Preliminary simulations of flat and parabolic reflectarray antennas to generate a multi‐spot coverage from a geostationary satellite

Martinez‐de‐Rioja, Daniel; Martinez‐de‐Rioja, Eduardo; Encinar, José A.; Rodríguez-Vaqueiro, Yolanda; Pino, A.G.

doi:10.1049/iet-map.2019.0952

Cited by 4 publications

(6 citation statements)

References 21 publications

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“…The 1.8 m parabolic reflectarray antenna has been simulated considering the same cluster of feeds as in the previous design, producing a four-color coverage of 64 beams similar to that shown in Figure 7. There are no appreciable differences between the simulated radiation patterns of both flat and parabolic reflectarrays (a comparison between the antenna performances of flat and parabolic reflectarrays to produce four beams per feed can be seen in detail in [19]).…”

Section: Parabolic Transmit Reflectarray To Generate Four Spaced Beammentioning

confidence: 99%

“…The phase distributions in Figure 9 show a great improvement w respect to the equivalent distributions for a flat reflectarray (see Figure 6), presenti smooth phase variations and a reduced number of 360° cycles. The 1.8 m parabolic refl tarray antenna has been simulated considering the same cluster of feeds as in the previo design, producing a four-color coverage of 64 beams similar to that shown in Figure There are no appreciable differences between the simulated radiation patterns of both f and parabolic reflectarrays (a comparison between the antenna performances of flat a parabolic reflectarrays to produce four beams per feed can be seen in detail in [19]). The results obtained for this (flat or parabolic) antenna farm show that a single flectarray with 27 feeds would produce a four-color coverage of 108 beams only in the or Rx link of the Ka-band, so two reflectarrays would be needed to generate a comple multispot coverage both in Tx and Rx.…”

Section: Parabolic Transmit Reflectarray To Generate Four Spaced Beammentioning

confidence: 99%

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Multibeam Reflectarrays in Ka-Band for Efficient Antenna Farms Onboard Broadband Communication Satellites

Martinez‐de‐Rioja

Rodríguez-Vaqueiro

et al. 2020

Sensors

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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 reflectarrays, making it possible to halve the number of required antennas onboard the satellite. The proposed solutions include flat and curved reflectarrays with single or dual band operation, the operating principles of which have been experimentally validated. The designed multibeam reflectarrays for each antenna farm have been analyzed to evaluate their agreement with the antenna requirements for real satellite scenarios in Ka-band. The results show that the proposed configurations have the potential to reduce the number of antennas and feed-chains onboard the satellite, from four reflectors to two reflectarrays, enabling a significant reduction in cost, mass, and volume of the payload, which provides a considerable benefit for satellite operators.

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Section: Parabolic Transmit Reflectarray To Generate Four Spaced Beammentioning

confidence: 99%

Section: Parabolic Transmit Reflectarray To Generate Four Spaced Beammentioning

confidence: 99%

Multibeam Reflectarrays in Ka-Band for Efficient Antenna Farms Onboard Broadband Communication Satellites

Martinez‐de‐Rioja

Rodríguez-Vaqueiro

et al. 2020

Sensors

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“…The dual band operation in the reflectarray can be defined to generate adjacent beams at each sub-band for the Tx link (or the Rx link). However, the independent operation at close frequencies makes the antenna performance unstable in band, requiring heavy optimizations of the printed elements on the reflectarray surface [17].…”

Section: Introductionmentioning

confidence: 99%

Parabolic reflectarray antenna to generate multiple beams for geostationary high throughput satellites in Ka-band

Martinez‐de‐Rioja

Rodríguez-Vaqueiro

et al. 2022

Int. J. Microw. Wireless Technol.

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This contribution describes the design and simulations of a multibeam 1.8 m parabolic reflectarray antenna for geostationary high throughput satellites (HTS) in Ka-band. The parabolic reflectarray generates two orthogonal circularly polarized beams per feed simultaneously at 19.7 and 29.5 GHz, by the variable rotation technique. The antenna is made of 62 654 reflectarray cells, which include two types of printed elements independently rotated and adjusted. The elements have been optimized one by one to ensure the required phase-shift at each frequency. A novel design approach has made it possible to promptly obtain an initial layout of every element with a very low computational cost. The simulated radiation patterns show that the parabolic reflectarray, illuminated by 27 dual-circularly polarized feeds, can generate 54 spot-beams in two orthogonal polarizations, with a beam spacing of 0.56° between adjacent beams. The design and simulation tools have been validated by a parabolic reflectarray scaled in a factor of 0.5, which has been manufactured and tested. The proposed reflectarray would allow to generate a complete multi-spot coverage from a geostationary HTS with only two parabolic reflectarrays, instead of four reflector antennas, also reducing the number of feeds by half, since every feed generates two beams.

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“…With the rapid development of 5G communication, the demand for high‐gain antennas has greatly increased, and the research on high‐gain antennas has aroused the interest of a large number of researchers. Traditional high‐gain antennas are mainly parabolic antennas and microstrip array antennas, which are large in size, low insensitivity, and difficult to manufacture1 1 . The metasurface provides a new solution to the shortcomings of traditional high‐gain array antennas, 2 In recent years, metasurfaces have been widely used in the microwave, millimeter‐wave, and even light wave absorbers, polarization converters, planar lenses, planar mirrors, vortex wave generators, and so on 3–6 .…”

Section: Introductionmentioning

confidence: 99%

“…Traditional high-gain antennas are mainly parabolic antennas and microstrip array antennas, which are large in size, low insensitivity, and difficult to manufacture1. 1 The metasurface provides a new solution to the shortcomings of traditional high-gain array antennas, 2 In recent years, metasurfaces have been widely used in the microwave, millimeter-wave, and even light wave absorbers, polarization converters, planar lenses, planar mirrors, vortex wave generators, and so on. [3][4][5][6] In the design of high-gain antennas, gradient metasurfaces (GMs) are usually used to adjust the refraction or reflection direction of electromagnetic waves.…”

Section: Introductionmentioning

confidence: 99%

Conformal transmitarray based on metasurface fed by miniaturized filtering antenna

Song¹,

Wang²,

Mengqian³

et al. 2022

Micro & Optical Tech Letters

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To realize the requirements of 5G MIMO technology for high-performance antennas, a novel high-gain transmissive array antenna with conformal capability is designed in this study. The antenna consists of a single-layer dielectric-based conformal transmission array and a substrate-integrated waveguide filter antenna. The transmission array is composed of a cross element and spiral elements that can achieve conformal capability. Each metasurface element is a single-layer medium, and the same metasurface patches above and below are connected by four metal pillars. A filter antenna array fed by a substrate integrated with a waveguide fed by small-scale lowtemperature cofired ceramic technology is used as the feed antenna of the transmission array. The physical test results are consistent with the simulation results, and the directivity of the antenna is greatly improved. The frequency range where the reflection coefficient S11 is less than −10 dB is 26.6-29.1 GHz. At the center frequency of 28.0 GHz, the gain of the conformal antenna array is greatly improved, and the peak gain is increased from 8.2 to 24.5 dB. The sidelobe level is substantially suppressed. Its high gain and beamforming characteristics make it have a high application value in 5G MIMO technology.

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Preliminary simulations of flat and parabolic reflectarray antennas to generate a multi‐spot coverage from a geostationary satellite

Cited by 4 publications

References 21 publications

Multibeam Reflectarrays in Ka-Band for Efficient Antenna Farms Onboard Broadband Communication Satellites

Multibeam Reflectarrays in Ka-Band for Efficient Antenna Farms Onboard Broadband Communication Satellites

Parabolic reflectarray antenna to generate multiple beams for geostationary high throughput satellites in Ka-band

Conformal transmitarray based on metasurface fed by miniaturized filtering antenna

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