Microwave Magnetic Materials and Devices

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Applications of Magnetism and Magnetic Materials".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 1555

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College of Physics, Qingdao University, Qingdao 266071, China
Interests: magnetoresistance biosensors
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Special Issue Information

Dear Colleagues,

The performance of microwave devices mainly depends on the properties of materials used in fabrication. Knowledge of material properties at microwave frequencies is a prerequisite to select suitable materials for various microwave applications and vice versa. Magnetic materials are one of most important categories of materials which are applied in a microwave regime. Bulk and nanomagnetic materials offer predominant applications in the soft and hard magnetic industries. Several microwave devices are being developed based on some magnetic parameters, such as magnetic permeability, magnetic loss, magnetization, coercivity, retentivity, etc. This Special Issue is aimed at the origin of magnetism and magnetic materials. In particular, this includes device applications such as microwave devices and magnetoresistance biosensors, etc. We expect all your research and reviews from areas of magnetism, physics, chemistry, materials science, especially interdisciplinary research combining different fields. Other related studies not mentioned above are also welcome.

Prof. Dr. Shandong Li
Guest Editor

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10 pages, 2755 KiB  
Article
Bandwidth Enhancement of a Mobile Phone Antenna Using Ferrite Slab
by Peng Li, Wei-Hua Zong, Zhejun Jin, Zhiqun Yang, Xiaoyun Qu and Shandong Li
Magnetochemistry 2022, 8(11), 141; https://doi.org/10.3390/magnetochemistry8110141 - 26 Oct 2022
Viewed by 1154
Abstract
A novel technique to enhance the bandwidth of mobile phone antennas using YIG ferrite is proposed. The technique is applied in two slot antennas which are the proposed antenna and the reference antenna. The two antennas have the same shaped slot consisting of [...] Read more.
A novel technique to enhance the bandwidth of mobile phone antennas using YIG ferrite is proposed. The technique is applied in two slot antennas which are the proposed antenna and the reference antenna. The two antennas have the same shaped slot consisting of a rectangle connected to a circle etched on the ground plane. A ferrite slab is attached at the region near the circular slot on the ground plane of each antenna. The measured bandwidth of the proposed antenna with ferrite slab is enhanced to 0.669–1.533 and 1.69–5 GHz compared with the bandwidth of 0.81–1.44 and 2.3–5 GHz for the antenna without ferrite. The bandwidth of the reference antenna with ferrite slab is enhanced to 0.715–5 GHz compared with the bandwidth of 0.813–1.01, 1.11–1.3 and 2.33–5 GHz for the antenna without ferrite loading. The technique has the virtues of easy fabrication and low cost. Full article
(This article belongs to the Special Issue Microwave Magnetic Materials and Devices)
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