Grating Lobe Suppression in Aperiodic Phased Array Antennas Composed of Periodic Subarrays with Large Element Spacing

The techniques of grating lobe (GL) suppression in planar phased array antennas composed of periodic subarrays with rectangular or triangular grids with large element spacing are considered. GL suppression is achieved using an aperiodic arrangement of subarrays. This approach provides a means to dec...

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Bibliographic Details
Published in:IEEE antennas & propagation magazine 2015-02, Vol.57 (1), p.76-85
Main Authors: Krivosheev, Yury V., Shishlov, Alexander V., Denisenko, Vladimir V.
Format: Magazinearticle
Language:English
Subjects:
Antenna radiation patterns
Apertures
Gratings
Optimization
Phased arrays
Planar arrays
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Summary:The techniques of grating lobe (GL) suppression in planar phased array antennas composed of periodic subarrays with rectangular or triangular grids with large element spacing are considered. GL suppression is achieved using an aperiodic arrangement of subarrays. This approach provides a means to decrease GLs without a significant increase in structural complexity relative to periodic arrays; moreover, other antenna parameters do not essentially change compared with periodic arrays. Estimations of maximum GL suppression are presented. Antenna characteristics such as sidelobe level, beam efficiency, and aperture efficiency are also considered. The influences of element radiation pattern and amplitude tapering are analyzed. Examples of radiation patterns of such phased arrays are given.
ISSN:1045-9243
1558-4143
DOI:10.1109/MAP.2015.2397155