Patent ID: 6917259
Filing Date: 2005-07-12
Classification: H01P,H03H,H05K

Abstract:
1. A high frequency module substrate device comprising: a base substrate in which a wiring layer is formed through an insulating layer on the principal surface of a core substrate comprised of an organic substrate, and at least a distributed parameter circuit pattern including a coupler of one side short type line and one side open type line having frequency characteristic of λ/4 is formed within this wiring layer and the principal surface of the uppermost layer is flattened to constitute a buildup formation surface; a high frequency circuit unit including a lumped parameter circuit pattern and passive elements adapted so that a wiring layer is formed on the buildup formation surface of the base substrate through an insulating layer, and formed in correspondence with the distributed parameter circuit pattern within the wiring layer to constitute a thin film capacitor; and select switch means provided between connection patterns for carrying out interlayer connection between the thin film capacitor and the coupler to switch electric connection state between the thin film capacitor and the coupler, thus to carry out switching of load state of parallel capacity with respect to the coupler of the thin film capacitor through the select switch means to thereby carry out band switching.