A Survey of Antenna Miniaturization Technology Based on the New Mechanism of Acoustic Excitation

Li, Wanqing; Li, Du; Zhou, Kaixiang; Fu, Qun; Yuan, Xuelin

doi:10.1109/tap.2022.3220663

Cited by 11 publications

(3 citation statements)

References 78 publications

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“…In the realm of wearable technology, the future of wristworn antennas appears promising with continuous advancements in miniaturization techniques [129], [130] and integration with additive manufacturing technologies [131]- [133], such as 3D printing [134], screen printing [135], [136], and inkjet printing [137], [138]. Antenna miniaturization facilitates sleeker and more aesthetically pleasing designs, thereby enhancing user comfort and wearability [139].…”

Section: Future Perspectivesmentioning

confidence: 99%

“…Antenna miniaturization facilitates sleeker and more aesthetically pleasing designs, thereby enhancing user comfort and wearability [139]. The authors of [129], [130] discuss several antenna miniaturization techniques, such as implementing space-filling curves, fractal geometries, meander lines, engineered ground planes, reactive loading, high-dielectric constant substrates, 3D printing for complex geometries, slow-wave structures, and metamaterials. One or a hybrid of more than one antenna miniaturization technique can be utilized to design compact, highly integrated antennas for smartwatch wireless sensing devices.…”

Section: Future Perspectivesmentioning

confidence: 99%

See 1 more Smart Citation

Sub-GHz Wrist-Worn Antennas for Wireless Sensing Applications: A Review

Kumar,

Moloudian,

Simorangkir

et al. 2024

IEEE Open J. Antennas Propag.

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With recent advances in wearable wrist-worn wireless sensing applications, the demand for smartwatches and wristbands is rapidly increasing due to their widespread adoption in applications such as smart health monitoring, security, and fitness tracking. Currently, these devices primarily operate in the 2.45 GHz band, leveraging the availability of Bluetooth and Wi-Fi wireless technologies. However, the use of 433 MHz, 868 MHz, 915 MHz, 923 MHz) for wearable systems has also gained interest due to the emergence of wireless technologies like long-range wide area network (LoRaWAN), narrowband-IoT (NB-IoT) and Sigfox, which offer the potential for long-range wireless communications and sensing applications. In recent times, there has been a notable surge in the commercial production of a variety of Sub-GHz wrist-worn wireless sensing devices for health monitoring and tracking applications. Nevertheless, communications at Sub-GHz frequencies present significant challenges in antenna design, primarily due to the practical size constraints of wrist-worn devices and the necessity for using electrically small antennas. This paper meticulously reviews wrist-worn Sub-GHz antennas reported in the literature, analyzing key antenna parameters such as antenna topology, size, impedance bandwidth, peak realized gain, radiation efficiency, and specific absorption rate (SAR). Additionally, it underlines antenna design challenges, limitations, current trends, and presents potential future perspectives. To the best of the author's knowledge, there is currently no existing literature comprehensively reviewing Sub-GHz wristworn antennas. Therefore, this paper represents the inaugural effort to provide a comprehensive review in this specific domain.

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Section: Future Perspectivesmentioning

confidence: 99%

Section: Future Perspectivesmentioning

confidence: 99%

Sub-GHz Wrist-Worn Antennas for Wireless Sensing Applications: A Review

Kumar,

Moloudian,

Simorangkir

et al. 2024

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

show abstract

“…Traditional metallic antennas working at VLF/LF band suffer from bulky dimensions and declined radiation efficiency [6,7]. The acoustically driven piezoelectric antenna (ADPA) break the limitations in operating frequency and dimensions of conventional metallic antennas, and has the advantages of LF miniaturization and high radiation efficiency [8,9]. However, the development of communication technology based on ADPA is inadequate, and there are technical problems such as narrow relative bandwidth and low radiation intensity.…”

Section: Introductionmentioning

confidence: 99%

High radiation performance and multi-band acoustically driven piezoelectric antenna based on energy trapping theory

Zhang,

Zhou,

Yan

et al. 2023

J. Phys. D: Appl. Phys.

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The paper introduces a novel design method for an acoustically driven piezoelectric antenna (ADPA) with high radiation performance and broadband characteristics based on energy trapping theory. The reasonableness of the design method is demonstrated by analytically deriving the radiated magnetic field, radiated efficiency and resonant frequency, which are further validated by simulation analysis. Furthermore, a prototype is fabricated and measured, and the results indicate remarkable improvements compared to the non-energy trapping mode, the bandwidth is widened by 10%, the radiation efficiency is increased by 28%, the radiation magnetic field is increased by 3 times, the transmission distance is increased by 2.75 times. The radiation enhancement and multi-band capability of the proposed antenna has been successfully demonstrated. Additionally, we have successfully implemented amplitude modulation (AM) signals transmission using proposed antenna. These results highlight the significant potential of the proposed antenna for portable, miniaturized, and high-performance wireless communication devices.

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A Bionic Flapping Magnetic‐Dipole Resonator for ELF Cross‐Medium Communication

Cheng,

Zhou,

Wang

et al. 2024

Advanced Science

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Extremely low‐frequency (ELF) electromagnetic (EM) waves adeptly propagate in harsh cross‐medium environments, overcoming rapid decay that hinders high‐frequency counterparts. Traditional antennas, however, encounter challenges concerning size, efficiency, and power. Here, drawing inspiration from nature, we present a groundbreaking piezo‐actuated, bionic flapping‐wing magnetic‐dipole resonator (BFW‐MDR), operating in the electro‐mechano‐magnetic coupling mechanism, designed for efficient ELF EM wave transmission. The unique rigid‐flexible hybrid flapping‐wing structure magnifies rotation angles of anti‐phase magnetic dipoles by tenfold, leading to constructive superposition of emitted magnetic fields. Consequently, the BFW‐MDR exhibits a remarkable quality factor of 288 and an enhanced magnetic field emission of 514 fT at 100 meters with only 6.9 mW power consumption, surpassing traditional coil antennas by three orders of magnitude. The communication rate is doubled by the ASK+PSK modulation method. Its robust performance in cross‐medium communication, even amidst various interferences, underscores its potential as a highly efficient antenna for underwater and underground applications.

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A Survey of Antenna Miniaturization Technology Based on the New Mechanism of Acoustic Excitation

Cited by 11 publications

References 78 publications

Sub-GHz Wrist-Worn Antennas for Wireless Sensing Applications: A Review

Sub-GHz Wrist-Worn Antennas for Wireless Sensing Applications: A Review

High radiation performance and multi-band acoustically driven piezoelectric antenna based on energy trapping theory

A Bionic Flapping Magnetic‐Dipole Resonator for ELF Cross‐Medium Communication

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