Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-35268 Beitrag zu einem Tagungsband Jost, M.; Strunck, S.; Heunisch, Andreas; Wiens, A.; Prasetiadi, A.E.; Weickhmann, C.; Schulz, Bärbel; Quibeldey, M.; Karabey, O.H.; Rabe, Torsten; Follmann, R.; Koether, D.; Jakoby, R. Continuously tuneable liquid crystal based stripline phase shifter realised in LTCC technology This work presents the design, fabrication and measurements of a low temperature cofired ceramic (LTCC) integrated liquid crystal (LC) phase shifter. The effective permittivity of the phase shifter and therefore its differential phase shift can be tuned continuously by orienting the LC directors with electric fields. The phase-shift demonstrator is designed for Ka-band frequencies around 30 GHz and represents a stripline filled with LC, embedded inside an LTCC multilayer structure, which provides a space-qualified and hermetically-sealed LC cavity within an RF-capable material system. The total length of the device is 37 mm while the phase shifting LC section has a length of 14.6 mm. At 30 GHz it exhibits a differential phase shift of 60° with an insertion loss around 6 dB, resulting in a figure of merit around 10°/dB. An advantage is that the insertion loss is nearly independent of the tuning state of the LC. The response time of the phase shifter, depending on the desired LC orientation, is between 62 ms and 37 s. The European Microwave Association (EuMA) 2015 EuMC 2015 - 45th European microwave conference (Proceedings) 978-2-87487-039-2 EuMC 2015 - 45th European microwave conference Paris, France 07.09.2015 10.09.2015 1260 1263 2016-02-20 OPUS4-31198 Zeitschriftenartikel Strunck, S.; Gaebler, A.; Karabey, O.H.; Heunisch, Andreas; Schulz, Bärbel; Rabe, Torsten; Follmann, R.; Kassner, J.; Koether, D.; Manabe, A.; Jakoby, R. Reliability study of a tunable ka-band SIW-phase shifter based on liquid crystal in LTCC-technology A tunable substrate-integrated waveguide phase shifter using low-temperature co-fired ceramic (LTCC)-technology is presented in this paper. By changing the effective permittivity in the liquid crystal (LC)-filled waveguide, the differential phase can be tuned continuously. This is achieved by means of an analog signal applied to the electrodes, surrounding the LC. The design allows for precise tuning of the differential phase, which is proven with a Monte Carlo measurement resulting in phase errors of less than 3° at 28 GHz. Besides that, the ambient temperature dependency of the module is shown. The phase shifter has a high integration level and can be included into a complete and lightweight single-phased array antenna module. The phase shifter is realized with a high level of integration which is available through the multilayer process of the LTCC. It has a length of 50 and provides a differential phase shift of more than 360° at 28 GHz. The figure of merit for tunable phase shifters is >40°/dB. Cambridge Cambridge Univ. Press 2014 International journal of microwave and wireless technologies 1 7 10.1017/S175907871400083X 2016-02-20