This article describes a high-efficiency harmonic suppression metasurface (HSMS) energy collector, which is insensitive to frequency, input power, and load. A method of integrating harmonic suppression function into energy collection metasurface (MS) to improve system conversion efficiency is proposed. Integrated RF synthesis channels in HSMS improve diode power availability and turn-on time. An $8\times 8$ finite element MS array was designed and fabricated, achieving a conversion efficiency $_{\mathrm {RF}-\mathrm {ac}}$ of 96%. The measurement results show that the integrated harmonic suppression can improve the efficiency of ac–dc conversion by 2%–4%. In addition, we propose an impedance compression rectifier to reduce the input power and load requirements of the system. Since HSMS eliminates harmonic suppression networks, the rectifier structure is simple and compact. Finally, the system achieved an efficiency of 74.5% at 5.8 GHz with an input power of 18 dBm. Importantly, it shows that HSMS energy collectors can remain efficient over a wide range of power 6–25 dBm and loads of 500– $2000~\Omega $ . The proposed concept is suitable for high-efficiency microwave power transmission (MPT) systems with different input power and load conditions.

中文翻译：

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一种用于微波功率传输的对负载和输入功率不敏感的谐波抑制能量收集超表面

本文介绍了一种对频率、输入功率和负载不敏感的高效谐波抑制超表面 (HSMS) 能量收集器。提出了一种将谐波抑制功能集成到能量收集超表面（MS）中以提高系统转换效率的方法。HSMS 中的集成射频合成通道提高了二极管电源的可用性和开启时间。一个 $8\乘以 8$有限元 MS 阵列的设计和制造，实现了转换效率 $_{\mathrm {RF}-\mathrm {ac}}$96%。测量结果表明，集成谐波抑制可以将ac-dc转换效率提高2%~4%。此外，我们提出了一种阻抗压缩整流器来降低系统的输入功率和负载要求。由于HSMS消除了谐波抑制网络，整流器结构简单紧凑。最后，该系统在 5.8 GHz 下以 18 dBm 的输入功率实现了 74.5% 的效率。重要的是，它表明 HSMS 能量收集器可以在 6–25 dBm 的宽功率范围和 500– 的负载范围内保持高效。 $2000~\欧米茄$. 所提出的概念适用于具有不同输入功率和负载条件的高效微波功率传输 (MPT) 系统。