Phase Shifters Or Optoelectronic Delay Line
Application To Sequential Analysis Of Space
In Adaptive Phased Array Antennas
Author(s)
Z. Bielecki, W. Kołosowski, M. Muszkowski & E. Sędek
Abstract
In the case of the increasing number of frequency users, more attention is paid to
effective usage of allocated frequency bands by operators and special services.
Adaptive space filtering is a great advance in phase array antenna application.
The main advantage of this kind of phased array antenna is the flexible antenna
characteristics shaped possibility by amplitude and phase changes of antenna
supply signals. Dynamic beam shape control needs to apply digital phase
shifters. The resolution of phase shifters depends on a number of control bits.
The dependence of phase shifter resolution on directional antenna characteristics
is presented in this paper. Because of the large cost of phase shifters and
attenuators applied to adaptive phased array antennae, the optoelectronic
approach has been presented. In this case, high resolution beam positioning is
obtained, which is not possible in digital phase shifters application.
Keywords: array antenna, adaptive phased arrays antenna.
1 Introduction
Application of adaptive phased arrays antennas provides detection of required
signals and attenuation of noise (reference) signals. The main feature of this kind
of antenna is flexible and continuous shaping of directional characteristics by the
change of amplitude and phase relations between signals of different antenna
elements. Practical applications of adaptive antennas need to solve difficult
technological problems like selection of transmitter-receiver modules, phase
shifters, power dividers and connection lines. A number of those components can
exceed a few hundreds. Rapid development of optoelectronic components,
Keywords
array antenna, adaptive phased arrays antenna.
Related Book
Other papers in this volume
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