Results 251 to 260 of about 750,689 (337)

Wideband Absorbing Metasurface for Improving Axial Ratio of a Compact Archimedean Spiral Antenna

IEEE Transactions on Antennas and Propagation, 2023
A wideband absorbing metasurface is proposed to improve the circularly polarized response of a 1–18 GHz low-profile Archimedean spiral antenna. The metasurface consisting of surface-mounted resistors between metallic patches in a circular arrangement is ...
Aritra Roy   +4 more
semanticscholar   +1 more source

An Ultra-Miniaturized High Efficiency Implanted Spiral Antenna for Leadless Cardiac Pacemakers

IEEE Transactions on Biomedical Circuits and Systems, 2023
This article presents an ultra-miniaturized implant antenna with a volume of 22.22 mm$^{3}$ in the Medical Implant Communication Service (MICS) frequency band 402-405 MHz to be integrated with a leadless cardiac pacemaker.
Mehrab Ramzan   +5 more
semanticscholar   +1 more source

3-D Printed Zirconia Ceramic Archimedean Spiral Antenna: Theory and Performance in Comparison With Its Metal Counterpart

IEEE Antennas and Wireless Propagation Letters, 2022
Based on the radiation from high-permittivity dielectric waveguide and ceramic three-dimensional (3-D) printing technology, a dielectric Archimedean spiral antenna made of zirconia is proposed in this letter. Its operational mechanism and performance are
Shiyan Wang   +6 more
semanticscholar   +1 more source

A Wideband Frequency- and Polarization-Reconfigurable Liquid Metal-Based Spiral Antenna

IEEE Antennas and Wireless Propagation Letters, 2022
This letter work develops a liquid metal-based spiral antenna for frequency reconfiguration over an ultrawide band and polarization reconfiguration at a partial operating band.
Tingting Zhang, Yikai Chen, Shiwen Yang
semanticscholar   +1 more source

Performance Improvement of an Archimedean Spiral Antenna for 2–18 GHz Applications

IEEE Antennas and Wireless Propagation Letters, 2022
Low-profile wideband spiral antennas suffer from poor impedance matching and cross polarization at lower frequencies or high variation in gain at higher frequencies.
Aritra Roy   +4 more
semanticscholar   +1 more source

Design and development of a double spiral antenna with an artificial magnetic conductor structure for hyperthermia treatment

International journal of RF and microwave computer-aided engineering, 2022
A double spiral antenna with an artificial magnetic conductor (AMC) is designed, fabricated, and experimentally tested for hyperthermia treatment as a microwave power radiator.
N. Sharma   +4 more
semanticscholar   +1 more source

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