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A Compact UWB Monopole Antenna with Triple Band Notches
Han Lin1, Zhongyuan Lu1, Zhonggen Wang1
1School of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan 232001, China.
This study introduces an ultra-wideband monopole antenna with triple band notch capabilities. The compact antenna design effectively rejects interference from WiMAX, satellite, and X-band frequencies.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Design
Background:
- Ultra-wideband (UWB) antennas are crucial for high-speed data transmission.
- UWB systems require effective interference mitigation for reliable operation.
- Existing UWB antennas often lack selective frequency rejection capabilities.
Purpose of the Study:
- To design and analyze an ultra-wideband (UWB) monopole antenna.
- To achieve triple band-notch characteristics for interference rejection.
- To validate the antenna's performance through fabrication and measurement.
Main Methods:
- A compact octagonal patch antenna fed by a 50 Ω line was designed.
- An L-shaped stub, inverted C-shaped slot, and U-shaped structures were integrated.
- Antenna parameters including S-parameters, VSWR, and radiation properties were measured.
Main Results:
- The antenna exhibited resonances at 2.94 GHz with a compact size (40 mm × 29 mm).
- Three distinct band notches were achieved at 3.22-3.83 GHz (WiMAX), 4.49-5.05 GHz (INSAT), and 7.49-8.02 GHz (X-band).
- Lower efficiency and gain within notched bands confirmed good interference rejection.
Conclusions:
- The proposed UWB antenna successfully demonstrates triple band-notch functionality.
- The design offers effective interference suppression for specific frequency bands.
- The fabricated antenna meets the design objectives for UWB applications requiring frequency selectivity.
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