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In next−generation electronic information systems, ambient wireless energy harvesting (WEH) has emerged as a prominent research frontier. This work first presents a dual−band metasurface−based energy harvester leveraging an open split−ring resonator (SRR) architecture, achieving absorption efficiencies exceeding 90% at both 2.45 and 5.80GHz. Second, we propose a dual−band rectification system tailored for low−power−density environments, implemented via a single−stage voltage−doubler topology that jointly optimizes harmonic suppression and impedance matching. Under a load resistance of 800 Ω and an input power of 0 dBm, the RF−DC conversion efficiency reaches 53.5% at 2.45 GHz and 38.2% at 5.8 GHz. Third, a dual−band energy combining network is introduced to integrate the harvester and rectifier into a rectifying metasurface. Experimental validation confirms overall conversion efficiencies of 48.2% at 2.45 GHz and 37.7% at 5.8 GHz. Notably, the proposed rectifying metasurface maintains robust rectification performance over incident angles of ±40° at 2.45 GHz and ±30° at 5.8 GHz. Collectively, this design simultaneously addresses three critical challenges—low incident power sensitivity, dual−band operation, and wide−angle incident—demonstrating strong integration capability.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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