Improvement of the Broadside Radiation Pattern of a Conformal Antenna Array using Amplitude Tapering
关键词:
Adaptive arrays, antenna radiation patterns, conformal antennas, microstrip antenna arrays, phased arrays摘要
In this paper, an algorithm for evaluation of near optimal amplitude excitation coefficients for a conformal array on a wedge-shaped surface has been developed in order to maximize the broadside radiation pattern. The radiation pattern for an eight-element conformal antenna has been analyzed and the derived analytical expressions are used to recover the distorted broadside radiation pattern. A heuristic amplitude tapering algorithm is developed to maximize the broadside radiation pattern through the control of individual voltage variable attenuator of each radiating element in the array. It is shown that with appropriate amplitude tapering, the broadside radiation pattern of the array can be improved without phase correction. The pattern recovery information is used to develop a new 1 x 8 microstrip patch antenna array bent at certain angles on a single curved non-conducting structure and the measured results are shown to agree well with the analytical solutions.
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