Laminated filter with a single shield conductor, integrated device, and communication apparatus

A communication apparatus comprising:

• transmitting and receiving means of executing transmission and/or reception;
• and
• a laminated filter which filters a transmitted signal used for said transmission and/or a received signal used for said reception, the laminated filter including:
• a plurality of grounding conductors disposed inside or outside of an integrated device comprised of a plurality of dielectric layers laminated together;
• a first filter sandwiched between two of said grounding conductors, said grounding conductors having a shielding function;
• a second filter sandwiched between said two grounding conductors;
• and
• a single shielding conductor connected to said plurality of grounding conductors;
• wherein said first filter is disposed in an area different from an area of said second filter, and a boundary area is disposed between the area of said first filter and the area of said second filter;
• the single shielding conductor is disposed in said boundary area and only the single shielding conductor by itself and free-of other coupling electrodes shields electromagnetic induction between said first and second filters;
• the first and second filters each including strip line conductors disposed on a single dielectric layer of the plurality of dielectric layers;
• and
• the single shielding conductor being a strip line disposed only on the single dielectric layer.

A integrated device comprising:

• a laminated filter including a plurality of grounding conductors disposed inside or outside of an integrated device comprised of a plurality of dielectric layers laminated together,
• a first filter sandwiched between two of said grounding conductors, said grounding conductors having a shielding function,
• a second filter sandwiched between said two grounding conductors, and
• a single shielding conductor connected to said plurality of grounding conductors,
• wherein said first filter is disposed in an area different from an area of said second filter, and a boundary area is disposed between the area of said first filter and the area of said second filter,
• the single shielding conductor is disposed in said boundary area and only the single shielding conductor by itself and free-of other coupling electrodes shields electromagnetic induction between said first and second filters,
• the first and second filters each including strip line conductors disposed on a single dielectric layer of the plurality of dielectric layers, and
• the single shielding conductor being a strip line disposed only on the single dielectric layer, and
• an integrated circuit mounted in said integrated device.