Multibeam Reflectarrays in Ka-Band for Efficient Antenna Farms Onboard Broadband Communication Satellites [PDF]
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 +4 more sources
Optimal design of transmitarray antennas via low-cost surrogate modelling [PDF]
Scientific Reports, 2023 Over the recent years, reflectarrays and transmitarrays have been drawing a considerable attention due to their attractive features, including a possibility of realizing high gain and pencil-like radiation patterns without the employment of complex ...
Mehmet A. Belen +4 more
doaj +2 more sources
Novel phase distributions for large electronically beam-scanning reflectarrays [PDF]
Scientific Reports, 2021 In this paper, the hybrid combination of genetic algorithm and particle swarm optimization (GAPSO) is used to optimize the phase distribution (PD) of beam-scanning reflectarray. The GAPSO takes advantage of both conventional algorithms and it could cover
Ahad Sheikholeslami, Zahra Atlasbaf
doaj +2 more sources
Wideband Reflectarrays for 5G/6G: A Survey
IEEE Open Journal of Antennas and Propagation, 2022 Application demand for faster data rates is driving the need for wider operating bandwidth of future 5G/6G communication systems which in turn poses stringent requirements on the design of suitable antennas.
Abbas Jamalipour +2 more
exaly +3 more sources
Analysis and design of terahertz reflectarrays based on graphene cell clusters [PDF]
Scientific Reports, 2022 In this paper, the graphene cell-cluster is introduced, which is composed of an array of identical unit-cells placed in a geometrical configuration. Such graphene cell-clusters are then used for the realization of a reflectarray.
Parinaz Hosseini, Homayoon Oraizi
doaj +2 more sources
Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field [PDF]
Scientific Reports, 2017 Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays.
Woo Jin Byun +2 more
doaj +2 more sources
Investigation of losses on directivity improvement in the graphene reflectarray design [PDF]
Scientific ReportsThe surface-wave generation in microstrip antennas and reflectarray antennas composed of microstrip patches is an unavoidable phenomenon. The incidence of surface-waves on discontinuities and edges results in side-lobe generation and main beam ...
Parinaz Hosseini, Homayoon Oraizi
doaj +2 more sources
On the Role of Reflectarrays for Interplanetary Links
IEEE Open Journal of the Communications SocietyInterplanetary links (IPL) serve as crucial enablers for space exploration, facilitating secure and adaptable space missions. An integrated IPL with inter-satellite communication (IP-ISL) establishes a unified deep space network, expanding coverage and ...
Eray Guven +3 more
doaj +4 more sources
Analysis and Experimental Demonstration of Reflectarray Antennas in Quasi-Regular Lattices
IEEE Open Journal of Antennas and Propagation, 2023 This paper presents investigations on reflectarray antennas using non-periodic element distributions. The study involves the analysis and design of two reflectarrays based on quasi-periodic lattices with rectangular and pentagonal profiles, whose ...
Borja Imaz-Lueje +3 more
doaj +1 more source
Shaped-Pattern Reflectarray Antennas for mm-Wave Networks Using a Simple Cell Topology
IEEE Access, 2022 In this paper, it is proposed the use of ultra-thin reflectarrays in some emerging scenarios in the new mm-wave cellular networks such as 5G, Beyond-5G (B5G), and future 6G.
Borja Imaz-Lueje +4 more
doaj +1 more source