Randolph,
Reversing Your point of view:
How would You protect US tanks from drone's attack ?
That's a really great question. If we look at current US doctrine (our doctrine always tends to focus on how to fight the last war instead of the next) there would first be the establishment of "Air Superiority" before any ground assets like tanks and troops would be employed. So, depending on how well that part of the "puzzle" goes together then there should not be a need to worry about enemy drone or air attack - hoffentlich.
Or:
Don't You thing that UAVs without satelite communication are useless ?
Although that is probably the weakest link there are quite literally hundreds of these missions being run every single day using that form of command and control and I hear of almost zero problems with it. So no, I am not worried about that aspect nor do I think it is useless.
Didn't Chinease prove already that thay can shot down any satellite ?
I am not aware of China having this capability nor would I be too worried about it if it actually existed as China's success rate with that level of technology has been quite low.