BROADBAND DIRECTIONAL COUPLER

摘要

A broadband directional coupler for measuring a power of an advancing or returning radio-frequency signal on a coaxial line (1) consists of a voltage divider comprising a first resistor (8), a second resistor (12) and a third resistor (18). The first connection (6) of the first resistor (8) is connected to an inner conductor (2) of the coaxial line (1), and the second connection (9) of the first resistor (8) and the first connection (11) of the second resistor (12) are connected to a measuring unit (39). The first connection (17) of the third resistor (18) is connected to an outer conductor (19) of the coaxial line (1) and to the second connection (15) of the second resistor (12). The second connection (20) of the third resistor (18) is connected to earth. The third resistor (18) is arranged annularly and concentrically with respect to the inner conductor (2) in a plane oriented orthogonally with respect to the inner conductor (2).