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公开(公告)号：US11616477B2
公开(公告)日：2023-03-28
申请号：US17126756
申请日：2020-12-18
Applicant: Northrop Grumman Systems Corporation
Inventor： Eric C. Wagner , Timothy R. LaRocca
Abstract: A radio frequency (RF) summer circuit having a characteristic impedance Zo comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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公开(公告)号：US11817831B2
公开(公告)日：2023-11-14
申请号：US18114401
申请日：2023-02-27
Applicant: Northrop Grumman Systems Corporation
Inventor： Eric C. Wagner , Timothy R. LaRocca
CPC classification number: H03F3/195 , H03F1/56 , H03F3/72 , H03F2200/451
Abstract: A radio frequency (RF) summer circuit having a characteristic impedance Z0 comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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公开(公告)号：US20230216455A1
公开(公告)日：2023-07-06
申请号：US18114401
申请日：2023-02-27
Applicant: Northrop Grumman Systems Corporation
Inventor： Eric C. Wagner , Timothy R. LaRocca
CPC classification number: H03F3/195 , H03F3/72 , H03F1/56 , H03F2200/451
Abstract: A radio frequency (RF) summer circuit having a characteristic impedance Z0 comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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公开(公告)号：US20220200547A1
公开(公告)日：2022-06-23
申请号：US17126756
申请日：2020-12-18
Applicant: Northrop Grumman Systems Corporation
Inventor： Eric C. Wagner , Timothy R. LaRocca
Abstract: A radio frequency (RF) summer circuit having a characteristic impedance Zo comprises first and second ports coupled by first and second resistances, respectively, to a junction. The circuit further comprises a series combination of a third resistance and a switch movable between open and closed positions and an amplifier having input and output terminals and operable in an off state and an on state wherein the series combination is coupled across the input and output terminals of the amplifier between the junction and a third port. The first resistance, second resistance, and the third resistance are all substantially equal to Z0/3. Further, when the switch is moved to the closed position and the amplifier is switched to the off state a passive mode of operation is implemented and when the switch is moved to the open position and the amplifier is switched to the on state an active mode of operation is implemented. The RF summer circuit develops a summed signal at the third port equal to a sum of signals at the first and second ports modified by one of first and second gain values.
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