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1. 发明授权

US06504449B2 Phase compensated switched attenuation pad 有权
标题翻译：相位补偿开关衰减垫
公开(公告)号：US06504449B2
公开(公告)日：2003-01-07
申请号：US09778578
申请日：2001-02-07
申请人： Cornelius Constantine , Richard G. Barber
发明人： Cornelius Constantine , Richard G. Barber
IPC分类号： H03H1124
CPC分类号： H03H11/245
摘要： A phase compensated switched attenuation device 6 is provided for attenuating high frequency signals while maintaining an insertion loss of less than 1 dB up to 3 GHz. A single GaAs FET 12 is coupled between input port 8 and output port 9 in parallel with a 20 dB pad 10 for switching the device 6 between a through state and an attenuation state. First and second isolation FETs 14 and 16 are coupled between the GaAs FET 12 and pad terminals 18 and 19 to isolate the GaAs FET 12, decrease return loss when the GaAs FET 12 is on, and increase isolation of the GaAs FET 12 from the pad 10 when the GaAs FET 12 is on. A resistor 24 or a series combination of a resistor 24 and capacitor 26 can be coupled to the pad terminals 18 and 19 in parallel with the pad 10 to improve return loss when the GaAs FET 12 is on. Resistors 21, 22, and 23 are also provided to reduce distortion, coupling gates of the FETs 12, 14, and 16 to a plurality of voltage references V1 and V2.
摘要翻译：提供相位补偿开关衰减装置6用于衰减高频信号，同时保持小于1GHz至3GHz的插入损耗。单个GaAs FET 12与输入端口8和输出端口9并联连接到20dB焊盘10，用于在通过状态和衰减状态之间切换装置6。第一和第二隔离FET 14和16耦合在GaAs FET 12和焊盘端子18和19之间，以隔离GaAs FET 12，当GaAs FET 12导通时降低回波损耗，并增加GaAs FET 12与焊盘的隔离当GaAs FET 12接通时，电阻器24或电阻器24和电容器26的串联组合可以与焊盘10并联连接到焊盘端子18和19，以在GaAs FET 12接通时提高回波损耗。还提供电阻器21,22和23以减小失真，将FET 12,14和16的栅极耦合到多个电压基准V1和V2。

2. 发明授权

US4954790A Enhanced coupled, even mode terminated baluns, and mixers and modulators constructed therefrom 失效
标题翻译：增强耦合，偶模式终端平衡 - 不平衡变压器，以及由此构成的混频器和调制器
公开(公告)号：US4954790A
公开(公告)日：1990-09-04
申请号：US437510
申请日：1989-11-15
申请人： Richard G. Barber
发明人： Richard G. Barber
IPC分类号： H03D7/14 , H03D9/06 , H03H7/42
CPC分类号： H03D9/0633 , H03H7/42 , H03D2200/0013 , H03D2200/0023 , H03D7/1408
摘要： A balun section formed of a pair of transmission lines connected between separate pairs of corresponding input and output terminals with a pair of capacitors connected in series between the output terminals and another transmission line connected in series with a resistor between the circuit ground and the interconnection between the pair of capacitors. A multisection balun is constructed from a plurality of such balun sections connected in cascade. In one embodiment, the outputs of a pair of multisection baluns are supplied to a circuit such as a mixer or the like.
摘要翻译：平衡 - 不平衡转换部分由一对传输线组成，该对传输线连接在分离的相应输入和输出端子对之间，一对电容器串联连接在输出端子与另一传输线路之间，该传输线路与电路之间的电阻串联连接在电路接地与互连之间这对电容器。多级平衡 - 不平衡变换器由多个级联连接的平衡 - 不平衡转换器构成。在一个实施例中，一对多区域巴伦的输出被提供给诸如混合器等的电路。

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