Batra, Aman, Vu, Viet T., Zantah, Yamen, Wiemeler, Michael, Pettersson, Mats I., Goehringer, Diana, and Kaiser, Thomas
2020 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM) Microwaves for Intelligent Mobility (ICMIM), 2020 IEEE MTT-S International Conference on. :1-4 Nov, 2020
Rehman Kazim, Jalil ur, Abohmra, Abdoalbaset, Al-Hasan, Muath, Ben Mabrouk, Ismail, Ur-Rehman, Masood, Sheikh, Fawad, Kaiser, Thomas, Imran, Muhammad Ali, and Abbasi, Qammer H
2020 Third International Workshop on Mobile Terahertz Systems (IWMTS) Mobile Terahertz Systems (IWMTS), 2020 Third International Workshop on. :1-4 Jul, 2020
Solbach, Klaus, Abbas, Ali Alhaj, El-Absi, Mohammed, Abuelhaija, Ashraf, and Kaiser, Thomas
2020 Third International Workshop on Mobile Terahertz Systems (IWMTS) Mobile Terahertz Systems (IWMTS), 2020 Third International Workshop on. :1-4 Jul, 2020
Alissa, Mai, Sheikh, Fawad, Zarifeh, Nidal, Kreul, Theo, and Kaiser, Thomas
2020 IEEE International Conference on Computational Electromagnetics (ICCEM) Computational Electromagnetics (ICCEM), 2020 IEEE International Conference on. :14-16 Aug, 2020
Thanthrige, Udaya S. K. P. Miriya, Barowski, Jan, Rolfes, Ilona, Erni, Daniel, Kaiser, Thomas, and Sezgin, Aydin
Subjects
Electrical Engineering and Systems Science - Signal Processing
Abstract
Estimating parameters and properties of various materials without causing damage to the material under test (MUT) is important in many applications. Thus, in this letter, we address this by wireless sensing. Here, the accuracy of the estimation depends on the accurate estimation of the properties of the reflected signal from the MUT (e.g., number of reflections, their amplitudes and time delays). For a layered MUT, there are multiple reflections and, due to the limited bandwidth at the receiver, these reflections superimpose each other. Since the number of reflections coming from the MUT is limited, we propose sparse signal processing (SSP) to decompose the reflected signal. In SSP, a so called dictionary is required to obtain a sparse representation of the signal. Here, instead of a fixed dictionary, a dictionary update technique is proposed to improve the estimation of the reflected signal. To validate the proposed method, a vector network analyzer (VNA) based measurement setup is used. It turns out that the estimated dielectric constants are in close agreement with the dielectric constants of the MUTs reported in literature. Further, the proposed approach outperforms the state-of-the-art model-based curve-fitting approach in thickness estimation. Comment: 5 Pages, Accepted in IEEE Sensor Letters, Sept. 2020
Alissa, Mai, Friederich, Benedikt, Kolpatzeck, Kevin, Czylwik, Andreas, and Kaiser, Thomas
2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019 IEEE MTT-S International Microwave Workshop Series on. :100-102 Jul, 2019
Sheikh, Fawad, Mabrouk, Ismail B., Alomainy, Akram, Abbasi, Qammer H., and Kaiser, Thomas
2019 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP) Advanced Materials and Processes for RF and THz Applications (IMWS-AMP), 2019 IEEE MTT-S International Microwave Workshop Series on. :28-30 Jul, 2019
Sheikh, Fawad, Lessy, Dien, Alissa, Mai, and Kaiser, Thomas
2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Mobile Terahertz Systems (IWMTS), 2018 First International Workshop on. :1-6 Jul, 2018
El-Absi, Mohammed, Abbas, Ali Al-Haj, Abuelhaija, Ashraf, Solbach, Klaus, and Kaiser, Thomas
2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Mobile Terahertz Systems (IWMTS), 2018 First International Workshop on. :1-5 Jul, 2018
Batra, Aman, Wiemeler, Michael, Kreul, Theo, Goehringer, Diana, and Kaiser, Thomas
2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Mobile Terahertz Systems (IWMTS), 2018 First International Workshop on. :1-6 Jul, 2018
2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Mobile Terahertz Systems (IWMTS), 2018 First International Workshop on. :1-6 Jul, 2018
2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019 IEEE International Symposium on. :2079-2080 Jul, 2019
Sheikh, Fawad, Alissa, Mai, Zahid, Adnan, Abbasi, Qammer H., and Kaiser, Thomas
2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019 IEEE International Symposium on. :2137-2138 Jul, 2019
Zahid, Adnan, Abbas, Hasan T., Sheikh, Fawad, Kaiser, Thomas, Zoha, Ahmed, Imran, Muhammad, and Abbasi, Qammer H.
2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019 IEEE International Symposium on. :379-380 Jul, 2019
Sperrhake, Jan, Falkner, Matthias, Fasold, Stefan, Kaiser, Thomas, and Pertsch, Thomas
Phys. Rev. B 102, 245108 (2020)
Subjects
Physics - Optics and Condensed Matter - Mesoscale and Nanoscale Physics
Abstract
We show the existence of virtual polarization states during the interaction of modes in metasurface stacks. In support of our findings we experimentally realize a metasurface stack, consisting of an isotropic layer of nano-patches and an anisotropic layer of nano-wires. Utilizing an analogy to the interaction of electrons at junctions in mesoscopic electron transport via Feynman paths, we present a semi-analytical description of the modal interaction inside this stack. We then derive a series of all possible reflection paths light can take inside the metasurface stack. Comment: 7 pages, 5 figures
