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Array Antenna Limitations
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DOI：10.1109/LAWP.2013.2291362.png)
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Abstract
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This letter defines a physical-bound-based array figure of merit for both single and multiband array antennas. It provides a measure to compare their performance with respect to return loss, bandwidth(s), thickness of the array over the ground plane, and scan range. The result is based on a sum-rule result of Rozanov-type for linear polarization. For single-band antennas, it extends an existing limit for a given fixed scan-angle to include the whole scan range of the array, as well as the unit-cell structure in the bound. The letter ends with an investigation of the array figure of merit for some wideband and/or wide-scan antennas with linear polarization. We find arrays with a figure of merit >0.6 that empirically defines high-performance antennas with respect to this measure.
Keywords:
All-in-one arrays
antenna theory
array antenna limitations
bandwidth limitation
electromagnetic analysis
figure of merit
physical bound
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