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A Miniaturized Arc Shaped Near Isotropic Self-Complementary Antenna for Spectrum Sensing Applications.

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This study introduces a novel arc-shaped antenna for spectrum sensing. The antenna achieves a near-isotropic radiation pattern and wide bandwidth, making it suitable for advanced sensing applications.

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Area of Science:

  • Electromagnetics and Wave Propagation
  • Antenna Theory and Design
  • Wireless Communication Systems

Background:

  • Spectrum sensing is crucial for efficient wireless communication.
  • Existing antennas often lack the required wide bandwidth and isotropic radiation for comprehensive spectrum sensing.
  • Self-complementary antennas offer potential for broadband operation.

Purpose of the Study:

  • To design and validate an arc-shaped, near-isotropic, self-complementary antenna.
  • To achieve a wide impedance bandwidth and a radiation pattern suitable for spectrum sensing.
  • To compare the proposed antenna's performance against existing designs.

Main Methods:

  • Design of an arc-shaped dipole with adjustable horizontal and vertical arms.
  • Electromagnetic simulation and experimental validation.
  • Characterization of radiation pattern, impedance bandwidth, gain, efficiency, and size.

Main Results:

  • Achieved a 146% impedance bandwidth (2.4-18.4 GHz) for VSWR ≤ 2.
  • Demonstrated a near-isotropic radiation pattern.
  • Attained a maximum radiation efficiency of 92%.
  • FR4 substrate (εr = 4.4, h = 1.6 mm) utilized.

Conclusions:

  • The proposed arc-shaped antenna exhibits excellent performance metrics.
  • Its near-isotropic pattern and wide bandwidth make it ideal for spectrum sensing.
  • The design shows significant advantages over previously reported antennas.