Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Constantinos L. Zekios"'
Autor:
Anand K. Mishra, Nicholas E. Russo, Hyeon Seok An, Constantinos L. Zekios, Stavros V. Georgakopoulos, Robert F. Shepherd
Publikováno v:
Advanced Intelligent Systems, Vol 6, Iss 8, Pp n/a-n/a (2024)
Two of the main challenges in origami antenna designs are creating a reliable hinge and achieving precise actuation for optimal electromagnetic (EM) performance. Herein, a waterbomb origami ring antenna is introduced, integrating the waterbomb origam
Externí odkaz:
https://doaj.org/article/ea0ba69164a44f99b4fd200cac1523f8
Publikováno v:
IEEE Access, Vol 12, Pp 120777-120787 (2024)
This work presents a deep neural network (DNN)-based approach for identifying the modal field distributions of closed non-radiating waveguides. Specifically, physics-informed neural networks (PINNs) are used to solve the Helmholtz partial differentia
Externí odkaz:
https://doaj.org/article/d1ab8b6b9b2b4f1a9577483263995af5
Publikováno v:
IEEE Access, Vol 12, Pp 39737-39747 (2024)
This study investigates the use of deep learning techniques for building a generalized surrogate model that can accurately and very efficiently predict antenna performance parameters. Notably, we focus on applications where a substantial amount of si
Externí odkaz:
https://doaj.org/article/0aa11ddef69e4c9fa0261b455f4178a5
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Holographic phase-shifting surfaces (PSSs) have been proven to offer a cost-effective solution for enabling passive arrays to mechanically steer their beams toward desired directions. However, even though the principle of operation of PSSs i
Externí odkaz:
https://doaj.org/article/e53ffc8160a34ac68a3942cbe0476961
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 4, Pp 1095-1102 (2023)
Frequency pulling technique (FPT) is a recently developed method for increasing the bandwidth (BW) of microstrip antennas. It is based on the insertion loss methodology used for the design of bandpass filters. Namely, to apply this technique, the res
Externí odkaz:
https://doaj.org/article/46a6827dd50b4c46b668f597b418f149
Autor:
Akash Biswas, Constantinos L. Zekios, Collin Ynchausti, Larry L. Howell, Spencer P. Magleby, Stavros V. Georgakopoulos
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-16 (2022)
Abstract Microwave absorbers have been used to mitigate signal interference, and to shield electromagnetic systems. Two different types of absorbers have been presented: (a) low-cost narrowband absorbers that are simple to manufacture, and (b) expens
Externí odkaz:
https://doaj.org/article/caa65c882dc442099e276a02171e081c
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 613-626 (2022)
In a multi-objective optimization process, several goals are traditionally combined into a single fitness function. In such cases, the choice of the objective function is critical, as it should accurately represent the desired optimization goals. Her
Externí odkaz:
https://doaj.org/article/0abe527ec8e24155ae2c9aadaaa743a3
Autor:
Konstantinos D. Paschaloudis, Constantinos L. Zekios, Stavros V. Georgakopoulos, George A. Kyriacou
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 287-303 (2022)
A novel Green’s function-free characteristic modes formulation is introduced in this work. The desired impedance or admittance matrix is obtained utilizing and appropriately modifying the versatile finite element method. For this purpose, the gener
Externí odkaz:
https://doaj.org/article/3ddfa13adf264ab39fac3ed4e1f2fc65
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 958-969 (2022)
This work introduces an extremely low profile ( $0.4\lambda _{high}$ ) planar ultra-wideband dual-polarized reflectarray. The unit-cell structure of the array is modular in nature, and without any electrical connection between adjacent unit-cells. Th
Externí odkaz:
https://doaj.org/article/186cc568fb3f44539017bf371be4e5b2
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 2, Pp 118-125 (2021)
In this article, an elegant approach is presented for designing multi-band multi-mode rectangular microstrip antennas (MSAs) with high isolation between the bands. The coupling properties of a gap (an extended slot), which is introduced in a rectangu
Externí odkaz:
https://doaj.org/article/50f5efaf5d484c5b9f396d5624b5b54e