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Polar Coordinates: Problem Solving01:27

Polar Coordinates: Problem Solving

Directional radiation patterns are central to antenna analysis, as they illustrate how signal strength varies with direction. These patterns are often modeled using polar plots, where the radial distance from the origin represents signal intensity at a given angle. A commonly used idealized form is the four-lobed rose curve, which captures the concept of directional beams in a simplified mathematical form.The four-lobed rose curve, described by r = cos⁡(2θ), features four symmetric lobes, each...

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Related Experiment Video

Updated: Jul 18, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Compact Slotted Waveguide Antenna Array Using Staircase Model of Tapered Dielectric-Inset Guide for Shipboard Marine

Kyei Anim1, Henry Abu Diawuo1, Young-Bae Jung1

  • 1Electronics Engineering Department, Hanbat National University, Daejeon 34158, Korea.

Sensors (Basel, Switzerland)
|July 24, 2021
PubMed
Summary

A novel slotted waveguide antenna (SWA) array design significantly reduces size and weight for marine radar. This new X-band SWA configuration achieves high gain and improved radiation efficiency, enhancing shipboard radar performance.

Keywords:
X-bandbeam scanningdielectric-inset guidehigh gainlow weightmarine radarradiation efficiencysize reductionslotted waveguide arraytapering

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Area of Science:

  • Electromagnetics and Antenna Engineering
  • Radar Systems and Signal Processing

Background:

  • Slotted waveguide antennas (SWAs) are crucial for shipboard marine radar systems.
  • Conventional SWAs are often bulky, heavy, and complex, limiting performance in high-speed scanning applications.

Purpose of the Study:

  • To develop a compact and lightweight SWA array for X-band marine radar.
  • To improve antenna gain and radiation efficiency compared to traditional designs.

Main Methods:

  • Introduction of a tapered dielectric-inset guide structure into the SWA design.
  • Numerical simulations to evaluate antenna performance characteristics.

Main Results:

  • Achieved a 62% reduction in SWA array size.
  • Demonstrated high gain performance up to 30 dB.
  • Numerical simulations indicated radiation efficiency improvements up to 80%.

Conclusions:

  • The proposed SWA array offers a significant size and weight reduction for shipboard marine radar.
  • The novel design enhances key performance metrics like gain and radiation efficiency.