Results 61 to 70 of about 2,996 (222)
IEEE Access, 2023 This paper presents a dual-band metal-only antenna that operates at 20 and 40 GHz. The unit cell consists of a square waveguide with short circuit termination and a square metallic block in the center. Its performance is evaluated and analyzed in detail.
Zhihang An +4 more
doaj +1 more source
Single‐Layer Reflectarray Providing Broadband Linear‐to‐Circular Polarization Conversion
Microwave and Optical Technology Letters, Volume 67, Issue 2, February 2025.ABSTRACT This paper introduces a single‐layer reflectarray (RA) design capable of converting incoming linearly polarized waves into outgoing circularly polarized ones while focusing the beam. The design employs nonresonant unit cells, extending the classical concept of meander‐line polarizers.
Samara Gharbieh +4 more
wiley +1 more source
A planar integrated folded reflectarray antenna with circular polarization [PDF]
, 2016 This communication presents the complete design of a circularly polarized (CP) folded reflectarray (FRA) antenna with an integrated planar structure for the first time in the open literature.
Gao, Steven +4 more
core +1 more source
A Ka-Band High-Efficiency Transparent Reflectarray Antenna Integrated With Solar Cells
IEEE Access, 2018 A transparent reflectarray antenna integrated with solar cells is presented for satellite communications in the paper. The electromagnetic characteristics of solar cells at Ka-band are investigated, and a sub-wavelength X-shaped dipole element is ...
Wenxing An +5 more
doaj +1 more source
Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS [PDF]
, 2012 Some of the most recent developments in reconfigurable reflectarrays using surface-mounted RF-MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper.
Arrebola Baena, Manuel +3 more
core +3 more sources
Systematic Framework for Reflectarray Synthesis Based on Phase Optimization
International Journal of Antennas and Propagation, 2012 A new systematic synthesis framework for reflectarray antennas is discussed. Optimization based on the Levenberg-Marquardt algorithm is used to obtain the phase distribution of the reflection coefficients required on the reflectarray surface, in order to
J. Álvarez +3 more
doaj +1 more source
An Inhomogeneously‐Loaded Diaphragm in a Microwave Rectangular Waveguide
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.This study presents a method to control resonant transmission in a dielectric‐loaded slot within a thick conducting diaphragm embedded in a rectangular waveguide. By introducing a gap with a different dielectric constant, we can manipulate the overlap of Fabry–Perot and Fano resonances, demonstrating potential applications as a bandpass filter with a ...
Abdulaziz H. Haddab, Edward F. Kuester
wiley +1 more source
Stretchable-Substrate-Impregnated Fabric: Deployable Reflectarray Antennas for CubeSats
IEEE AccessThis paper proposes a stretchable-substrate-impregnated fabric for deployable high-gain antenna for small satellites. Constellations of small satellites offer worldwide coverage of wireless communication and earth observation; high-gain antennas are ...
Masato Machida +3 more
doaj +1 more source
Bandwidth Performances of Reconfigurable Reflectarrays: State of Art and Future Challenges [PDF]
Radioengineering, 2018 Reconfigurable antennas allow to meet the increasing demands of modern RF communication systems for reconfiguration capabilities, such as beam-steering, multi-band operation, polarization flexibility or frequency agility.
S. Costanzo +4 more
doaj
Mechanically Reconfigurable, Beam-Scanning Reflectarray and Transmitarray Antennas: A Review
Applied Sciences, 2021 We review mechanically reconfigurable reflectarray (RA) and transmitarray (TA) antennas. We categorize the proposed approaches into three major groups followed by a hybrid category that is made up of a combination of the three major approaches.
Mirhamed Mirmozafari +6 more
doaj +1 more source