Open AccessLiquid crystal based low‐loss phase shifter for W‐band frequencies
Author(s) -
Jost M.,
Weickhmann C.,
Strunck S.,
Gäbler A.,
Fritzsch C.,
Jakoby R.
Publication year - 2013
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.2013.2830
Subject(s) - phase shift module , insertion loss , materials science , phase (matter) , differential phase , figure of merit , liquid crystal , optoelectronics , optics , electrical engineering , physics , engineering , quantum mechanics
A novel liquid crystal (LC) based hollow waveguide phase shifter with an LC section of 14.6 mm is presented, operating at 80–110 GHz. As a proof‐of‐concept, the phase shifter is biased by using permanent magnets, which results in a differential phase shift of 307°–318° and an insertion loss of 2.1–2.7 dB in the desired frequency range of 99–105 GHz. Hence, a phase shifter figure of merit of 118°–148°/dB is determined, which are to the authors’ knowledge the highest values in this frequency range for passive phase shifters.