Zobrazeno 1 - 10
of 439
pro vyhledávání: '"Lotfollah Shafai"'
Publikováno v:
Sensors, Vol 24, Iss 23, p 7535 (2024)
The rise of CubeSats has unlocked opportunities for cutting-edge space missions with reduced costs and accelerated development timelines. CubeSats necessitate a high-gain antenna that can fit within a tightly confined space. This paper is primarily c
Externí odkaz:
https://doaj.org/article/f4ee1220789743a5876119097b0a5bb1
Publikováno v:
Sensors, Vol 23, Iss 9, p 4389 (2023)
Herein, we present new design principles for gain enhancement and cross-polarization suppression in dual-polarized cavity-backed antennas and demonstrate the capability in an octagonal cavity-backed open prism antenna (OCROP). In our approach, the ga
Externí odkaz:
https://doaj.org/article/a754593a2fd84fd8af8dc062064359bf
Publikováno v:
Sensors, Vol 23, Iss 2, p 731 (2023)
Simultaneously enhancing multiple antenna performance parameters is a demanding task, especially with a challenging set of design goals. In this paper, by carefully deriving a compatible set of enhancement techniques, we propose a compact/lightweight
Externí odkaz:
https://doaj.org/article/0e9fc25cedc94db4af3bc482166eae49
Publikováno v:
Sensors, Vol 23, Iss 2, p 846 (2023)
This paper investigates the miniaturization capability of split ring array antennas embedded in a low-permittivity dielectric substrate, in comparison with the same-sized high-permittivity dielectric resonator antennas (DRAs). In order to understand
Externí odkaz:
https://doaj.org/article/cbabd3c770744bd8aea02ea1b6999b2a
Autor:
Navid Rezazadeh, Lotfollah Shafai
Publikováno v:
IEEE Access, Vol 7, Pp 154253-154259 (2019)
Null-steering using adaptive antenna systems is a robust method to global positioning system (GPS) receivers against hostile jamming. Conventionally, multi-antenna arrays have been utilized for such receivers, but the size and weight are often prohib
Externí odkaz:
https://doaj.org/article/2b9d21e426a54191947cd9bfab671ed9
Autor:
Saeed I. Latif, Daniel Flores Tapia, Diego Rodriguez Herrera, Mario Solis Nepote, Stephen Pistorius, Lotfollah Shafai
Publikováno v:
International Journal of Antennas and Propagation, Vol 2015 (2015)
The detailed design equations and antenna parameters for a directional antenna for breast imaging are presented in this paper. The antenna was designed so that it could be immersed in canola oil to achieve efficient coupling of the electromagnetic en
Externí odkaz:
https://doaj.org/article/510e473bdeea4ef48fac9f36b7465023
Publikováno v:
IEEE Transactions on Antennas and Propagation. 70:5324-5334
Publikováno v:
2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
Performance of a microstrip patch antenna over a high impedance electromagnetic bandgap (EBG) structure, covered by a dielectric surface is investigated. While running a study on the effect of design parameters on the antenna performance, an impressi
Publikováno v:
2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
Previously, we proposed an L-band dual-polarized flat wire open loop antenna with wide bandwidth and low cross-polarization. In this work, we extend our study to its array form to improve the antenna gain. A triangular lattice is adopted to minimize
Publikováno v:
2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM).
This work investigates the frequency scalability of a dual-polarized flat-wire open loop antenna with wide bandwidth and low cross-polarization. Previously, we demonstrated the concept for an L-band design and in this work we extend the analysis to c