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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1063/1.4984219
|2 doi
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|a eng
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|a Azad, Abul K
|e verfasserin
|4 aut
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|a Ultra-thin metasurface microwave flat lens for broadband applications
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a We demonstrate a metasurface-based ultrathin flat lens operating at microwave frequencies. A series of subwavelength metallic split-ring resonators, which are sandwiched between two cross-polarized metallic gratings, are defined to obtain a radially symmetric parabolic phase distribution, covering relative phase differences ranging from 0 to 2.5π radians to create a lens. The tri-layer lens exhibits focusing/collimating of broadband microwaves from 7.0 to 10.0 GHz, with a gain enhancement of 17 dBi at a central wavelength 9.0 GHz while fed by a rectangular horn antenna. The measured focal length agrees reasonably well with design, achieving a 3 dB directionality <4.5° and confirming high-quality beam collimation along the propagation direction. The demonstrated metasurface flat lens enables light-weight, low-cost, and easily deployable flat transceivers for microwave communication, detection, and imaging applications
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|a Journal Article
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|a Efimov, Anatoly V
|e verfasserin
|4 aut
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|a Ghosh, Shuprio
|e verfasserin
|4 aut
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| 700 |
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|a Singleton, John
|e verfasserin
|4 aut
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| 700 |
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|a Taylor, Antoinette J
|e verfasserin
|4 aut
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|a Chen, Hou-Tong
|e verfasserin
|4 aut
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|i Enthalten in
|t Applied physics letters
|d 1998
|g 110(2017), 22 vom: 29. Mai, Seite 224101
|w (DE-627)NLM098165984
|x 0003-6951
|7 nnns
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| 773 |
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|g volume:110
|g year:2017
|g number:22
|g day:29
|g month:05
|g pages:224101
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|u http://dx.doi.org/10.1063/1.4984219
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