Ridge Gap Waveguide Based Liquid Crystal Phase Shifter

Media type: Text; E-Article

Title: Ridge Gap Waveguide Based Liquid Crystal Phase Shifter

Contributor: Nickel, Matthias [Author]; Jiménez-Sáez, Alejandro [Author]; Agrawal, Prannoy [Author]; Gadallah, Ahmed [Author]; Malignaggi, Andrea [Author]; Schuster, Christian [Author]; Reese, Roland [Author]; Tesmer, Henning [Author]; Polat, Ersin [Author]; Schumacher, Peter [Author]; Jakoby, Rolf [Author]; Kissinger, Dietmar [Author]; Maune, Holger [Author]

Published: New York, NY : IEEE, 2020

Issue: published Version

Language: English

DOI: https://doi.org/10.34657/6325; https://doi.org/10.1109/ACCESS.2020.2989547

Keywords: phased array ; bed of nails ; Liquid crystals (LC's) ; gap waveguide

Origination:

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Description: In this paper, the gap waveguide technology is examined for packaging liquid crystal (LC) in tunable microwave devices. For this purpose, a line based passive phase shifter is designed and implemented in a ridge gap waveguide (RGW) topology and filled with LC serving as functional material. The inherent direct current (DC) decoupling property of gap waveguides is used to utilize the waveguide surroundings as biasing electrodes for tuning the LC. The bed of nails structure of the RGW exhibits an E-field suppression of 76 dB in simulation, forming a completely shielded device. The phase shifter shows a maximum figure of merit (FoM) of 70 °/dB from 20 GHz to 30 GHz with a differential phase shift of 387° at 25 GHz. The insertion loss ranges from 3.5 dB to 5.5 dB depending on the applied biasing voltage of 0 V to 60 V. © 2013 IEEE.

Access State: Open Access

Rights information: Attribution (CC BY)

Ridge Gap Waveguide Based Liquid Crystal Phase Shifter - [published Version]

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