Re: How does this POTY antenna work??
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The pic shows a circular patch feed for 2.4GHz , similar to the POTY type .The N elbow feeds 2.4GHz RF to the patch element .
His site says he uses a 20W PA , so depending on the attenuation along the TX cable , he should put in a reasonable signal .
My system outputs 1.5W via a 5m run of LDF450 Heliax via an 80cm offset - that puts my signal at -5dB relative to the Beacons on QO100.
The SMA lead will connect a probe inside the round waveguide to the downconverter behind the assembly. An LNB is a downconverter , in this case a block + antenna .The N elbow plug will carry downconverted RF and DC to the shack end unit that will supply the required output RF for the radio in use.
What is interesting to see is the conical horn and rear choke flange (?) . I would be interested to know what interactions /pattern distortion occur on 2.4GHz .
Certainly the feed will be more efficient than open ended waveguide at 10GHz .
On Wed, 19 May 2021 at 10:32, Chris Wilson <chris@...> wrote: