Minimum Q of the element in an infinite phased array

A general method has been presented for evaluating the Q of the element in an infinite array environment. In essence the method consists of transforming the active array fields to a unit cell representation in terms of Floquet modes where it is easy to calculate the reactive time-average stored ener...

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Bibliographic Details
Main Authors: Tomasic, B., Steyskal, H.
Format: Conference Proceeding
Language:English
Subjects:
Antenna arrays
Bandwidth
Force measurement
Geometry
Magnetic analysis
Phased arrays
Radar antennas
Sensor arrays
Ultra wideband antennas
Ultra wideband radar
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Summary:A general method has been presented for evaluating the Q of the element in an infinite array environment. In essence the method consists of transforming the active array fields to a unit cell representation in terms of Floquet modes where it is easy to calculate the reactive time-average stored energy and radiated power. Although the method was demonstrated on a simple canonical 2D array, it gives first order min Q-values possible as a function of array geometry and scan. It demonstrated that for small element spacings, the min Q is lower or comparable to the single element Q in free space.
ISSN:1522-3965
DOI:10.1109/APS.2007.4395451