Abstract
Phased array
antennas consist of several radiating elements arranged and interconnected to
produce directional radiation pattern.
Array antennas
have wide application in radar and radio communication, to day arrays at
microwave frequencies and above are used extensively in mobile and sat
communication systems.
The phased array
antenna offers a unique capability of electronic scanning of the main beam in
the space by changing the phase of the exciting currents in each element of the
array.
Array antennas
can be classified according to their distribution such as linear, planar,
circular and conformal array.
In this paper
cylindrical conformal array antennas are considered, some significant design
parameters that affect the radiation patterns and directivity were evaluated
and discussed. These parameters includes radius of the cylinder and the number
of rings M, number of element radiators N in each ring as well as the spacing
between the rings d, and the scanning angle qo,
in addition to the current excitation amplitudes and phases.
A mat-lab
programs have been prepared to compute and plot the radiation patterns and
their directivity in three dimensions and in tow dimension for various cases of
the design parameters.
A numerical
results of the directivity and half power beam width with the variation of the
different design parameters can give the suitable and optimal solution of the
array antenna design for different application.
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