面向6G的太赫兹信道反射特性研究

doi:10.11959/j.issn.1000-436x.2022102

Abstract

Abstract:

The reflection characteristics of the terahertz channel are crucial for understanding and mastering the propagation mechanism of the terahertz channel, which are also required for a high-precision terahertz channel model for 6G.Therefore, the research status of terahertz channel reflection characteristics in theoretical modeling and measurement analysis were first summarized.Then, the reflection coefficient measurement campaign in the frequency range of 240 GHz to 310 GHz for five kinds of common building materials was conducted by a time-domain correlation-based terahertz channel measurement platform.It was found that the reflection coefficients were related to the incident angle.Based on the Rayleigh reflection coefficient theoretical model, a statistical reflection coefficient model was further proposed as a function of incident angle.Generally, the proposed model could accurately describe the variation law of the reflection coefficient with angle.Finally, research directions of terahertz channel reflection characteristics were discussed.

Key words: 6G, terahertz, channel characteristic, channel measurement, reflection characteristic, reflection coefficient

CLC Number:

TN92

Pan TANG, Jiaxin LIN, Jianhua ZHANG, Lei TIAN, Zhaowei CHANG, Liang XIA, Qixing WANG. Research on reflection characteristics of the terahertz channel for 6G[J]. Journal on Communications, 2022, 43(5): 102-109.

Figures/Tables 11

References 26

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测量平台	适用频率	可达带宽	动态范围	测量距离
THz-TDS	100 GHz～10 THz	极高（几THz）	低（小于50 dB）	短（几米）
VNA	约100～350 GHz	高（110 GHz）	高（60～90 dB）	中等（几十米，利用光纤无线电可扩展至100 m）
基于相关的测量平台	约100～300 GHz	低（几 GHz）	高（145 dB）	长（几十米）

参考文献	测量平台	频率范围/GHz	入射角范围	入射波极化类型	被测样本
文献[11]	THz-TDS	70～350	20°～75°	TE、TM	玻璃、石膏、木板
文献[15]	THz-TDS	100～1 000	25°～70°	TE、TM	石膏混凝土、嵌纹墙纸覆盖的纸板
文献[18]	THz-TDS	100～500	25°～60°	TE、TM	双层玻璃、白色油漆覆盖的石膏
文献[19]	VNA	110～135	20°～60°	TE、TM	双层玻璃、石膏、混凝土、中纤板
文献[16]	VNA	750～1 100	0°	TE/TM	木板、砖、塑料
文献[20]	VNA	270～330	—	—	玻璃、纸、木板、塑料
文献[21]	基于相关的测量平台	28～140	10°～80°	TE	干墙
文献[22]	基于相关的测量平台	253	10°～80°	TE、TM	木板、混凝土、金属
注：—表示文献中未提及

参数	数值
最小中心频率/GHz	240
最大中心频率/GHz	310
中心频率间隔/GHz	10
带宽/GHz	2
天线极化类型（波极化类型）	垂直极化（TE）
最小入射角	10°
最大入射角	80°
入射角间隔	10°

频率/GHz	玻璃				瓷砖				木板				石膏				铝合金
频率/GHz	a	b	c	RMSE	a	b	c	RMSE	a	b	c	RMSE	a	b	c	RMSE	a	b	c	RMSE
240	-9.506	3.277	-1.407	0.119	-6.504	5.877	-4.134	0.083	-6.576	2.291	-3.126	0.117	-7.249	1.543	-3.888	0.070	-7.949	61.730	-0.748	0.120
250	-9.100	3.410	-2.389	0.101	-8.693	3.761	-4.457	0.113	-7.494	2.076	-3.868	0.096	-7.352	1.363	-4.012	0.080	-6.638	44.190	-0.423	0.164
260	-9.771	1.665	-4.170	0.153	-6.079	2.308	-4.088	0.124	-7.613	1.691	-4.064	0.096	-7.277	1.206	-4.385	0.097	-9.674	14.930	-1.904	0.148
270	-8.786	3.007	-4.711	0.094	-8.397	3.948	-4.433	0.115	-8.116	2.092	-3.531	0.090	-7.443	1.471	-4.083	0.087	-9.964	170.300	-2.651	0.204
280	-8.694	2.228	-4.147	0.132	-9.639	3.421	-2.180	0.174	-7.677	1.690	-3.777	0.099	-7.651	1.305	-4.171	0.109	-7.212	16.110	-1.507	0.201
290	-9.183	2.606	-3.527	0.111	-8.743	2.980	-4.215	0.173	-6.619	1.745	-3.574	0.129	-8.401	1.445	-4.369	0.104	-9.556	32.500	-2.309	0.176
300	-8.288	2.124	-3.995	0.145	-8.670	2.943	-2.013	0.099	-7.883	1.826	-3.699	0.105	-7.595	1.347	-4.141	0.095	-7.408	12.970	-2.098	0.222
310	-8.588	3.563	-2.119	0.097	-8.168	5.228	-1.558	0.117	-6.537	2.481	-2.885	0.088	-7.828	1.578	-3.888	0.120	-13.250	536.500	-2.114	0.125

Research on reflection characteristics of the terahertz channel for 6G

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