Zobrazeno 1 - 10
of 16
pro vyhledávání: '"N. J. McEwan"'
Autor:
Y. A. S. Dama, R. A. Abd-Alhameed, S. M. R. Jones, D. Zhou, N. J. McEwan, M. B. Child, P. S. Excell
Publikováno v:
International Journal of Antennas and Propagation, Vol 2011 (2011)
The scattering parameter formulation for the envelope correlation in an (N,N) MIMO antenna array has been modified to take the intrinsic antenna power losses into account. This method of calculation provides a major simplification over the use of ant
Externí odkaz:
https://doaj.org/article/a88c3d41e740424eaa1d562e5c28523e
Publikováno v:
Antenna Fundamentals for Legacy Mobile Applications and Beyond ISBN: 9783319639666
In most of the antenna designs for mobile handsets, unbalanced antennas like IFA (inverted F antenna) and PIFA (planar inverted F antenna) type designs have been widely used. Such types of designs usually offer wide impedance bandwidth and compact de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20d58bcf91408dbb5ec2da65fbdc3f61
https://doi.org/10.1007/978-3-319-63967-3_11
https://doi.org/10.1007/978-3-319-63967-3_11
Autor:
Roger W. Clarke, Chan H. See, Issa Elfergani, S. Zhu, Jonathan Rodriguez, Raed A. Abd-Alhameed, Abubakar Sadiq Hussaini, N. J. McEwan
Publikováno v:
International Journal of RF and Microwave Computer-Aided Engineering. 25:403-412
A tunable band-notch printed monopole antenna is presented, exhibiting a wide impedance bandwidth from 1.5 to 5.5 GHz with good impedance matching VSWRi¾?2 and a tunable rejected frequency band from 2.38 to 3.87 GHz. The band-notching is achieved by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59d047bb0b05fd59cc9a004fce356056
https://doi.org/10.1002/mmce.20874
https://doi.org/10.1002/mmce.20874
Publikováno v:
International Journal of Electronics. 89:657-663
A new printed dual-spiral slot antenna, fully integrated with coplanar waveguide (CPW), is described. The two spiral elements are simultaneously coupled to a single feed line and produce a circular polarization. It can be operated with bi- or unidire
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da1394e1782e254ee5b1097c2122d8a4
https://doi.org/10.1080/0020721021000046500
https://doi.org/10.1080/0020721021000046500
Publikováno v:
International Journal of Infrared and Millimeter Waves. 16:1789-1810
This paper presents a description of propagation and losses for coplanar waveguide (CPW) structures using quasi - static analysis, based on the approximate conformal technique. The behaviour of attenuation losses in CPWs is studied for quasi planar t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4430fd21811cb993240fea094ff6ea8d
https://doi.org/10.1007/bf02068690
https://doi.org/10.1007/bf02068690
Publikováno v:
International Journal of Infrared and Millimeter Waves. 16:1393-1406
Approximate conformal mapping techniques have been used for analysing the effect of finite substrate thickness on coplanar wave guide (CPW). Calculations for impedance and effective dielectric constant are presented for CPW's with finite substrate th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0f7c5bea6e847cfb4267845d0ccf4c9
https://doi.org/10.1007/bf02069551
https://doi.org/10.1007/bf02069551
Publikováno v:
Experimental Astronomy. 4:21-40
This paper considers the possibility of using pulsed and continuous wave radio sources to scatter or reflect a signal from the ionisation produced by an Extensive Air Shower (EAS) to provide a precise indication of the source co-ordinates of the prim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff3d1f307e152fb9951920c745168b11
https://doi.org/10.1007/bf01581812
https://doi.org/10.1007/bf01581812
Publikováno v:
24th European Microwave Conference, 1994.
It is shown that, by approximating a human head as a dielectric sphere, the method of spherical wave expansions can be used to obtain useful predictions of interactions between the head and an adjacent handset antenna working at about 2 GHz. The fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a5a9cb6ce2ae52fb3a69dfceabd5113
https://doi.org/10.1109/euma.1994.337276
https://doi.org/10.1109/euma.1994.337276
Publikováno v:
Second International Conference on Computation in Electromagnetics.
The paper uses a simple spherical model for the head and makes a number of promising comparisons of predicted and observed azimuth patterns of a handset operating close to the head. Also included is an experimental verification of the program using a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68e780bf2190a58413fa42920320dd48
https://doi.org/10.1049/cp:19940025
https://doi.org/10.1049/cp:19940025