Results 61 to 70 of about 5,669 (203)

Bandwidth Behavior of Closely Spaced Aperture-Coupled Reflectarrays

International Journal of Antennas and Propagation, 2012
The bandwidth features of reflectarray antennas are analyzed by examining in detail the phase errors due to the compensation mechanism for spatial phase delays.
F. Venneri, S. Costanzo, G. Di Massa
doaj   +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, Wang, Y, Wei, Gao, Zhang, C, Zhu, Fuguo   +4 more
core   +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, Renaud Loison, Akil Jrad, Ali Harmouch, María García‐Vigueras   +4 more
wiley   +1 more source

High-Efficiency Dielectric Reflectarray Antennas With Ultra-Wideband Characteristics

IEEE Access, 2021
In this study, a K-band offset dielectric reflectarray antenna, having high aperture efficiency and ultra-wideband characteristics, was designed. A column-type dielectric unit cell was employed for the dielectric reflectarray elements.
Eun-Cheol Choi, Sangwook Nam
doaj   +1 more source

1‐Bit reconfigurable reflectarray antenna with T‐shaped parasitic structure

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
An electronically 1‐bit reconfigurable reflectarray antenna (RRA) with wide‐angle beam‐scanning and high efficiency performance is presented. A 180‐degree phase difference can be generated by controlling the state of the PIN dipole in the configurable element comprising a double split ring (DSR) patch and two T‐shaped parasitic structures.
Sen Li, Yang Cai, Hong Ma, Lijun Bu, Siyu Qi, Yufan Cao, Tao Wu   +6 more
wiley   +1 more source

Performance Evaluation of a High-Gain Axisymmetric Minkowski Fractal Reflectarray for Ku-Band Satellite Internet Communication

Fractal and Fractional
In this article, a high-gain axisymmetric Minkowski fractal reflectarray is designed and fabricated for Ku-Band satellite internet communications. High gain is achieved here by carefully optimising the number of unit cells, their shape modifier, focal ...
Prabhat Kumar Patnaik, Harish Chandra Mohanta, Dhruba Charan Panda, Ribhu Abhusan Panda, Malijeddi Murali, Heba G. Mohamed   +5 more
doaj   +1 more source

A reflectarray Using a Dielectric Discretized Concave Mirror Based on Electromagnetic Band Gap [PDF]

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a reflectarray antenna with an innovative dielectric mirror in the form of a discretized concave reflector. The mirror, manufactured via 3D printing, combines dielectric and air layers, forming an Electromagnetic Band Gap (EBG) that ...
Gustavo Maciulis Dip, Fatima Salete Correra   +1 more
doaj   +1 more source

Infrared polarizing reflectarray metasurfaces [PDF]

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
An infrared-frequency polarizing reflectarray is designed with a phase-amplitude synthesis method at 4μm wavelength. The proposed phase-amplitude synthesis method is based on the optimization of the axial ratio of the steered beam through the reflection phase and amplitude of reflectarray elements. The proposed reflectarray reradiates an incoming slant
Mehdi Veysi, Caner Guclu, Ozdal Boyraz, Filippo Capolino   +3 more
openaire   +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

Tunable Reflectarray Cell for Wide Angle Beam-Steering Radar Applications

Journal of Electrical and Computer Engineering, 2013
An electronically tunable reflectarray element is proposed in this work to design beam-steering antennas useful for radar applications. A reduced size reflectarray unit cell is properly synthesized in order to extend the antenna beam scanning ...
F. Venneri, S. Costanzo, G. Di Massa
doaj   +1 more source