antenna switch
 

Hi,

This is a variant on a question I asked a couple days ago. Again I'm
not the most hardware knowledgable so apologies in advance.

I have two WiFi (802.11b here) routers that I'm using to conduct some
experiments. They will be co-located (~half wavelength spacing) and
sending broadcast packets in a continuous loop over the duration of the
experiment. I originally wanted to disable carrier sense on the
routers so that they could transmit packets simultaneously. Given the
difficulty I've had trying to achieve this as an alternative I would
like to use some sort of timed switching device. Essentially I would
like this device to on each clock cycle short one of the routers to its
respective antenna and open circuit the other router from its antenna
and ground its output, and then on the next cycle do the opposite. I'd
like a clock period of about 2 msec. The idea then would be that the
routers would not block one another from transmitting.

One might ask why not just let them both transmit without this
switching device, in theory the carrier sense should allow equal
channel use, but I've observed that its not as evenly distrubuted over
time intervals as I would like for my experiments. Thanks for any
suggestions on this device,

Kev

antenna switch
 

look up solid state RF switch and you will see things like this:
http://www.teledynerelays.com/


wrote in message
ups.com...
Hi,

This is a variant on a question I asked a couple days ago. Again I'm
not the most hardware knowledgable so apologies in advance.

I have two WiFi (802.11b here) routers that I'm using to conduct some
experiments. They will be co-located (~half wavelength spacing) and
sending broadcast packets in a continuous loop over the duration of the
experiment. I originally wanted to disable carrier sense on the
routers so that they could transmit packets simultaneously. Given the
difficulty I've had trying to achieve this as an alternative I would
like to use some sort of timed switching device. Essentially I would
like this device to on each clock cycle short one of the routers to its
respective antenna and open circuit the other router from its antenna
and ground its output, and then on the next cycle do the opposite. I'd
like a clock period of about 2 msec. The idea then would be that the
routers would not block one another from transmitting.

One might ask why not just let them both transmit without this
switching device, in theory the carrier sense should allow equal
channel use, but I've observed that its not as evenly distrubuted over
time intervals as I would like for my experiments. Thanks for any
suggestions on this device,

Kev

antenna switch
 

In article . com,
wrote:

Hi,

This is a variant on a question I asked a couple days ago. Again I'm
not the most hardware knowledgable so apologies in advance.

I have two WiFi (802.11b here) routers that I'm using to conduct some
experiments. They will be co-located (~half wavelength spacing) and
sending broadcast packets in a continuous loop over the duration of the
experiment. I originally wanted to disable carrier sense on the
routers so that they could transmit packets simultaneously. Given the
difficulty I've had trying to achieve this as an alternative I would
like to use some sort of timed switching device. Essentially I would
like this device to on each clock cycle short one of the routers to its
respective antenna and open circuit the other router from its antenna
and ground its output, and then on the next cycle do the opposite. I'd
like a clock period of about 2 msec. The idea then would be that the
routers would not block one another from transmitting.

One might ask why not just let them both transmit without this
switching device, in theory the carrier sense should allow equal
channel use, but I've observed that its not as evenly distrubuted over
time intervals as I would like for my experiments. Thanks for any
suggestions on this device,

Kev


Pin diodes at the end of a 1/4 wave Stub.......