Optoelectronic System For Phase Array Antenna
Beam Steering
Author(s)
E. Sędek, Z. Bielecki, M. Muszkowski, W. Kołosowski,
G. Różański & M. Wnuk
Abstract
This paper presents a system for optoelectronic beam steering of a phase antenna
array. The microwave signal from an RF generator controlled by a pulse
generator is transmitted to the electrical input of an optical elevation control unit,
which generates N microwave signals with independent amplitude and phase.
The control unit utilizes an optical wave from a laser. All outputs of those
control units are connected to inputs of N optical azimuth control units, which
provide M linear element antennas control. Those units utilize an optical wave
from a second laser. This way an M x N element of a planar antenna control is
provided. The presented method is compared with the classical and electronic
method, which consists of multi-bits microwave phase shifters for producing an
electronic scanning effect. On the basis of this concept we realized 16-element
linear antenna array printed on a dielectric substrate fully controlled by an
optoelectronic system. A tuned wavelength laser in the range 1520–1600 nm and
10 mW optical output power has been used as an optical signal source. The
optical signal is modulated by a microwave signal. The applied modulator
operates in the third optical window, allowing optical signal modulation to
10GHz. Very high resolution and an excellent accuracy of the antenna beam
positioning can be achieved. The optimal technique depends on the number of
antenna elements, which implicates beam width. The presented method is
preferred for very narrow antenna beams.
Keywords: optoelectronic system, phase array antenna, beam steering.
Keywords
optoelectronic system, phase array antenna, beam steering.
Related Book
Other papers in this volume
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