A federal judge on Thursday shut down FilmOn X, a streaming service similar to Aereo that picks up broadcast signals on tiny antennas and delivers them to users via the Internet. The broadcast networks contend that the system infringes on their copyrighted content and have sued. Judge Rosemary Collyer ruled on Thursday that the broadcasters were likely to succeed in their lawsuit and shut down the service in all states except those covered by the Second Circuit Court of Appeals in the Northeast, which ruled against the broadcasters in their claim against the Aereo service. Her ruling prevents FilmOn X from operating until a trial of the broadcasters' lawsuit against it concludes. The ruling would appear not only to stymie FilmOn X but also Aereo, which has announced plans to expand its service throughout the country by the end of the year.