Polat, Ersin ; Kamrath, Fynn ; Matic, Stipo ; Tesmer, Henning ; Jiménez-Sáez, Alejandro ; Wang, Dongwei ; Maune, Holger ; Höft, Michael ; Jakoby, Rolf (2022)
Novel Hybrid Electric/Magnetic Bias Concept for Tunable Liquid Crystal Based Filter.
In: IEEE Journal of Microwaves, 2 (3)
doi: 10.1109/JMW.2022.3180227
Article, Bibliographie
Abstract
This paper presents a novel hybrid bias concept for liquid crystal (LC) filter by using simultaneously electric and magnetic bias fields. It enables continuous tuning with a simplified electrode design, decreased number of electrodes and reduced bias voltage. Furthermore, the tuning efficiency is increased, since the homogeneous bias fields enable a full exploitation of the LC's anisotropy. To demonstrate this concept, a novel reconfigurable gap waveguide two-pole bandpass filter with tunable center frequency and coupling elements is designed at 30GHz. Liquid crystal technology is applied as tunable material, whereby tunability of the center frequency and coupling elements is obtained by controlling the LC's effective permittivity. The presented filter's center frequency can be tuned from 28.88GHzto29.88GHz with a maximum bias voltage of 100 V, with a return loss of 20 dB and low insertion loss of only 1.65 to 1.95 dB.
| Item Type: | Article |
|---|---|
| Erschienen: | 2022 |
| Creators: | Polat, Ersin ; Kamrath, Fynn ; Matic, Stipo ; Tesmer, Henning ; Jiménez-Sáez, Alejandro ; Wang, Dongwei ; Maune, Holger ; Höft, Michael ; Jakoby, Rolf |
| Type of entry: | Bibliographie |
| Title: | Novel Hybrid Electric/Magnetic Bias Concept for Tunable Liquid Crystal Based Filter |
| Language: | English |
| Date: | July 2022 |
| Publisher: | IEEE |
| Journal or Publication Title: | IEEE Journal of Microwaves |
| Volume of the journal: | 2 |
| Issue Number: | 3 |
| DOI: | 10.1109/JMW.2022.3180227 |
| Abstract: | This paper presents a novel hybrid bias concept for liquid crystal (LC) filter by using simultaneously electric and magnetic bias fields. It enables continuous tuning with a simplified electrode design, decreased number of electrodes and reduced bias voltage. Furthermore, the tuning efficiency is increased, since the homogeneous bias fields enable a full exploitation of the LC's anisotropy. To demonstrate this concept, a novel reconfigurable gap waveguide two-pole bandpass filter with tunable center frequency and coupling elements is designed at 30GHz. Liquid crystal technology is applied as tunable material, whereby tunability of the center frequency and coupling elements is obtained by controlling the LC's effective permittivity. The presented filter's center frequency can be tuned from 28.88GHzto29.88GHz with a maximum bias voltage of 100 V, with a return loss of 20 dB and low insertion loss of only 1.65 to 1.95 dB. |
| Divisions: | 18 Department of Electrical Engineering and Information Technology 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Microwave Engineering 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) |
| Date Deposited: | 13 Jul 2022 06:40 |
| Last Modified: | 21 Nov 2022 10:42 |
| PPN: | 501804099 |
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