Whip antenna

An antenna, typically used for wireless transmitters (beltpacks). The antenna is flexible, and the length is usually approximately a quarter of the wavelength of the transmitting frequency. (@ 600 MHz this is 300.000.000 (speed of radio waves)/600.000.000 (transmission frequency)/4(quarter wave length) = 0.125 m or 4.9 inches. Added to this is a smaller correction factor due to the speed of electromagnetic waves in metal, which is slightly lower than in air.