Near-field focusing with a corrugated surface

Mohammadreza F. Imani; Anthony Grbic

doi:10.1109/LAWP.2009.2021495

Near-field focusing with a corrugated surface

Mohammadreza F. Imani, Anthony Grbic

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

26 Scopus citations

Abstract

In this letter, we present a theoretical device that can produce electromagnetic near-field patterns with deep subwave-length resolution. The device consists of a single slit in a corrugated metallic surface. The surface exhibits a nonperiodic series of grooves symmetrically positioned about a waveguide-fed slit. A procedure for designing such a device is described in detail. The electromagnetic response of the corrugated surface is shown to be as theoretically predicted, producing a subwavelength focal pattern with a null-to-null beamwidth of λ/10. In addition, the effect of losses on the performance of the device is studied. Finally, it is shown that the device can be impedance-matched to its waveguide feed. Such devices will find use in noncontact sensing and near-field probing applications.

Original language	English (US)
Article number	4838952
Pages (from-to)	421-424
Number of pages	4
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	8
DOIs	https://doi.org/10.1109/LAWP.2009.2021495
State	Published - 2009
Externally published	Yes

Keywords

Corrugated surface
Diffraction limit
Focusing
Metamaterials
Near field

ASJC Scopus subject areas

Electrical and Electronic Engineering

Access to Document

10.1109/LAWP.2009.2021495

Cite this

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title = "Near-field focusing with a corrugated surface",

abstract = "In this letter, we present a theoretical device that can produce electromagnetic near-field patterns with deep subwave-length resolution. The device consists of a single slit in a corrugated metallic surface. The surface exhibits a nonperiodic series of grooves symmetrically positioned about a waveguide-fed slit. A procedure for designing such a device is described in detail. The electromagnetic response of the corrugated surface is shown to be as theoretically predicted, producing a subwavelength focal pattern with a null-to-null beamwidth of λ/10. In addition, the effect of losses on the performance of the device is studied. Finally, it is shown that the device can be impedance-matched to its waveguide feed. Such devices will find use in noncontact sensing and near-field probing applications.",

keywords = "Corrugated surface, Diffraction limit, Focusing, Metamaterials, Near field",

author = "Imani, {Mohammadreza F.} and Anthony Grbic",

note = "Funding Information: Manuscript received January 23, 2009; revised April 02, 2009. First published April 21, 2009; current version published June 03, 2009. This work was supported by an Air Force Office of Scientific Research (AFOSR) Young Investigator Research Program Award (FA9550-08-1-0067), a NSF Faculty Early Career Development Award (ECCS-0747623), and the Multidisciplinary University Research Initiative Program (FA9550-06-01-0279).",

year = "2009",

doi = "10.1109/LAWP.2009.2021495",

language = "English (US)",

volume = "8",

pages = "421--424",

journal = "IEEE Antennas and Wireless Propagation Letters",

issn = "1536-1225",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Near-field focusing with a corrugated surface

AU - Imani, Mohammadreza F.

AU - Grbic, Anthony

N1 - Funding Information: Manuscript received January 23, 2009; revised April 02, 2009. First published April 21, 2009; current version published June 03, 2009. This work was supported by an Air Force Office of Scientific Research (AFOSR) Young Investigator Research Program Award (FA9550-08-1-0067), a NSF Faculty Early Career Development Award (ECCS-0747623), and the Multidisciplinary University Research Initiative Program (FA9550-06-01-0279).

PY - 2009

Y1 - 2009

N2 - In this letter, we present a theoretical device that can produce electromagnetic near-field patterns with deep subwave-length resolution. The device consists of a single slit in a corrugated metallic surface. The surface exhibits a nonperiodic series of grooves symmetrically positioned about a waveguide-fed slit. A procedure for designing such a device is described in detail. The electromagnetic response of the corrugated surface is shown to be as theoretically predicted, producing a subwavelength focal pattern with a null-to-null beamwidth of λ/10. In addition, the effect of losses on the performance of the device is studied. Finally, it is shown that the device can be impedance-matched to its waveguide feed. Such devices will find use in noncontact sensing and near-field probing applications.

AB - In this letter, we present a theoretical device that can produce electromagnetic near-field patterns with deep subwave-length resolution. The device consists of a single slit in a corrugated metallic surface. The surface exhibits a nonperiodic series of grooves symmetrically positioned about a waveguide-fed slit. A procedure for designing such a device is described in detail. The electromagnetic response of the corrugated surface is shown to be as theoretically predicted, producing a subwavelength focal pattern with a null-to-null beamwidth of λ/10. In addition, the effect of losses on the performance of the device is studied. Finally, it is shown that the device can be impedance-matched to its waveguide feed. Such devices will find use in noncontact sensing and near-field probing applications.

KW - Corrugated surface

KW - Diffraction limit

KW - Focusing

KW - Metamaterials

KW - Near field

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JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

M1 - 4838952

ER -

Near-field focusing with a corrugated surface

Abstract

Keywords

ASJC Scopus subject areas

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