Zobrazeno 1 - 10
of 832
pro vyhledávání: '"Near field imaging"'
Autor:
Johanna Braunig, Simon Heinrich, Birte Coppers, Christoph Kammel, Vanessa Wirth, Marc Stamminger, Sigrid Leyendecker, Anna-Maria Liphardt, Ingrid Ullmann, Martin Vossiek
Publikováno v:
IEEE Journal of Microwaves, Vol 4, Iss 4, Pp 639-652 (2024)
The radar-based analysis of human motion is actively being researched due to its contact- and markerless nature and ability to measure motion directly via the Doppler effect. Especially in medical and biomechanical fields, precise movement analysis i
Externí odkaz:
https://doaj.org/article/63ef9c471d0449b1837005bff89481b9
Autor:
Jihye Yang, Hanju Lee
Publikováno v:
IEEE Access, Vol 12, Pp 133045-133053 (2024)
In this paper, we propose a method for the simultaneous imaging of static and microwave magnetic field distributions using magneto-optical indicator microscopy. This method employs an optical indicator made of a bismuth-substituted yttrium iron garne
Externí odkaz:
https://doaj.org/article/91eb5d5996934e0eb7ea7674fdcc6efb
Publikováno v:
IEEE Access, Vol 12, Pp 47283-47295 (2024)
In this paper, an efficient method of sparse MIMO array design is proposed to enhance the millimeter-wave near-field imaging by utilizing the geometric properties of the virtual array with uniform coverage of two-dimensional aperture and the minimal
Externí odkaz:
https://doaj.org/article/a08d6c274cc940b58ddaf76f0b97c6c6
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 1244-1256 (2024)
Multiple-input-multiple-output (MIMO) synthetic aperture radar (SAR) (MIMO-SAR) has numerous potential applications in fields, such as medical diagnosis and security screening. In near-field MIMO-SAR imaging, the virtual array is typically defined as
Externí odkaz:
https://doaj.org/article/22e9fce5121740ef8f68fda44b82bc3b
Publikováno v:
Advanced Photonics Research, Vol 5, Iss 1, Pp n/a-n/a (2024)
Terahertz (THz) waves occupy the electromagnetic spectrum between microwave and infrared radiation, with frequencies typically ranging from 0.1 to 10 THz. Compared with other optic and electronic tools, this frequency range allows for unique sensing
Externí odkaz:
https://doaj.org/article/66e49aa440864ba5965be940e3b097fa
Publikováno v:
Photonics, Vol 11, Iss 3, p 272 (2024)
In this paper, we theoretically and numerically demonstrate a thermally controlled broadband absorber based on the phase change material Ge2Sb2Te5 (GST). When GST operates in the amorphous state, the proposed metamaterial acts as a broadband nearly p
Externí odkaz:
https://doaj.org/article/0ef7eea8eb544ba195ac5dec0aca10bf
Publikováno v:
IEEE Access, Vol 11, Pp 45961-45971 (2023)
We present a new optical method for the detection of defect in dielectric materials. This method is based on the optical visualization of the microwave near-field distribution around defects in a dielectric material. In this study, we visualized the
Externí odkaz:
https://doaj.org/article/1e6935a4a9d34601bbef0e8a41a5724c
Autor:
Jan C. Balzer, Clara J. Saraceno, Martin Koch, Priyansha Kaurav, Ullrich R. Pfeiffer, Withawat Withayachumnankul, Thomas Kurner, Andreas Stohr, Mohammed El-Absi, Ali Al-Haj Abbas, Thomas Kaiser, Andreas Czylwik
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 1, Pp 268-288 (2023)
Terahertz (THz) systems open up the possibility of new applications of electromagnetic waves. Enormous bandwidths up to several terahertz enable the development of powerful spectroscopy systems that can provide insights into the structure and materia
Externí odkaz:
https://doaj.org/article/15de34e22e344279948599f822d0dee4
Autor:
Yuanchao Wu, Yinan Li, Guangnan Song, Haofeng Dou, Dandan Wen, Pengfei Li, Xiaojiao Yang, Rongchuan Lv, Hao Li
Publikováno v:
Remote Sensing, Vol 16, Iss 5, p 767 (2024)
For an aperture synthesis radiometer (ASR), the visibility and the modified brightness temperature (BT) are related to the Fourier transform when the distance between the system and the source is in the far-field region. BT reconstruction can be achi
Externí odkaz:
https://doaj.org/article/0d63ce6c37db4b0796ae83301ba46dc3
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