EV-RADAR-MMIC2 bandwidth limit to 250 MHz

The EV-RADAR-MMIC2 radar board looks attractive for evaluation, but the bandwidth at 250 MHz is rather limited compared to the other radar modules from Texas Instruments. What is attractive about this module is that you can attach external antennas for transmitting and receiving. Are there other modules from Analog Devices that can have external antennas attached which have wider bandwidths? Thank you, Neil