Grating Lobe Suppression With Discrete Dipole Element Antenna Arrays
- 20 November 2015
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Antennas and Wireless Propagation Letters
- Vol. 15, 1234-1237
- https://doi.org/10.1109/lawp.2015.2502902
Abstract
Antenna arrays with interelement spacing as integral multiple of wavelength λ have been absent in practical implementations despite their highly directive main lobe; the disuse is primarily attributed to the presence of grating lobes. This letter proposes a modification in a linear antenna array whereby the grating lobes are suppressed by up to 100% with an additional improvement in the directivity of main-lobe and reduction in other sidelobe levels. A new array factor is synthesized by replacing the individual elements in a linear array with a pair of elements called discrete dipole elements (DDEs); a background theory of spatial hard windowing is proposed for the synthesis of array factor. Array factors of linear array made of eight DDEs are compared to those of an eight-element linear isotropic array to validate the claims. The proposed DDE array is then fabricated using monopole antennas; a good agreement between measured, simulated, and analytical results is seen.Keywords
Funding Information
- Department of Science and Technology-Government of India (SB/EMEQ-319/2013)
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