| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for suppressing a power loss by ensuring satisfactory VSWR (Voltage Standing Wave Ratio) in a variable attenuator having π-connected PIN diodes. <P>SOLUTION: An inductor L1 for canceling an interterminal capacitance of a first PIN diode D1 is connected in series with the first PIN diode D1 in a high frequency transmission path. Inductors L2, L3 for canceling interterminal capacitances of a second PIN diode D2 and a third PIN diode D3 are disposed in paths of the PIN diodes D2, D3, where bias currents flow. The frequency of target high frequency signals for canceling the interterminal capacitances is, for example, 1 GHz or higher. <P>COPYRIGHT: (C)2012,JPO&INPIT |
