Multi-layer composite electronic component

• US 6,411,178 B1
• Filed: 08/23/2000
• Issued: 06/25/2002
• Est. Priority Date: 08/23/1999
• Status: Expired due to Fees

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Kato, Noboru, Nomura, Hiroko, Matsumura, Sadayuki
• Primary Examiner(s): Pascal, Robert
• Assistant Examiner(s): TAKAOKA, DEAN O
• Application Number:
  US09/644,259
• Time in Patent Office: 671 Days
• Field of Search: 333/134, 333/126, 333/204, 333/185, 333/132, 333/175
• US Class Current: 333/134
• CPC Class Codes: H03H 2001/0085 Multilayer, e.g. LTCC, HTCC, green sheets inside PCB filters H05K
• CPC Class Codes: H03H 7/0115 comprising only inductors and capacitors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence
• CPC Class Codes: H03H 7/1708 Comprising bridging elements, i.e. elements in a series path without own reference to ground and spanning branching nodes of another series path H03H7/07 takes precedence
• CPC Class Codes: H03H 7/175 Series LC in series path H03H7/1783 takes precedence
• CPC Class Codes: H03H 7/1775 Parallel LC in shunt or branch path H03H7/1791 takes precedence
• CPC Class Codes: H03H 7/38 Impedance-matching networks
• CPC Class Codes: H03H 7/463 Duplexers

Abstract

A compact multi-layer composite electronic component is such that electric couplings occurring between a plurality of high-frequency circuits are reduced. In this compact multi-layer composite electronic component, the axes of the inductors of LC resonators defining a first band pass filter circuit (BPF 1) are disposed substantially perpendicularly to the axes of the inductors of LC resonators defining a second band pass filter circuit (BPF 2). The inductors of the LC resonators defining the BPF 1 are constituted by joining via-holes disposed on insulating sheets. The inductors of the LC resonators defining the BPF 2 are constituted of inductor patterns provided on the surfaces of specific ones of the insulating sheets.

Claims

1. A multi-layer composite electronic component comprising:

a multi-layer body defined by a plurality of insulating layers, a plurality of inductor conductors, and a plurality of capacitor conductors;

a first high-frequency circuit having a plurality of LC resonators including a plurality of inductors defined by the inductor conductors and a plurality of capacitors defined by the capacitor conductors; and

a second high-frequency circuit having a plurality of LC resonators including a plurality of inductors defined by the inductor conductors and a plurality of capacitors defined by the capacitor conductors;

wherein at least one of the inductors of the first high-frequency circuit is disposed substantially perpendicularly to at least one of the inductors of the second high-frequency circuit.

2. The multi-layer composite electronic component according to claim 1, further comprising a first three-stage band pass filter and a second three-stage band pass filter.

3. The multi-layer composite electronic component according to claim 1, wherein the first three-stage band pass filter includes at least three LC parallel resonators.

4. The multi-layer composite electronic component according to claim 1, wherein the second three-stage band pass filter includes at least three LC parallel resonators.

5. The multi-layer composite electronic component according to claim 1, further comprising a first dummy insulating sheet having first via-holes provided thereon, a second dummy insulating sheet having second via-holes provided thereon, a first insulating sheet having third via-holes and first capacitor patterns provided thereon, a second insulating sheet having fourth via-holes and second capacitor patterns provided thereon, a third insulating sheet having fifth via-holes and first inductor patterns provided thereon, a fourth insulating sheet having sixth via-holes and second inductor patterns provided thereon, a fifth insulating sheet having seventh via-holes and first coupling capacitor patterns provided thereon, a sixth insulating sheet having third capacitor patterns provided thereon, a sixth insulating sheet having fourth capacitor patterns provided thereon, a seventh insulating sheet having second coupling capacitors provided thereon, an eighth insulating sheet having first shield patterns provided thereon, and a ninth insulating sheet having second shield patterns provided thereon.

6. The multi-layer composite electronic component according to claim 1, wherein the first through ninth insulating sheets are made of a mixture of a dielectric powder, a magnetic powder, and a binding agent.

7. The multi-layer composite electronic component according to claim 1, wherein the first and second inductor patterns and the first through fourth capacitor patterns are made of one of Ag, Pd, Cu, Au, or Ag—

Pd.

8. The multi-layer composite electronic component according to claim 1, wherein the insulating sheets are stacked on each other in a stacking direction and the axes of the plurality of the inductors are substantially parallel to a stacking direction of the insulating sheets.

9. The multi-layer composite electronic component according to claim 1, wherein the plurality of inductors are arranged such that when currents flow through the plurality of inductors, magnetic fields that are substantially perpendicular to the axial direction of each of the plurality of inductors are generated around each of the inductors.

10. The multi-layer composite electronic component according to claim 1, further comprising a transmission terminal electrode and a reception terminal electrode provided on the right and left end surfaces of the multi-layer body.

11. The multi-layer composite electronic component according to claim 1, further comprising an antenna terminal electrode and ground terminal electrodes provided on the back surface of the multi-layer body, and ground terminal electrodes are provided on the front surface of the multi-layer body.

12. The multi-layer composite electronic component according to claim 11, further comprising a first and second band pass filter circuit, wherein signals input to the transmission terminal electrode are output to the antenna terminal electrode via the first band pass filter circuit, and signals input to the antenna terminal electrode are transmitted to the reception terminal electrode via the second band pass filter circuit and outputted.

13. The multi-layer composite electronic component according to claim 1, further comprising a first and second band pass filter circuit including inductors, wherein the axial directions of the inductors of the first band pass filter circuit are substantially perpendicular to the axial directions of the inductors of the second band pass filter circuit.

14. The multi-layer composite electronic component according to claim 13, wherein a magnetic field generated when currents flow through each of the inductors of the first band pass filter circuit is substantially perpendicular to a magnetic field generated when currents flow through each of the inductors of the second band pass filter circuit.

15. The multi-layer composite electronic component according to claim 1, wherein the component is a duplexer.

16. A multi-layer composite electronic component comprising:

a multi-layer body defined by a plurality of insulating layers, a plurality of inductor conductors, and a plurality of capacitor conductors;

a first band pass circuit having a plurality of LC resonators including a plurality of inductors defined by the inductor conductors and a plurality of capacitors defined by the capacitor conductors; and

a second band pass circuit having a plurality of LC resonators including a plurality of inductors defined by the inductor conductors and a plurality of capacitors defined by the capacitor conductors;

wherein all of the inductors of the first high-frequency circuit are substantially perpendicular to all of the inductors of the second high-frequency circuit.

17. The multi-layer composite electronic component according to claim 16, further comprising a first three-stage band pass filter and a second three-stage band pass filter.

18. The multi-layer composite electronic component according to claim 16, wherein the first three-stage band pass filter includes at least three LC parallel resonators.

19. The multi-layer composite electronic component according to claim 16, where in the second three-stage band pass filter includes at least three LC parallel resonators.

20. The multi-layer composite electronic component according to claim 16, further comprising a first dummy insulating sheet having first via-holes provided thereon, a second dummy insulating sheet having second via-holes provided thereon, a first insulating sheet having third via-holes and first capacitor patterns provided thereon, a second insulating sheet having fourth via-holes and second capacitor patterns provided thereon, a third insulating sheet having fifth via-holes and first inductor patterns provided thereon, a fourth insulating sheet having sixth via-holes and second inductor patterns provided thereon, a fifth insulating sheet having seventh via-holes and first coupling capacitor patterns provided thereon, a sixth insulating sheet having third capacitor patterns provided thereon, a sixth insulating sheet having fourth capacitor patterns provided thereon, a seventh insulating sheet having second coupling capacitors provided thereon, an eighth insulating sheet having first shield patterns provided thereon, and a ninth insulating sheet having second shield patterns provided thereon.

21. The multi-layer composite electronic component according to claim 16, wherein the insulating sheets are stacked on each other in a stacking direction and the axes of the plurality of the inductors are substantially parallel to a stacking direction of the insulating sheets.

22. The multi-layer composite electronic component according to claim 16, wherein the plurality of inductors are arranged such that when currents flow through the plurality of inductors, magnetic fields that are substantially perpendicular to the axial direction of each of the plurality of inductors are generated around each of the inductors.