magicfoot
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In the following link a booster antenna is attached to a 3G dongle. How is the coupling achieved by the pad that is taped on to the dongle ?
What sort of material is this coupling pad and how is it wired to the antenna cable ? I would have expected this to be at least 4 times as long for a the frequency range aroundd 1.9GHz . Is this achieved via some sort of coiled loop in the pad ? The pad material itself looks like some sort of dielectric gel.
https://www.youtube.com/watch?v=aC-d_6T03kc
How efficient is this coupling ?
I am intrigued that this works at all from the EM aspect.
What sort of material is this coupling pad and how is it wired to the antenna cable ? I would have expected this to be at least 4 times as long for a the frequency range aroundd 1.9GHz . Is this achieved via some sort of coiled loop in the pad ? The pad material itself looks like some sort of dielectric gel.
https://www.youtube.com/watch?v=aC-d_6T03kc
How efficient is this coupling ?
I am intrigued that this works at all from the EM aspect.