The problem is that “one meter” is much longer than the distance between the module and your antenna. Because the GPU and CPU of the Jetson can work in the gigahertz frequency, there’s likely to be a “fair bit” of emitted radiation in that band when you’re really close to the module.
When it comes to RF shielding, that’s part engineering, part science, and part black art. You can try things like encasing the module in a Faraday cage or foil cage (a fine-grained steel mesh will let airflow through, foil won’t) or a ground ring under the antenna or a low-resistance high-frequency tuned decoupling capacitor (or a few.) But, if it still becomes a problem, you likely need to find an engineer who specializes in RF interference mitigation and let them work on the specific layout you have.