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ElfaroLAB
9 posts

ElfaroLAB
@elfarolab
electronics design, engineering and product development
Katılım Eylül 2024
242 Takip Edilen11 Takipçiler

@ElecNotes @BBCTech maybe self autogeneration and autoconsume, no centrals, no dependencies
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@elfarolab @BBCTech Maybe hydrogen is the answer?
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Wait longer for an electric taxi, says Uber boss bbc.in/3XYTQ6o
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@BBCTech The more I look at electric cars, the less attractive they seem. We are all trying to be more conscious of green issues, but electric cars aren’t quite there yet. I would like to use one, but there are so many disadvantages.
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@ElecNotes I think that in reality there is more, even if what you say is correct. One day the math formula will be reviewed.
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If the Free Space Path Loss Equations are Frequency Dependent Why do high Frequencies Still Work
From the equation and calculations for free space path loss, it would appear that it is inherently a poor decision to use higher frequencies. It poses the question whether there is an advantage to use lower frequencies.
This is an interesting question, and whilst the mathematics would seem to suggest that this is the case, it is necessary to look a little more closely at what is happening to the signals.
The frequency term in the equation results from the assumption of unity gain antennas at either end of the link. A larger antenna is required to obtain the same gain at a lower frequency, and as a result antennas at lower frequencies will be much larger.
A larger antenna will collect energy from a larger area and therefore the loss between the ends of the link will be less even though the actual loss of the signal travelling is the same.
Normally what happens with microwave and other very high frequency radio communications links is that the antennas for these higher frequencies can be made to have a higher gain within an acceptable space, and therefore the apparent higher losses at higher frequencies are not the issue that might be thought.

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@BrianRoemmele looks to me a Viktor Schauberger design.. definitely not Archimede
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