[time-nuts] Difference in GPS antennas

[WB6BNQ]

Hi Hal,

Can you take some photographs ?  It would be intersting to see it.  It sounds
like some dipoles with phasing lines under them possibly.

thanks,

Bill....WB6BNQ


Hal Murray wrote:

> > My Panasonic VIC100 antenna had a few screws to hold the bottom to the
> > plastic cone top.  The bottom had an o-ring seal that stuck a little
> > but was still pretty easy to slide the bottom from the top half.
> > Inside was a patch antenna on top of a pcb.
>
> Thanks.  I tried again and it came apart easily.  There is an O-ring but no
> glue.  (I wonder why I didn't get it the first try.)
>
> The antenna isn't a patch.  (Or I don't recognize it as such.)
>
> It's a cylinder, 2 inches tall, 3/4 inch in dia, sticking up over a 2 inch
> square PCB that's screwed into an aluminum base place.
>
> It's made of flexible PCB material wrapped around to make a cylinder.  The
> outside bottom 3/4 inch is a plane.  There is an obvious solder joint line
> closing the plane.  The inside top has 4 fingers spiraling around at 45
> degrees.  The lower inside part (opposite the plane) has some wiggles in some
> traces, but I haven't figured out the equivalent circuit.
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
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