Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Vahid Nayyeri"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024)
Abstract A de-embedding method for determining all scattering (S-) parameters (e.g., characterization) of a sensing area of planar microstrip sensors (two-port network or line) is proposed using measurements of S-parameters with no calibration. The m
Externí odkaz:
https://doaj.org/article/77bf05884d20426cb622b7884cb8b54b
Autor:
Ugur C. Hasar, Hafize Hasar, Hamdullah Ozturk, Huseyin Korkmaz, Yunus Kaya, Mehmet Akif Ozkaya, Amir Ebrahimi, Joaquim J. Barroso, Vahid Nayyeri, Omar M. Ramahi
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-12 (2024)
Abstract A simple and inexpensive microwave measurement setup based on measurements of magnitudes of transmission properties ( $$|S_{21}|_{\text {dB}}$$ | S 21 | dB ) is proposed for industrial-based microwave aquametry (moisture or water content) ap
Externí odkaz:
https://doaj.org/article/9e3047a93d1748259c3cd869506594ed
Publikováno v:
IEEE Access, Vol 12, Pp 106313-106320 (2024)
This article introduces an ultrawideband antenna with stable phase center and circular polarization. The proposed antenna is a low-profile cavity-backed spiral antenna measuring $58\times 58\times 50$ mm3, where the cavity is partially filled with an
Externí odkaz:
https://doaj.org/article/c6e1e4cf4108409a8316ff495c105494
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-13 (2023)
Abstract In this paper, we present an entirely simulation-based method to predict the performance of a complete rectenna system that includes all its components: the receiving antenna, the matching circuits between the antenna and the rectification c
Externí odkaz:
https://doaj.org/article/e687f3bcca3a4a54895e7654aa0d671c
Autor:
Sina Beyraghi, Fardin Ghorbani, Javad Shabanpour, Mir Emad Lajevardi, Vahid Nayyeri, Pai-Yen Chen, Omar M. Ramahi
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)
Abstract This paper studies the feasibility of a deep neural network (DNN) approach for bone fracture diagnosis based on the non-invasive propagation of radio frequency waves. In contrast to previous “semi-automated” techniques, where X-ray image
Externí odkaz:
https://doaj.org/article/35ce103be7b5476e9501aadd26269462
Autor:
Hamid Akbari-Chelaresi, Dawood Alsaedi, Seyed Hossein Mirjahanmardi, Mohamed El Badawe, Ali M. Albishi, Vahid Nayyeri, Omar M. Ramahi
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-13 (2023)
Abstract In this paper, a novel technique for detecting female breast anomalous tissues is presented and validated through numerical simulations. The technique, to a high degree, resembles X-ray mammography; however, instead of using X-rays for obtai
Externí odkaz:
https://doaj.org/article/35bd8b37bd694e2cbb5d03061ffef6c9
Publikováno v:
IEEE Access, Vol 11, Pp 135159-135165 (2023)
This paper proposes a thin multiband reflective polarization converter surface capable of transforming a linearly polarized (LP) incident electromagnetic (EM) wave into its orthogonal LP reflection wave in frequency bands of 8.14-8.25 GHz, 10.23-10.6
Externí odkaz:
https://doaj.org/article/45482c38e2ea4cbbad7c71f525a55751
Publikováno v:
IEEE Access, Vol 11, Pp 98532-98541 (2023)
This study presents a novel approach to decrease the radar cross-section (RCS) by integrating and expanding the phase cancellation and polarization conversion methods. In this proposed technique, only one unit cell, akin to the polarization conversio
Externí odkaz:
https://doaj.org/article/e35b1c2fd65c4472b878d3e2abc8ae79
Autor:
Mohammad Shahmoradi, Sayyed-Hossein Javid-Hosseini, Vahid Nayyeri, Rocco Giofre, Paolo Colantonio
Publikováno v:
IEEE Access, Vol 11, Pp 28771-28780 (2023)
This paper presents a novel and accurate procedure for designing a Doherty power amplifier (DPA) for wireless systems. The method is based on a systematic approach to designing the matching networks of both Main and Auxiliary devices, which employs a
Externí odkaz:
https://doaj.org/article/d9f483607e84401dac762555196752db
Publikováno v:
IEEE Access, Vol 10, Pp 46128-46135 (2022)
A planar implementation of N-way radial power combiners with isolated input ports is presented. While keeping the design simple, the presented combiner can be manufactured solely using printed circuit board technology, and as a result, has a low weig
Externí odkaz:
https://doaj.org/article/9e7e46ed20224d98ada190e17ed2009d