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Reflection Characteristics Measurements of Indoor Wireless Link in D-Band
Mingxu Wang1, Yanyi Wang1, Weiping Li1
1Department of Communication Science and Engineering, and the Key Laboratory for Information Science of Electromagnetic Waves (MoE), Fudan University, Shanghai 200433, China.
Sensors (Basel, Switzerland)
|September 23, 2022
Summary
This study models millimeter wave (mm-Wave) and terahertz (THz) indoor wireless communication reflection channels. Measurements show reflection coefficients decrease with frequency, while surface roughness increases, impacting future D-band wireless link designs.
Area of Science:
- Electromagnetics and Wave Propagation
- Wireless Communication Systems
- Materials Science
Background:
- Millimeter wave (mm-Wave) and terahertz (THz) frequencies are crucial for future high-speed indoor wireless communication.
- Accurate characterization and modeling of reflection channels are essential for designing robust indoor wireless systems.
- Understanding material reflection properties at these frequencies is key to mitigating signal loss and interference.
Purpose of the Study:
- To characterize and model reflection channels for indoor wireless communication systems operating in the D-band (110-170 GHz).
- To investigate the influence of different building materials, incident angles, and frequencies on wave reflection.
- To propose a modified reflection model validated by experimental measurements.
Main Methods:
- Conducted reflection measurements using parallel polarized waves across multiple incident angles for five different indoor materials.
- Employed the D-band frequency range (110-170 GHz).
- Developed and validated a modified reflection model using the minimum mean square error (MMSE) criterion.
Main Results:
- Experimental measurements showed good agreement with the proposed modified reflection model.
- Reflection coefficients and relative permittivity generally decreased with increasing frequency, while surface roughness slightly increased, indicating weak frequency dependence.
- Concrete boards, despite higher surface roughness and associated specular power loss, exhibited the lowest reflection loss under specific conditions, highlighting the complex interplay of factors.
Conclusions:
- Reflection characteristics of indoor materials in the D-band are influenced by a combination of surface roughness, relative permittivity, frequency, and incident angle.
- The proposed model provides a valuable tool for understanding and predicting reflection behavior in indoor D-band wireless environments.
- These findings have prospective applications for the development of future indoor wireless communication systems operating in the D-band and beyond.
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