Patent ID: 9082785
Filing Date: 2015-07-14
Classification: H01L,H05K

Abstract:
1. A high-frequency circuit board, comprising: a high-frequency circuit arranged on one outer layer of a multilayer substrate of three or more layers having two outer layers and one or more internal layers; a ground layer provided between the one outer layer and the internal layer; a bias layer for forming a pattern of a bias line of the high-frequency circuit on a surface different from the surface provided with the ground layer of the internal layer; a transmission line including a penetrating through hole penetrating from the one outer layer to the other outer layer and electrically connected to the bias line; and a dielectric that is arranged around the penetrating through hole, permittivity of the dielectric being such that resonance frequency fat a line including at least an end on the one outer layer side of the transmission line and the bias line satisfies a criterion given by f<fa×0.8 or f>fa×1.2, where fa denotes an operating frequency of the high-frequency circuit.