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Screening out problems
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04/01/2008
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Phased array antennas comprise multiple modules that can transmit and receive rf or microwave signals. These modules, arranged in groups forming a flat surface, replace a traditional mechanically steered antenna.
Their operation is based on the wave combination of those multiple modules’ output. By arranging the phase of the various outputs, a wavefront is generated, resembling the behaviour of a traditional steered antenna.
There are two kinds of modules: passive and active. Active modules include a power amplifier in the transmit section, as well as a phase shifter and variable attenuator. This is where the active module becomes interesting, because the amplifier component will have to be tested.
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Author
Guillaume De Giovanni
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