Open AccessLiquid metal frequency‐reconfigurable SIW bandpass filter based on gravity field
Author(s) -
Mei Yuchao,
Liu BaoGuang,
Yi Yao,
Xu Hui,
Zhang Yerong
Publication year - 2021
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/ell2.12106
Subject(s) - band pass filter , filter (signal processing) , materials science , insertion loss , substrate (aquarium) , waveguide , electronic engineering , optoelectronics , engineering , electrical engineering , geology , oceanography
In this letter, a novel frequency‐reconfigurable substrate integrated waveguide (SIW) bandpass filter (BPF) based on gravity field is proposed. By inverting the proposed filter, the liquid metal would flow into or out of the non‐metallic via‐holes under the influence of gravity, so that the filter centre frequency can be switched from 1.76 GHz (4.54%) in state 1 to 2.02 GHz (5.94%) in state 2, and the insertion losses are maintained at 2.6 dB and 2.4 dB, respectively.