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46dbi

BFG

Regular Member
This ebay find is probably just two plastic tubes with a bit of bent coathanger inside.

But their approach to specifications made me laugh. Apparently 2 antennae of 23dbi each, makes 46dbi. A bit like two 9 year old kids trying to buy booze because they're eighteen, surely? I confess I don't know for sure.

But I'm very sceptical they could even get 23dbi, especially as they seem to think it's ok to supply it with 10m of cable.


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Is this as bent as it sounds, or plausible?


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Not sure you can just add up dbi like that on a MIMO setup, but there's no way a single of those antennae can do 23 or 46 dbi. More like 3 dbi..

For example when I was trying to build an LTE antenna, I found that a good log-periodic 1m long one would max out at around 12 dbi and that'd be one heck of an antenna.

If you're after antennas, stick to Poynting or Panorama.. more expensive, but actual engineering went into them.

The loss on that 10m cable, assuming cheap high-loss 50ohm, will be spectacular compared to the real gain. I'd definitely not touch it.

Avoiding cable loss in fact is why I went with an outdoor router, 0% loss.
 
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Can we apply this to other things? Like car tyres. If a tyre is rated as safe for 100mph, can we enjoy that a set of 4 tyres will be safe at 400mph? :ROFLMAO:
 
I presume inside each"antenna"tube is basically a long bolt with a few copper discs with nuts holding them in place?
 
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