Abstract: A balanced amplifier includes a bypass branch (19), termination elements (TE1, TE2) and an amplifying section (10). The section (10) includes amplifiers (A1, A2), first coupling/splitting unit (14) having a first input signal receiving port (14a), a second port (14b) connected to a termination element (TE1), a third port (14c) connected to a first amplifier (A1), and a fourth port (14d) connected to a second amplifier (A2). The section (10) also includes second coupling/splitting unit (16) having a first port (16a) connected to first amplifier (A1), a second port (16b) connected to second amplifier (A2) and a third port (16c) connected to a termination element (TE2). The second coupling/splitting unit (16) combines signals from amplifiers (A1, A2) as output signals on a fourth port (16d) for supply to a signal output (O). The branch (18) is connected to the second port (14b) of the first coupling/splitting unit (14) and provides bypass signals to output (O).

Abstract: A balanced amplifier includes a bypass branch (19), termination elements (TE1, TE2) and an amplifying section (10). The section (10) includes amplifiers (A1, A2), first coupling/splitting unit (14) having a first input signal receiving port (14a), a second port (14b) connected to a termination element (TE1), a third port (14c) connected to a first amplifier (A1), and a fourth port (14d) connected to a second amplifier (A2). The section (10) also includes second coupling/splitting unit (16) having a first port (16a) connected to first amplifier (A1), a second port (16b) connected to second amplifier (A2) and a third port (16c) connected to a termination element (TE2). The second coupling/splitting unit (16) combines signals from amplifiers (A1, A2) as output signals on a fourth port (16d) for supply to a signal output (O). The branch (18) is connected to the second port (14b) of the first coupling/splitting unit (14) and provides bypass signals to output (O).

Abstract: A directional coupler for radio frequency application, comprising: an input (110) for receiving a radio frequency input signal; a port (120) for delivering a radio frequency output signal; a first elongated conductor (150; 150:1), suspended in air between two ground planes, for connecting the input (110) with the port (120); the first conductor (150) comprising a sandwich structure with a first upper conductive strip (150A), a first intermediate layer comprising a dielectric material and a first lower conductive strip (150B); a second elongated conductor (200; 200:1), suspended in air between two ground planes, the second elongated conductor (200:1) comprising a sandwich structure with a second upper conductive strip (200:1A), a second intermediate layer comprising a dielectric material and a second lower conductive strip (200:1B); said first elongated conductor (150; 150:1) and said second elongated conductor (200; 200:1) being substantially parallel; said first upper and lower conductive strips and said sec

Abstract: A directional coupler for radio frequency application, comprising: an input (110) for receiving a radio frequency input signal; a port (120) for delivering a radio frequency output signal; a first elongated conductor (150; 150:1), suspended in air between two ground planes, for connecting the input (110) with the port (120); the first conductor (150) comprising a sandwich structure with a first upper conductive strip (150A), a first intermediate layer comprising a dielectric material and a first lower conductive strip (150B); a second elongated conductor (200; 200:1), suspended in air between two ground planes, the second elongated conductor (200:1) comprising a sandwich structure with a second upper conductive strip (200:1A), a second intermediate layer comprising a dielectric material and a second lower conductive strip (200:1B); said first elongated conductor (150; 150:1) and said second elongated conductor (200; 200:1) being substantially parallel; said first upper and lower conductive strips and said sec