A phase shifter, comprising: a signal input; a signal output; an electrostatic discharge protection circuit comprising a first two port device (110_1) and a second two port device (110_2), each two port device being switchable between a high impedance state and a low impedance state; a first signal path (108_1) between the signal input and the signal output, wherein the first signal path (108_1) comprises the first two port device (110_1) of the electrostatic discharge protection circuit and a first delay line (112_1) configured to provide a first phase shift to a signal transmitted from the signal input to the signal output via the first signal path (108_1); and a second signal path (108_2) between the signal input and the signal output, wherein the second signal path (108_2) comprises the second two port device (110_2) of the electrostatic discharge protection circuit and a second delay line (112_2) configured to provide a second phase shift, different from the first phase shift, to the signal transmitted from the signal input to the signal output via the second signal path (108_2); wherein the electrostatic discharge protection circuit is a circuit that is conventionally used for protecting electrostatic discharge sensitive electronic circuits from an electrostatic discharge; and wherein the first two port device (110_1) and the second two port device (110_2) are capable of non-destructively discharging electrostatic discharge voltages or electrostatic discharge currents in an electrostatic discharge event; wherein each of the two port devices (110_1,110_2) of the electrostatic discharge protection circuit is implemented - by means of two reverse connected diodes; - or by means of a uni-directional high-speed diode adapted to be operated in a reverse breakdown operation mode in the low impedance state. a signal input; a signal output; an electrostatic discharge protection circuit comprising a first two port device (110_1) and a second two port device (110_2), each two port device being switchable between a high impedance state and a low impedance state; a first signal path (108_1) between the signal input and the signal output, wherein the first signal path (108_1) comprises the first two port device (110_1) of the electrostatic discharge protection circuit and a first delay line (112_1) configured to provide a first phase shift to a signal transmitted from the signal input to the signal output via the first signal path (108_1); and a second signal path (108_2) between the signal input and the signal output, wherein the second signal path (108_2) comprises the second two port device (110_2) of the electrostatic discharge protection circuit and a second delay line (112_2) configured to provide a second phase shift, different from the first phase shift, to the signal transmitted from the signal input to the signal output via the second signal path (108_2); wherein the electrostatic discharge protection circuit is a circuit that is conventionally used for protecting electrostatic discharge sensitive electronic circuits from an electrostatic discharge; and wherein the first two port device (110_1) and the second two port device (110_2) are capable of non-destructively discharging electrostatic discharge voltages or electrostatic discharge currents in an electrostatic discharge event; wherein each of the two port devices (110_1,110_2) of the electrostatic discharge protection circuit is implemented - by means of two reverse connected diodes; - or by means of a uni-directional high-speed diode adapted to be operated in a reverse breakdown operation mode in the low impedance state. - by means of two reverse connected diodes; - or by means of a uni-directional high-speed diode adapted to be operated in a reverse breakdown operation mode in the low impedance state.