Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications

Carolina Mateo-Segura; Amy Dyke; Hazel Dyke; Sajad Haq; Yang Hao

doi:10.1109/TAP.2014.2302004

Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications

Carolina Mateo-Segura, Amy Dyke, Hazel Dyke, Sajad Haq, Yang Hao

School of Engineering & Physical Sciences

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

217 Citations (Scopus)

804 Downloads (Pure)

Abstract

The great flexibility offered by transformation optics for controlling electromagnetic radiation by virtually re-shaping the electromagnetic space has inspired a myriad of dream-tailored electromagnetic devices. Here we show a 3D-transformed microwave Luneburg lens antenna which demonstrates high directivity, low side-lobe level, broadband response and steerable capabilities. A conventional Luneburg lens is redesigned accounting for dielectric materials that implement a coordinate transformation, modifying the lens geometry to accommodate its size and shape for potential high power applications. An all dielectric flat lens is manufactured following a thorough holistic analysis of ceramic materials with different volume fractions of bi-modal distributed titanate fillers. Fabrication and measurements of a 3-D flat Luneburg lens antenna validate the design and confirm a high-directivity performance. A maximum directivity of 18.03dBi, low side-lobe levels for both main planes ~ -15dB, bandwidth limited only by the source employed and beam-steering up to 35° were achieved.

Original language	English
Pages (from-to)	1945-1953
Journal	IEEE Transactions on Antennas and Propagation
Volume	62
Issue number	4
Early online date	22 Jan 2014
DOIs	https://doi.org/10.1109/TAP.2014.2302004
Publication status	Published - Apr 2014

Access to Document

10.1109/TAP.2014.2302004

Download pdf
(c) 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Accepted author manuscript, 3.49 MB

Cite this

@article{057964c125b7449ea7744a5f77f8c4f0,

title = "Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications",

abstract = "The great flexibility offered by transformation optics for controlling electromagnetic radiation by virtually re-shaping the electromagnetic space has inspired a myriad of dream-tailored electromagnetic devices. Here we show a 3D-transformed microwave Luneburg lens antenna which demonstrates high directivity, low side-lobe level, broadband response and steerable capabilities. A conventional Luneburg lens is redesigned accounting for dielectric materials that implement a coordinate transformation, modifying the lens geometry to accommodate its size and shape for potential high power applications. An all dielectric flat lens is manufactured following a thorough holistic analysis of ceramic materials with different volume fractions of bi-modal distributed titanate fillers. Fabrication and measurements of a 3-D flat Luneburg lens antenna validate the design and confirm a high-directivity performance. A maximum directivity of 18.03dBi, low side-lobe levels for both main planes \textasciitilde{} -15dB, bandwidth limited only by the source employed and beam-steering up to 35° were achieved.",

author = "Carolina Mateo-Segura and Amy Dyke and Hazel Dyke and Sajad Haq and Yang Hao",

year = "2014",

month = apr,

doi = "10.1109/TAP.2014.2302004",

language = "English",

volume = "62",

pages = "1945--1953",

journal = "IEEE Transactions on Antennas and Propagation",

issn = "0018-926X",

publisher = "IEEE",

number = "4",

}

TY - JOUR

T1 - Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications

AU - Mateo-Segura, Carolina

AU - Dyke, Amy

AU - Dyke, Hazel

AU - Haq, Sajad

AU - Hao, Yang

PY - 2014/4

Y1 - 2014/4

N2 - The great flexibility offered by transformation optics for controlling electromagnetic radiation by virtually re-shaping the electromagnetic space has inspired a myriad of dream-tailored electromagnetic devices. Here we show a 3D-transformed microwave Luneburg lens antenna which demonstrates high directivity, low side-lobe level, broadband response and steerable capabilities. A conventional Luneburg lens is redesigned accounting for dielectric materials that implement a coordinate transformation, modifying the lens geometry to accommodate its size and shape for potential high power applications. An all dielectric flat lens is manufactured following a thorough holistic analysis of ceramic materials with different volume fractions of bi-modal distributed titanate fillers. Fabrication and measurements of a 3-D flat Luneburg lens antenna validate the design and confirm a high-directivity performance. A maximum directivity of 18.03dBi, low side-lobe levels for both main planes ~ -15dB, bandwidth limited only by the source employed and beam-steering up to 35° were achieved.

AB - The great flexibility offered by transformation optics for controlling electromagnetic radiation by virtually re-shaping the electromagnetic space has inspired a myriad of dream-tailored electromagnetic devices. Here we show a 3D-transformed microwave Luneburg lens antenna which demonstrates high directivity, low side-lobe level, broadband response and steerable capabilities. A conventional Luneburg lens is redesigned accounting for dielectric materials that implement a coordinate transformation, modifying the lens geometry to accommodate its size and shape for potential high power applications. An all dielectric flat lens is manufactured following a thorough holistic analysis of ceramic materials with different volume fractions of bi-modal distributed titanate fillers. Fabrication and measurements of a 3-D flat Luneburg lens antenna validate the design and confirm a high-directivity performance. A maximum directivity of 18.03dBi, low side-lobe levels for both main planes ~ -15dB, bandwidth limited only by the source employed and beam-steering up to 35° were achieved.

U2 - 10.1109/TAP.2014.2302004

DO - 10.1109/TAP.2014.2302004

M3 - Article

SN - 0018-926X

VL - 62

SP - 1945

EP - 1953

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

IS - 4

ER -

Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications

Abstract

Access to Document

Fingerprint

Cite this