Recently we've seen that a new SDR from the Ukrainian company RigExpert has been released. The RX-only USB3.0 SDR is called 'FobosSDR' and it has a 100 kHz to 6 GHz tuning range, 50 MHz of bandwidth, and 14-bit resolution. Apart from a standard RF input, it also has two auxiliary input channels for coherent direct sampling and clock in and out ports.

In terms of software support, the FobosSDR supports HDSDR, and interestingly a very old version of SDR# (SDR# 1716) through a plugin. They also have a GNU Radio block.

The design is based on the LTC2143 ADC and uses a wideband RFFC5072 mixer on the front end which feeds into a MAX2830 transceiver chip.

RigExpert products are carried by a number of resellers across the world, but FobosSDR does not yet appear to be available from any that we checked. So far we have not seen any reviews or demonstrations of the product in action, but will update if we do.