RF MEMS switch loop 180 degree phase bit radiator circuit

摘要

A switched loop RF radiator circuit, comprising a radiator element, a circuit RF input/output (I/O) port, and a balun coupled between the radiator element and the I/O port. The balun includes a 180° switched loop circuit having two transmission line legs coupled to a balun transition to provide a selectable 180° phase shift, and a microelectromechanically machined (MEM) switch cirtuit. Many radiator circuits can be deployed in an electronically scanned antenna array.