Abstract: A metamaterial switch. The metamaterial switch includes a first conductive plate, a first loaded conductive plate, and a magneto-dielectric material. The first loaded conductive plate includes a second conductive plate and a first tunable impedance surface set. Each tunable impedance surface in the first tunable impedance surface set includes a respective tunable conductivity. An effective permittivity of the metamaterial switch is configured to be adjusted to a first predetermined value. The effective permittivity of the metamaterial switch is adjusted responsive to tuning a respective tunable conductivity of each respective tunable impedance surface in the first tunable impedance surface set.
Type:
Grant
Filed:
February 3, 2021
Date of Patent:
November 8, 2022
Assignee:
AMIRKABIR UNIVERSITY OF TEHRAN
Inventors:
Mehran Ahadi, Amir Jafargholi, Parviz Parvin
Abstract: A damping system for damping rotary movements of a tailing arm. The system includes a chassis, a main shaft, and a rotary damping mechanism. The rotary damping mechanism includes a first externally-threaded gear attached fixedly to the main shaft, a guide rail attached fixedly to the chassis, a linear shock absorber, an internally-threaded gear associated with the first externally-threaded gear, and a first actuator configured to decouple the first externally-threaded gear from the linear shock absorber and couple the first externally-threaded gear with the linear shock absorber.
Type:
Application
Filed:
October 22, 2019
Publication date:
February 13, 2020
Applicant:
Amirkabir University of Tehran
Inventors:
Maryam Ghassabzadeh Saryazdi, Mehrdad Daghagh, Mohammad Soltani Velashjerd