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High-Performance Magnetoinductive Directional Filters

Optical and Semiconductor Devices Group, EEE Department, Imperial College London, Exhibition Road, London SW7 2AZ, UK
Author to whom correspondence should be addressed.
Academic Editors: Naser Ojaroudi Parchin, Mohammad Ojaroudi and Raed A. Abd-Alhameed
Electronics 2022, 11(6), 845;
Received: 28 January 2022 / Revised: 24 February 2022 / Accepted: 4 March 2022 / Published: 8 March 2022
(This article belongs to the Special Issue Metamaterials and Metasurfaces)
Multiport magnetoinductive (MI) devices with directional filter properties are presented. Design equations are developed and solved using wave analysis and dispersion theory, and it is shown that high-performance directional filters can be realised for use both in MI systems with complex, frequency-dependent impedance and in conventional systems with real impedance. Wave analysis is used to reduce the complexity of circuit equations. High-performance MI structures combining directional and infinite rejection filtering are demonstrated, as well as multiple-passband high-rejection filtering. A new method for improving filtering performance through multipath loss compensation is described. Methods for constructing tuneable devices using toroidal ferrite-cored transformers are proposed and demonstrated, and experimental results for tuneable MI directional filters are shown to agree with theoretical models. Limitations are explored, and power handling sufficient for HF RFID applications is demonstrated, despite the use of ferrite materials. View Full-Text
Keywords: directional filter; infinite rejection; magnetoinductive waveguide; metamaterial directional filter; infinite rejection; magnetoinductive waveguide; metamaterial
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MDPI and ACS Style

Voronov, A.; Syms, R.R.A.; Sydoruk, O. High-Performance Magnetoinductive Directional Filters. Electronics 2022, 11, 845.

AMA Style

Voronov A, Syms RRA, Sydoruk O. High-Performance Magnetoinductive Directional Filters. Electronics. 2022; 11(6):845.

Chicago/Turabian Style

Voronov, Artem, Richard R.A. Syms, and Oleksiy Sydoruk. 2022. "High-Performance Magnetoinductive Directional Filters" Electronics 11, no. 6: 845.

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