A metamaterial‐incorporated wireless power transmission system for efficiency enhancement

Wang, Meng; Guo, Jiun-In; Shi, Yanyan; Wang, Mengmeng; Song, Guangcheng; Yin, Renliang

doi:10.1002/cta.3587

Cited by 7 publications

(1 citation statement)

References 51 publications

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“…This distortion can lead to increased compression phenomena, and interference with other frequency bands. Consequently, the design process must carefully consider harmonic rejection [ 73 , 74 ]. This paper employs the load-traction suppression-design approach to optimize the performance of the active device, complemented by the addition of a waveguide harmonic-suppression filter at the output of the amplifier.…”

Section: Measurement Results and Analysismentioning

confidence: 99%

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Chen,

Wang,

Zhang

et al. 2024

PLoS ONE

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This paper presents a groundbreaking Ku-band 20W RF front-end power amplifier (PA), designed to address numerous challenges encountered by satellite communication systems, including those pertaining to stability, linearity, cost, and size. The manuscript commences with an exhaustive discussion of system design and operational principles, emphasizing the intricacies of low-noise amplification, and incorporating key considerations such as noise factors, stability analysis, gain, and gain flatness. Subsequently, an in-depth study is conducted on various components of the RF chain, including the pre-amplification module, driver-amplification module, and final-stage amplification module. The holistic design extends to the inclusion of the display and control unit, featuring the power-control module, monitoring module, and overall layout design of the PA. It is meticulously tailored to meet the specific demands of satellite communication. Following this, a thorough exploration of electromagnetic simulation and measurement results ensues, providing validation for the precision and reliability of the proposed design. Finally, the feasibility of that design is substantiated through systematic system design, prototype production, and exhaustive experimental testing. It is noteworthy that, in the space-simulation environmental test, emphasis is placed on the excellent performance of the Star Ku-band PA within the 13.75GHz to 14.5GHz frequency range. Detailed power scan measurements reveal a P1dB of 43dBm, maintaining output power flatness < ± 0.5dBm across the entire frequency and temperature spectrum. Third-order intermodulation scan measurements indicate a third-order intermodulation of ≤ -23dBc. Detailed results of power monitoring demonstrate a range from +18dBm to +54dBm. Scans of spurious suppression and harmonic suppression, meanwhile, show that the PA evinces spurious suppression ≤ -65dBc and harmonic suppression ≤ -60dBc. Rigorous phase-scan measurements exhibit a phase-shift adjustment range of 0° to 360°, with a step of 5.625°, and a phase-shift accuracy of 0.5dB. Detailed data from gain-scan measurements show a gain-adjustment range of 0dB to 30dB, with a gain flatness of ± 0.5dB. Attenuation error is ≤ 1%. These test parameters perfectly align with the practical application requirements of the technical specifications. When compared to existing Ku-band PAs, our design reflects a deeper consideration of specific requirements in satellite communication, ensuring its outstanding performance and uniqueness. This PA features good stability, high linearity, low cost, and compact modularity, ensuring continuous and stable power output. These features position the proposed system as a leader within the market. Successful orbital deployment not only validates its operational stability; it also makes a significant contribution to the advancement of China’s satellite PA technology, generating positive socio-economic benefits.

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Section: Measurement Results and Analysismentioning

confidence: 99%

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Chen,

Wang,

Zhang

et al. 2024

PLoS ONE

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Wireless power transfer efficiency enhancement based on a negative permeability double‐helix metamaterial structure

Huang,

Hou,

Chen

et al. 2024

Circuit Theory & Apps

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SummaryIn wireless power transfer (WPT) systems, extended transmission distances significantly impede efficiency, posing a major challenge to their practical application. This paper presents a novel ortho‐octagonal double‐helix metamaterial that can effectively enhance the transmission efficiency of WPT systems. It has theoretically derived and experimentally verified the enhancement of evanescent wave transmission by this metamaterial dielectric plate. A WPT simulation system operating at 10.78 MHz is constructed by HFSS software, and the effects of adding passive relay coils and different shapes of metamaterials on the transmission efficiency are comparatively investigated. Simulated data converge to indicate that integrating variously shaped metamaterials at the transceiver's end distinctly elevates the WPT system's transmission efficiency. When the transceiver coil spacing of the WPT system is greater than 22 cm, the effect of metamaterials on the system transmission efficiency enhancement shows an increasing and then decreasing trend as the distance increases. The positive octagonal metamaterial improves 12% over the circular metamaterial in the mid‐range transmission distance due to its better magnetic coupling effect. When the transceiver coil spacing is 22 cm, the open‐circuit voltage of the receiving coil after loading the metamaterial is stabilized to be enhanced by nearly five times, and it has the best effect at 30 cm, and the transmission efficiency is enhanced from 30% to 60%, which verifies the effective enhancement of the metamaterial on the transmission efficiency of the WPT system.

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Wireless Power Transfer System for Cardiac Pacemakers Based on Spiral Ring mu‐Negative Materials

Guirreh,

Zhu,

Chen

et al. 2024

Circuit Theory & Apps

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Considering the impact of metamaterials on the magnetic coupling effect and electromagnetic response characteristics in wireless power transfer systems for implantable cardiac pacemakers, this paper proposes a wireless power transfer system operating at the 300‐kHz frequency band, enhanced by spiral ring mu‐negative materials (SR‐MNG) to improve magnetic coupling efficiency. First, based on the resonance principle, the SR‐MNG is designed, and the system's mutual inductance coupling is analyzed using the magnetic dipole coupling model theory. Second, the impact of metamaterial thickness and loss on the system's coupling strength is investigated, and the performance of the system is analyzed when using FR4, polyimide, and aluminum nitride as dielectric substrate. The system's tolerance to misalignment is discussed bearing in mind the special implantation environment of the peacemaker. The experimental results indicate that, at a transmission distance of 20 mm, the system achieves optimal magnetic coupling strength with a thickness of 1.6 mm, resulting in a minimum power transmission efficiency of 71%. Increasing the thickness to 2 mm disrupts the trend of increasing efficiency, causing it to drop by at least 23.3%. The SR‐MNG with polyimide as the dielectric plate performs exceptionally well, maintaining an efficiency range of 17.3%–73.1% for lateral displacements between 0 and 30 mm and achieving a minimum efficiency of 39.2% for angular misalignment of 15°.

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A metamaterial‐incorporated wireless power transmission system for efficiency enhancement

Cited by 7 publications

References 51 publications

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Wireless power transfer efficiency enhancement based on a negative permeability double‐helix metamaterial structure

Wireless Power Transfer System for Cardiac Pacemakers Based on Spiral Ring mu‐Negative Materials

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