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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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A Novel System for Quasi-Continuous THz Signal Transmission and Reception.

Andrej Sarjaš1, Blaž Pongrac1, Dušan Gleich1

  • 1Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška Cesta 46, 2000 Maribor, Slovenia.

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|June 24, 2022
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Summary

This study introduces a new system for generating quasi-continuous (QC) TeraHertz (THz) waves using affordable, available components. The novel QC-THz system successfully transmits and receives signals up to 300 GHz, showing industrial potential.

Keywords:
photoconductive antennaquasi-continuousterahertzwave detectionwave emittance

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Area of Science:

  • Terahertz (THz) wave generation and detection
  • Optical signal processing
  • Photonics and optoelectronics

Background:

  • Traditional continuous-wave (CW) THz systems face limitations in certain applications.
  • Developing cost-effective and versatile THz generation methods is crucial for expanding THz technology.
  • Quasi-continuous (QC) wave generation offers a potential alternative to CW THz systems.

Purpose of the Study:

  • To present a novel system for generating and receiving quasi-continuous (QC) TeraHertz (THz) waves.
  • To provide a theoretical foundation and experimental validation for the proposed QC-THz system.
  • To evaluate the performance of the QC-THz system against state-of-the-art CW THz systems.

Main Methods:

  • Utilized commercially available photo-conductive antennas for THz transmission and reception.
  • Developed a custom QC optical signal generator based on a fast optical frequency sweep of a distributed-feedback laser diode.
  • Employed an unbalanced optical fiber Michelson interferometer for high-frequency modulation.

Main Results:

  • Successfully generated and received QC-THz waves up to 300 GHz.
  • Experimental results validated the theoretical model for the proposed QC-THz system.
  • The upper-frequency limit was determined by the Michelson interferometer's length.

Conclusions:

  • The proposed QC-THz system demonstrates the ability to transmit and receive QC-THz waves effectively.
  • The system's reliance on commercially available components and cost-efficiency suggests significant potential for industrial applications.
  • This novel approach offers a viable and economical solution for THz signal generation and reception.