| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a front end module which is easily compatible with an external reception circuit, can reduce the number of necessary parts and its mounting surface area, and miniaturize a mobile communication apparatus. SOLUTION: An antenna switch 6, a low-pass filter 5, a surface acoustic wave filter 7 and a balun 8 are integrally made of a multiplayer substrate 11 and a part built in or mounted on the substrate 11 to thereby form a module.</p> |
