If you live in an area with intermittent GSM cell phone coverage, and your phone has an external jack, an antenna may improve your reception. GSM is a mobile communications technology that converts voice conversation into digital data, and transmits this data between phones via cellular transmission towers. A homemade GSM antenna can boost the signal strength between your phone and distant cell towers.
- Skill level:
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Things you need
- Copper wire, 9-gauge with the insulation removed, 80mm long
- Circuit board, blank, one-sided, copper-clad, 200mm square
- N-type connector, male, screw-on with solder tab
- Pigtail cable, low-loss, with female N-type connector and GSM antenna connector
- Soldering iron and solder
- Power drill with various bits
- Metric ruler
- Metal file
- Wire-cutting tool
File an end of the copper wire until it fits snugly in the N connector solder tab. Solder the wire to the N connector.
Measure and mark 77.5mm from the base of the N connector solder tab to the tip of the wire. Cut the wire a few millimetres longer, and then file the wire down to the marked length.
Find the centre of the circuit board by drawing diagonals from the corners, on the bottom side of the board. Drill a small hole in the centre of the board. Gradually widen the hole with larger bits until the N connector fits. Mount the N connector to the copper side of the board, with the copper wire facing up.
Connect the antenna to the receiver using the pigtail cable.
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