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. 2025 Jul 1;15(1):21005.
doi: 10.1038/s41598-025-05321-5.

Broad angle broadband resolver for THz band

Yasith Amarasinghe  1 , Yaseman Shiri  2 , Hichem Guerboukha  3 , Rabi Shrestha  2 , Pernille Klarskov  4 , Daniel M Mittleman  2
Affiliations

Broad angle broadband resolver for THz band

Yasith Amarasinghe et al. Sci Rep. .

Abstract

Terahertz (THz) communication systems hold immense potential for high-speed data transfer across various domains yet face challenges due to directionality constraints because of free space path loss. To address this, directional beams are commonly employed in THz technology. With the use of directional beams, it is important to track the transmitting device to maintain link connectivity. Wide angle receivers can be used to receive them but determining source angle has been an ongoing challenge. This study proposes a novel approach to overcome these challenges, balancing improved directionality with reduced directional gain by enhancing a traditional Leaky Parallel Plate Waveguide (LPPW). The proposed device can accurately determine the receiving angle of a beam by analyzing unique features extracted from the spatially resolved output. Experimentation and simulations reveal that the device allows for a broader angle of acceptance and calculation of the received angle at 200 GHz. This device can also be used as broadband receiver and can be reconfigured to optimize in different frequency bands.

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Conflict of interest statement

Competing interests: The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
(a) Plate separation vs. coupling angle. (b) A photo of the fabricated device. (c) Top view of the device and corresponding side profile of the device.
Fig. 2
Fig. 2
(a) Simulation of beam path inside the device for coupling angles of 30⁰, 40⁰, 50⁰, and 60⁰. (b) Experimental setup for wide angle measurements. (c) Received Signal power vs. coupling angle (solid line) and corresponding BER vs. coupling angle (dashed line).
Fig. 3
Fig. 3
(a) Simulation results for E field norm of coupling angles 30⁰, 45⁰ and 65⁰. (b) Simulation results of beam radius of the output and half peak-to-peak distance of the output vs. coupling angle and calculated distance of half peak to peak vs. coupling angle. (b-inset) photo of the horn antenna with reduced opening. (c) Experimental setup for linear scan at the receiver’s end. (d) Comparison of simulation and experiment results at the output for average.
See this image and copyright information in PMC

References

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