Here's a handy antenna lengths chart for radio amateurs.
Views expressed in this Amateur/Ham Radio project are those of the reporters and correspondents. Accessed on 08 January 2023, 0617 UTC.
Source: https://www.hamuniverse.com/hamantennalengths.html and N4UJW.
Content supplied by "https://www.hamuiverse.com."
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Russ Roberts (https://www.simplehamradioantennas.com).
| Ham Radio HF/VHF Antenna Lengths Chart in Feet | ||||||||
|---|---|---|---|---|---|---|---|---|
| Ham Band (Meters) | Frequency (Mhz) | 1/4 wave (Feet) | 1/2 wave Dipole (Feet) | 1 wave Loop (Feet) | ||||
| 160 | 1.800 | 130' 0'' | 260' 0'' | 558' 4'' | ||||
| 1.850 | 126' 6'' | 253' 0'' | 543' 3'' | |||||
| 1.900 | 123' 2'' | 246' 4'' | 528' 11'' | |||||
| 2.000 | 117' 0'' | 234' 0'' | 502' 6'' | |||||
| 80 | 3.500 | 66' 10'' | 133' 9'' | 287' 2'' | ||||
| 3.750 | 62' 5'' | 124' 10'' | 268' 0'' | |||||
| 3.900 | 60' 0'' | 120' 0'' | 257' 8'' | |||||
| 4.000 | 58' 6'' | 117' 0'' | 251' 3'' | |||||
| 60 Under new rules effective March 5, 2012 The maximum allowed power level WILL BE 100 Watts PEP (ERP) effective radiated power referenced to a dipole. If another type of antenna is used, the station licensee must maintain a record of either the antenna manufacturer?s data on the antenna gain or calculations of the antenna gain. | 5.330.5 | 43' 9'' | 87' 8'' | 188' 5'' | ||||
| 5.346.5 | 43' 7'' | 87' 5'' | 188' 0'' | |||||
| NEW 5.357 | --- | 87' 4" | --- | |||||
| 5.371.5 | 43' 5'' | 87' 1'' | 187' 1'' | |||||
| 5.403.5 | 43' 3'' | 86' 6'' | 186' 0'' | |||||
| 40 | 7.000 | 33' 5'' | 66' 10'' | 143' 7'' | ||||
| 7.150 | 32' 9'' | 65' 5'' | 140' 7'' | |||||
| 7.300 | 32' 1'' | 64' 1'' | 137' 8'' | |||||
| Ham Band (Meters) | Frequency (Mhz) | 1/4 wave (Feet) | 1/2 wave Dipole (Feet) | 1 wave Loop (Feet) | ||||
| 30 | 10.100 | 23' 2'' | 46' 4'' | 99' 6'' | ||||
| 10.150 | 23' 1'' | 46' 1'' | 99' 0'' | |||||
| 20 | 14.000 | 16' 9'' | 33' 5'' | 71' 9'' | ||||
| 14.150 | 16' 6'' | 33' 1'' | 71' 0'' | |||||
| 14.300 | 16' 4'' | 32' 9'' | 70' 3'' | |||||
| 14.350 | 16' 4'' | 32' 7'' | 70' 0'' | |||||
| 17 | 18.068 | 12' 11'' | 25' 11'' | 55' 7'' | ||||
| 18.168 | 12' 11'' | 25' 9'' | 55' 4'' | |||||
| 15 | 21.000 | 11' 2'' | 22' 3'' | 47' 10'' | ||||
| 21.200 | 11' 0'' | 22' 1'' | 47' 5'' | |||||
| 21.450 | 10' 11'' | 21' 10'' | 46' 10'' | |||||
| 12 | 24.890 | 9' 5'' | 18' 10'' | 40' 5'' | ||||
| 24.990 | 9' 4'' | 18' 9'' | 40' 3'' | |||||
| 10 | 28.000 | 8' 4'' | 16' 9'' | 35' 11'' | ||||
| 28.500 | 8' 3'' | 16' 5'' | 35' 3'' | |||||
| 29.700 | 7' 11'' | 15' 9'' | 33' 10'' | |||||
| Note: For 28.400Mhz use formulas below | ||||||||
| Ham Band (Meters) | Frequency (Mhz) | 1/4 wave (Feet) | 1/2 wave Dipole (Feet) | 1 wave Loop (Feet) | ||||
| 6 | 50.000 | 4' 8'' | 9' 4'' | 21' 1'' | ||||
| 54.000 | 4' 4'' | 8' 8'' | 18' 7'' | |||||
| 2 | 144.000 | 1' 8'' | 3' 3'' | 7' 0'' | ||||
| 148.000 | 1' 7'' | 3' 2'' | 6' 9'' | |||||
| Antenna length is based on the following formulas: | ||||||||
| 1/2 wave dipole (feet) = 468 / frequency in Mhz. (1/4 wave, use 234 / frequency in Mhz) | ||||||||
| Full wave loop (feet) = 1005 / frequency in Mhz | ||||||||
Cut total wire length slightly longer for connecting insulators/pruning as needed for lowest swr. | ||||||||
