Partron was a company that moved out of Samsung's mobile communications business in 2003. Mainly engaged in RF device development and manufacturing. Products include dielectric filter, duplexer, isolator (circulator), mobile lens module, surface mount crystal oscillator and patch antenna. In the past 10 years, its business has expanded from the mobile phone field to the base station and repeater station. Partron has a factory in Yantai, China, specializing in the manufacture of dielectric filters, duplexer, circulator (isolator) and other devices.