Search

For mobile satellite communications applications such as the connected car, a scanning antenna is required. Kymeta has developed a novel, electronically scanned antenna technology achieved through the use of high-birefringence liquid crystals. Kymeta's technology is positioned for mass production by leveraging the manufacturing capabilities of the LC display industry. [ABSTRACT FROM AUTHOR]

The composite system Ba0.6Sr0.4TiO3-ZnO-B2O3 for thick film preparation has been modified via copper-fluorine codoping of BST to make it suitable for the fabrication of co-fired metal-insulator-metal (MIM) components. Based on the resulting improvement of the thick films, MIM varactors and phase shifters were produced by subsequent screen-printing of silver and BST pastes as well as co-firing. Microstructural investigations showed the compatibility of silver and BST with neither chemical reaction nor cracking of the layers. The microwave characterization revealed good results regarding tunability and quality factor of the varactors and high figure of merit of 70°/ dB at 1.72 GHz for the phase shifter. [ABSTRACT FROM AUTHOR]

BST-ZnO-B2O3-composite thick films have been investigated regarding their suitability as low-temperature sintered tunable microwave dielectrics. The investigations showed that already a small amount of ZnO-B2O3 additive can remarkably reduce the sintering temperature down to 900°C. Microstructural investigations of the thick films revealed the formation of an amorphous intergranular phase and a clustering of particles for high additive amounts. The microwave characterization showed a reduction in relative permittivity, dielectric loss, and tunability of the thick films with increasing additive content. These results demonstrate the potential to tailor the material abilities by varying the additive content. [ABSTRACT FROM AUTHOR]

This paper is focused on the study and applications of tunable composite right/left handed transmission lines (CRLH TL) based on open resonators. Specifically, it will be demonstrated that CRLH TL based on open split ring resonators (OSRRs) and open complementary split ring resonators (OCSRRs) can be tuned by means of barium-strontium-titanate thick-films. These artificial lines are applied to the design of tunable band-pass filters, phase shifters, dual-band impedance inverters and dual-band power dividers, where independent or simultaneous tuning of different resonators can be considered, depending on the application. The design methodology and different proof-of-concept demonstrators are reported. [ABSTRACT FROM AUTHOR]