Zobrazeno 1 - 10
of 1 228
pro vyhledávání: '"Frequency-reconfigurable"'
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 5, Iss 6, Pp 1773-1785 (2024)
This article presents a mechanically frequency-reconfigurable monopole antenna and array that offers a wide tuning range, gain enhancement, and stable beamwidth. The monopole is positioned above a large reflector plate to achieve unidirectional radia
Externí odkaz:
https://doaj.org/article/c813e76c38104b91a6f22b0fdc21daa5
Publikováno v:
IEEE Access, Vol 12, Pp 164803-164810 (2024)
A new actuation technique is introduced for overcoming the complexity and radiation performance degradation issues of actuators-based reconfigurable antennas. We employ shape memory alloy (SMAlloy) spring actuators to control the positioning of the f
Externí odkaz:
https://doaj.org/article/6e5375485ebb436c8a60c310d65aa195
Publikováno v:
IEEE Access, Vol 12, Pp 127805-127824 (2024)
This paper presents a compact and portable frequency reconfigurable Substrate Integrated Waveguide (SIW) antenna for frequency jamming applications. Conventional jamming systems use multiple antennas, each dedicated to blocking a single frequency ban
Externí odkaz:
https://doaj.org/article/d7b3f41f5c454e7dbf08e4d28ae1cac5
Publikováno v:
IEEE Access, Vol 12, Pp 118270-118285 (2024)
A frequency reconfigurable antenna with a cavity-backed annular that can switch multiple bands is proposed. The compact size of the antenna allows its structure to be integrated into the housing of a smartwatch. This model is a circular watch with a
Externí odkaz:
https://doaj.org/article/dbd801d3dcda4db2ac5ffe1571b1eae9
Autor:
Widad Faraj A. Mshwat, Jamal Sulieman Kosha, Abubakar Salisu, Atta Ullah, Nazar T. Ali, Issa Elfergani, Chan Hwang See, Chemseddine Zebiri, Jonathan Rodriguez, Raed Abd-Alhameed
Publikováno v:
IEEE Access, Vol 12, Pp 110283-110298 (2024)
Four miniaturized four-element multiple-input multiple-output (MIMO) antenna designs are proposed, designed, and fabricated with dimensions of 26 mm x 26 mm x 0.8 mm each. The first MIMO design operates at 3.5 GHz, while the second operates at 5.2 GH
Externí odkaz:
https://doaj.org/article/918ce4c184554593bedb071d713b5be2
Publikováno v:
International Journal of Electronics and Telecommunications, Vol vol. 69, Iss No 3, Pp 439-448 (2023)
This paper demonstrates a low-profile, wide-band, two-element, frequency-reconfigurable MIMO antenna that is suitable for diverse wireless applications of 4G and 5G such as WLAN/Bluetooth (2.4–2.5 GHz), WLAN (2.4–2.484 GHz, 5.15– 5.35 GHz, and
Externí odkaz:
https://doaj.org/article/b0fc168475624947a798c4251643c0a1
Publikováno v:
Sustainable Energy Research, Vol 10, Iss 1, Pp 1-9 (2023)
Abstract Solar power on Earth is characterized by its intermittent nature, limiting its practical application to peak loads only. However, this limitation can be overcome by implementing a concept known as Satellite Solar Power Station (SSPS), which
Externí odkaz:
https://doaj.org/article/49e60974535145c98804190d214394e9
Autor:
Hoang Thi Phuong Thao
Publikováno v:
Tạp chí Khoa học và Công nghệ, Pp 7-13 (2023)
Reconfigurable antennas are a type of smart antenna that is able to change whose properties, including resonant frequency, polarization, radiation pattern, and a combination of these properties. Reconfigurable antennas can switch between their config
Externí odkaz:
https://doaj.org/article/41beccc457f64206880f86cc0c8b8f8f
Publikováno v:
Micromachines, Vol 15, Iss 5, p 638 (2024)
In this article, an ultra-wideband (UWB) antenna featuring two reconfigurable quasi-perfect stop bands at WLAN (5.25–5.75 GHz) and lower 5G (3.4–3.8 GHz) utilizing electromagnetic bandgaps (EBGs) and positive-intrinsic-negative (P-I-N) diodes is
Externí odkaz:
https://doaj.org/article/d2a2c917d7bd43dc95d57b0669805fdc
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 1087-1094 (2023)
Tuning range extension strategies for varactor-based frequency-reconfigurable planar patch antennas are presented. The three tuning range optimization methods described in the paper include co-optimization of antenna dimensions and varactor propertie
Externí odkaz:
https://doaj.org/article/2eb67b2d4789405c96e902eefd574c87