Phased Arrays Using Odd Phase Distribution of the Radiating Elements

We show generation of an asymmetric far-field radiation pattern for uniform linear and planar arrays using phase only excitations that belong to a family of odd functions of the form \frac{{{({2{\boldsymbol{\pi }}{{\boldsymbol{b}}_0}})}^{2{\boldsymbol{n}} + 1}}({{{\boldsymbol{x}}^{2{\boldsymbol{n}}...

Full description

Saved in:
Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2019-05, Vol.18 (5), p.891-895
Main Authors: Kadlimatti, Ravi, Parimi, Patanjali V.
Format: Article
Language:English
Subjects:
Amplitude modulation
Antenna radiation patterns
Asymmetric pattern
Asymmetry
beamforming
Chebyshev approximation
Clutter
Directivity
Elevation
Excitation
Far fields
pattern synthesis
Phase distribution
Phased arrays
Quadrants
radiation pattern
sidelobe reduction
Sidelobes
Skewed distributions
Two dimensional displays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We show generation of an asymmetric far-field radiation pattern for uniform linear and planar arrays using phase only excitations that belong to a family of odd functions of the form \frac{{{({2{\boldsymbol{\pi }}{{\boldsymbol{b}}_0}})}^{2{\boldsymbol{n}} + 1}}({{{\boldsymbol{x}}^{2{\boldsymbol{n}} + 1}} + {{\boldsymbol{y}}^{2{\boldsymbol{n}} + 1}}})}}{{2{\boldsymbol{n}} + 1}}, where {\boldsymbol{n}} = 1,2,3, \ldots. The mainlobe and the dominant sidelobes are contained in one quadrant of the azimuthal plane, whereas the sidelobes in the remaining three quadrants are reduced significantly (by 9 dB at least, for the considered array size). In comparison, such an asymmetric radiation pattern is unlike the symmetric pattern produced by a conventional uniform phased array. The asymmetrical sidelobe distribution is achieved while maintaining the mainlobe intensity and beamwidth. In addition to the odd phase excitations, applying the Chebyshev amplitude modulation further enhances the sidelobe asymmetry, also increasing the array directivity. The designed phased arrays have good scan performance from - 45^\circ to 45^\circ in the elevation and azimuth planes with an ability to maintain constant directivity. Such asymmetrical radiation patterns could easily reject interfering signals and ground clutter, which is beneficial in many radar and communications applications.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2019.2904907