An investigation of millimeter wave reflectarrays for small satellite platforms

Ahmad, Ghulam; Brown, Tim; Underwood, Craig; Loh, Tian Hong

doi:10.1016/j.actaastro.2018.06.044

Cited by 3 publications

(4 citation statements)

References 36 publications

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“…5. It is important to mention that the phase range also depends on the substrate's thickness where an electrically thick substrate provides a wideband operation but at the same time will limit phase swing [52,53]. For instance, a substrate thickness of 𝜆/10 gives a phase reflection range of approximately 300° [44].…”

Section: A Multi-resonance Approachmentioning

confidence: 99%

Wideband Reflectarrays for 5G/6G: A Survey

Theoharis

Raad

Tubbal

et al. 2022

IEEE Open J. Antennas Propag.

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Section: A Multi-resonance Approachmentioning

confidence: 99%

Wideband Reflectarrays for 5G/6G: A Survey

Theoharis

Raad

Tubbal

et al. 2022

IEEE Open J. Antennas Propag.

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“…For the satellite cluster system in this paper, all the satellites are equipped with electronically steerable directive antennas, which can achieve high‐speed directional transmitting and receiving between satellites at the mmWave band. According to ITU‐R S.1327 24,28 and taking the actual antenna model for mmWave small satellites as references, 29‐30 the reference antenna radiation pattern of the LEO inter‐satellite system around 60 GHz can be characterized by the following equations:

G_{t x false/ r x} false(ξ_{h}, ω false) = ({, \begin{matrix} left \\ array G_{m a x} - {3 (2 ω / ξ_{h})}^{2} & for & ω \leq a ξ_{h} / 2 \\ array G_{m a x} - 20 & for & a ξ_{h} / 2 < ω \leq b ξ_{h} / 2 \\ array G_{m a x} - 25 \log (2 ω / ξ_{h}) & for & b ξ_{h} / 2 < ω \leq ξ_{1} \\ array 0 & for & ξ_{1} < ω \end{matrix})

where G tx / rx is the gain at the angle ω from the main beam direction in units of dBi. ξ h denotes half‐power beamwidth in units of degrees, and ξ 1 is the value of ξ when G tx / rx in equation

G_{t x false/ r x} = G_{m a x} - 25 normallog false(2 ω false/ ξ_{h} false)

equals to 0 dBi.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

“…Moreover, the radiation pattern and gain performance of the mmWave satellite antenna can be obtained via simulation and measurement in prior, 30 so the antenna patterns are assumed to be known in this paper.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

Interference management via cooperative beam biasing and power control for mmWave satellite clusters

Zhang

Cui

Li³

et al. 2021

Satell Commun Network

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Summary In order to tackle the problem of spectrum scarcity, spectrum sharing among satellite communication systems becomes a common phenomenon. Due to the spectrum sharing, mmWave satellite cluster, which is considered as a prominent part of the space information networks, may suffer severe mutual interference among inter‐satellite data links. In this paper, we firstly conduct the interference analysis for satellite clusters. Then, we formulate the interference problem as a constrained optimization problem in the performance metric of the total achievable data rate. To alleviate the interference between satellite clusters, a particle swarm optimization (PSO)‐based cooperative beam biasing and power control scheme (CBP‐PSO) from the perspectives of the joint beam domain and power domain is proposed. And the interference management problem is transformed to find the best combination of the boresight direction and transmission power based on the improved PSO algorithm. Specially, in the interference analysis and proposed scheme, different satellite cluster formations and antenna configurations are taken into account. Finally, simulation results show that the proposed CBP‐PSO scheme based on cooperative beam biasing and power control can effectively improve the achievable data rate of the interfered data links, even for the severe in‐line interference.

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“…Therefore, it is very important to explore alternative approaches to enable lightweight high-gain antennas that occupy a considerably small fraction of the payload and volume of SmallSats. There have been a handful of initiatives in realizing high-performance lightweight antennas for small satellites 1–3 including Fabry-Pérot cavity antennas 4 , deployable mesh reflectors 5,6 , inflatable balloon reflectors 7 , deployable waveguide slot antennas 8 , and reflectarrays 9 .…”

Section: Introductionmentioning

confidence: 99%

Metasurface-based ultra-lightweight high-gain off-axis flat parabolic reflectarray for microwave beam collimation/focusing

Silva

Rahman

Kort-Kamp

et al. 2019

Sci Rep

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Ultra-lightweight deployable antennas with high-gain are pivotal communication components for small satellites, which are intrinsically constrained in size, weight, and power. In this work, we design and demonstrate metasurface-based ultra-lightweight flat off-axis reflectarrays for microwave beam collimation and focusing, similar to a parabolic dish-antenna. Our ultra-thin reflectarrays employ resonators of variable sizes to cover the full 2π phase range, and are arranged on the metasurface to realize a two-dimensional parabolic focusing phase distribution. We demonstrate a 30° off-axis focusing reflector that exhibits a measured gain of 27.5 dB at the central operating frequency of 11.8 GHz and a 3 dB directionality <1.6°. Furthermore, we carry out full-wave simulations of the reflectarray, showing high gain of the beam focusing/collimation functionality, in good agreement with measurements. The demonstrated reflectarrays will enable low-cost, lightweight, and high-gain deployable transceivers for small-satellite platforms.

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An investigation of millimeter wave reflectarrays for small satellite platforms

Cited by 3 publications

References 36 publications

Wideband Reflectarrays for 5G/6G: A Survey

Wideband Reflectarrays for 5G/6G: A Survey

Interference management via cooperative beam biasing and power control for mmWave satellite clusters

Metasurface-based ultra-lightweight high-gain off-axis flat parabolic reflectarray for microwave beam collimation/focusing

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