The Perspective of Magneto-Electric Dipole Antennas

Elaboration , 2021 , 122 Pages , Grade: A

Engineering - Communication Technology

This book presents the proposal for the novel designs of the wideband Magneto-Electric (ME) dipole antenna for various applications in wireless communication. The standard ME dipole consists of a planar dipole, which acts like an electric dipole, and a vertically oriented quarter wave shorted patch, equivalent to a magnetic dipole. The research demonstrates the good electrical characteristics for the proposed designs of the wideband ME dipole antenna and shows low cross-polarization radiations, stable antenna gain across the operating frequency band and almost identical radiation patterns in the E- plane and H-plane. Literature confirms the design of the ME dipole antenna as linearly polarized, circularly polarized or differentially fed antenna and this thesis presents five novel structures of ME dipole antenna for applications like airborne radar, Ultra-Wide Band (UWB), mobile communication and satellite communication. After examining a number of feeding techniques designed to enhance the impedance bandwidth of ME dipole antenna, which includes co-axial-to-patch probe feeding, transition of microstrip-to-parallel strip line feeding, differential feeding, the book presents all the novel designs using co-axial probe feeding.

Inhaltsverzeichnis (Table of Contents)

• Chapter 1 Introductory Chapter
  • 1.1 Introduction
  • 1.2 Review of Previous Research
    • 1.2.1 Wideband unidirectional patch antenna
    • 1.2.2 Bandwidth Enhancement Techniques for Conventional unidirectional Microstrip Patch Antenna
      • 1.2.2.1 U-slot Technique
      • 1.2.2.2 L-shaped Probe Technique
    • 1.2.3 The Dipole Antenna
      • 1.2.3.1 Bandwidth Enhancement Techniques for Dipole Antenna
    • 1.2.4 Complementary Antenna
      • 1.2.4.1 Complementary Antenna Composed of Slot Antenna and Parasitic Wires
      • 1.2.4.2 Complementary Antenna Composed of Slot Antenna and a Monopole
    • 1.2.5 Magneto-Electric Dipole Antenna
      • 1.2.5.1 Magneto-Electric Dipole Antenna with Modified Ground Plane
      • 1.2.5.2 Magneto-Electric Dipole Antenna with Differential Feed
      • 1.2.5.3 Circularly Polarized Magneto-Electric Dipole Antenna
      • 1.2.5.4 Planar Printed Magneto-Electric Dipole Antenna
      • 1.2.5.5 Reconfigurable Magneto-Electric Dipole Antenna
      • 1.2.5.6 Millimeter Waves Magneto-Electric Dipole Antenna
    • 1.3 Objectives
    • 1.4 Structure of the Book
  • Chapter 2 Design of an End-Fire Magneto-Electric Dipole Antenna
    • 2.1 Introduction
    • 2.2 Antenna Description and Design Geometry
    • 2.3 Current Distribution in the Magneto-Electric Dipole Antenna
    • 2.4 Simulation and Measured Results
    • 2.5 Parametric Study
      • 2.5.1 Effect of Variation in length of Capacitive Arm
    • 2.6 Conclusion
  • Chapter 3 Design of a Differentially-fed Magneto-Electric Dipole Antenna
    • 3.1 Introduction
    • 3.2 Electrical Parameters of Differentially fed Antenna
    • 3.3 Antenna Description and Design Geometry
    • 3.4 Simulation and Measured Results
    • 3.5 Conclusion
  • Chapter 4 Design of Magneto-Electric Dipole Antenna with Modified Ground Plane
    • 4.1 Introduction
    • 4.2 Principle of Operation
    • 4.3 Design of E-Shaped Antenna without Cavity
    • 4.4 Performance of E-Shaped Antenna without Cavity
    • 4.5 E-Shaped Antenna with Rectangular Cavity Reflector
      • 4.5.1 Effect of Height of Rectangular Cavity
      • 4.5.2 Effect of Width of Rectangular Cavity
    • 4.6 Simulation and Measurement Results
    • 4.7 Conclusion
  • Chapter 5 Design of a Planar Circularly Polarized Magneto-Electric Dipole Antenna
    • 5.1 Introduction
    • 5.2 Antenna Geometry and Design
    • 5.3 Current Distribution
    • 5.4 Simulations and Measurements
    • 5.5 Parametric Study
      • 5.5.1 Effect of Length of ground Plane
      • 5.5.2 Effect of Width of ground Plane
      • 5.5.3 Effect of Width of Feed Line
    • 5.6 Conclusion
  • Chapter 6 Design of a Magneto-Electric Monopole Antenna
    • 6.1 Introduction
    • 6.2 Antenna Design and Geometry
    • 6.3 Current Distribution
    • 6.4 Analysis of Magneto-Electric Monopole Antenna
    • 6.5 Simulation and Measurement Results Analysis
    • 6.6 Parametric Study
      • 6.6.1 Effect of Height of Monopole Antenna
      • 6.6.2 Effect of length of Feed of Monopole Antenna
      • 6.6.3 Effect of Width of Ground Plane
      • 6.6.4 Effect of Length of Ground Plane
    • 6.10 Conclusion

  Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

  This thesis aims to present novel designs of magneto-electric dipole antennas with improved characteristics, suitable for various wireless communication applications. The primary objective is to explore new configurations and feeding techniques that can enhance bandwidth, gain, and radiation patterns while maintaining a compact and low-profile structure.

  • Wideband antenna design for various wireless applications, including airborne radar, ultra-wideband, and satellite communication.
  • Enhancement of antenna gain and impedance bandwidth through the use of modified ground planes and novel feeding structures.
  • Optimization of antenna performance for specific frequency bands, such as Ku-band, S-band, X-band, and C-band.
  • Investigation of circular polarization and end-fire radiation patterns to broaden the applicability of magneto-electric dipole antennas.
  • Analysis of antenna characteristics, including gain, bandwidth, radiation patterns, and antenna efficiency, using simulation and experimental measurements.

  Zusammenfassung der Kapitel (Chapter Summaries)

  • Chapter 1 provides a comprehensive review of previous research on wideband antennas, focusing on conventional patch antennas, dipole antennas, and complementary antennas. The chapter highlights the advantages and limitations of these antennas, setting the stage for the introduction of magneto-electric dipole antennas.
  • Chapter 2 presents a novel design of a wideband magneto-electric dipole antenna with a Z-shaped feed that produces an end-fire radiation pattern, suitable for airborne radar applications. The chapter analyzes the antenna's characteristics, including impedance bandwidth, gain, and radiation patterns, and discusses the impact of different design parameters.
  • Chapter 3 explores the design of a differentially-fed magneto-electric dipole antenna for ultra-wideband applications. The chapter examines the electrical parameters of differentially-fed antennas and presents a simple and efficient design that achieves an ultra-wide impedance bandwidth and stable radiation patterns.
  • Chapter 4 investigates the use of a modified ground plane to enhance the gain of a wideband magneto-electric dipole antenna. The chapter analyzes the impact of a rectangular cavity reflector on the antenna's performance, exploring the effects of cavity height and length on gain, bandwidth, and radiation patterns.
  • Chapter 5 introduces a novel design for a planar circularly polarized magneto-electric dipole antenna for X-band applications. The chapter discusses the antenna's geometry and design, including the use of an inverted U-shaped feed, a pair of shorted stubs, and a truncated ground plane. The chapter also presents a detailed parametric study to analyze the impact of different design parameters on the antenna's performance.
  • Chapter 6 presents the first non-planar magneto-electric monopole antenna, designed for ultra-wideband applications. The chapter discusses the antenna's geometry, current distribution, and analysis, emphasizing the advantages of using a dual Ί-shaped feed and a truncated ground plane. The chapter also provides a parametric study to investigate the effects of different design parameters on the antenna's performance.

  Schlüsselwörter (Keywords)

  This research explores the field of wideband antenna design, specifically focusing on magneto-electric dipole antennas and their various configurations. Key topics include: bandwidth enhancement techniques, antenna gain optimization, radiation pattern control, circular polarization, end-fire radiation, modified ground planes, novel feeding structures, and parametric analysis. The study investigates the applicability of these antennas for various wireless communication applications, including airborne radar, ultra-wideband, satellite communication, and mobile base stations.

• College: Manipal University
• Grade: A
• Author: Neetu Marwah (Author)
• Publication Year: 2021
• Pages: 122
• Catalog Number: V1139999
• ISBN (eBook): 9783346516350
• ISBN (Book): 9783346516367
• Language: English
• Tags: perspective, magneto-electric, dipole, antennas