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Bandwidth and Center Frequency Reconfigurable Waveguide Filter Based on Liquid Crystal Technology

Kamrath, Fynn ; Polat, Ersin ; Matic, Stipo ; Schuster, Christian ; Miek, Daniel ; Tesmer, Henning ; Boe, Patrick ; Wang, Dongwei ; Jakoby, Rolf ; Maune, Holger ; Höft, Michael (2021)
Bandwidth and Center Frequency Reconfigurable Waveguide Filter Based on Liquid Crystal Technology.
In: IEEE Journal of Microwaves, (Early Access)
doi: 10.1109/JMW.2021.3115244
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

This paper presents for the first time a fully electronically reconfigurable waveguide filter tunable in bandwidth and center frequency based on liquid crystal (LC) technology. A continuously reconfigurable two pole bandpass filter is designed and characterized in the Ka-band at 30 \,\mathrmGHz. To be able to tune both center frequency and bandwidth independently, the resonators and coupling structures are filled with LC as tunable material. Hence, the filter’s center frequency and coupling strengths can be tuned and, furthermore, tuning with constant filter characteristic is possible. To tune the LC, a novel two-layer electrode design for waveguide structures is presented, which is simple to integrate and provides a high tuning efficiency with low insertion loss. By applying different bias configurations, the LC’s effective permittivity can be varied, and therefore, also the resonators’ electrical lengths. The presented two pole filter can adapt its center frequency from 29.8 \,\mathrmGHz\,\rm to\, 30.7 \,\mathrmGH with a maximum 3 \,\rm d bandwidth variation from 660 \,\mathrmMHz\,\rm to\, 870 \,\mathrmMH. The measurements are carried out with bias voltages up to ±250 \,\mathrmV.

Typ des Eintrags: Artikel
Erschienen: 2021
Autor(en): Kamrath, Fynn ; Polat, Ersin ; Matic, Stipo ; Schuster, Christian ; Miek, Daniel ; Tesmer, Henning ; Boe, Patrick ; Wang, Dongwei ; Jakoby, Rolf ; Maune, Holger ; Höft, Michael
Art des Eintrags: Bibliographie
Titel: Bandwidth and Center Frequency Reconfigurable Waveguide Filter Based on Liquid Crystal Technology
Sprache: Englisch
Publikationsjahr: 27 Oktober 2021
Titel der Zeitschrift, Zeitung oder Schriftenreihe: IEEE Journal of Microwaves
(Heft-)Nummer: Early Access
DOI: 10.1109/JMW.2021.3115244
Kurzbeschreibung (Abstract):

This paper presents for the first time a fully electronically reconfigurable waveguide filter tunable in bandwidth and center frequency based on liquid crystal (LC) technology. A continuously reconfigurable two pole bandpass filter is designed and characterized in the Ka-band at 30 \,\mathrmGHz. To be able to tune both center frequency and bandwidth independently, the resonators and coupling structures are filled with LC as tunable material. Hence, the filter’s center frequency and coupling strengths can be tuned and, furthermore, tuning with constant filter characteristic is possible. To tune the LC, a novel two-layer electrode design for waveguide structures is presented, which is simple to integrate and provides a high tuning efficiency with low insertion loss. By applying different bias configurations, the LC’s effective permittivity can be varied, and therefore, also the resonators’ electrical lengths. The presented two pole filter can adapt its center frequency from 29.8 \,\mathrmGHz\,\rm to\, 30.7 \,\mathrmGH with a maximum 3 \,\rm d bandwidth variation from 660 \,\mathrmMHz\,\rm to\, 870 \,\mathrmMH. The measurements are carried out with bias voltages up to ±250 \,\mathrmV.

Freie Schlagworte: Couplings;Resonators;Resonant frequency;Tuning;Bandwidth;Inverters;Permittivity;Microwave filter;liquid crystals;millimeter wave communication;tunable circuits and devices;K-band
Fachbereich(e)/-gebiet(e): 18 Fachbereich Elektrotechnik und Informationstechnik
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP) > Mikrowellentechnik
18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Mikrowellentechnik und Photonik (IMP)
Hinterlegungsdatum: 11 Nov 2021 07:06
Letzte Änderung: 11 Nov 2021 07:06
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