Abstract
In this paper, the linear antenna array is designed by the usage of Woodward–Lawson method. The design procedure fits antenna array radiation pattern to a predefined/required radiation mask. In this study will be investigated the possibility of powering off some antenna elements without modifying the behavior and power ratio of the elements which remains on. The aim of powering off antenna elements is to reduce power consumption of the designed array antenna and to reduce power dissipation problems on modern full digital beam forming architecture. The choice of binary operation of antenna element (on/off) reduces computational effort required for complex beam forming techniques. The results can be stored on look-up tables, in order to be recalled on demand by antenna operator. There are used two different metrics to identify how close, to the required design, is the modified antenna pattern. Euclidean and Hausdorff distances are both used as score of the modified array performance. The obtained solutions shows the applicability of binary operations on existing antenna array and the metric can be effectively used as ranking solutions.
Highlights
Array antennas are a set of two or more elements spread in one, two or three direction in the space
We will do the analysis of powering off some random elements to see the changes in the radiation model and how much it diverges from the desired model showed from the mask
Instead of designing antenna array which focus in finding the best power feeding distribution network ratio for each element [12][13][14][15], in this paper, we will choose powering on or off selected antenna element and as well will be traced and scored modifications to the radiation pattern
Summary
Array antennas are a set of two or more elements (with element we mean individual antenna) spread in one, two or three direction in the space. To score the obtained pattern output, will be used two different metrics: Euclidean and Hausdorff distance Both metrics permits to score how close to the desired radiation, is the modified array. A preliminary linear array will be designed to demonstrate the possibility of powering off part of array elements, and the relative pattern feet to a predefined mask. Our aim is to get this array factor by not feeding (powering off) some elements of the antenna and to compare the obtained pattern with the mask using both methods. This paper is organized as follows: Section 2 describes mathematical definitions for linear antenna array design based on W-L method, followed by definitions of both metrics (Euclidean and Hausdorff) which are used to score how close to required pattern is the designed and modified antenna pattern.
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