Abstract: This paper proposes a 180°-90° hybrid coupler sequential rotation feed (SRF) technique for circularly polarized (CP) phased arrays with stable phase differences and high port isolation over ...
Accuracy of Invisalign® aligners in adult patients: a retrospective study of angular tooth movements
Objective: This retrospective study aimed to assess the predictability of Invisalign® aligners regarding rotational, mesio-distal and buccal-lingual tip movements. Methods: Two materials were included ...
Abstract: Several essential services, such as cellular phones, the Internet, television, navigation, weather prediction, and remote sensing, rely on satellites in low-Earth orbits, the technology for ...
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