Tri-Frequency Wearable Antenna Loaded with Artificial Magnetic Conductors

JIN Bin; ZHANG Jialin; DU Chengzhu; CHU Jun

doi:10.11999/JEIT251050

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JIN Bin, ZHANG Jialin, DU Chengzhu, CHU Jun. Tri-Frequency Wearable Antenna Loaded with Artificial Magnetic Conductors[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT251050

Citation:

JIN Bin, ZHANG Jialin, DU Chengzhu, CHU Jun. Tri-Frequency Wearable Antenna Loaded with Artificial Magnetic Conductors[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT251050

JIN Bin, ZHANG Jialin, DU Chengzhu, CHU Jun. Tri-Frequency Wearable Antenna Loaded with Artificial Magnetic Conductors[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT251050

Citation:

JIN Bin, ZHANG Jialin, DU Chengzhu, CHU Jun. Tri-Frequency Wearable Antenna Loaded with Artificial Magnetic Conductors[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT251050

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Tri-Frequency Wearable Antenna Loaded with Artificial Magnetic Conductors

doi: 10.11999/JEIT251050 cstr: 32379.14.JEIT251050

School of Electronic and Information Engineering, Shanghai University of Electric Power, Shanghai 201306, China

Funds: Research on Key Issues of Hydrogel Optical Fiber Oxygen Sensing and Its Applications in Biomedical Engineering. This work was supported by the National Natural Science Foundation of China (No. 62205195)

Accepted Date: 2025-12-17
Rev Recd Date: 2025-12-17

Available Online: 2025-12-25

Abstract

Abstract

This paper designs a tri-band wearable antenna based on an Artificial Magnetic Conductor (AMC). A tri-frequency monopole antenna with a trident structure and a tri-frequency AMC unit with a three-layer square ring configuration were designed respectively. Both the antenna and the AMC are fabricated on a semi-flexible Rogers 4003 substrate. By loading a 4×5 AMC array on the back of the antenna, the integrated antenna achieves a measured operating bandwidth covering three frequency bands: 2.38-2.52 GHz, 3.3-3.86 GHz, and 5.54-7.86 GHz. These bands cover the ISM scientific band (2.4-2.4835 GHz), the 5G-n78 band (3.3-3.8 GHz), and the 5G-WiFi 5.8 GHz band (5.725-5.875 GHz). The measured gains at 2.4GHz, 3.5GHz, and 5.8GHz were 7.1dB, 7dB, and 7.1dB respectively, representing improvements of 5.3dB, 4.6dB, and 2.2dB compared to the unloaded state. The front-to-back ratio (FBR) was 20.8 dB, 18.0 dB, and 18.8 dB, respectively, representing improvements of 19.8 dB, 16.7 dB, and 12.4 dB compared to the unloaded AMC. Additionally, the AMC reflector effectively reduces the specific absorption rate (SAR), ensuring that the integrated antenna's SAR remains below 0.025 W/kg, which is far lower than the standards set by the U.S. Federal Communications Commission (FCC) and the European Telecommunications Standards Institute (ETSI).Additionally, the performance of the antenna was measured when it was attached to the human chest, back, and thigh. The test results demonstrate that the designed antenna can be applied to the human body safely and flexibly.
- Artificial Magnetic Conductor (AMC),
- Tri-band antenna,
- Wearable antenna

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References(18)

References

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