wrote in
:

On Friday, December 14, 2012 5:37:50 AM UTC-7, Doug White wrote:

Geo wrote in
news
http://www.polarinstruments.com/support/cits/AP124.html

Highly unlikely in this case. Transmission line test structures
are through lines, not open ended stubs. I think it's an antenna
of some sort. Doug White

I'm the person who posted the picture, and I should have mentioned
that it's a PC motherboard, MSI brand, model Z68A-G43(G3). It has
no wireless built into it.

I once found an antenna inside a Panasonic-made CRT monitor,
around the flyback. It was 1-2 pieces of circuit board material,
each about 3" long and 1/2" wide. In the schematic, it was
connected to a flyback winding that went nowhere else. Apparently
the antenna put out a signal to counteract interference generated
by the flyback.
transformer.

It may also be a resonant line for an oscillator or a filter. An open
stub like that can be used to make a resonator for filtering or act as
the "tank" for an oscillator. I've used open stubs like that to kill
unwanted spurs in systems. It will look like a short circuit at the
quarter wave frequency.

Also, just because it doens't have wireless doesn't mean the board wasn't
laid out with that option.

Doug White