How do I apply for an FCC experimental license to test a new RF device or system?

An FCC experimental license (Part 5) allows individuals and organizations to operate RF equipment that is not yet certified or authorized, for purposes of research, development, and testing: (1) When needed: you are developing a new RF product that has not yet received FCC equipment authorization (Part 15, 90, 95, etc.). You want to test RF equipment at frequencies or power levels beyond what your current authorization allows. You are conducting radio propagation studies or spectrum research. You are testing prototype radar, satellite, or communication systems before commercial deployment. (2) Application process: file FCC Form 442 (Application for New or Modified Radio Station Authorization Under Part 5): electronically through the FCC OET (Office of Engineering & Technology) online filing system. Required information: applicant name and contact, transmission frequencies (specific frequencies or frequency bands), bandwidth and modulation type, maximum transmit power (EIRP), antenna type and height, location of operation (fixed location or area of operation), duration of the experiment (up to 2 years, renewable), and a description of the experiment (the purpose, what is being tested, expected RF emissions). (3) License types: conventional experimental license: for specific frequencies, locations, and time periods. Most common for prototype testing. Program experimental license: a broader authorization for organizations with ongoing R&D programs (available to universities, research institutions, and companies with established RF engineering capabilities). Covers a range of frequencies and locations without specifying each individual experiment. Medical experimental license: for testing medical devices that use RF energy. (4) Requirements: the experimental operation must not cause harmful interference to licensed services. If interference occurs: the experimental operation must cease immediately. The license holder must keep records of all experimental operations (dates, times, frequencies, power levels). The license holder must comply with RF safety requirements (MPE limits). (5) Timeline: typical processing time: 30-60 days from filing to grant. Simple requests (low power, isolated location): may be processed in 2-3 weeks. Complex requests (high power, near airports or military installations): may take 60-90 days (requires coordination with other agencies).