Circuit layout and method for frequency-dependent matching of a high-frequency amplifier stage

1. A circuit, comprising:

a high-frequency amplifier stage, which includes a high-frequency amplifier with an input and an output, wherein the output of the high-frequency amplifier is coupled to a total high-frequency path carrying a total frequency band;

a first partial frequency path coupled to the total high-frequency path, wherein the first partial frequency path includes

a first pass filter configured to pass a first partial frequency band,

a first matching network coupled to the first pass filter, wherein the first matching network is configured to match the high-frequency amplifier stage in the first partial frequency band, and

a further first pass filter coupled to the first matching network, wherein the further first pass filter is configured to pass the first partial frequency band;

a second partial frequency path coupled to the total high-frequency path, wherein the second partial frequency path includes

a second pass filter configured to pass a second partial frequency band,

a second matching network coupled to the second pass filter, wherein the second matching network is configured to match the high-frequency amplifier stage in the second partial frequency band, and

a further second pass filter coupled to the second matching network, wherein the further second pass filter is configured to pass the second partial frequency band; and

a coupling to an output of the first and second partial frequency paths, wherein the coupling combines an output of the first and second partial frequency paths into the total high-frequency path,

wherein one of the first and second partial frequency paths is coupled to a control signal line that is configured to control switching of the one of the first and second partial frequency paths,

wherein the one of the first and second partial frequency paths that is coupled to the control signal line comprises:

a first switch arranged an input the matching network of the one of the first and second partial frequency paths that is coupled to the control signal line; and

a second switch arranged on an output side of the matching network of the one of the first and second partial frequency paths that is coupled to the control signal line,

wherein the first and second switches are configured so that when a control signal is applied via the control signal line, the one of the first and second partial frequency paths is shorted to ground, which reflects signals in the one of the first and second partial frequency paths.

2. A circuit, comprising:

a high-frequency amplifier stage, which includes a high-frequency amplifier with an input and an output, wherein the output of the high-frequency amplifier is coupled to a total high-frequency path carrying a total frequency band;

a first partial frequency path coupled to the total high-frequency path, wherein the first partial frequency path includes

a first pass filter configured to pass a first partial frequency band,

a first matching network coupled to the first pass filter, wherein the first matching network is configured to match the high-frequency amplifier stage in the first partial frequency band, and

a further first pass filter coupled to the first matching network, wherein the further first pass filter is configured to pass the first partial frequency band;

a second partial frequency path coupled to the total high-frequency path, wherein the second partial frequency path includes

a second pass filter configured to pass a second partial frequency band,

a second matching network coupled to the second pass filter, wherein the second matching network is configured to match the high-frequency amplifier stage in the second partial frequency band, and

a further second pass filter coupled to the second matching network, wherein the further second pass filter is configured to pass the second partial frequency band; and

a coupling to an output of the first and second partial frequency paths, wherein the coupling combines an output of the first and second partial frequency paths into the total high-frequency path,

wherein one of the first and second partial frequency paths is coupled to a control signal line that is configured to control switching of the one of the first and second partial frequency paths,

wherein the one of the first and second partial frequency paths that is coupled to the control signal line comprises:

at least one multi-circuit switch arranged on an input side or an output side of the matching network of the one of the first and second partial frequency paths that is coupled to the control signal line, wherein the at least one multi-circuit switch is configured to decouple the one of the first and second partial frequency paths that is coupled to the control signal line from the circuit when a control signal is supplied via the control signal line.

3. The circuit of claim 1 , wherein the first pass filter and further first pass filter are configured as the first matching network and the second pass filter and further second pass filter are configured as the second matching network.

4. The circuit of claim 1 , further comprising:

frequency-dividing networks arranged between the output of the high-frequency amplifier stage and an input of the first and second partial frequency paths.

5. The circuit of claim 1 , wherein the first and second switches are switching transistors, and the circuit is monolithically integrated on a single semiconductor chip.

6. The circuit of claim 2 , wherein the at least one multi-circuit switch is a switching transistor, and the circuit is monolithically integrated on a single semiconductor chip.

7. The circuit of claim 1 , wherein the first and second switches are microelectricalmechanical systems.

8. The circuit of claim 2 , wherein the at least one multicircuit switch is a microelectricalmechanical system.