Grating lobe suppression in aperiodic phased array antennas composed of periodic subarrays with large element spacing

Abstract

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.

Original language	English
Article number	7054481
Pages (from-to)	76-85
Number of pages	10
Journal	IEEE Antennas and Propagation Magazine
Volume	57
Issue number	1
DOIs	https://doi.org/10.1109/MAP.2015.2397155
Publication status	Published - 1 Feb 2015
Externally published	Yes

Keywords

Aperiodic arrays
grating lobe (GL) suppression
periodic subarrays
phased arrays
unequally spaced subarrays

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

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10.1109/MAP.2015.2397155

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title = "Grating lobe suppression in aperiodic phased array antennas composed of periodic subarrays with large element spacing",

abstract = "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.",

keywords = "Aperiodic arrays, grating lobe (GL) suppression, periodic subarrays, phased arrays, unequally spaced subarrays",

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KW - phased arrays

KW - unequally spaced subarrays

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