There's a bunch of them out there, at different prices. E.g.:
EURECOM's ExpressMIMO2 PCIe card requiring a PC with a free 8/16-way PCIe
slot. With an appropriate adaptor the card can function in a 1-way PCIe slot
or ExpressCard slot in a laptop.
NI/Ettus USRP B200/B210 USB3 radio card requring a PC with a free USB3 port. Plus the NXXX series radios (bit more powerful)
BladeRF over USB3 port.
LimeSDR over USB3 port.
Biting the hand that feeds IT
