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The effect of angular dispersion on THz data transmission.
Rabi Shrestha1, Zhaoji Fang2, Hichem Guerboukha2
1School of Engineering, Brown University, Providence, RI, 02912, USA. rabi_shrestha@brown.edu.
Scientific Reports
|June 29, 2022
Summary
Future terahertz (THz) wireless systems need high directionality, impacting optical phenomena. This study explores how frequency-dependent radiation patterns affect THz communication link robustness.
Area of Science:
- Wireless Communication
- Electromagnetics
- Optics
Background:
- Legacy wireless systems operate at low frequencies, unlike future terahertz (THz) systems.
- Future THz wireless transmissions necessitate high directionality to mitigate substantial free-space path loss.
- The high directionality of THz links makes optical phenomena critical design considerations.
Purpose of the Study:
- To investigate the implications of frequency-dependent angular radiation patterns in THz communication links.
- To analyze how optical effects, such as diffraction and leaky-wave emission, influence THz transmission.
- To assess the impact of these phenomena on the spectral bandwidth and data transmission robustness at high frequencies.
Main Methods:
- Incorporating a diffraction grating into a communication link model.
- Integrating a leaky wave antenna into a communication link model.
- Analyzing the nonlinear dependence of spectral bandwidth on receiver position and distance.
Main Results:
- Demonstrated strong dependence of angular radiation patterns on transmission frequency in THz links.
- Observed that spectral bandwidth at the receiver is nonlinearly dependent on angular position and distance.
- Quantified the impact of diffraction gratings and leaky wave antennas on THz communication.
Conclusions:
- Frequency-dependent radiation patterns are a key characteristic of THz wireless systems.
- These optical effects significantly influence the design and performance of THz communication links.
- Understanding these phenomena is crucial for ensuring robust data transmissions at terahertz frequencies.
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