| 摘要 |
<p>An improved filter structure for a radio device which is capable of more simplifying the construction of a filter, reducing the fabrication cost, and facilitating a better performance. The filter structure includes a plurality of cylindrical high frequency inductors (1 and 2), a plurality of insertion grooves (3 and 4) into which the inductors (1 and 2) are inserted, and a Printed Circuit Board (PCB) (8) having a ground circuit (7) for grounding input/output terminals (5 and 6) and the inductors (1 and 2) when the input/output terminals (5 and 6) and the inductors (1 and 2) are inserted, wherein the inductors (1 and 2) are coupled by an M-coupling method, and a condenser capacity is determined by a distribution capacity (Cs) between the PCB (8) and two high frequency inductors (1 and 2).</p> |
