Antenna Switch

[fiskie]

I have a Sirius receiver at work, which is in a brick building. The one window to my office has a narrow area of reception, so I added another antenna to a window in another office, connecting with an extension cable. One of the two antennas always receives a signal, but neither receives all of the time. So, I have to plug and unplug them as the satellites move. Is there an antenna switch that uses the peculiar connectors used by Sirius? Does anyone know the connector type?