Control of Orbital Angular Momentum Regimen by Modulated Metasurface Leaky-Wave Antennas
In this article, we present the design procedure of modulated metasurface leaky-wave antennas (MMLWAs) to generate coaxial superposition of vortex beams with several orbital angular momentum (OAM) states. Based on the flat optics (FO) technique and aperture field estimation (AFE) method, an analytic...
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| Veröffentlicht in: | IEEE transactions on antennas and propagation 2022-11, Vol.70 (11), p.10166-10176 |
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| creator | Amini, Amrollah Oraizi, Homayoon |
| description | In this article, we present the design procedure of modulated metasurface leaky-wave antennas (MMLWAs) to generate coaxial superposition of vortex beams with several orbital angular momentum (OAM) states. Based on the flat optics (FO) technique and aperture field estimation (AFE) method, an analytical framework is proposed to facilitate the implementation of MMLWAs generating multiple topological charges in the OAM regimen. Furthermore, using the spectral analysis that has been derived from the proposed model, we have shown that the symmetry of aperture shape can affect the purity of the mode. Also, the perfectly symmetric circular shape is introduced as an ideal choice for high-purity vortex generation. This single aperture antenna with embedded monopole feed can be an appropriate alternative to more complex vortex beam generators such as spiral phase plates and circular antenna arrays. The validity of the proposed analytical method has been studied by designing two structures with petal-like vortex beams. |
| doi_str_mv | 10.1109/TAP.2022.3191758 |
| format | Article |
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Based on the flat optics (FO) technique and aperture field estimation (AFE) method, an analytical framework is proposed to facilitate the implementation of MMLWAs generating multiple topological charges in the OAM regimen. Furthermore, using the spectral analysis that has been derived from the proposed model, we have shown that the symmetry of aperture shape can affect the purity of the mode. Also, the perfectly symmetric circular shape is introduced as an ideal choice for high-purity vortex generation. This single aperture antenna with embedded monopole feed can be an appropriate alternative to more complex vortex beam generators such as spiral phase plates and circular antenna arrays. 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The validity of the proposed analytical method has been studied by designing two structures with petal-like vortex beams.</description><subject>Angular momentum</subject><subject>Antenna arrays</subject><subject>Antennas</subject><subject>Apertures</subject><subject>Electron beams</subject><subject>Leaky waves</subject><subject>Leaky-wave antennas</subject><subject>Metasurfaces</subject><subject>modulated metasurface antennas</subject><subject>Modulation</subject><subject>Optical surface waves</subject><subject>Optics</subject><subject>orbital angular momentum (OAM)</subject><subject>Phase plates</subject><subject>Purity</subject><subject>Spectrum analysis</subject><subject>Surface impedance</subject><subject>Surface waves</subject><subject>Symmetry</subject><issn>0018-926X</issn><issn>1558-2221</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kEtLAzEUhYMoWKt7wU3A9dQ8J8myFF_QUpGK3YVkJilTpzM1yQj990ZaXN3XOfdePgBuMZpgjNTDavo2IYiQCcUKCy7PwAhzLgtCCD4HI4SwLBQp15fgKsZtLplkbATWs75LoW9h7-Ey2CaZFk67zdCaABf9znVp2MF3t2lyCu0h9-o8S66GC5dMHII3lYNzZ74Oxaf5cdmcXNeZeA0uvGmjuznFMfh4elzNXor58vl1Np0XFVE45Zc4Z8rXjCvLSoN8JZEnHHNrsJS8JhWltCxNbUtRUsxr4S3HipVUVcaamo7B_XHvPvTfg4tJb_shdPmkJoIKLihHPKvQUVWFPsbgvN6HZmfCQWOk__jpzE__8dMnftlyd7Q0zrl_uZJUSETpL81ia0w</recordid><startdate>20221101</startdate><enddate>20221101</enddate><creator>Amini, Amrollah</creator><creator>Oraizi, Homayoon</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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Based on the flat optics (FO) technique and aperture field estimation (AFE) method, an analytical framework is proposed to facilitate the implementation of MMLWAs generating multiple topological charges in the OAM regimen. Furthermore, using the spectral analysis that has been derived from the proposed model, we have shown that the symmetry of aperture shape can affect the purity of the mode. Also, the perfectly symmetric circular shape is introduced as an ideal choice for high-purity vortex generation. This single aperture antenna with embedded monopole feed can be an appropriate alternative to more complex vortex beam generators such as spiral phase plates and circular antenna arrays. 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| subjects | Angular momentum Antenna arrays Antennas Apertures Electron beams Leaky waves Leaky-wave antennas Metasurfaces modulated metasurface antennas Modulation Optical surface waves Optics orbital angular momentum (OAM) Phase plates Purity Spectrum analysis Surface impedance Surface waves Symmetry |
| title | Control of Orbital Angular Momentum Regimen by Modulated Metasurface Leaky-Wave Antennas |
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