平板型聚光器作为可见光通信中光学天线的设计与性能分析 
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Design and Performance Analysis of Planar Concentrators as Optical Antennas in Visible Light Communication
长春理工大学光电工程学院, 吉林 长春 130022
图 & 表
图 1. 主聚光器结构。(a)侧视图; (b)俯视图; (c)三维图
Fig. 1. (a) Side view, (b) top view, and (c) three-dimensional view of the master collector structure
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图 2. 波导板结构示意图
Fig. 2. Schematic diagram of the lightguide structure
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图 3. 室内光源布局模型
Fig. 3. Layout model of indoor light source
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图 4. 接收平面光照度分布
Fig. 4. Illumination distribution on receiving plane
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图 5. 平板型聚光器在40°视场角时仿真示意图。 (a)主聚光器光线追迹示意图;(b) 平板型聚光器结构图; (c) 采用聚光器时接收端的光斑分布; (d)未采用聚光器时接收端的光斑分布
Fig. 5. Simulation diagrams of the planar concentrator with a field of view of 40°. Schematic diagrams of (a) ray-tracing of the collector and (b) the planar concentrator structure; irradiance distributions of the receiver (c) with and (d) without the planar concentrator
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图 6. 接收平面BER均值分布
Fig. 6. Distribution of BER average value on receiving plane
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图 7. 聚焦光斑辐照度分布。 图(a)、(b)、(c)、(d)接收天线位置空间坐标分别为(1.60 mm, 0, 0.85 mm)(1.60 mm, 0.80 mm, 0.85 mm)(1.60 mm, 1.60 mm, 0.85 mm)(1.60 mm, 2.50 mm, 0.85 mm)
Fig. 7. Irradiance distributions of concentrated spot with x=1.60 mm, z=0.85 mm, and (a) y=0, (b) y=0.80 mm, (c) y=1.60 mm, and (d) y=2.50 mm
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图 8. 3种聚光器长度下聚光效率随光线耦合结构半径的变化曲线
Fig. 8. Optical efficiencies vary with the coupling structure radii with three concentrator lengths
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图 9. 平板型聚光器作为光学天线在不同视场角下的增益
Fig. 9. Gain of the planar concentrators as optical antenna in different fields of view
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图 10. LOS信道下接收功率分布。 (a) 不使用聚光器;(b)、 (c)、 (d) 、(e)使用视场角分别为10°, 30°, 50°, 70°的平板型聚光器
Fig. 10. Distributions of received power in LOS (a) without concentrator and using a planar concentrator with the fields of view of (b) 10°, (c) 30°, (d) 50°, and (e) 70°
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图 11. NLOS信道下接收功率分布。 (a) 不使用聚光器;(b)、 (c)、 (d) 、(e)使用视场角分别为10°, 30°, 50°, 70°的平板型聚光器
Fig. 11. Distribution of received power in NLOS. (a) Without concentrator; (b) using a planar concentrator of the field of 10° view; (c) using a planar concentrator of the field of 30° view; (d) using a planar concentrator of the field of 50° view; (e) using a planar concentrator of the field of 70° view
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表 1视场角为40°时平板型聚光器的关键设计参数
Table1. Key design parameters of planar concentrator with a field of view of 40°
| Radius curvature of the collectorρ /mm | Parabolic coefficienta | Collector widthD /mm | Collector heighth /mm | Lightguide lengthlm /mm | Lightguide thicknessw /mm | Field of viewθmax /(°) | Collector material |
|---|
| -34 | 0.021 | 5 | 42 | 600 | 2 | 40 | PMMA |
|
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表 2LED光源相关设计参数
Table2. Design parameters of the LED light source
| Ray distribution | LED sizeSs /mm2 | LED powerPs /W | Color temperatureT /K | Simulation rays amount |
|---|
| Lambertian | 1 | 1 | 4500 | 100000 |
|
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表 3不同视场角下的平板型聚光器参数与增益值
Table3. Parameters and gain values of planar concentrator in different fields of view
| Field of viewθmax /(°) | Parabolic coefficientρ /mm | Collector heighth /mm | Lightguide lengthlc /mm | Rays amount(with collector) | Rays amount(without collector) | Gain g(θc) |
|---|
| 0 | ∞ | 42 | 600 | 39900 | 144 | 277 | | 10 | -52 | 42 | 600 | 2562 | 61 | 42 | | 20 | -46 | 42 | 600 | 3762 | 209 | 18 | | 30 | -39 | 42 | 600 | 2540 | 324 | 7.84 | | 40 | -34 | 42 | 600 | 1457 | 396 | 3.68 | | 50 | -30 | 42 | 600 | 761 | 435 | 1.75 |
|
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表 4LOS信道下不同视场角平板型聚光器的接收功率分布
Table4. Distribution of received power in LOS using the planar concentrators with different fields of view
| Type of optical antenna | Field of viewθmax /(°) | Minimal received powerPmin /W | Maximal received powerPmax /W | Average received powerPave /W |
|---|
| Without collector | | -9.9431 | -3.1408 | -4.5137 | | Planar concentrator | 10 | -∞ | 21.4318 | 0.3796 | | 30 | -∞ | 23.1988 | 3.8864 | | 50 | -10.0432 | 23.1956 | 11.7274 | | 70 | 16.0327 | 20.0046 | 18.1684 |
|
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表 5NLOS信道下不同视场角下平板型聚光器的接收功率分布
Table5. Distribution of received power of the planar concentrators in different fields of view in NLOS
| Type of optical antenna | Field of viewθmax /(°) | Minimal received powerPmin /W | Maximal received powerPmax /W | Average received powerPave /W |
|---|
| Without collector | | -9.7876 | -3.2394 | -4.1547 | | Planar concentrator | 10 | -∞ | 21.9105 | 0.8863 | | 30 | -∞ | 23.9054 | 4.3167 | | 50 | -9.9481 | 24.0064 | 12.3409 | | 70 | 16.0547 | 20.1794 | 18.9534 |
|
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尹鹏, 徐熙平, 姜肇国, 王加安, 张璐璐. 平板型聚光器作为可见光通信中光学天线的设计与性能分析[J]. 光学学报, 2018, 38(4): 0406004. Peng Yin, Xiping Xu, Zhaoguo Jiang, Jiaan Wang, Lulu Zhang. Design and Performance Analysis of Planar Concentrators as Optical Antennas in Visible Light Communication[J]. Acta Optica Sinica, 2018, 38(4): 0406004.
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