multi band device , impedance matching , beam (structure) , optoelectronics , transmittance , reflection (computer programming) , electrical impedance , physics , electrical engineering , computer science , engineering , antenna (radio) , programming language
A radiofrequency (RF)/infrared (IR) beam combiner is used to combine IR signals and RF signals into a common transmission axis. In this study, a dual‐band wide‐angle RF/IR beam combiner with high RF transmission and IR reflection was proposed. Based on the impedance matching principle, the RF/IR beam combiner consisted of a high reflective IR film, an IR substrate, and two RF matching layers. Multi‐objective particle swarm algorithm was applied to optimise the relative permittivity and the thicknesses of the IR substrate and the RF matching layers. A higher than 75% RF transmittance was obtained in both 8–12 GHz and 34–36 GHz bands when the RF incident angle was varied from 30° to 62°. At the same time, the reflectance in 8–12 μm was as high as 96%. It could be used in the hardware‐in‐the‐loop simulation systems to test and evaluate the detecting and tracing performances of the RF/IR dual‐mode guidance devices.