Coplanar Gap Plasmon Isolator Used as Microwave Antennas
Year: 2026
Type: conference-paper
Abstract: This paper investigates the electromagnetic radiation characteristics of a plasmonic gap coplanar isolator structure, revealing its potential to operate as an antenna with a reconfigurable radiation pattern. A coplanar waveguide (CPW)-ferrite configuration is proposed, which not only fulfills the function of a plasmonic gap coplanar isolator but can also be excited to radiate a reconfigurable pattern, as demonstrated through simulations performed with HFSS. Key antenna parameters-including radiation pattern, gain, and polarization-are analyzed to assess the suitability of the component for antenna applications. Simulation results exhibit directional radiation patterns in the azimuthal planes corresponding to phi = 0°, 90°, 180°, and 270°. The gain varies between 7.8 and 8.2 dB at 20 GHz as a function of the applied static magnetic bias field H0, which is successively set to$\mathbf{1 6 0 ~ k A} / \mathbf{m}, \mathbf{1 8 0}$kA/m, 200 kA/m, and 240 kA/m. At the operating frequency of 10 GHz, each configuration achieves a maximum gain with a half-power beamwidth of approximately 30°, and these main beams are rotated by 90° relative to one another. The proposed structure thereby enables pattern diversity while maintaining very good gain levels, reaching up to 20 dB at the origin of the reference plane. This functional duality-operating as both an isolator and an antenna-opens promising perspectives for the development of compact, multifunctional telecommunications systems.
Language: English
Topic: Antenna Design and Analysis
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7204126275