It a business card with a printed yagi antenna on it, it
have a miniature conductive magnet positioned 3/4th of
For radios with a stiff metal antenna, you simply
the card's magnet to it, and (hopefully with the right
design) point the antenna to a weak radio station.
you have a mp3 player, you attach a special pass
headphone jack, and attach the other alligator clip to the
mini antenna. Now you can point it to the weak station.
Other ideas for biz card directional attenna.
- Make a design for receiving wifi signals, if you cannot
receive a station, and need to access it in a pinch. Then
take the card out, and pull out its short stiff thin
copper wire, with a tiny rectangular sheet with two
and a dent between it.
To hook this flat connector, you bend the tiny
sheet so that the sheet looks like this
where "_/\" is the bended sheet that have a hole in it,
the "----=" is the reverse SMA connector pin.
Line the two hole towards the pin, and shove it in.
the mini directional antenna, and you are done.
Does this work? If you are a radio engineer, give this a
Make a card that you can temporary attach (via magnet
adhesive) to any phone and increase its reception via
induction(Since most phones do not have an external
antenna attachment). Would come in handy in an
Note: Must fit in a wallet
make a solar powered business card, electromagnetic
detector. It clicks every time you point it to a high
interference area. (like a giger counter)