Receiving antenna building » History » Version 4
SCHNEIDER, Joris, 03/23/2017 10:14 PM
| 1 | 1 | SCHNEIDER, Joris | h1. Receiving antenna building |
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| 2 | 1 | SCHNEIDER, Joris | |
| 3 | 1 | SCHNEIDER, Joris | h2. List of components |
| 4 | 1 | SCHNEIDER, Joris | |
| 5 | 1 | SCHNEIDER, Joris | h2. Assembly |
| 6 | 1 | SCHNEIDER, Joris | |
| 7 | 1 | SCHNEIDER, Joris | h2. Testing and validation |
| 8 | 2 | SCHNEIDER, Joris | |
| 9 | 4 | SCHNEIDER, Joris | In order to ensure the fact that the antenna is functioning well, we made several tests. |
| 10 | 4 | SCHNEIDER, Joris | |
| 11 | 4 | SCHNEIDER, Joris | At first, we had to ensure that the cables will really bring the phase shift of a Pi/2 between opposite dipoles. To do so, we plugged in the cables to a signal generator. We generated a sine signal at 137MHz and observed on an oscilloscope the signal at the output of two cables which have a different length as explained in the design part. Here you can find pictures of the signal generator and the observed signal at the ouput. |
| 12 | 4 | SCHNEIDER, Joris | |
| 13 | 1 | SCHNEIDER, Joris | p=. |
| 14 | 4 | SCHNEIDER, Joris | !{width:60%}PhaseShift2.jpg! |
| 15 | 4 | SCHNEIDER, Joris | !{width:60%}PhaseShift.jpg! |
| 16 | 4 | SCHNEIDER, Joris | |
| 17 | 4 | SCHNEIDER, Joris | We see that the phase shift between the two cables is about Pi/2. |
| 18 | 4 | SCHNEIDER, Joris | |
| 19 | 4 | SCHNEIDER, Joris | Then, at each step during the assembly, we tested each connection with a multimeter in order to ensure that all connections are correctly done. |
| 20 | 4 | SCHNEIDER, Joris | |
| 21 | 4 | SCHNEIDER, Joris | Once all this test were done, the antenna was put on the roof in order to be able to get APT signals. |