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Design of a Dual-Band Broadband Antenna Based on Structure Reuse
Huiru Zhang1,2, Junwen Tang2, Zhongjun Yu1,2
1School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China.
Micromachines
|February 27, 2026
Summary
A novel dual-band antenna reuses a slot antenna as a feeding structure for a microstrip antenna, enhancing bandwidth and reducing complexity. This innovative design achieves significant relative bandwidths at both low and high frequencies.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Traditional antennas often require complex structures to achieve dual-band performance.
- Integrating different antenna types can lead to improved performance but may increase complexity.
- Structure reuse is a promising technique for miniaturization and simplification in antenna design.
Purpose of the Study:
- To propose a novel dual-band broadband antenna utilizing structure reuse.
- To achieve enhanced bandwidth performance in both low and high-frequency bands.
- To reduce the structural complexity of dual-band antennas.
Main Methods:
- Integration of a slot antenna with a microstrip antenna.
- Utilizing the slot antenna as both a radiating element and a feeding structure.
- Introduction of parasitic strips and a U-shaped slot to enhance bandwidth.
- Analysis of current and electric field distributions to understand the working principle.
Main Results:
- The proposed antenna achieves a relative bandwidth of 22.1% at the low-frequency band with a peak gain of 6.5 dBi.
- The antenna achieves a relative bandwidth of 13.6% at the high-frequency band with a peak gain of 4.6 dBi.
- Demonstrated significant reduction in structural complexity through structure reuse.
Conclusions:
- The proposed structure reuse approach effectively creates a compact and efficient dual-band broadband antenna.
- The parasitic strips and U-shaped slot are crucial for achieving wide bandwidths at both frequency bands.
- This design offers a viable solution for applications requiring dual-band operation with reduced complexity.
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