[time-nuts] GPS Antenna Voltage-Dropping

bg at lysator.liu.se bg at lysator.liu.se
Thu Sep 3 19:28:12 UTC 2009


Go buy an antenna splitter. That might even be cheaper than a bias-T. Its
also a good excuse to get more GPS receivers.

--

   Björn

>
> In a message dated 03/09/2009 18:46:34 GMT Daylight Time,
> warrensjmail-one at yahoo.com writes:
>
> Ummmmm  is right,
> One of us is missing something, I wonder which one, I think I  know.
> He has a good bypass cap across all that, The RF is not going to see  the
> diodes.
> ws
>
>
>
> ---------------
> Ye Gods, just thinking about this is painful, we're talking microwave
> frequencies here, low microwave admittedly but just the physical
> discontinuities are still going to be significant.
>
> Even without the diodes that inline cylindrical capacitor is likely to
> cause problems, it probably won't look too much like a capacitor anyway,
> and to
>  suggest the RF is not going to see the diodes is, to put it politely, the
> height of optimism.
> Although, having said that, it is possible it might not see them as it
> might all be reflected at the capacitor junction before it gets to the
> diodes:-)
>
> Sorry but what's really missing here seems to be a sensible appreciation
> of
>  microwave fundamentals, perhaps even RF fundamentals!
>
> regards
>
> Nigel
> GM8PZR




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