An Inductor-Loaded Single-Port Planar Dual-Broadband Antenna with Stable Gains.

Area of Science:

• Electrical Engineering
• Antenna Theory
• Wireless Communications

Background:

• Mobile communication systems require efficient base-station antennas capable of operating across multiple frequency bands.
• Existing antenna designs often face challenges in achieving wide bandwidths and compact form factors simultaneously.

Purpose of the Study:

• To develop and characterize a novel single-port dual-wideband base-station antenna for enhanced mobile communication systems.
• To investigate the effectiveness of inductor-loading technology in achieving wide bandwidths and stable gain in a compact antenna design.

Main Methods:

• A single-port antenna was designed incorporating loop and stair-shaped structures with lumped inductors for dual-wideband operation.
• The antenna's operational principles were analyzed, and the impact of lumped inductors on performance was systematically studied.
• Performance was validated through measurements of operational bands, relative bandwidths, radiation patterns, and gain stability.

Main Results:

• The antenna achieved dual-wideband operation from 0.64 GHz to 1 GHz (43.9% relative bandwidth) and 1.59 GHz to 2.82 GHz (55.8% relative bandwidth).
• Broadside radiation patterns were observed across both operating bands.
• Stable gain performance was achieved with a variation of less than 2.2 dB.

Conclusions:

• The proposed antenna design effectively meets the requirements for dual-wideband operation in mobile communication systems.
• Inductor-loading technology is demonstrated as a viable and effective method for designing compact antennas with wide bandwidths and stable gain.
• The developed antenna offers a promising solution for next-generation wireless communication infrastructure.