Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Anu Lehtovuori"'
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 3, Pp 653-663 (2024)
This paper introduces a method for computing reactive terminations for scatterer elements in antenna arrays. With the fixed scatterer elements, we shape embedded element patterns of sparse arrays to focus the radiation into a grating-lobe-free limite
Externí odkaz:
https://doaj.org/article/bdca7d467aef4ee3a7492d02d6ffc040
Publikováno v:
IEEE Access, Vol 11, Pp 111888-111896 (2023)
A wideband 8-element multiple-input multiple-output (MIMO) antenna for fifth-generation (5G) smartphones with a full-screen and a metal rim is presented. A single antenna element consists of two slots, open and closed, both placed solely on the metal
Externí odkaz:
https://doaj.org/article/52dbc14a856245af9e4329c186fa789a
Publikováno v:
IEEE Access, Vol 11, Pp 95225-95234 (2023)
The effect of load-pull on 3rd order intermodulation (IM3) radiation characteristics of a transmitting active phased array is studied and a general model for predicting the spatial distribution of fundamental tones and intermodulation products is int
Externí odkaz:
https://doaj.org/article/693a8ced694b406b95c728670a9d809c
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 815-823 (2023)
We propose a flexible cluster array concept utilizing diverse antenna elements and the mutual coupling among them to improve the spherical coverage. This innovative approach can not only enhance the impedance matching but also improve the beamforming
Externí odkaz:
https://doaj.org/article/55a3b3a11964431cb78078a94b811b80
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 1, Pp 52-59 (2023)
We analyze the performance of an amplifier-antenna array by using separately measured amplifier load-pull data and antenna S-parameters and port-specific radiation patterns. We show that the effective isotropic radiated power (EIRP) of the system can
Externí odkaz:
https://doaj.org/article/75408193362e4554b01fa0bc3adb2090
Publikováno v:
IEEE Access, Vol 10, Pp 31190-31200 (2022)
In this paper, we develop a novel method to design the elements of an antenna array and their feed weights simultaneously. The method is based on formulating the design problem as a non-linear multi-objective optimization model that estimates the rea
Externí odkaz:
https://doaj.org/article/0f8578ba33fb4cf3ab9a34e6d7a6ff51
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 1154-1160 (2022)
A novel antenna design with a low specific absorption rate (SAR) is introduced. The antenna has a very low profile and it is designed to be placed on the back cover of a mobile device at around 2 GHz. The solution is based on nested loops which distr
Externí odkaz:
https://doaj.org/article/18408e1b68d54a968844e03361985bb1
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 2, Pp 431-438 (2021)
In this paper, we present a novel method to tailor the radiation pattern of an antenna element, such as a single element of an array, by maximizing its partial radiation efficiency in the desired angular space. The tailored pattern of the single elem
Externí odkaz:
https://doaj.org/article/5ccdc1824c32433084fbe6d416f2ef45
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:
International Journal of Antennas and Propagation, Vol 2019 (2019)
This paper presents the first realization of a lumped-element decoupling and matching network (DMN) for more than two-element mobile MIMO arrays. The realization of the DMN is based on an existing method, which is improved in terms of bandwidth and t
Externí odkaz:
https://doaj.org/article/74b90f17f4044449b4c031700c2a9799