Renaissance Electronics has designed a 6 x 6 Programmable Delay Line (PDL)
Matrix that can be used to simulate phased array radar and antenna testing.
Each of the 6 inputs is connected to dividers, programmable attenuators (91/1
dB) and a programmable delay line (10 bit, 5 ps step, DC – 3 GHz) internally.
The amplitude and phase are controlled by custom software with custom defined
UDP protocols.

Click here for datasheet,
http://www.rec-usa.com/Data%20Sheets/20-2500mhzswitchmatrix18A4NAD.pdf