Radially Polarized Annular-Slot Leaky-Wave Antenna for Three-Dimensional Near-Field Microwave Focusing

Darwin Blanco; Jose Luis Gómez-Tornero; Eva Rajo-Iglesias; Nuria Llombart Juan

doi:10.1109/LAWP.2014.2311854

Radially Polarized Annular-Slot Leaky-Wave Antenna for Three-Dimensional Near-Field Microwave Focusing

Darwin Blanco, Jose Luis Gómez-Tornero, Eva Rajo-Iglesias, Nuria Llombart Juan

Tera-Hertz Sensing

Research output: Contribution to journal › Article › Scientific › peer-review

26 Citations (SciVal)

Abstract

Microwave three-dimensional near-field focusing with radial polarization using a holographic annular-slot antenna is demonstrated in this letter. This radial polarization can generate axially polarized focused fields in the near-field regime, which complements the more conventional synthesis of transversally polarized near-field focusing patterns. Moreover, it is shown that more symmetrical focal region is obtained thanks to the radial polarization for similar Fresnel number N and operation frequency. The theory is demonstrated with experiments for a design operating at 10 GHz, with aperture diameter D=6λ and a Fresnel number N=4.

Original language	English
Article number	6767070
Pages (from-to)	583-586
Number of pages	4
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	13
DOIs	https://doi.org/10.1109/LAWP.2014.2311854
Publication status	Published - 2014

Keywords

Focal depth
leaky-wave antennas
three-dimensional near-field focused microwave antennas

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10.1109/LAWP.2014.2311854

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title = "Radially Polarized Annular-Slot Leaky-Wave Antenna for Three-Dimensional Near-Field Microwave Focusing",

abstract = "Microwave three-dimensional near-field focusing with radial polarization using a holographic annular-slot antenna is demonstrated in this letter. This radial polarization can generate axially polarized focused fields in the near-field regime, which complements the more conventional synthesis of transversally polarized near-field focusing patterns. Moreover, it is shown that more symmetrical focal region is obtained thanks to the radial polarization for similar Fresnel number N and operation frequency. The theory is demonstrated with experiments for a design operating at 10 GHz, with aperture diameter D=6λ and a Fresnel number N=4.",

keywords = "Focal depth, leaky-wave antennas, three-dimensional near-field focused microwave antennas",

author = "Darwin Blanco and G{\'o}mez-Tornero, {Jose Luis} and Eva Rajo-Iglesias and {Llombart Juan}, Nuria",

year = "2014",

doi = "10.1109/LAWP.2014.2311854",

language = "English",

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pages = "583--586",

journal = "IEEE Antennas and Wireless Propagation Letters",

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T1 - Radially Polarized Annular-Slot Leaky-Wave Antenna for Three-Dimensional Near-Field Microwave Focusing

AU - Blanco, Darwin

AU - Gómez-Tornero, Jose Luis

AU - Rajo-Iglesias, Eva

AU - Llombart Juan, Nuria

PY - 2014

Y1 - 2014

N2 - Microwave three-dimensional near-field focusing with radial polarization using a holographic annular-slot antenna is demonstrated in this letter. This radial polarization can generate axially polarized focused fields in the near-field regime, which complements the more conventional synthesis of transversally polarized near-field focusing patterns. Moreover, it is shown that more symmetrical focal region is obtained thanks to the radial polarization for similar Fresnel number N and operation frequency. The theory is demonstrated with experiments for a design operating at 10 GHz, with aperture diameter D=6λ and a Fresnel number N=4.

AB - Microwave three-dimensional near-field focusing with radial polarization using a holographic annular-slot antenna is demonstrated in this letter. This radial polarization can generate axially polarized focused fields in the near-field regime, which complements the more conventional synthesis of transversally polarized near-field focusing patterns. Moreover, it is shown that more symmetrical focal region is obtained thanks to the radial polarization for similar Fresnel number N and operation frequency. The theory is demonstrated with experiments for a design operating at 10 GHz, with aperture diameter D=6λ and a Fresnel number N=4.

KW - Focal depth

KW - leaky-wave antennas

KW - three-dimensional near-field focused microwave antennas

UR - http://www.scopus.com/inward/record.url?scp=84898682311&partnerID=8YFLogxK

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SP - 583

EP - 586

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

M1 - 6767070

ER -

Radially Polarized Annular-Slot Leaky-Wave Antenna for Three-Dimensional Near-Field Microwave Focusing

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Keywords

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