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Transmission Line Design Considerations01:23

Transmission Line Design Considerations

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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Updated: Jun 27, 2026

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
13:31

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

Multiband Quasi-Yagi Antenna with Frequency-Selective Multi-Branch Directors for Sub-6 GHz Applications.

Dokhyl AlQahtani1, Faroq Razzaz1, Saud M Saeed2

  • 1Electrical Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Al-Kharj 16278, Saudi Arabia.

Sensors (Basel, Switzerland)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a new multiband quasi-Yagi antenna design for high gain and low profile. Optimized with branch line directors, it achieves significant gains across 2.45, 3.60, and 5.80 GHz bands, ideal for 5G and Wi-Fi.

Keywords:
high-gain antennamultiband antennamultibranch line directorquasi-Yagisub-6 GHz

Related Experiment Videos

Last Updated: Jun 27, 2026

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
13:31

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Antenna Theory

Background:

  • Multiband antennas are crucial for modern wireless communication systems requiring operation across diverse frequency spectra.
  • Existing antenna designs often face trade-offs between gain, profile, and bandwidth, necessitating innovative solutions for enhanced performance.

Purpose of the Study:

  • To present a novel, high-gain, low-profile multiband quasi-Yagi antenna design.
  • To investigate the antenna's performance across the 2.45 GHz, 3.60 GHz, and 5.80 GHz frequency bands.
  • To evaluate the impact of branch line directors on antenna gain and radiation characteristics.

Main Methods:

  • The proposed antenna utilizes a driven dipole, parasitic elements, and a novel branch line director.
  • Simulations and analysis were performed to determine radiation patterns, front-to-back ratios, and realized gains.
  • A 2x1 Multiple-Input Multiple-Output (MIMO) configuration was also designed and analyzed for inter-element isolation.

Main Results:

  • The single-branch director antenna achieved gains of 6.7, 7.5, and 7.4 dBi at 2.45, 3.6, and 5.8 GHz.
  • With five branch line directors, realized gains increased to 10.1, 11.8, and 11.9 dBi across the respective bands.
  • Front-to-back ratios exceeded 13.4 dB in all operating bands, indicating directional radiation.

Conclusions:

  • The novel multiband quasi-Yagi antenna design offers high gain and excellent front-to-back ratios.
  • The antenna's performance is suitable for 5G, Wi-Fi, and Internet of Things (IoT) sub-6 GHz applications.
  • The 2x1 MIMO configuration demonstrated high inter-element isolation, confirming its viability for advanced wireless systems.