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Radar A method, system, or technique of using beamed, reflected, and timed radio waves for detecting, locating, or tracking objects. - The frequency bands used by radar (radar frequency bands) were first designated by letters for military secrecy. These are shown in the following table.
| Frequency Band | Frequency Range x109Hz | Wavelength Range cm | | P-band | 0.225 to 0.39 | 140 to 76.9 | | L-band | 0.39 to 1.55 | 76.9 to 19.3 | | S-band | 1.55 to 5.20 | 19.3 to 5.77 | | X-band | 5.20 to 10.90 | 5.77 to 2.75 | | K-band | 10.90 to 36.00 | 2.75 to 0.834 | | Q-band | 36.00 to 46.00 | 0.834 to 0.652 | | V-band | 46.00 to 56.00 | 0.652 to 0.536 |
 
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