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AN ALTERNATIVE APPROACH TO DESIGN AND ANALYSIS OF BROADBAND BEAMSPACE ADAPTIVE ARRAYS

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Author(s): A. S. SRINIVASA RAO | P. MALLIKARJUNA RAO | E. JAYA | V. ASHOK KUMAR

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 3;
Issue: 9;
Start page: 7029;
Date: 2011;
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Keywords: Antenna arrays | Linear arrays | Broadband antennas | Adaptive antennas | Constant beam width | Interference rejection | filter – and – sum beamformer.

ABSTRACT
The beamwidth of a linear array depends on number of elements in the array and frequency of the input signal. At present designing of wideband antennas and beamformers became important, in the fields of microphone arrays intended for teleconferencing, in transmitting or receiving spread spectrum signals, crip signals etc. A beamspace adaptive planar array for broadband beamforming is proposed based on the filter – and - sum beamforming technique. A detailed design method was provided for both the linear arrays and the adaptivearrays and simulation results are provided for the proposed method. Our proposed method is used to demonstrate that the beam-space adaptive array can suppress interference signals having a wide fractional bandwidth and that the array has fast convergence.
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