Open AccessDesign and test of a broadband rectangular waveguide TE 10 –TE 20 mode converter
Author(s) -
Xu Yong,
Wang Weijie,
Peng Tinghui,
Mao Ya,
Zheng Zhibin,
Liu Zhihang,
Luo Yong
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.1581
Subject(s) - insertion loss , return loss , broadband , converters , extremely high frequency , materials science , energy conversion efficiency , optics , waveguide , mode (computer interface) , electrical engineering , optoelectronics , physics , engineering , voltage , computer science , antenna (radio) , operating system
A broadband rectangular waveguide TE 10 –TE 20 mode converter with high mode purity and conversion efficiency is designed, fabricated and measured in this Letter. Based on the broadband characteristic of ridged twist waveguide and its characteristic of polarisation direction torsion of electromagnetic wave, this mode converter achieves broadband and high‐efficiency TE 10 –TE 20 mode conversion. Simulation results reveal that the return loss of the proposed mode converter is >20 dB and insertion loss is <0.04 dB in whole Ka‐band. Two prototype TE 20 mode converters were fabricated. Back‐to‐back millimeter‐wave measurements by vector network analyser were performed to verify the design. The measured performances show return loss of the proposed mode converter is >20 dB and insertion loss is <0.1 dB in whole Ka‐band, the corresponding mode conversion efficiency is >97.7%.