In this work, a fully 3D-printed choke corrugated Gaussian profile horn antenna (GPHA) using high-conductive filaments and a low-cost modular 3D-printing technique is implemented. The choke corrugated GPHA operates in the Ka-band, with a central frequency of 28 GHz. Although the antenna can be printed in one piece as its dimensions are within the printing limits, four pieces compose the three sections of the final 3D-printed antenna. The numerical simulations and measurements of the antenna show a good agreement, validating the possibility of cost-effective modular fabrication of this complex type of antennas.
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http://dx.doi.org/10.1038/s41598-023-50174-5 | DOI Listing |
Sci Rep
December 2023
Escuela de Ingeniería Eléctrica, Pontificia Universidad Católica de Valparaíso, 2340000, Valparaiso, Chile.
In this work, a fully 3D-printed choke corrugated Gaussian profile horn antenna (GPHA) using high-conductive filaments and a low-cost modular 3D-printing technique is implemented. The choke corrugated GPHA operates in the Ka-band, with a central frequency of 28 GHz. Although the antenna can be printed in one piece as its dimensions are within the printing limits, four pieces compose the three sections of the final 3D-printed antenna.
View Article and Find Full Text PDFJ Clin Monit Comput
February 2012
Department of Anesthesiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, ML 2001, Cincinnati, OH 45209, USA.
A method of administering continuous positive airway pressure via a new airway device to prevent upper airway obstruction and preserve spontaneous respiration under total intravenous anesthesia has been adapted for children undergoing deep sedation for MRI studies. Presented herein is a retrospective study of 45 pediatric patients, ages 5 months to 7 years, who underwent an MRI study under general anesthesia using a modified nasal vestibule airway (NVA®), a pressure-sealing nasal cannula that can be used in conjunction with an anesthesia circuit to deliver nasal-CPAP during anesthesia. After inhalation induction of anesthesia with sevoflurane, an intravenous infusion of propofol was used to maintain anesthesia.
View Article and Find Full Text PDFAnesth Analg
November 2008
Department of Anesthesia and Pain Management, Mount Sinai Hospital, University of Toronto, 600 University Ave., Toronto M5G1X5, ON, Canada.
Background: A decline in emergency surgical airway procedures in recent years has resulted in a decreased exposure to cricothyrotomy. Consequently, residents have very little experience or confidence in performing this intervention. In this study, we compared cricothyrotomy skills acquired on a simple inexpensive model to those learned on a high fidelity simulator using valid evaluation instruments and testing on cadavers.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!