Liquid crystal based low-loss phase shifter for W-band frequencies

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–...

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Bibliographic Details
Published in:Electronics letters 2013-11, Vol.49 (23), p.1460-1462
Main Authors: Jost, M, Weickhmann, C, Strunck, S, Gäbler, A, Fritzsch, C, O.H. Karabey, Jakoby, R
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Figure of merit
frequency 80 GHz to 110 GHz
LC based hollow waveguide phase shifter
liquid crystal based low loss phase shifter
liquid crystal devices
loss 2.1 dB to 2.7 dB
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwave technology
millimetre wave phase shifters
passive phase shifters
permanent magnets
waveguide components
W‐band frequency
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Description
Summary: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.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2013.2830