Patent ID: 9190956
Filing Date: 2015-11-17
Classification: H03D

Abstract:
1. An electronic mixer for generating a mixed signal (IF) by mixing a local oscillator signal (LO) with a useful signal (RF) comprising: at least one field effect transistor which has at least one gate (G), at least one source (S), and at least one drain (D), a useful signal input for feeding in the useful signal with a useful frequency (V a local oscillator signal input for feeding in the local oscillator signal (LO), which is so designed that in operation the mixer receives the local oscillator signal (LO) whose local oscillator frequency (v a signal output at which the mixed signal (IF) is present in operation of the mixer, characterised in that, the mixer is so adapted that in operation of the mixer to generate at least one of a gate-source voltage (U receive the useful signal (RF) from the useful signal input, the mixer is so adapted that in operation of the mixer to generate a gate-source voltage (U the mixer is so adapted that in operation of the mixer, the drain (D), or the source (S), of the field effect transistor for generating a drain-source voltage receives the local oscillator signal (LO) from the local oscillator signal input, and wherein the mixer is so adapted that in operation of the mixer a phase shift of between 0° and 360° is introduced between the local oscillator signal (LO) received by the gate (G) of the field effect transistor and the local oscillator signal (LO) received by the drain (D) or the source (S) of the field effect transistor, wherein the mixer has a first splitter, a second splitter, a first phase-shifting element, a second phase-shifting element, a first combinator and a second combinator, wherein the first splitter is so adapted that in operation the mixer receives the useful signal (RF) from the useful signal input, and outputs the useful signal (RF) to the gate (G) and the drain (D) or the source (S), wherein the second splitter is so adapted that in operation of the mixer receives the local oscillator signal (LO) from the local oscillator signal input, and outputs the local oscillator signal (LO) to the gate (G) and the drain (D) or the source (S), wherein the first phase-shifting element is between the first splitter and the gate (G) of the field effect transistor, or between the first splitter and the drain (D) or the source (S) of the field effect transistor, and wherein the first phase-shifting element is so adapted that the first phase-shifting element introduces a phase shift between the useful signal (RF) received by the gate (G) of the field effect transistor and the useful signal (RF) received by the drain (D) or the source (S) of the field effect transistor, wherein the second phase-shifting element is between the second splitter and the gate (G) of the field effect transistor, or between the second splitter and the drain (D) or the source (S) of the field effect transistor, and wherein the second phase-shifting element is so adapted that the second phase-shifting element introduces a phase shift, between the local oscillator signal (LO) received by the gate (G) of the field effect transistor and the local oscillator signal (LO) received by the drain (D) or the source (S) of the field effect transistor, wherein the first combinator is so adapted that in operation of the mixer, the first combinator receives the useful signal (RF) from the first splitter and the local oscillator signal (LO) from the second splitter, and outputs the useful signal (RF) and the local oscillator signal (LO) to the drain (D), or the source, of the field effect transistor, wherein the second combinator is so adapted that, in operation the mixer, the second combinator receives the useful signal (RF) from the first splitter and the local oscillator signal (LO) from the second splitter and outputs the useful signal (RF) and the local oscillator signal (LO) to the gate (G) of the field effect transistor.