FIELD: radio engineering. SUBSTANCE: device has two phase four-terminal circuits 1 and 2 and amplitude four-terminal circuit 3. Phase four-terminal circuit 2 serves as input of filter. Output of phase four-terminal circuit 2 is connected to input of amplitude four-terminal circuit 3, which output is connected to input of phase four-terminal circuit 1. Output of phase four- terminal circuit 1 serves as output of filter. Phase and amplitude four-terminal circuits conforms to specified frequency conditions. EFFECT: independence of frequency characteristics and argument of normal gain and frequency response of argument of reflection factor from filter input for nominal load at output. 8 dwg
