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Against the backdrop of the design of electronic devices tending towards lightweight, low-profile, and multi-target features, a novel near-field multi-focus beam synthesis approach is put forward based on a new two-dimensional tensor impedance surface. On this basis, a tensor impedance surface that radiates near-field multi-focus beams is designed to operate at 10 GHz with a thickness of merely 1.524 mm. This surface accomplishes the radiation of multi-focus beams in space and the free proportioning of dual-polarization components of the multi-focus beams, and the multi-target energy convergence efficiency can exceed 40% at a distance of 1.5 m. Its low-profile design, straightforward feed structure, and multi-target radiation characteristics endow it with excellent application prospects in lightweight electronic devices.
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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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