# US 2018/0323751 A1 · Amplifier arrangement and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323751 A1 - Document ID: US20180323751A1 - Status: Published application - Kind: A1 - Application number: 15/825,751 - Filed: 2017-11-29 - Published: 2018-11-08 - Earliest claimed: 2017-05-05 - Assignees: Rohde & Schwarz GmbH & Co. KG - Applicants: Rohde & Schwarz GmbH & Co. KG - Inventors: Orell Garten; Raimon GÖRITZ - Web page: https://patentgrep.com/patent/US20180323751A1 ## CPC - H03F 1/486: {with IC amplifier blocks} - H03F 1/26: Modifications of amplifiers to reduce influence of noise generated by amplifying elements - H03F 1/42: Modifications of amplifiers to extend the bandwidth - H03F 3/191: Tuned amplifiers (H03F3/193, H03F3/195 take precedence) - H03F 3/20: Power amplifiers, e.g. Class B amplifiers, Class C amplifiers (H03F3/26 - H03F3/30 take precedence) - H03F 3/211: {using a combination of several amplifiers (H03F3/60 takes precedence)} - H03F 2200/198: A hybrid coupler being used as coupling circuit between stages of an amplifier circuit - H03F 2200/204: A hybrid coupler being used at the output of an amplifier circuit - H03F 2200/36: the amplifier comprising means for increasing the bandwidth - H03F 2200/39: Different band amplifiers are coupled in parallel to broadband the whole amplifying circuit - H03F: AMPLIFIERS ## Abstract The present invention provides an amplifier arrangement for amplifying a broadband signal, the amplifier arrangement comprising a signal splitter configured to receive the broadband signal and output a first split signal and a second split signal, and a balanced amplifier that is coupled to the signal splitter and is configured to amplify the first split signal and the second split signal and is configured to output a single amplified broadband signal based on the amplified first split signal and the amplified second split signal. The present invention further provides a respective method. ## Claims ### Claim 1 An amplifier arrangement for amplifying a broadband signal, the amplifier arrangement comprising: a signal splitter configured to receive the broadband signal and output a first split signal and a second split signal, and a balanced amplifier that is coupled to the signal splitter and which is configured to amplify the first split signal and the second split signal and which is further configured to output a single amplified broadband signal based on the amplified first split signal and the amplified second split signal. ### Claim 2 (depends on 1) The amplifier arrangement of claim 1, wherein the signal splitter comprises a splitter input port configured to receive the broadband signal and a first splitter output port and a second splitter output port, wherein the signal splitter is configured to output the first split signal via the first splitter output port and the second split signal via the second splitter output port. ### Claim 3 (depends on 2) The amplifier arrangement of claim 2, wherein the signal splitter comprises a diplexer. ### Claim 4 (depends on 1) The amplifier arrangement of claim 1, wherein the balanced amplifier comprises: a first directional coupler that is coupled to the signal splitter and is configured to receive the first split signal and the second split signal and to output a first decoupled signal and a second decoupled signal, a first amplifier unit that is coupled to the first directional coupler and is configured to receive and amplify the second decoupled signal, a second amplifier unit that is coupled to the first directional coupler and is configured to receive and amplify the first decoupled signal, and a second directional coupler that comprises a first coupler input port and a second coupler input port and a first coupler output port and a second coupler output port, wherein the first coupler input port is coupled to the first amplifier unit and the second coupler input port is coupled to the second amplifier unit and wherein the second directional coupler is configured to output the amplified broadband signal via the first coupler output port. ### Claim 5 (depends on 4) The amplifier arrangement of claim 4, wherein the first directional coupler comprises a first input port and a second input port and a first output port and a second output port and wherein the first amplifier unit is coupled to the second output port and the second amplifier unit is coupled to the second output port. ### Claim 6 (depends on 5) The amplifier arrangement of claim 5, wherein the first splitter output port of the diplexer is coupled with the first input port of the first directional coupler, and wherein the second splitter output port of the diplexer is coupled with the second input port of the first directional coupler. ### Claim 7 (depends on 6) The amplifier arrangement of claim 6, wherein the diplexer is configured to provide the first split signal via the first splitter output port with a frequency range above a cut-off frequency of the first directional coupler, and wherein the diplexer (202) is configured to provide the second split signal via the second splitter output port with a frequency range below a cut-off frequency of the first directional coupler. ### Claim 8 A method for amplifying a broadband signal, the method comprising: receiving (the broadband signal, splitting the broadband signal into a first split signal and a second split signal, amplifying the first split signal and the second split signal in a balanced amplifier, and outputting a single amplified broadband signal based on the amplified first split signal and the amplified second split signal. ### Claim 9 (depends on 8) The method of claim 8, wherein the broadband signal is received via a splitter input port of a signal splitter, and splitting comprises outputting the first split signal via a first splitter output port and the second split signal via a second splitter output port of the signal splitter. ### Claim 10 (depends on 9) The method of claim 9, wherein receiving and splitting is performed by a diplexer. ### Claim 11 (depends on 8) The method of claim 8, wherein amplifying and outputting comprises: receiving the first split signal and the second split signal at a first directional coupler and outputting a first decoupled signal and a second decoupled signal via the first directional coupler, amplifying the second decoupled signal with a first amplifier unit, and amplifying the first decoupled signal with a second amplifier unit, and receiving the amplified second decoupled signal via a first coupler input port of a second directional coupler and the amplified first decoupled signal via a second coupler input port of a second directional coupler, and outputting the single amplified signal via a first coupler output port of the second directional coupler. ### Claim 12 (depends on 11) The method of claim 11, wherein the second decoupled signal is provided from a second output port of the first directional coupler to the first amplifier unit, and wherein the first decoupled signal is provided from a first output port of the first directional coupler to the second amplifier unit. ### Claim 13 (depends on 10) The method of claim 10, wherein the first split signal is provided from the first splitter output port of the diplexer to the first input port of the first directional coupler, and wherein the second split signal is provided from the second splitter output port of the diplexer to the second input port of the first directional coupler. ### Claim 14 (depends on 12) The method of claim 12, wherein the first split signal is provided from the first splitter output port of the diplexer to the first input port of the first directional coupler, and wherein the second split signal is provided from the second splitter output port of the diplexer to the second input port of the first directional coupler. ### Claim 15 (depends on 13) The method of claim 13, wherein splitting comprises providing the first split signal with a frequency range above a cut-off frequency of the first directional coupler, and providing the second split signal with a frequency range below a cut-off frequency of the first directional coupler. ### Claim 16 (depends on 3) The amplifier arrangement of claim 3, wherein the first splitter output port of the diplexer is coupled with the first input port of the first directional coupler, and wherein the second splitter output port of the diplexer is coupled with the second input port of the first directional coupler.