A phase shifting device is disclosed, comprising an input amplifier, a biasing circuit, a first output amplifier and a second output amplifier being variable-gain amplifiers, and a quadrature hybrid coupler. The input amplifier is connected to an input port of the coupler, the first output amplifier is connected to a through port of the coupler, the second output amplifier is connected to a coupled port (P3) of the coupler, and the biasing circuit is connected to an isolated port of the coupler. Further, the quadrature hybrid coupler is configured to receive, at the input port, an input ...