Open Access3D printed waveguide step‐twist with bandpass filtering functionality
Author(s) -
Zhang Yi,
Zhang Fan,
Gao Yang,
Xu Jun,
Guo Cheng,
Shang Xiaobang
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.4263
Subject(s) - band pass filter , insertion loss , stereolithography , twist , return loss , passband , waveguide , materials science , waveguide filter , bandwidth (computing) , miniaturization , optics , optoelectronics , electronic engineering , prototype filter , computer science , physics , low pass filter , engineering , telecommunications , antenna (radio) , mathematics , geometry , composite material , nanotechnology
A novel waveguide step‐twist integrated with a bandpass filter is presented in this Letter. The twist is composed of four equally rotated cavities to achieve polarisation rotation and filtering functionalities simultaneously. Such step‐twist can achieve a significant reduction in size and weight. The design is demonstrated at Ka‐band using waveguide technology and is fabricated using a stereolithography apparatus 3D printing together with metal plating. The device is designed to have a centre frequency of 32 GHz and a bandwidth of 1 GHz. The measured result shows good agreement with simulations, with a measured average insertion loss of 0.84 dB and a return loss better than 15 dB across the passband.