In ADF system, Goniometer
- combines the signals from fixed loop antenna and sense antenna
- effectively simulates a rotating loop antenna
- alternately selects signals from loop antenna and sense antenna
Explanation
In a fixed-loop ADF the goniometer takes the signals from the crossed fixed loops and, through its rotor windings, reproduces electrically the effect of physically rotating a single loop antenna. This lets the receiver find the directional null without any moving aerial, effectively simulating a rotating loop to determine the bearing.
sasna asking:
goniometer is used with fixed loop antenna....???????
Community Comments (4)
D
dimky Posts: 514 25.08.2013 / 11:18
I'm not avionics expert but as I remember, in past, ADF loops antenna was rotating, but now, principle of rotating antenna is simulated by two non rotating loop antennas which are positioned perpendicular to each other.
S
sasna Posts: 20 26.08.2013 / 00:22
please do not guess...refer and confirm. two fixed loops in long and lat axis are connected to the field of goniometer, which are commonly used in ADF
D
dimky Posts: 514 26.08.2013 / 09:44
I don't guess, I just telling you what I remember from theory. You can take my word in mind or not. If you have another opinion about that question and can provide some proof for that, I will be happy to correct it.
J
Jordi Posts: 198 28.11.2022 / 18:42
its B Aircraft Radio Systems by James Powell page 46
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