Is there a similar SDR, like the ADALM-PLUTO but AD9364 based, not AD9363 as ADALM-PLUTO SDR? The AD9363 325 to 3800Mhz coverage is insufficient for some applications. The AD9364 coverage 70 to 6000 Mhz is much better in this sense.
1. With the software change I mentioned Pluto can operate the AD9363 at these bandwidths. This is outside the datasheet spec though.
2. The balun is speced 10MHz-6GHz I believe, so you are not limited there. The schematics will give you the exact balun used.
3. Currently no. If you want to use the 9364 I would recommend the FMComms4.