High performance underwater UHF radio antenna development

Mendez, Héctor Fabián Guarnizo; Gac, Christian; Pennec, François Le; Person, Christian

doi:10.1109/oceans-spain.2011.6003480

Cited by 13 publications

(7 citation statements)

References 6 publications

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“…We can observe that, as it was observed for freshwater, the specific attenuation factor is underestimated. That deviation was also pointed out in [17][18] at 2.4 GHz, and the authors found that the empirical data in [12] estimates an additional loss of 4 dB/cm that must be sum to the estimated factor. That result was also confirmed for our working conditions at 2.4 GHz, but not in the whole range of frequencies of the study.…”

Section: B Resultssupporting

confidence: 52%

Influence of temperature on signal attenuation at microwaves frequencies underwater

Reyes-Guerrero

Ciamulski

2015

OCEANS 2015 - Genova

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New wireless applications are emerging subsea. Pinless Subsea Connectors (PSC) aim to transfer high-speed data over short distances. They present several advantages in comparison with previous technologies. However, its design presents several challenges that need to be addressed. For PSC based on electromagnetic signaling, one of the principal factors affecting system planning is signal attenuation. This work characterizes the impact of water temperature on signal attenuation in both freshwater and seawater. We present experimental data in the 0.5-3.5 GHz band at two typical values for the water temperature (5 and 22 °C). The study confirms that higher temperatures may help to enlarge system coverage in freshwater. However, the opposite effect is found in seawater. The obtained patterns of attenuation with the temperature are in agreement with the available empirical data. However, we also show that available data bases are not accurate enough for estimating signal attenuation for the presented working conditions.

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Section: B Resultssupporting

confidence: 52%

Influence of temperature on signal attenuation at microwaves frequencies underwater

Reyes-Guerrero

Ciamulski

2015

OCEANS 2015 - Genova

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“…Research in the field of underwater communications continues to generate a lot of interest worldwide, due to a wide range of applications that this technology covers, which include: offshore oil and gas field monitoring, coastline protection and surveillance, oceanographic data collection which will require data exchange between two or more Autonomous Underwater Vehicles (AUVs) and underwater environmental observation for exploration [1,2]. It is also a known fact that acoustic and ultrasonic systems have been a standard technology for underwater communications as they are typically good for long range communications (up to tens of kilometers).…”

Section: Introductionmentioning

confidence: 99%

Analysis of J-Pole antenna configurations for underwater communications

Aboderin

Inacio

Santos

et al. 2016

OCEANS 2016 MTS/IEEE Monterey

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The capability of relatively high-speed short-range communications of Autonomous Underwater Vehicles (AUVs) in underwater scenarios, for example, for communication between vehicles or when the AUV is approaching a docking station for downloading of data gathered during a survey mission, is becoming a relevant application in the context of sea exploration and mining. In this paper the analysis of the J-pole antenna and two of its configurations namely Super J-pole and Collinear J-pole antennas are presented, aimed at improving the propagation distance and data rates when such antennas are installed on AUV for onward usage in underwater communications. The performance of these three antennas is assessed through simulation in fresh and sea water, operating in the High Frequency (HF) band. These antennas are compared in terms of bandwidth and directivity which are important elements in the transmission and reception of electromagnetic signals. The results obtained show that these antennas will be desirable both for improved data rates and propagation distance in fresh and sea water. The antennas were designed with FEKO electromagnetic simulation software.

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“…Nevertheless, this attenuation feature could be beneficial for short-range subsea applications, because it ensures non-interference with other EM signals. Recently, some developments have shown that the 2.4 GHz band is of tremendous interest for several configurations [12][13][14]. Previous studies have demonstrated the potential of this band in terms of signal propagation under several conditions [15,16].…”

Section: Introductionmentioning

confidence: 99%

On the Path Loss Model for 5-GHZ Microwave-Based Pinless Subsea Connectors

Guerrero¹,

Mabrouk²,

Al-Hassan³

et al. 2019

PIER Letters

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In this work, a simple propagation channel model for microwave-based pinless subsea connectors in the 5 GHz band is presented. Both high electromagnetic attenuation in seawater due to absorption and the near-field working conditions typically present for underwater connectors are taken into consideration. Therefore, a simplified path loss model based on linear regression is identified. The study shows that high-speed pinless subsea connectors are a reality over several cm of seawater gap when appropriate microwave receiver technology is selected with sensitivities of about −100 dBm. Experimental results show that both half-duplex gigabits-per-second and full-duplex 100-Mbps technologies have a strong potential to be developed in the 5 GHz band.

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High performance underwater UHF radio antenna development

Abstract: This study presents the development of a UHF radio antenna for underwater transmissions in order to rapidly transmit large size files and real-time video.

Cited by 13 publications

References 6 publications

Influence of temperature on signal attenuation at microwaves frequencies underwater

Influence of temperature on signal attenuation at microwaves frequencies underwater

Analysis of J-Pole antenna configurations for underwater communications

On the Path Loss Model for 5-GHZ Microwave-Based Pinless Subsea Connectors

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