A broadband monopole antenna enabled by an ultrathin anisotropic metamaterial coating

Zhi Hao Jiang; Micah D. Gregory; Douglas H. Werner

doi:10.1109/LAWP.2011.2180503

A broadband monopole antenna enabled by an ultrathin anisotropic metamaterial coating

Zhi Hao Jiang
, Micah D. Gregory
, Douglas H. Werner

Electrical Engineering

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

53 Scopus citations

Abstract

A new type of compact flexible anisotropic metamaterial (MM) coating is proposed, which greatly enhances the impedance bandwidth of a quarter-wave monopole to over an octave. The MM coating has a high effective permittivity for the tensor component oriented along the direction of the monopole. By properly choosing the radius and tensor parameter of the MM coating, another resonance at a higher frequency can be efficiently excited without affecting the fundamental mode of the monopole. Additionally, the similar current distributions on the monopole at both resonances make stable radiation patterns possible over the entire band. To experimentally verify the concept, an S-band MM coated monopole was designed, fabricated, and characterized, exhibiting a 2.14:1 bandwidth (2.15-4.6 GHz) with a VSWR of less than 2:1. The demonstrated MM coating has a radius of only λ and extremely light weight, which renders it attractive for use in applications such as broadband arrays and portable wireless devices.

Original language	English (US)
Article number	6109305
Pages (from-to)	1543-1546
Number of pages	4
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	10
DOIs	https://doi.org/10.1109/LAWP.2011.2180503
State	Published - 2011

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1109/LAWP.2011.2180503

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title = "A broadband monopole antenna enabled by an ultrathin anisotropic metamaterial coating",

abstract = "A new type of compact flexible anisotropic metamaterial (MM) coating is proposed, which greatly enhances the impedance bandwidth of a quarter-wave monopole to over an octave. The MM coating has a high effective permittivity for the tensor component oriented along the direction of the monopole. By properly choosing the radius and tensor parameter of the MM coating, another resonance at a higher frequency can be efficiently excited without affecting the fundamental mode of the monopole. Additionally, the similar current distributions on the monopole at both resonances make stable radiation patterns possible over the entire band. To experimentally verify the concept, an S-band MM coated monopole was designed, fabricated, and characterized, exhibiting a 2.14:1 bandwidth (2.15-4.6 GHz) with a VSWR of less than 2:1. The demonstrated MM coating has a radius of only λ and extremely light weight, which renders it attractive for use in applications such as broadband arrays and portable wireless devices.",

author = "Jiang, \{Zhi Hao\} and Gregory, \{Micah D.\} and Werner, \{Douglas H.\}",

note = "Funding Information: Manuscript received October 20, 2011; revised November 28, 2011; accepted December 09, 2011. Date of publication December 20, 2011; date of current version January 30, 2012. This work was supported in part by the NSF MRSEC under Grant DMR-0213623.",

year = "2011",

doi = "10.1109/LAWP.2011.2180503",

language = "English (US)",

volume = "10",

pages = "1543--1546",

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issn = "1536-1225",

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

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AU - Jiang, Zhi Hao

AU - Gregory, Micah D.

AU - Werner, Douglas H.

N1 - Funding Information: Manuscript received October 20, 2011; revised November 28, 2011; accepted December 09, 2011. Date of publication December 20, 2011; date of current version January 30, 2012. This work was supported in part by the NSF MRSEC under Grant DMR-0213623.

PY - 2011

Y1 - 2011

N2 - A new type of compact flexible anisotropic metamaterial (MM) coating is proposed, which greatly enhances the impedance bandwidth of a quarter-wave monopole to over an octave. The MM coating has a high effective permittivity for the tensor component oriented along the direction of the monopole. By properly choosing the radius and tensor parameter of the MM coating, another resonance at a higher frequency can be efficiently excited without affecting the fundamental mode of the monopole. Additionally, the similar current distributions on the monopole at both resonances make stable radiation patterns possible over the entire band. To experimentally verify the concept, an S-band MM coated monopole was designed, fabricated, and characterized, exhibiting a 2.14:1 bandwidth (2.15-4.6 GHz) with a VSWR of less than 2:1. The demonstrated MM coating has a radius of only λ and extremely light weight, which renders it attractive for use in applications such as broadband arrays and portable wireless devices.

AB - A new type of compact flexible anisotropic metamaterial (MM) coating is proposed, which greatly enhances the impedance bandwidth of a quarter-wave monopole to over an octave. The MM coating has a high effective permittivity for the tensor component oriented along the direction of the monopole. By properly choosing the radius and tensor parameter of the MM coating, another resonance at a higher frequency can be efficiently excited without affecting the fundamental mode of the monopole. Additionally, the similar current distributions on the monopole at both resonances make stable radiation patterns possible over the entire band. To experimentally verify the concept, an S-band MM coated monopole was designed, fabricated, and characterized, exhibiting a 2.14:1 bandwidth (2.15-4.6 GHz) with a VSWR of less than 2:1. The demonstrated MM coating has a radius of only λ and extremely light weight, which renders it attractive for use in applications such as broadband arrays and portable wireless devices.

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A broadband monopole antenna enabled by an ultrathin anisotropic metamaterial coating

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All Science Journal Classification (ASJC) codes

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