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Multibeam by Metasurface Antennas
IEEE Transactions on Antennas and Propagation, 2017 We explore various possibilities for designing multibeam antennas using a single metasurface (MTS) aperture. Both single-source and multisource feeding schemes are considered. For the single-source case, two approaches are investigated. In the first one, the MTS aperture is divided into several angular sectors, each one devoted to the formation of a ...
Goutam Chattopadhyay +2 more
exaly +5 more sources
Bi-Directional Fabry–Perot Cavity Antenna Based on Polarization-Dependent Transmit–Reflect Metasurface [PDF]
SensorsMetasurfaces (MSs) have been an effective method for the manipulation of electromagnetic (EM) radiation. However, this research mainly focused on controlling single-directional radiation. In this paper, a Fabry–Perot cavity (FPC) antenna based on the MSs
Yanfei Ren +7 more
doaj +2 more sources
System-Level Assessment of Ka-Band Digital Beamforming Receivers and Transmitters Implementing Large Thinned Antenna Array for Low Earth Orbit Satellite Communications [PDF]
SensorsIn this paper, we present a system-level model of a digital multibeam antenna designed for Low Earth Orbit satellite communications operating in the Ka-band.
Giovanni Lasagni +7 more
doaj +2 more sources
IEEE Access, 2021 In this paper, we present a general closed-form solution of trifocal Rotman lens beamforming network (TFRL-BFN) design to excite a conformal phased array of antennas for multibeam radiations.
Hsi-Tseng Chou, Danai Torrungrueng
doaj +1 more source
Sensors, 2020 Broadband communication satellites in Ka-band commonly use four reflector antennas to generate a multispot coverage. In this paper, four different multibeam antenna farms are proposed to generate the complete multispot coverage using only two multibeam ...
Daniel Martinez-de-Rioja +4 more
doaj +1 more source
Statistically Thinned Array Antennas for Simultaneous Multibeam Applications
IEEE Access, 2022 Statistically thinned array antennas are usually employed to form single-beam radiation patterns. In this work, the possibility to adopt such type of antennas to obtain multiple-beam patterns is successfully explored.
Giovanni Buonanno +2 more
doaj +1 more source
An Ultra-Wideband Ridged Biconical Multibeam Antenna
IEEE Access, 2023 This paper presents an ultra-wideband multibeam antenna with eight radiating elements that are connected to the central cylindrical part. Each radiating element consists of a TEM horn fed by a coaxial to ridged planar waveguide transition. The connection
Mahdi Zoghi +2 more
doaj +1 more source
IEEE Journal of Microwaves, 2021 Orthogonality in multibeam antennas is revisited. The difference between orthogonal beamforming and zero-forced beamforming is highlighted. The intriguing relation between orthogonality, reciprocity and losses is recapitulated.
Yanki Aslan +4 more
doaj +1 more source
New Reflector Shaping Methods for Dual-Reflector Antenna [PDF]
Radioengineering, 2022 In the fifth-generation (5G) mobile system, new millimeter-wave technologies such as small cell size and multibeam operation are introduced at the base station.
K. Quzwain +4 more
doaj
Rapid Test Method for Multi-Beam Profile of Phased Array Antennas
Sensors, 2021 The measurement of the phased array antenna (PAA) is completely different from the traditional antenna, due to its multi beam patterns. Usually, each beam pattern of the PAA needs a separate measurement, which makes the overall time extremely long. Thus,
Qingchun Luo +5 more
doaj +1 more source