Reddit reviews Cell Phone Antenna - External Passive Repeater Antenna
We found 2 Reddit comments about Cell Phone Antenna - External Passive Repeater Antenna. Here are the top ones, ranked by their Reddit score.
Reduces dropped calls and static noiseStabilize and Enhances your cell phone receptionGain up to 3DB in signal
Haven't seen one quite like that, but reminds me of a passive through window cell antenna, like this:
https://www.amazon.com/Cell-Phone-Antenna-External-Repeater/dp/B0053WE8VM
Well yeah something like this, which is pretty much a monopole - coax - dipole setup: https://www.amazon.com/Cell-Phone-Antenna-External-Repeater/dp/B0053WE8VM
The car does to some degree act as a Faraday cage, so the monopole is placed outside, transmitting the incident waves through the the coaxial cable to the dipole on the inside, which emits the electromagnetic waves for the phone to sense. It of course also works the other way around, with the phone transmitting.
Again, you don't see the passive models very often, as they just aren't that good.
Edit: I just noticed there isn't a coax connecting the two antennas! They must rely on some coupling instead, which I can't imagine working very well