Antenna arrays show increased side lobes at increasing beam steering angles in the near field. Conventional techniques such as inhomogenous but symmetric amplitude illuminations, to assure a certain side lobe suppression level, do not reduce the side lobes sufficiently for the near field case. In this paper, a new additional asymmetric amplitude weighting function in combination with Dolph Chebyshev is proposed which can further improve the side lobe suppression almost over the whole side lobe range, to approximately −35 dB at ϕ = 0° and ϕ = 180° for the steering angle of 15° and 30°.
Improved near field focusing of antenna arrays with novel weighting coefficients
2014-09-01
930894 byte
Conference paper
Electronic Resource
English
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