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Updated: Oct 30, 2025

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Design of a Single-Layer ±45° Dual-Polarized Directional Array Antenna for Millimeter Wave Applications.

Qinyi Lv1, Yu-Hang Yang1, Shi-Gang Zhou1

  • 1School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710129, China.

Sensors (Basel, Switzerland)
|July 2, 2021
PubMed
Summary
This summary is machine-generated.

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A novel dual-polarized directional array antenna for millimeter wave (mm-wave) applications was developed. This antenna offers a simple structure and directional radiation, making it suitable for mm-wave systems.

Area of Science:

  • Electrical Engineering
  • Antenna Theory
  • Electromagnetics

Background:

  • Millimeter wave (mm-wave) frequencies are crucial for high-bandwidth communication systems.
  • Directional antennas with dual-polarization capabilities are essential for efficient mm-wave applications.
  • Existing antenna designs may face challenges in achieving both directional radiation and low cross-polarization at mm-wave frequencies.

Purpose of the Study:

  • To design and demonstrate a single-layer, ±45° dual-polarized directional array antenna for mm-wave applications.
  • To leverage orthogonal circularly polarized (CP) wave multiplexing for linear polarization control.
  • To achieve suppressed cross-polarization and directional radiation characteristics.

Main Methods:

  • Utilizing a series-fed dual CP array fed with equal amplitudes.
Keywords:
dual circularly polarized (CP)dual linearly polarizedmillimeter wave (mm-wave)single layer

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  • Adjusting the feeding phase difference to achieve ±45° linear polarization orientations.
  • Employing side-by-side placement of two series-fed arrays to suppress cross-polarization.
  • Fabricating and measuring a prototype antenna operating at 30 GHz.

    • Main Results:

    • The designed antenna successfully radiates a linearly polarized wave with ±45° polarization orientations.
    • Directional radiation is achieved through simultaneous excitation of the series-fed array ports.
    • Effective suppression of the cross-polarization level was observed.
    • The fabricated prototype demonstrated a working bandwidth of approximately 3.5% at 30 GHz.

    Conclusions:

    • The proposed single-layer ±45° dual-polarized directional array antenna is a viable solution for mm-wave applications.
    • Its simple structure and directional radiation properties make it a competitive candidate.
    • The antenna design effectively utilizes CP wave multiplexing for polarization control and cross-polarization suppression.