Patent ID: 7336221

Claim:
A high-frequency package comprising: a high-frequency semiconductor including a bias-and-control-signal terminal; a multilayer dielectric substrate including: a surface-layer ground conductor configured to mount the high-frequency semiconductor; at least one first signal via configured to be connected to the bias-and-control-signal terminal; at least one second signal via configured to be connected to an external terminal for a bias and control signal; at least one internal-layer signal line configured to connect between the first signal via and the second signal via; at least one internal-layer ground conductor arranged around the first signal via, the second signal via, and the internal-layer signal line; a plurality of ground vias arranged around the first signal via, the second signal via, and the internal-layer signal line, on the internal-layer ground conductor; and at least one resistance film arranged on at least one of an upper surface and a lower surface of at least one of the internal-layer signal lines; and an electromagnetic shielding member configured to cover at least a part of the high-frequency semiconductor, wherein the electromagnetic shielding member covers a region that includes the first signal via, and the second signal via is arranged outside of the region.