Band Overview
Amateur radio operators have access to many frequency bands scattered across the radio spectrum, from medium wave to millimeter wave. Each band has unique propagation characteristics, typical uses, and a distinct "personality." Understanding these differences is essential for choosing the right band for the activity you want to pursue.
How Bands Are Named
Amateur bands are traditionally named by their approximate wavelength. The relationship is straightforward:
Wavelength (meters) = 300 / Frequency (MHz)For example, the band centered around 14 MHz has a wavelength of about 20 meters, so it is called the "20-meter band."
HF Bands (High Frequency: 3-30 MHz)
HF bands are the heart of amateur radio for long-distance (DX) communication. Signals on these bands can travel thousands of kilometers by bouncing off the ionosphere (sky wave propagation). HF conditions vary with time of day, season, and the solar cycle.
160 Meters (1.8 - 2.0 MHz)
- Character: Known as the "top band" -- the lowest amateur HF allocation
- Propagation: Primarily ground wave during the day; sky wave at night, with best conditions in winter
- Typical uses: Nighttime DX, a favorite challenge band for experienced operators
- Challenges: Requires large antennas, high noise levels (especially from power lines and thunderstorms), limited allocations in some countries
- Power: Typically 100-1000 W needed for effective communication
80 Meters (3.5 - 4.0 MHz)
- Character: A workhorse band for regional and medium-distance communication
- Propagation: Reliable ground wave out to a few hundred km; good sky wave at night (500-3000+ km)
- Typical uses: Evening ragchewing (casual conversation), regional nets, digital modes
- Challenges: Noisy, especially in summer; bandwidth allocation varies by country and ITU region
- Modes: LSB voice, CW, digital
40 Meters (7.0 - 7.3 MHz)
- Character: One of the most popular and versatile HF bands
- Propagation: Excellent both day and night; daytime range is typically several hundred to about 1500 km; at night, worldwide DX is possible
- Typical uses: General-purpose communication, nets, contests, FT8, CW
- Challenges: Can be crowded, especially during contests; broadcast interference in some regions (ITU Region 1 and 3 have a narrower allocation of 7.0-7.2 MHz)
- Modes: LSB voice, CW, digital
30 Meters (10.1 - 10.15 MHz)
- Character: A narrow, CW-and-digital-only band (no voice allowed in most countries)
- Propagation: Excellent propagation characteristics, often open when other bands are not
- Typical uses: CW, FT8, WSPR (propagation beacons)
- Challenges: Very narrow allocation (only 50 kHz), shared with other services, power typically limited to 200 W
- Modes: CW, digital only
20 Meters (14.0 - 14.35 MHz)
- Character: The premier DX band -- the "king of HF"
- Propagation: Reliable daytime propagation worldwide during moderate to high solar activity; often open 24 hours during solar maximum
- Typical uses: Worldwide DX, contests, SSB ragchewing, digital modes
- Challenges: Can be closed at night during solar minimum
- Modes: USB voice, CW, digital
17 Meters (18.068 - 18.168 MHz)
- Character: A WARC band (not used for contests by convention), quieter than 20 meters
- Propagation: Similar to 20 meters but slightly more dependent on solar activity
- Typical uses: DX, relaxed ragchewing without contest interference
- Challenges: Narrow allocation (100 kHz)
- Modes: USB voice, CW, digital
15 Meters (21.0 - 21.45 MHz)
- Character: An outstanding DX band when solar conditions are favorable
- Propagation: Primarily a daytime band; opens well during moderate to high sunspot numbers; can support worldwide contacts
- Typical uses: DX, contests, SSB, CW
- Challenges: Largely dead during solar minimum
- Modes: USB voice, CW, digital
12 Meters (24.89 - 24.99 MHz)
- Character: Another WARC band (no contests), similar behavior to 15 meters
- Propagation: Good during high solar activity; sporadic E openings possible
- Typical uses: DX, casual contacts
- Challenges: Narrow allocation (100 kHz), heavily dependent on solar cycle
- Modes: USB voice, CW, digital
10 Meters (28.0 - 29.7 MHz)
- Character: The highest HF band, straddling the boundary between HF and VHF behavior
- Propagation: Highly variable -- can support incredible worldwide DX during solar maximum, yet be completely dead during solar minimum; sporadic E openings are common in summer
- Typical uses: DX, FM simplex and repeaters (29.5-29.7 MHz), beacons
- Challenges: Very quiet during low solar activity
- Modes: USB voice, FM, CW, digital
VHF Bands (Very High Frequency: 30-300 MHz)
VHF signals propagate primarily by line of sight, making these bands ideal for local and regional communication. However, occasional propagation enhancements can extend range dramatically.
6 Meters (50 - 54 MHz)
- Character: Known as the "magic band" because of its unpredictable and exciting propagation
- Propagation: Normally line of sight (50-100 km), but sporadic E can open it for DX contacts of 1000-2000+ km; tropospheric ducting and meteor scatter are also possible
- Typical uses: Local communication, DX during openings, meteor scatter, EME
- Challenges: Propagation is highly unpredictable; requires patience and monitoring
- Modes: USB voice, CW, FT8, FM (in some regions)
2 Meters (144 - 148 MHz)
- Character: The most popular VHF amateur band worldwide
- Propagation: Primarily line of sight; repeaters extend coverage significantly; occasional tropospheric ducting and sporadic E openings
- Typical uses: Local FM communication through repeaters, simplex, SSB/CW weak-signal work, satellite, APRS, digital voice (DMR, C4FM, D-STAR)
- Challenges: Line-of-sight limitation; antenna height is critical
- Equipment: Handheld transceivers (HTs), mobile radios, base station setups
1.25 Meters (222 - 225 MHz)
- Character: A US-specific band (not available in most other countries)
- Propagation: Similar to 2 meters but with slightly higher path loss
- Typical uses: Repeaters, simplex, less crowded than 2 meters
- Challenges: Limited equipment availability
UHF Bands (Ultra High Frequency: 300 MHz - 3 GHz)
70 Centimeters (430 - 440 MHz)
- Character: The second most popular amateur band after 2 meters
- Propagation: Line of sight; signals penetrate buildings better than 2 meters in some situations but are also more easily blocked by terrain
- Typical uses: Repeaters, simplex, satellite communication (uplink), ATV (amateur television), digital voice, APRS
- Challenges: Shared with other services in some countries (ISM devices, radar)
- Equipment: Widely available -- most dual-band HTs and mobile radios cover this band
23 Centimeters (1240 - 1300 MHz)
- Character: The entry point to microwave amateur radio
- Propagation: Line of sight with higher path loss; requires more antenna gain
- Typical uses: Satellite downlinks, ATV, point-to-point links, EME
- Challenges: Equipment is more specialized and expensive; shared with GPS and other services
Microwave Bands (Above 1 GHz)
Amateur radio allocations continue into the microwave spectrum at 2.4 GHz, 5.8 GHz, 10 GHz, 24 GHz, 47 GHz, 76 GHz, and beyond. These bands are used primarily for experimental and technical research, including:
- Point-to-point communication
- Moonbounce (EME)
- Rain scatter
- Amateur television (ATV)
- High-speed data links
Microwave operation requires specialized equipment (often homebrew) and high-gain antennas such as parabolic dishes or horn antennas.
Band Plans
Each band is organized by a band plan -- a voluntary agreement among operators about which modes and activities belong in which parts of the band. Band plans help avoid interference between incompatible modes (for example, CW stations and SSB stations operating on the same frequency).
A typical HF band plan divides the band into segments:
| Segment | Typical Use |
|---|---|
| Bottom of the band | CW (Morse code) |
| Lower-middle | Digital modes (FT8, RTTY, PSK31) |
| Upper portion | SSB voice |
| Beacon sub-band | Propagation beacons (listen only) |
Band plans vary by country and ITU region. Always check the band plan published by your national amateur radio organization.
Choosing the Right Band
| Goal | Recommended Bands |
|---|---|
| Local chat via repeater | 2 m (144 MHz), 70 cm (430 MHz) |
| Regional communication | 80 m (3.5 MHz), 40 m (7 MHz) |
| Worldwide DX | 20 m (14 MHz), 15 m (21 MHz), 10 m (28 MHz) |
| Digital modes (FT8) | 20 m, 40 m, 15 m, 6 m |
| Satellite operation | 2 m (uplink), 70 cm (downlink), or vice versa |
| Emergency communication | 2 m, 70 cm (local), 40 m, 80 m (regional) |
| Experimentation | 6 m (magic band), microwave bands |
Now that you understand the amateur bands, it's time to take the practical step. Read First Steps to learn how to get licensed, choose your first radio, and make your first contact.
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