Metamaterials for high power reflectarray design

Gregory, Micah D.; Bossard, Jeremy A.; Morgan, Zachary C. P. O.; Cicero, Cooper S.; Easum, John A.; Binion, J. Daniel; Zhu, Danny; Scarborough, Clinton P.; Werner, Pingjuan L.; Werner, Douglas H.; Griffiths, Scott F.; Ketner, Matthew

doi:10.1109/ropaces.2016.7465319

Cited by 2 publications

(1 citation statement)

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“…Therefore, increasing the power levels is the better alternative. Yet this can easily lead power levels incident on the reflector that many RA antennas can no longer survive [37], [38], [39]. Even for more conservative power levels, power handling improvement could be valuable for electrically reconfigurable designs (e.g., using varactordiodes) to prevent component failure.…”

Section: Aperture Efficiency Improving Grin Feedsmentioning

confidence: 99%

Reflectarray Feeds Augmented With Size-Reducing GRIN Lenses for Improved Power Handling and Aperture Efficiency

Whiting

Mackertich-Sengerdy

Chaky

et al. 2023

IEEE Open J. Antennas Propag.

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The feed for reflectarrays and transmitarrays is crucial for determining the overall antenna aperture efficiency, gain, and power handling. In the past, several methods, such as altering the horn shape to achieve higher modes, have been employed to modify the feed radiation pattern to improve these key parameters. However, another approach is to use gradient index (GRIN) lenses, which offer unprecedented control over the radiation pattern and can be used to shrink the overall antenna. In this paper, we demonstrate highly effective approaches for optimizing GRIN lenses to achieve different design objectives including high gain radiation with a compact feed as well as improved aperture efficiency and power handling. Additive manufacturing is employed to fabricate the lenses, and measured results agree well with simulations. Gradient index, lens, optimization, horn antennas, reflectarrays. INDEX TERMS

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Section: Aperture Efficiency Improving Grin Feedsmentioning

confidence: 99%