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Abstract:
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Digital beamforming (DBF) is the integration between antenna technology and
digital technology. It was first developed by sonar and radar communities. Nowadays
applications of DBF technology are spreading quickly and soon it will appear in many
wireless communication devices.
The thesis investigates the characteristics of Chebyshev beamforming algorithm to suppress
the sidelobe level (SLL) on planar antenna arrays. Firstly, a single planar patch antenna has
been designed and simulated to generate its radiation pattern data. A group of four of these
antennas forms a 2×2 planar antenna array as the fundamental array. The array of N×N
elements can be formed from the fundamental array. The array factor of the planar arrays has
been calculated. The Chebyshev beamforming algorithm has been applied to this planar
antenna array. The software code has been developed. As the results, the beam of this planar
array can be formed with reduced sidelobe level to maximum -40 dB and the trade-off value
is -20 dB and -25dB of 8×8 and 16×16 planar antenna array, respectively. |