| 摘要 |
PROBLEM TO BE SOLVED: To surely prevent noise from the other wiring or circuit component from being superimposed on a circuit component or the like for processing a signal of 1.5 GHz band in a multilayer substrate for a high frequency RF (radio frequency) module equipped with a circuit module for receiving the signal of 1.5 GHz transmitted from a GPS satellite and down converting the signal into a signal of a band of several tens MHz. SOLUTION: In a multilayer substrate 10 for the high frequency RF module equipped with a high frequency RF circuit 3 for receiving the signal of 1.5 GHz transmitted from a GPS satellite 1, a down converter circuit 4 for converting the received signal of 1.5 GHz received from the high frequency RF circuit into the signal of the band of several tens MHz and a signal processing circuit 5 for applying required processing to the signal of the band of several tens MHz converted by the down converter circuit, a wiring pattern is not disposed on a boundary surface between a top layer 10a and the next layer 10b at least in the multilayer substrate positioned under the high frequency RF circuit. COPYRIGHT: (C)2004,JPO&NCIPI |
