Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Yiannis Vardaxoglou"'
Autor:
Florindo Bevilacqua, Amedeo Capozzoli, Claudio Curcio, Francesco D’Agostino, Flaminio Ferrara, Claudio Gennarelli, Rocco Guerriero, Angelo Liseno, Massimo Migliozzi, Yiannis Vardaxoglou
Publikováno v:
IET Microwaves, Antennas & Propagation, Vol 17, Iss 8, Pp 651-666 (2023)
Abstract An effective, probe‐compensated, phaseless Near‐Field‐Far‐Field (NF–FF) transformation technique with planar spiral scanning is presented. The phase retrieval problem is solved by a quadratic inverse process, whose data are the vol
Externí odkaz:
https://doaj.org/article/bc9c7975cd394bc2a497f121d87b666c
Autor:
Dawei Wang, Shiyu Zhang, Di Zhou, Kaixin Song, Antonio Feteira, Yiannis Vardaxoglou, Will Whittow, Darren Cadman, Ian M. Reaney
Publikováno v:
Materials, Vol 12, Iss 9, p 1370 (2019)
Dense (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 (100−x) wt.% (Bi0.95Li0.05)(V0.9Mo0.1)O4 (BLVMO)-x wt.% Na2Mo2O7 (NMO) composite ceramics were successfully fabricated through cold sintering at 150 °C under at 200 MPa for 30 min. X-ray diffraction, back
Externí odkaz:
https://doaj.org/article/6d4eff1873c748c08dd69baa39d24b57
Autor:
Chih-Kuo Lee, Jack McGhee, Christos Tsipogiannis, Shiyu Zhang, Darren Cadman, Athanasios Goulas, Tom Whittaker, Reza Gheisari, Daniel Engstrom, John (Yiannis) Vardaxoglou, William Whittow
Publikováno v:
Designs, Vol 3, Iss 4, p 47 (2019)
Additive manufacturing (AM) has become more important and common in recent years. Advantages of AM include the ability to rapidly design and fabricate samples much faster than traditional manufacturing processes and to create complex internal geometr
Externí odkaz:
https://doaj.org/article/52cffc1ce8e444b48630a26b3814102b
Publikováno v:
Applied Sciences, Vol 9, Iss 13, p 2727 (2019)
This paper is a critical review of metasurfaces, which are planar metamaterials. Metamaterials offer bespoke electromagnetic applications and novel properties which are not found in naturally occurring materials. However, owing to their 3D-nature and
Externí odkaz:
https://doaj.org/article/99e7d0f99fe7429b959d89e4605fd476
Autor:
Yiannis Vardaxoglou, Karu P. Esselle, Foez Ahmed, Shiyu Zhang, Muhammad U. Afzal, Touseef Hayat
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 19:1271-1275
© 2002-2011 IEEE. A 3-D printed planar permittivity-gradient superstrate (PGS) is used to improve the directive radiation characteristics of a waveguide-fed compact resonant cavity antenna (CRCA). Far-field directivity of classical uniform superstra
Autor:
Ian M. Reaney, Julian S. Dean, Derek C. Sinclair, Dawei Wang, Ali Mostaed, Sinan S. Faouri, Shiyu Zhang, Yiannis Vardaxoglou, William Whittow
Publikováno v:
Acta Materialia. 166:202-207
Ceramics-ceramic composites in series (1-x)Li2MoO4-xBaFe12O19 (LMO-BF12, 0.00 ≤ x ≤ 0.15) have been cold sintered at 120 °C and their structure and properties characterized. X-ray diffraction, scanning electron microscopy (SEM) and transmission
Autor:
Jack R. McGhee, John Yiannis Vardaxoglou, Jacob Moriarty, Jamie Northedge, William Whittow, Shiyu Zhang, Tom Whittaker, Darren Cadman
Publikováno v:
2020 14th European Conference on Antennas and Propagation (EuCAP).
In this research, stereolithography (SLA) based additive manufacturing (AM) has been investigated as a fabrication method for producing artificial dielectrics. Initially, the effect of the curing time on the microwave electromagnetic properties (X-ba
Autor:
Ian M. Reaney, Darren Cadman, Antonio Feteira, Di Zhou, Yiannis Vardaxoglou, Shiyu Zhang, Dawei Wang, William Whittow, Kaixin Song
Publikováno v:
Materials
Volume 12
Issue 9
Materials, Vol 12, Iss 9, p 1370 (2019)
Volume 12
Issue 9
Materials, Vol 12, Iss 9, p 1370 (2019)
Dense (Bi0.95Li0.05)(V0.9Mo0.1)O4-Na2Mo2O7 (100&minus
x) wt.% (Bi0.95Li0.05)(V0.9Mo0.1)O4 (BLVMO)-x wt.% Na2Mo2O7 (NMO) composite ceramics were successfully fabricated through cold sintering at 150 °
C under at 200 MPa for 30 min. X-ray
x) wt.% (Bi0.95Li0.05)(V0.9Mo0.1)O4 (BLVMO)-x wt.% Na2Mo2O7 (NMO) composite ceramics were successfully fabricated through cold sintering at 150 °
C under at 200 MPa for 30 min. X-ray
Autor:
Ravi Kumar Arya, Ashwani Kumar, Yiannis Vardaxoglou, Shaileshachandra Pandey, Raj Mittra, Shiyu Zhang, William Whittow
Publikováno v:
Developments in Antenna Analysis and Design: Volume 1 ISBN: 9781785618888
In this article chapter, we discuss different ways to mitigate some of the problems encountered with MTMs, and present strategies for artificially synthesizing dielectric materials that are broadband as well as low-loss; hence, they are useful for re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c501e97e2f782882279b95487ee3173
https://doi.org/10.1049/sbew543f_ch10
https://doi.org/10.1049/sbew543f_ch10
Autor:
Raj Mittra, Ravi Kumar Arya, Yiannis Vardaxoglou, Shiyu Zhang, William Whittow, Shaileshchandra Pandey
Publikováno v:
IET Microwaves, Antennas & Propagation. 10:1411-1419
The authors introduce two flat graded-index (GRIN) lens designs in this study. First of these is a thick lens, which was designed and fabricated by using the three-dimensional (3D)-printing technique. Second, a thin dial-a-dielectric (DaD) lens, whic