| 摘要 |
A high-frequency switch, having a first port (P1), a second port (P2) and a third port (P3) and serving to selectively connect the second port (P2) to the first port (P1) or the third port (P3). The switch includes a first distributed constant line (2a) and a second distributed constant line (2b) which are connected in series between the first and second ports (P1, P2) and a third distributed constant line (2c) and a fourth distributed constant line (2d) which are connected in series between the second and third ports (P2, P3). A first diode (3a) is connected between the first port (P1) and the ground, a second diode (3b) is connected between a junction point between the first and second distributed constant lines (2a, 2b) and the ground, a third diode (3c) is connected between a junction point between the third and fourth distributed constant lines (2c, 2d) and the ground, and a fourth diode (3d) is connected between the third port (P3) and the ground. A first resistor (4a) and a second resistor (4b) are connected in series between grounded electrodes of the first and fourth diodes (3a, 3d), and a third resistor (4c) and a fourth resistor (4d) are connected in series between grounded electrodes of the second and third diodes (3b, 3c). The first and second diodes (3a, 3b) have different polarity, the third and fourth diodes (3c, 3d) have different polarity and the first and fourth diodes (3a, 3d) have different polarity with respect to a line between the first and third ports (P1, P3). <MATH> |
