What rules apply to amateur radio antennas?
In the US, amateur stations operate under 47 CFR Part 97, which sets maximum transmitter power (1,500 W PEP output in most bands), requires licensees to evaluate RF exposure for their station and antennas, and addresses antenna structures, including FAA-related notification for tall structures and the limited federal preemption of local regulations.[1][2]
What does Part 97 say about power?
The general limit is 1,500 W peak envelope power output, with lower limits on certain bands and for some license classes, and the requirement to use the minimum power necessary to carry out the desired communications.[1]
What about RF exposure?
Amateur licensees must ensure their stations comply with the FCC exposure limits of 47 CFR 1.1310, considering antenna gain, height, power, duty cycle and distance to people, using methods such as those in OET Bulletin 65.[1][3]
Are antenna structures regulated?
Part 97 addresses antenna structures that may affect air navigation (tall structures and those near airports require further review) and states that local regulations must reasonably accommodate amateur communications. Local zoning, building codes and private covenants still apply in many situations.[1]
Frequently asked questions
Do I need a license to transmit on amateur bands?
Yes; transmitting requires an amateur license.
Can I build my own antennas?
Yes; homebuilt antennas are permitted and common.
Where are the band edges?
In 47 CFR 97.301 and related sections, varying by license class.
See also
References
Online sources accessed October 21, 2026; printed works cited by edition. See all sources.
- “47 CFR Part 97 — Amateur Radio Service”. U.S. FCC, eCFR. current text.
- “47 CFR 1.1310 — Radiofrequency radiation exposure limits”. U.S. FCC, eCFR. current text.
- “OET Bulletin 65, Edition 97-01: Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields”. U.S. FCC Office of Engineering and Technology. August 1997.