| 摘要 |
PROBLEM TO BE SOLVED: To provide a layered directional coupler which contains a low pass filter function. SOLUTION: A directional coupler comprises a principal line and a sub line. The principal line is made into an L element and earth-connected by a capacitor. The layered directional coupler is parallel-connected to other capacitors and compounded with a low pass filter at both ends of the principal line. On one side of the layered directional coupler, an external terminal linked to the edge of the principle line and other external terminals linked to other edges of the main line are formed. On other side which counters a side of the layered directional coupler, the external terminal linked to the edge of the sub line and other external terminal linked to other edge of the sub line are formed. COPYRIGHT: (C)2005,JPO&NCIPI
|
