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Analysis of Beamforming Antenna for Practical Indoor Location-Tracking Application
Sun-Woong Kim1, Dong-You Choi2
1IT Research Institute, Chosun University, Gwangju 61452, Korea.
This study introduces a novel beamforming antenna for ultra-wideband radar, enhancing target tracking capabilities over wide ranges. The new antenna design electronically steers its main beam, improving performance in indoor location applications.
Area of Science:
- Electrical Engineering
- Antenna Theory
- Radar Systems
Background:
- Conventional ultra-wideband (UWB) radar systems face limitations in wide-range target tracking due to narrow antenna beamwidths.
- Effective tracking requires antennas capable of adapting their directional focus.
Purpose of the Study:
- To develop and validate a beamforming antenna system for enhanced wide-range target tracking in UWB radar.
- To electronically control the antenna's main beam for improved location tracking performance.
Main Methods:
- Fabrication of a beamforming antenna by integrating a 1x4 linear array antenna with a 4x4 Butler matrix.
- Utilizing laminated TRF-45 substrates for Butler matrix construction and Taconic TLY for the tapered-slot antenna.
- Characterization of antenna impedance bandwidth (VSWR ≤2 from 1.45-5.78 GHz) and radiation patterns.
Main Results:
- The fabricated antenna achieved a wide impedance bandwidth of 4.32 GHz.
- Directional radiation patterns suitable for precise location tracking were observed.
- The beamforming antenna demonstrated four distinct beamforming angles.
Conclusions:
- The proposed beamforming antenna effectively addresses the limitations of conventional UWB radar for wide-range target tracking.
- The system is validated for indoor location tracking applications when integrated with impulse-radio UWB radar modules.
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