The UHF connector was invented in the 1930’s by E. Clark Quackenbush of Amphenol for use in the radio broadcast industry. The plug version of the UHF connector is commonly referred
to as the PL-259 connector, which is its military part number designation.
UHF connectors have threaded coupling interfaces and are non-constant in impedance. Because of their non-constant impedance,UHF connectors are limited to frequencies of up to
about 300 MHz and are generally low cost connectors.
UHF connectors are used primarily in low frequency communication equipment such as CB radios and public address systems.