NDLI: Affine transformation for synthesis of low sidelobe patterns in planar array antennas with a triangular element grid using the IFT method

Content Provider	IET Digital Library
Author	Keizer, Will P. M. N.
Abstract	This study deals with the affine transformation that is used to convert the triangular element grid of a planar phased array antenna into a square one. By means of this kind of transformation, it is possible to apply the iterative Fourier transform (IFT) method to synthesise low sidelobe tapers for array antennas featuring a triangular grid. Combination of the IFT method with an affine transformation allows the synthesis of low sidelobe tapers of which the peak sidelobe level does not vary with changing frequency and/or altering main beam position. The considered affine transformation was already briefly addressed in earlier publications of this author. In this study detailed information is given on its use in combination with the IFT method. Examples to demonstrate the effectiveness of the combination affine transformation and the IFT method for triangular grid array antennas are given. It will be shown that the peak sidelobe levels of the obtained tapers are invariant with frequency and scan angle when all far-field directions of the array factor are involved in the low sidelobe taper synthesis.
Starting Page	830
Ending Page	834
Page Count	5
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 8, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.0050
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-03-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Affine Transformation Affine Transforms Antenna Array Antenna Radiation Pattern Fourier Transforms IFT Method Integral Transforms in Numerical Analysis Interpolation And Function Approximation Iterative Fourier Transform Method Iterative Method Low Sidelobe Taper Synthesis Low Sidelobe Taper Synthesis Pattern Numerical Analysis Peak Sidelobe Level Planar Antenna Array Planar Array Antenna Triangular Element Grid Array Antenna
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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