Advanced Communications Technology Satellite (ACTS): four-year system performance

Acosta, R.; Bauer, Robert A.; Krawczyk, Richard; Reinhart, Richard C.; Zernic, Michael J.; Gargione, Frank

doi:10.1109/49.748783

Cited by 14 publications

(4 citation statements)

References 8 publications

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“…Due to the high atmospheric absorption and attenuation, the K band is less suitable for longrange data communication. Ka band is used in a variety of applications, including police speed enforcement (n257, n259, n260, and n261), 5G mobile networks (n257, n259, n260, and n261), and communication satellites such as the NASA Kepler Mission, ACTS Gigabit Satellite Network, K-1 satellite, Space X Starlink, Iridium Next, SES O3b System, James Webb Space Telescope, and Project Ku [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a 5G Wideband Antenna for Wireless Body-Centric Network

Khan

Rahman

Shovon

et al. 2022

Wireless Communications and Mobile Computing

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A compact 5G wideband antenna for body-centric network (BCN) operating on Ka band has been presented in this paper. The design of the antenna consists of a very simple key-shaped radiator patch with a vertical slot for better impedance matching. The antenna was designed and simulated with the help of the Computer Simulation Technology (CST) Microwave Studio Suite, a well-liked and dependable electromagnetic simulation program running on Microsoft Windows. Free-space simulation produces a resonant frequency at 28 GHz, which falls under the Ka band and 5G’s n257, more precisely n261. The proposed antenna has a size of 1.24 λ × 0.6 λ × 0.153 λ and has a wider impedance bandwidth of more than 20 GHz. The antenna’s gain and radiation efficiency are 3.87 dBi and 70%, respectively, at the resonant point. Further parametric studies reveal that the antenna can be activated in the V-band by increasing the feedline width. The antenna is proposed for the application of BCN. Therefore, a three-dimensional human torso phantom was developed virtually to test on-body performance. The on-body findings of this antenna were resimulated by positioning the antenna in close proximity to the three-layer human body model, where 22.5 dB of on-body reflection coefficient was recorded at 28 GHz. Simulated on-body gain and efficiency were 4.56 dBi and 61.33 percent, respectively. A distance-based investigation was conducted to investigate the impacts of the human body’s presence by positioning the antenna at five different distances from the human torso model. The findings were compared to assess how distance affects its behaviors. The antenna’s gap was kept at 6 mm for the optimum results, which included 4.83 dBi of gain with a 66 percent efficiency and a recorded RL value of about 23 dB. The on-body simulations produced very consistent results with a slight deviation after 26.5 GHz, even though the distance was varied.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of a 5G Wideband Antenna for Wireless Body-Centric Network

Khan

Rahman

Shovon

et al. 2022

Wireless Communications and Mobile Computing

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“…In this paper, we present the design, construction and test results for a multi-band multi-tone tunable mm-wave frequency synthesize based on the discrete frequency spectrum produced by a solid-state frequency comb generator (FCG). Unlike the single frequency beacon source, which flew on NASA's Advanced Communications Technology Satellite (ACTS) [2] for Ka-band propagation experiments [3], the multi-tone frequency synthesizer is capable of simultaneously delivering coherent multiple frequencies. These multiple frequencies enable wide band characterization of the frequency dependent group delay effects, which are essential for the design of robust high throughput multi-Gbps data rate future space-to-ground satellite communication links.…”

Section: Introductionmentioning

confidence: 99%

Multi-band multi-tone tunable millimeter-wave frequency synthesizer for satellite beacon transmitter

Simons

Wintucky

2016

2016 IEEE MTT-S International Microwave Symposium (IMS)

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This paper presents the design and test results of a multi-band multi-tone tunable millimeter-wave frequency synthesizer, based on a solid-state frequency comb generator. The intended application of the synthesizer is in a satellite beacon transmitter for radio wave propagation studies at K-band (18 to 26.5 GHz), Q-band (37 to 42 GHz), and E-band (71 to 76 GHz). In addition, the architecture for a compact beacon transmitter, which includes the multi-tone synthesizer, polarizer, horn antenna, and power/control electronics, has been investigated for a notional space-to-ground radio wave propagation experiment payload on a small satellite. The above studies would enable the design of robust high throughput multi-Gbps data rate future space-to-ground satellite communication links.

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“…[1]. Beginning in August of 1998, ACTS began to operate in an inclined orbit of 0.8 degrees per year.…”

Section: Introductionmentioning

confidence: 99%

Ka band system and propagation effects on system performance

Acosta

Johnson

2000

18th International Communications Satellite Systems Conference and Exhibit

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Abstract-The Advanced Communication Technology Satellite (ACTS) is an experimental communications satellite system launched in September 1993. ACTS introduces many new technologies, including operation in the Ka frequency band. ACTS uses multiple hopping narrow beams and very small aperture terminal (VSAT) technology to establish a system availability of 99.5% for a bit-error-rates of 5x10 -7 or better over the continental United States. In order to maintain a minimum system availability of 99.5% over all US rain zones ACTS uses an adaptive rain fade compensation protocol to reduce the impact of signal attenuation resulting from propagation effects. The purpose of this paper is to present the results of system and sub-system characterization considering the statistical effects of system variances due to thermal and propagation effects over 6 years of ACTS operation including inclined orbit.

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Advanced Communications Technology Satellite (ACTS): four-year system performance

Cited by 14 publications

References 8 publications

Design and Analysis of a 5G Wideband Antenna for Wireless Body-Centric Network

Design and Analysis of a 5G Wideband Antenna for Wireless Body-Centric Network

Multi-band multi-tone tunable millimeter-wave frequency synthesizer for satellite beacon transmitter

Ka band system and propagation effects on system performance

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