Package

A package comprising:

• a bottomed cylindrical container having an open upper surface, the container being made of a metal;
• an engaging section comprising a step on an opening edge of the container and extending toward an outer peripheral side;
• a dielectric substrate disposed on a bottom surface of the container, the dielectric substrate on which a device is mounted;
• an input/output interface comprising a side surface of the container and connected to the device;
• a plate-like radio wave absorber engaged to the engaging section so as to cover a whole region of the bottom surface of the container;
• and
• a lid made of a metal that closes an opening end of the container and seals the inside of the container.

A package comprising:

• a metal container having a bottom surface and an open upper surface;
• an engaging section comprising a step on an opening edge of the container, the engaging section extending outward from the container;
• a dielectric substrate disposed on the bottom surface of the container;
• a device mounted on the dielectric substrate;
• an input/output interface on a side surface of the container and connected to the device;
• a radio wave absorber engaged with the engaging section, the radio wave absorber covering an entire area above the bottom surface of the container;
• and
• a metal lid that closes the open upper surface of the container and seals an interior of the container.