Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Jari-Matti Hannula"'
Publikováno v:
IEEE Access, Vol 7, Pp 48971-48981 (2019)
A new antenna design method together with a novel metal rim antenna is presented in this paper. The design method transforms an electromagnetic synthesis problem into a circuit problem, which can be solved in a straightforward manner. The new metal r
Externí odkaz:
https://doaj.org/article/01e13788799545239f5b072d5b0633c5
Publikováno v:
2021 XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS).
In this paper, we compare two different bandwidth bounds on array antennas with a ground plane. The first of these bounds is based on the fact that the antenna can be seen as a passive system, which implies that its response can be described in terms
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9e7bc03cc3c336bb214b1f34a646764
https://doi.org/10.23919/ursigass51995.2021.9560350
https://doi.org/10.23919/ursigass51995.2021.9560350
Autor:
Jussi Ryynanen, Kari Stadius, Ali Raza Saleem, Anu Lehtovuori, Ville Viikari, Jari-Matti Hannula, Marko Kosunen
Publikováno v:
MWSCAS
Publisher Copyright: © 2021 IEEE. Active reconfiguring of the frequency response of an antenna cluster was recently demonstrated involving an integrated transmitter and antenna cluster. The tuning method solely relies on scaling the antenna cluster
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::382c7578144e1229c57a637347425948
https://aaltodoc.aalto.fi/handle/123456789/111071
https://aaltodoc.aalto.fi/handle/123456789/111071
Publikováno v:
IET Microwaves, Antennas & Propagation. 13:959-965
Realising capacity demands of future wireless communications require improved spectral efficiency in the sub-6 GHz frequency bands. This study proposes a novel eight-element multiple-input-multiple-output (MIMO) antenna that can be tuned from 1.7 to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d446ec6b16169d2c48c3ae850a6f97c
https://doi.org/10.1049/iet-map.2018.5742
https://doi.org/10.1049/iet-map.2018.5742
Autor:
Anu Lehtovuori, Kari Stadius, Jussi Ryynanen, Marko Kosunen, Ali Raza Saleem, Ville Viikari, Jari-Matti Hannula
Publikováno v:
2021 IEEE MTT-S International Microwave Symposium (IMS).
The paper presents an integrated transmitter front-end and antenna cluster characterization with a modulated signal. A recently published T-MTT paper described an antenna tuning method and the related transmitter IC, and this paper now extends that o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59031b4a6f8221f814e863729af67cda
https://doi.org/10.1109/ims19712.2021.9574984
https://doi.org/10.1109/ims19712.2021.9574984
Autor:
V.-P. Kutinlahti, Tapio Saarinen, Ville Viikari, Rasmus Luomaniemi, Riku Kormilainen, Jari-Matti Hannula, Anu Lehtovuori
All electrical properties of an antenna are determined by its current distribution. It is possible to numerically solve a current distribution producing optimal performance in some sense. However, this ideal current distribution is nearly impossible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7de95a0245ee0cca6e6de2d2c3eb64a7
https://aaltodoc.aalto.fi/handle/123456789/102345
https://aaltodoc.aalto.fi/handle/123456789/102345
Publikováno v:
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting.
The Q-factor of an antenna has been used to evaluate the maximum achievable bandwidth in small antennas. This capability has been extended to resonant periodic structures as well, enabling the maximum achievable bandwidth of specific element shapes t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef347322d4ff4bf590f25eba6dbbb3dc
https://doi.org/10.1109/ieeeconf35879.2020.9330146
https://doi.org/10.1109/ieeeconf35879.2020.9330146
Publikováno v:
2020 14th European Conference on Antennas and Propagation (EuCAP).
The antenna cluster concept utilizes multiple, simultaneously-fed radiating elements collaboratively as one antenna. We have previously presented several methods to obtaining feeding weights to realize certain impedance. In this work, we compare the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::060ff2b51972cc1503d86a813e87cb5d
https://doi.org/10.23919/eucap48036.2020.9135955
https://doi.org/10.23919/eucap48036.2020.9135955
To meet the needs of continuously increasing wireless data consumption, new antenna design schemes are needed. Combinatory feeding is a recently introduced method that utilizes a configurable multiport excitation to create simple frequency configurab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf6f59dd89309c8b355e2f27925de9c8
https://aaltodoc.aalto.fi/handle/123456789/45336
https://aaltodoc.aalto.fi/handle/123456789/45336
Publikováno v:
IEEE Transactions on Antennas and Propagation. 65:4452-4460
The upcoming standards of wireless communications result in additional and more stringent requirements for antennas in mobile phones. In this paper, we present a frequency-reconfigurable antenna that could potentially be suited for future mobile devi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2631805f155477f14066054752942f7b
https://doi.org/10.1109/tap.2017.2725384
https://doi.org/10.1109/tap.2017.2725384