documentation:π-box_-_how_to_build_an_antenna
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| - | ===== Material ===== | ||
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| - | {{ : | ||
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| - | ∏-Box Antenna Ready to Broadcast | ||
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| - | * 2 Coaxial Telescopic Antennas {{ : | ||
| - | * Coaxial RG 174 wire {{ : | ||
| - | * 1 GPIO Jumper (needs only 2 slots) {{ : | ||
| - | |||
| - | ===== Other Needs ===== | ||
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| - | * soldering station | ||
| - | * tape | ||
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| - | ===== Tutorial ===== | ||
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| - | First, prepare the Wire, connect the wire to the coaxial female adaptator. | ||
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| - | {{ : | ||
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| - | Connect the wire to the GPIO Jumper. | ||
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| - | {{ : | ||
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| - | Add some tape. | ||
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| - | {{ : | ||
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| - | The wire is ready, now let's make the antenna | ||
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| - | open the coaxial T, take off the balloon, disconnect one output, break the cover of the side coaxial output. | ||
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| - | {{ : | ||
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| - | cover it back with tape, open slightly the male plug so it can host one telescopic antenna then connect the wire. | ||
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| - | {{ : | ||
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| - | last, connect the Antenna to the Rasperri Pi on GPIO 4 (ports 7) & GROUND (ports 9) | ||
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| - | Ready for transmission ! | ||
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| - | {{ : | ||
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| - | ===== Measure ===== | ||
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| - | {{ : | ||
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| - | Test transmission with pi-box + dipole antenna made with rigid aluminium tube | ||
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| - | Test transmission with pi-box + dipole antenna made with flexible copper cable | ||
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| - | Test transmission with pi-box without antenna | ||
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| - | Test transmission with transmitter 5 watts (?) with an antenna fixed to a bike (a bike as antenna) | ||
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| - | ===== Theorical ressources ===== | ||
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| - | ==== Understand and measure antennas ==== | ||
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| - | * http:// | ||
| - | * http:// | ||
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| - | ==== Technical ressources ==== | ||
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| - | * Simple dipole antenna by Tetsuo Kogawa https:// | ||
| - | * Antenne dipole http:// | ||
| - | * Antennas types and calculs http:// | ||
| - | * How to calculate the lenght of a 1/4 wave or 1/2 wave antenne ? http:// | ||
| - | * Basics of the antennas [[BAsicsOnAntennas-an-00500.pdf|BAsicsOnAntennas-an-00500.pdf]] | ||
| - | * Build a low tech antenna with agricultural material https:// | ||
| - | * [https:// | ||
| - | * more expensive https:// | ||
| - | * pro [http:// | ||
documentation/π-box_-_how_to_build_an_antenna.1694090631.txt.gz · Last modified: 2023/09/07 14:43 by jbb