Dual-Polarized Antenna Design for Base Station Applications

Dual-polarized antennas form a cornerstone of modern base station technology by supporting orthogonal electric-field components within a single aperture. This arrangement doubles the available communication channels, enhances spectral efficiency and mitigates multipath fading in urban and rural deployments. Contemporary designs strive for wide impedance bandwidths to cover 2G through 5G sub-6 GHz bands, compact profiles for easy tower mounting, high port isolation to preserve signal integrity and stable radiation patterns across frequency. Key innovations include shaped radiators such as spline-edged bowties or intersected resonators, artificial magnetic conductor (AMC) reflectors to reduce antenna–ground spacing, and shared-dipole architectures to shrink footprint and simplify feeding networks. Advanced arrays integrate beam-steering capability and multi-sector coverage within a single panel, enabling adaptive traffic management and improved cell capacity. Collectively, these developments underpin reliable ubiquitous connectivity in increasingly dense and heterogeneous wireless networks.

Research from Nature Portfolio

Recent studies have demonstrated a compact dual-band beam-steering array for 5G sub-6 GHz base stations that employs printed U-shaped dipoles above a metal reflector. By etching parasitic patches on the dipole arms and optimising reflector size and dipole height, peak gains of 11.5 dB at 2.2 GHz and 14.5 dB at 3.8 GHz were achieved, with beam steering up to 20° via phase-shifted excitation. The design uniquely provides dual-sector coverage per panel, enhancing capacity without increasing the number of RF chains, and meets stringent requirements for gain, bandwidth, isolation and compactness in a single eight-port module.

Dual-Polarized Antenna Design for Base Station Applications publication trend

The graph below shows the total number of articles in dual-polarized antenna design for base station applications across all publications each year (not limited to Nature Index journals).

Technical terms

Dual polarization: Transmission and reception of two orthogonal electromagnetic field components to double channel capacity and reduce multipath effects.

Port isolation: A measure of how well two antenna ports are decoupled, critical to prevent cross-talk and preserve signal purity.

Artificial magnetic conductor (AMC): A metamaterial surface that reflects incident waves in phase, allowing antennas to be mounted closer to ground planes without performance degradation.

Beam steering: Electronic control of the radiation pattern direction via phase-shifting of array elements, enabling dynamic coverage adjustment.

Half-power beamwidth (HPBW): The angular width over which the radiated power remains above half its maximum, indicating beam directivity and coverage.

References

1. A Review on 5G Sub-6 GHz Base Station Antenna Design Challenges. Electronics (2021).
2. A dual-band high-gain beam steering antenna array for 5G sub-6 GHz base station. Scientific Reports (2024).
3. A Compact Broadband Dual-Polarized Antenna Array for Base Stations. IEEE Antennas and Wireless Propagation Letters (2018).
4. A Low-Profile Dual-Band Dual-Polarized Antenna With an AMC Reflector for 5G Communications. IEEE Access (2020).
5. Compact Dual-Polarized Shared-Dipole Antennas for Base Station Applications. IEEE Transactions on Antennas and Propagation (2018).