i will need and antenna to boost the reception of my cell
As orksecurity says, none of the passive devices actually do anything. You can get cel phone repeater antennas that are designed for large concrete buildings to boost the signal indoors - we're getting some installed in our hospital soon because we need cdma coverage for some radios.
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Websearch on "cell booster" finds a number of devices that claim to be able to do this. I have no idea how well any of them work; there's a lot of snake oil in this area, as well as some FCC regulations to worry about, so I'd look for one that has been reviewed positively by one of the major electronic magazines.