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Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position
- Magnetodielectric hexaferrite flake/polymer substrate for implantable antenna with an enhanced insensitivity to implant position
- Lee, SE[Lee, Sang-Eui]; Kim, HJ[Kim, Han-Joon]; Lee, JH[Lee, Jae-Ho]; Oh, KS[Oh, Kyoung-Sub]; Hahn, HT[Hahn, H. Thomas]; Choi, JW[Choi, Ji-Woong]
- DGIST Authors
- Kim, HJ[Kim, Han-Joon]; Choi, JW[Choi, Ji-Woong]
- Issue Date
- Materials Letters, 187, 94-97
- Article Type
- Antenna Substrate; Antenna Substrates; Antennas; Bandwidth; Carbon Dioxide; Dielectric Materials; Dielectric Substrates; Ferrite; Hexa-Ferrite; Hexa-Ferrites; Implantable Antennas; Implantable Medical Antenna; Magnetodielectric; Magnetodielectrics; Medical Implant Communication Services; MICS Band; Molten Salt Method; Spiral Antennas
- A magnetodielectric substrate is firstly proposed for implantable antennas in medical implant communication service (MICS) band. Ba3Co2Fe24O41 (Co2Z), Z-type hexaferrite flakes synthesized by molten-salt method were incorporated with a polymer matrix, having a real permeability of 2.88 and a magnetic loss of 0.029 at 402 MHz. A spiral antenna with the magnetodielectric substrate has a bandwidth 70% and 50% broader than that with a commercial dielectric substrate, Rogers 3210, in a 2/3-phantom model and a multi-layered body model, respectively. The band broadening retains the bandwidth to be overlapped after implant positions change, leading to an enhancement in insensitivity to the implant position. © 2016 Elsevier B.V.
- Elsevier B.V.
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