∏-Box antenna

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Material

∏-Box Antenna Ready to Broadcast
  • One Coaxial T

CoaxTbis.jpg

  • One Coaxial female adaptor

CoaxFabis.jpg

  • 2 Coaxial Telescopic Antennas

CoaxAntbis.jpg

  • Coaxial RG 174 wire

Wirebis.jpg

  • 1 GPIO Jumper (needs only 2 slots)

JumperGPIO.jpg


Other Needs

  • soldering station
  • tape


Tutorial

First, prepare the Wire, connect the wire to the coaxial female adaptator.

TTEr2.jpg

TTEr5.jpg

Connect the wire to the GPIO Jumper.

TTEr4.jpg

Add some tape.

TTEr3.jpg

The wire is ready, now let's make the antenna

open the coaxial T, take off the balloon, disconnect one output, break the cover of the side coaxial output.

OpenTBis.jpg

cover it back with tape, open slightly the male plug so it can host one telescopic antenna then connect the wire.

GPIOs.png

last, connect the Antenna to the Rasperri Pi on GPIO 4 (ports 7) & GROUND (ports 9)

Antennafinish.jpg

Ready for transmission !

AntennaRady.jpg


Measure

DipoleAlu.jpg

Test transmission with pi-box + dipole antenna made with rigid aluminium tube

Dipolecuivrecable.jpg

Test transmission with pi-box + dipole antenna made with flexible copper cable

SansAntenne.jpg

Test transmission with pi-box without antenna

Velo.jpg

Test transmission with transmitter 5 watts (?) with an antenna fixed to a bike (a bike as antenna)

Theorical ressources

Understand and measure antennas

Technical ressources

Pre built antennas