Zobrazeno 1 - 10
of 47
pro vyhledávání: '"M. C. K. Wiltshire"'
Publikováno v:
IEEE Journal of Radio Frequency Identification. 5:148-153
Efforts to increase read range in passive HF RFID systems are hampered by the poor range scaling law of inductive coupling. An alternative approach to enlarging capture volume—increasing the lateral extent of the antenna—is proposed, using a magn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0491403b8bff0c216a5ff454a673f8a
https://doi.org/10.1109/jrfid.2020.3042719
https://doi.org/10.1109/jrfid.2020.3042719
Autor:
M. C. K. Wiltshire, Richard R. A. Syms
Electromagnetic metamaterials are artificially constructed media composed of arrays of electrical circuits that can exhibit electric and magnetic characteristics unlike those of any conventional materials. However, the materials are lossy and hence n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe891ba721d097fc9d24892469aad378
http://hdl.handle.net/10044/1/60336
http://hdl.handle.net/10044/1/60336
Autor:
M. C. K. Wiltshire
Publikováno v:
Theory and Phenomena of Metamaterials ISBN: 9781315219370
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c93b9e31a1f07b498855b0f0768e239
https://doi.org/10.1201/9781420054262-14
https://doi.org/10.1201/9781420054262-14
Autor:
M. C. K. Wiltshire, John B. Pendry, David J. Edwards, Joseph V. Hajnal, Christopher J. Stevens
Publikováno v:
Scopus-Elsevier
We report on the development and use of a highly anisotropic magnetic metamaterial for near-field imaging. The material consists of an array of Swiss Roll structures, resonant near 21.3 MHz, with a peak value of relative permeability ~35. At this pea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::546dd046737ba3b8591d13cc9f3efaec
https://ora.ox.ac.uk/objects/uuid:2c6d9e28-f927-4e58-8a5b-7840fd96f1e2
https://ora.ox.ac.uk/objects/uuid:2c6d9e28-f927-4e58-8a5b-7840fd96f1e2
Autor:
M. C. K. Wiltshire
Publikováno v:
physica status solidi (b). 244:1227-1236
By studying metamaterials at low frequency, where wavelengths are much larger than the unit cell, the requirements of homogenization and the effective medium approximation can be easily met. The Swiss Roll medium is well-suited to the RF frequency ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8011f13e852c1d4d80769df4cb4a6e3e
https://doi.org/10.1002/pssb.200674511
https://doi.org/10.1002/pssb.200674511
Publikováno v:
Journal of Physics: Condensed Matter. 18:L315-L321
A slab of material with a negative permeability can act as a super-lens for magnetic fields and generate images with a sub-wavelength resolution. We have constructed an effective medium using a metamaterial with negative permeability in the region of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00faaa8249525aba7fae5e24c8603510
https://doi.org/10.1088/0953-8984/18/22/l06
https://doi.org/10.1088/0953-8984/18/22/l06
Publikováno v:
Science. 305:788-792
Recently, artificially constructed metamaterials have become of considerable interest, because these materials can exhibit electromagnetic characteristics unlike those of any conventional materials. Artificial magnetism and negative refractive index
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05d4f16ce03996f6d55b4504c7a4db3f
https://doi.org/10.1126/science.1096796
https://doi.org/10.1126/science.1096796
Publikováno v:
Journal of Applied Physics. 95:4488-4493
The propagation of magneto-inductive waves in a one-dimensional array of “swiss roll” metamaterial has been studied. It was found that long-range interactions over the whole of the array must be included to describe the excitations accurately. Us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f42a0e2f8b612216e738ad6d3c40080
https://doi.org/10.1063/1.1687036
https://doi.org/10.1063/1.1687036
Publikováno v:
Journal of Modern Optics. 50:1419-1430
In an earlier paper we introduced the concept of the perfect lens which focuses both near and far electromagnetic fields, hence attaining perfect resolution. Here we consider refinements of the original prescription designed to overcome the limitatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::567f948e878f10001a4bb918a1d28ae6
https://doi.org/10.1080/09500340308235215
https://doi.org/10.1080/09500340308235215
Autor:
M. C. K. Wiltshire, Richard R. A. Syms
Magneto-inductive (MI) waveguides are metamaterial structures based on periodic arrangements of inductively coupled resonant magnetic elements. They are of interest for power transfer, communications and sensing, and can be realised in a flexible cab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a0d017cf6f6c310adf123a6e5ce0d55
http://hdl.handle.net/10044/1/31318
http://hdl.handle.net/10044/1/31318