Rf frequency penetration of sea water









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Table 1 shows the Debye parameters of water reported in [5]. It's a lot more convenient than using standard form, when accuracy is not a serious issue. If you want to add two signals together, you have to go back to the linear world antilog or you get nonsense. I assume both transmitter and receiver and immersed.

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Reflectivity Of Electromagnetic Waves At An Air

I think the simple approach is first to work out the free space path loss. Our analytical formulations describe both loss mechanisms. However, strong backscattering caused by suspended particles in water always limits the application of optical systems to very short distances. For such a plane wave penetrating the fresh water, the total power loss is the sum of the transmission loss and propagation loss. For a receiving antenna, only the noise considerations will apply, so efficiency will not matter so much. For example, for parallel polarization, the total loss increases slowly for angles up to 80 degrees, but increases dramatically for larger incident angles.

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Rf communication through salt water

Our analysis relies on plane wave propagation models. Moreover, suspended particles have very little impact on EM waves. In addition, EM waves are less sensitive than acoustic waves to reflection and refraction effects in shallow water. In addition, the transmission loss remains the same for all propagation depths. For example, for a propagation depth of 1 m, the average total loss. Figure 5 illustrates that normal incidence has the least power loss for fixed frequency and propagation depth, since the total attenuation increases along with the incident angle for both polarization cases. Traditionally, underwater communications have been done through acoustic and optical systems that have certain advantages and disadvantages.

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Description: I could detect no resonances between 1 and MHz and the input resistance was always very high. Specifically, the transmission loss and propagation loss of RF waves penetrating into fresh water are calculated for various propagation depths. H Smith 94 , Jul 24, From the results of Figure 6 for the oblique incidence case we observe that there is also an optimum frequency range similar to the one we identified for the normal incidence case. H Smith 94 , Jul 30, Traditionally, underwater communications have been done through acoustic and optical systems that have certain advantages and disadvantages. Even though RF wireless communications are not well suited for seawater due to its high attenuation, our paper illustrates that RF communications from air to fresh water are possible.
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