Hybrid Beam Former for Distributed-Aperture Electronically Steered Arrays

This letter presents a concept for a hybrid beam former that is composed of two stages: an RF stage with limited scanning steps and a digital stage that is capable of steering multiple beams of different channels in all required directions. The two-stage beam former uses fewer A/D converters than it...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2010, Vol.9, p.678-681
Main Authors: Zaghloul, Amir I, Kilic, Ozlem
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Aperture antennas
Arrays
Beam forming
Beams (radiation)
Channels
conformal arrays
Digital
electronic scanning
Hidden Markov models
Military communication
Optical beams
Phased arrays
Polarization
Radio frequencies
Radio frequency
Scanning
Steering
Two dimensional
Two dimensional displays
Unmanned aerial vehicles
vehicle antennas
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Summary:This letter presents a concept for a hybrid beam former that is composed of two stages: an RF stage with limited scanning steps and a digital stage that is capable of steering multiple beams of different channels in all required directions. The two-stage beam former uses fewer A/D converters than its all-digital counterpart and lower losses than the all-RF beam former. Examples are given for multifaceted or conformal apertures. Although the examples are limited to one-dimensional (1-D) scanning, the concept is valid for two-dimensional (2-D) scanning as well.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2010.2053512