TL;DR: The antagonists in my story have made nearly unstoppable soldiers who, through nanites embedded in their brains, are able to experience the future and send memories back in time. Since the time machine in my story is the size of a small particle collider, these memories are transmitted through radio to the single time machine station, sent back in time and then redownloaded in the soldier's past mind. My protagonists, now having to fight these guys, are faced with a problem: Is it possible to make weapons or traps to shield the RF frequencies that pre-cog soldiers use to send their memories back in time? If so, what would these weapons be like?
This question takes place in the same setting as the post I detailed in “What limitations can I put on wings for more tense/risky action scenes?” and deals more with the antagonists’ creation: nanites. The rogue research group I mentioned has “developed” these nanites that are capable of changing a human into... something else. Keep in mind that these nanites are essentially handwaved except for basic laws of physics, since their design and origin are not from this time or even the near future of the story, and they’d be essentially impossible with today’s technology.
In the case of the main protagonist, the nanites were used to change him into an Arronian as a test (see the post). In the case of the research group’s main goal, they use the nanites to change subjects into similar creatures that are tentatively named SHARDs (name ideas anyone?). SHARDs are a modified (the research group would say “perfected”) version of the natural Arronian, with biological and nanite based additions to make them, let’s say, very lethal. They are wingless—unlike Arronians—and their skeleton has been completely replaced by nanites for extra strength, and to allow them to shift from human to SHARD relatively quickly. The nanites have also fused with their minds, connecting the nanites' individual AGI to the previously human host, as well as to a limited hive-mind of sorts.
The important feature of the SHARDs for this question is that the nanites enable them to be precognitive; as a result, single soldiers are almost completely unstoppable. The pre-cognition works like this: all of their feathers have lost their barbs and are basically hollow, quill-like shafts. These shafts are filled with nanite-built structures that act as long-range RF antennas. The antennas connect the SHARD’s mind through satellite to a single large warehouse complex with a machine that can send messages (encoded in streams of particles) back in time. Again, this machine is handwaved because it’s tech from the far future. If a SHARD dies, is injured, or voluntarily sends something back, the nanites will broadcast the last few minutes of the SHARD’s memories (recorded by the AGI) to the machine, and then download them back onto the SHARD, a few minutes back in time. The SHARD has now experienced the future and now can correct its mistakes accordingly. If you’ve watched Edge of Tomorrow, it’s just like that.
So this presents a real problem for my protagonists: how do you kill a pre-cog? In addition to the tactics posted in numerous questions on Stack Exchange about this, I’m thinking that the main weakness here is that the time-travel component is centralized, and connected through RF. If a SHARD can’t send its memories back to the machine, then it loses its precognition. They can then be dealt with like any other nanite enhanced shape-shifting assassin.
Now after all that, here’s my original question: is it practical to make Faraday cage/RF shielding weapons or traps, and if so, what would they be like? Tactically, what kind of device would work best against the SHARDs? Could you quickly place RF shielding mats or fabric in rooms to trap SHARDs? Are grenades that spray out webs of reinforced copper micro-wires/lattices practical? Is it possible to make a device that could destructively interfere with or even just flood their radio frequencies with noise so the signals never reach the machine? Just a reminder, the level of technology is in the near future, about the 2030s, so nanotechnology should have progressed quite a bit.
I’m not experienced with EM shielding and the physics behind Faraday cages past the Wikipedia page, so if this is completely impossible or impractical let me know; I’m here to learn.