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A new Dual-Mode Conical Horn Antenna (DM-CHA) integrates a Dual-Mode Converter (DMC) with a Conical Horn Antenna (CHA) for 5G millimeter wave applications. This system enables precise angular detection for high data rates in satellite communications.

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Area of Science:

  • Electromagnetics and Wave Propagation
  • Antenna Theory and Design
  • Millimeter Wave Technology

Background:

  • 5G communication systems require advanced antenna solutions for millimeter wave frequencies.
  • Monopulse operation is crucial for accurate angular detection in radar and communication systems.
  • Existing antenna systems face challenges in achieving high gain and efficient mode conversion at K-band.

Purpose of the Study:

  • To present a novel three-dimensional full metal system, the Dual-Mode Conical Horn Antenna (DM-CHA).
  • To integrate a Dual-Mode Converter (DMC) with a Conical Horn Antenna (CHA) for monopulse operation at K-band (37.5-39 GHz).
  • To enable high data rate 5G satellite communications through enhanced angular of arrival detection.

Main Methods:

  • The Dual-Mode Converter (DMC) was designed to excite specific modes (TE11cir or TE01cir) in the CHA's circular waveguide.
  • The DMC was fabricated using Computer Numerical Control (CNC) subtractive manufacturing.
  • The Conical Horn Antenna (CHA) was fabricated using Direct Metal Laser Sintering (DLMS) additive manufacturing.
  • The integrated DM-CHA system was rigorously tested, comparing simulation and measurement results for key performance metrics.

Main Results:

  • The fabricated DM-CHA system successfully radiated sum (Σ) and difference (Δ) patterns for monopulse operation.
  • The integration prevented higher-order mode propagation and mode mutual coupling.
  • The system demonstrated up to ±11° per beam in angular of arrival detection.
  • Return loss, isolation, radiation pattern, and gain were validated through simulation and measurement.

Conclusions:

  • The novel DM-CHA system offers a viable solution for 5G millimeter wave applications.
  • The combination of DMC and CHA, fabricated with advanced manufacturing techniques, achieves effective monopulse operation.
  • The system's performance in angular detection supports high data rate requirements for future satellite communications.