公开(公告)号：EP0350323A3

公开(公告)日：1990-08-16

申请号：EP89306917.9

申请日：1989-07-07

申请人： GEC-MARCONI LIMITED

发明人： Flynn, Stephen John ,  King, Gerard

IPC分类号： H01P1/10

CPC分类号： H01P1/10

摘要： A transmission line switch allows a single output line (3)to be switched to one of two or more input lines (1,2) to which it is permanently connected at a common junction (4). Each input line (1,2) has an associated amplifier stage (10) which can be biased in a normal high gain ('on') state, or in an isolation ('off') state. Suitable biasing in the 'off' state ensures that the amplifier stage output presents a low impedance to its own input line, the length (L) of which is chosen to reflect a high impedance at the junction (4) with the other lines. Correct design enables the return loss and insertion loss of the 'on' path to be kept to low values whilst simultaneously offering a high insertion loss to the 'off' path signals.

公开(公告)号：EP0350323B1

公开(公告)日：1993-11-03

申请号：EP89306917.9

申请日：1989-07-07

申请人： GEC-MARCONI LIMITED

发明人： Flynn, Stephen John ,  King, Gerard

IPC分类号： H01P1/10

CPC分类号： H01P1/10

公开(公告)号：EP0350323A2

公开(公告)日：1990-01-10

申请号：EP89306917.9

申请日：1989-07-07

申请人： GEC-MARCONI LIMITED

发明人： Flynn, Stephen John ,  King, Gerard

IPC分类号： H01P1/10

CPC分类号： H01P1/10

摘要： A transmission line switch allows a single output line (3)to be switched to one of two or more input lines (1,2) to which it is permanently connected at a common junction (4). Each input line (1,2) has an associated amplifier stage (10) which can be biased in a normal high gain ('on') state, or in an isolation ('off') state. Suitable biasing in the 'off' state ensures that the amplifier stage output presents a low impedance to its own input line, the length (L) of which is chosen to reflect a high impedance at the junction (4) with the other lines. Correct design enables the return loss and insertion loss of the 'on' path to be kept to low values whilst simultaneously offering a high insertion loss to the 'off' path signals.

摘要翻译： 传输线开关允许将单个输出线（3）切换到其在公共接点（4）处永久连接的两条或多条输入线（1,2）中的一条。 每个输入线（1,2）具有相关联的放大器级（10），其可以以正常的高增益（'on'）状态或隔离（'off'）状态偏置。 “关闭”状态下的合适偏置确保放大器级输出对其自身的输入线呈现低阻抗，其长度（L）被选择为在其它线路处与接合点（4）反射高阻抗。 正确的设计使得“on”路径的回波损耗和插入损耗保持在低值，同时为“关闭”路径信号提供高插入损耗。