Multiple-resonant antenna, antenna module, and radio device using the multiple-resonant antenna

• US 20040004571A1
• Filed: 04/23/2003
• Published: 01/08/2004
• Est. Priority Date: 04/25/2002
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Sato, Junji, Adachi, Naoki
• Granted Patent: US 6,876,328 B2
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 9/0428 radiating a circular polarised wave
• CPC Class Codes: H01Q 9/0457 electromagnetically coupled to the feed line

Abstract

Disclosed is a multiple-resonant surface-mounted antenna used for a radio device for mobile communication in a microwave band. A high frequency and a low frequency patch antenna electrodes are arranged apart from each other on one main surface of a dielectric block and a feeding line electrode is electromagnetically connected to the respective patch antenna electrodes. Each feeding line electrode is connected to each feeding terminal electrode and connected to each input/output line in every frequency band of a substrate, thereby realizing the multiple-resonant surface-mounted antenna capable of coping with two frequency bands.

Claims

1. A multiple-resonant antenna comprising:

a dielectric block;

a plurality of patch antenna electrodes formed on one main surface of the dielectric block;

one or a plurality of feeding terminal electrode formed on a lateral side of the dielectric block; and

one or a plurality of feeding line electrode connected to the feeding terminal electrode so as to be electromagnetically connected to the patch antenna electrode.

2. The multiple-resonant antenna, according to claim 1, comprising

a ground electrode on a bottom of the dielectric block.

3. The multiple-resonant antenna, according to claim 2, comprising at least a ground terminal electrode connected to the ground electrode, which is formed on a lateral side of the dielectric block.

4. The multiple-resonant antenna, according to claim 2, comprising a separating element formed by a space for separating the ground electrode and the feeding terminal electrode on the bottom of the dielectric block.

5. The multiple-resonant antenna, according to claim 1, comprising the feeding terminal electrode that is a fixing terminal at a surface mounting time, formed on a lateral side of the dielectric block.

6. The multiple-resonant antenna, according to claim 1, wherein the patch antenna electrode receives and transmits a circularly polarized wave.

7. The multiple-resonant antenna, according to claim 1, comprising a feeding line groove formed by a hollow provided on a bottom or a top of the dielectric block, which groove accommodates the feeding line electrode.

8. The multiple-resonant antenna, according to claim 7, wherein the feeding line groove has a shape of straight line.

9. The multiple-resonant antenna, according to claim 7, wherein the feeding line groove has a shape of cross.

10. The multiple-resonant antenna, according to claim 7, comprising a ground electrode that is a ground of the antenna, formed by a thin metal plate attached on the bottom of the dielectric block to cover the feeding line groove on the bottom of the dielectric block.

11. The multiple-resonant antenna, according to claim 1, wherein

the feeding terminal electrode serves as a fixing terminal at a surface mounting time.

12. The multiple-resonant antenna, according to claim 1, wherein

the dielectric block has a square horizontal cross section.

13. The multiple-resonant antenna, according to claim 1, wherein

the dielectric block is that one formed by a multi-layer substrate, including the feeding line electrode as an internal electrode and the feeding terminal electrode is formed by side metalize.

14. The multiple-resonant antenna, according to claim 1, wherein

the dielectric block is that one formed by a multi-layer substrate, including the feeding line electrode as an internal electrode and the feeding terminal electrode is formed by a through hole bored in a thickness direction of the dielectric block, so as to connect with an end of the feeding line.

15. A multiple-resonant antenna comprising:

a dielectric block;

a first patch antenna electrode formed on one main surface of the dielectric block, for receiving and transmitting a radio wave of a first frequency band;

a second patch antenna electrode formed on the same surface as the first patch antenna electrode apart therefrom in a manner of embracing the first patch antenna electrode, for receiving and transmitting a radio wave of a second frequency band lower than the first frequency band;

a first feeding line electrode electromagnetically connected to the first patch antenna electrode;

a second feeding line electrode electromagnetically connected to the second patch antenna electrode;

a first feeding terminal electrode formed on a lateral side of the dielectric block and connected to the first feeding line electrode; and

a second feeding terminal electrode formed on a lateral side different from the side of the first feeding terminal electrode and connected to the second feeding line electrode.

16. The multiple-resonant antenna, according to claim 15, wherein

the height of the first feeding line electrode from the bottom is equal to that of the second feeding line electrode from the bottom.

17. The multiple-resonant antenna, according to claim 15, wherein

the first patch antenna electrode and the second patch antenna electrode are patch antennas for circularly polarized wave.

18. The multiple-resonant antenna, according to claim 17, wherein

a cut-off portion is provided on one portion of the first patch antenna electrode.

19. The multiple-resonant antenna, according to claim 15, comprising a second feeding line electrode formed on the same surface of the dielectric block as the second patch antenna electrode and electromagnetically connected to the second patch antenna electrode with a space.

20. The multiple-resonant antenna, according to claim 15, wherein

the second feeding terminal electrode serves as a fixing terminal at a surface mounting time.

21. The multiple-resonant antenna, according to claim 15, wherein

the dielectric block has a square horizontal cross section.

22. A multiple-resonant antenna comprising:

a dielectric block;

a first patch antenna electrode formed on one main surface of the dielectric block, for receiving and transmitting a radio wave of a first frequency band;

a second patch antenna electrode formed on the same surface as the first patch antenna electrode apart from the first patch antenna electrode in a manner of embracing the first patch antenna electrode, for receiving and transmitting a radio wave of a second frequency band lower than the first frequency band;

a feeding line electrode electromagnetically connected to the first patch antenna electrode; and

a feeding terminal electrode formed on a lateral side of the dielectric block and connected to the first feeding line electrode.

23. The multiple-resonant antenna, according to claim 22, wherein

the dielectric block has a square horizontal cross section.

24. A multiple-resonant antenna comprising:

a dielectric block;

a first patch antenna electrode formed on one main surface of the dielectric block, for receiving and transmitting a radio wave of a first frequency band;

a second patch antenna electrode formed on the main surface of the dielectric block apart from the first patch antenna in a manner of embracing the first patch antenna electrode, for receiving and transmitting a radio wave of a second frequency band lower than the first frequency band;

a third patch antenna electrode formed on the main surface of the dielectric block apart from the second patch antenna electrode in a manner of embracing the second patch antenna electrode, for receiving and transmitting a radio wave of a third frequency band lower than the second frequency band;

a first feeding line electrode electromagnetically connected to the first patch antenna electrode;

a second feeding line electrode electromagnetically connected to the second patch antenna electrode;

a third feeding line electrode electromagnetically connected to the third patch antenna electrode;

a first feeding terminal electrode connected to the first feeding line electrode;

a second feeding terminal electrode connected to the second feeding line electrode; and

a third feeding terminal electrode connected to the third feeding line electrode.

25. The multiple-resonant antenna, according to claim 24, wherein the dielectric block has a square horizontal cross section.

26. The multiple-resonant antenna, according to claim 24, comprising a feeding line electrode electromagnetically connected to the first patch antenna electrode and the third patch antenna electrode and a feeding terminal electrode connected to the feeding line electrode.

27. The multiple-resonant antenna, according to claim 24, comprising a feeding line electrode electromagnetically connected to the first and the second patch antenna electrodes.

28. The multiple-resonant antenna, according to claim 24, comprising a feeding line electrode electromagnetically connected to the second and the third patch antenna electrodes.

29. The multiple-resonant antenna, according to claim 24, comprising a feeding line electrode electromagnetically connected to the first, the second, and the third patch antenna electrodes.

30. The multiple-resonant antenna, according to claim 24, wherein the third feeding terminal electrode serves as a fixing terminal at a surface mounting time.

31. A multiple-resonant antenna comprising:

a dielectric block;

a first patch antenna electrode formed on one main surface of the dielectric block, for receiving and transmitting a radio wave of a first frequency band;

a second patch antenna electrode formed on the main surface of the dielectric block apart from the first patch antenna in a manner of embracing the first patch antenna electrode, for receiving and transmitting a radio wave of a second frequency band lower than the first frequency band;

a third patch antenna electrode formed on the main surface of the dielectric block apart from the second patch antenna electrode in a manner of embracing the second patch antenna electrode, for receiving and transmitting a radio wave of a third frequency band lower than the second frequency band;

a fourth patch antenna electrode formed on the main surface of the dielectric block apart from the third patch antenna electrode in a manner of embracing the third patch antenna electrode, for receiving and transmitting a radio wave of a fourth frequency band lower than the third frequency band;

a first feeding line electrode electromagnetically connected to the first patch antenna electrode;

a second feeding line electrode electromagnetically connected to the second patch antenna electrode;

a third feeding line electrode electromagnetically connected to the third patch antenna electrode;

a fourth feeding line electrode electromagnetically connected to the fourth patch antenna electrode;

a first feeding terminal electrode formed on a lateral side of the dielectric block and connected to the first feeding line electrode;

a second feeding terminal electrode formed on a lateral side different from the side of the first feeding terminal electrode and connected to the second feeding line electrode;

a third feeding terminal electrode formed on a lateral side different from the sides of the first and the second feeding terminal electrodes and connected to the third feeding line electrode; and

a fourth feeding terminal electrode formed on a lateral side different from the sides of the first, the second, and the third feeding terminal electrodes and connected to the fourth feeding line electrode.

32. The multiple-resonant antenna, according to claim 31, wherein

the fourth feeding terminal electrode serves as a fixing terminal at a surface mounting time.

33. The multiple-resonant antenna, according to claim 31, wherein

the dielectric block has a square horizontal cross section.

34. A multiple-resonant antenna comprising:

a dielectric block;

a first patch antenna electrode formed on one main surface of the dielectric block, for receiving and transmitting a radio wave of a first frequency band;

a second patch antenna electrode formed on the main surface of the dielectric block apart from the first patch antenna electrode in a manner of embracing the first patch antenna electrode, for receiving and transmitting a radio wave of a second frequency band lower than the first frequency band;

a first feeding pin connected to the first patch antenna electrode in a manner of piercing the dielectric block in a thickness direction;

a second feeding line electrode electromagnetically connected to the second patch antenna electrode and formed on a top surface or an inner layer of the dielectric block; and

a second feeding terminal electrode formed on a lateral side of the dielectric block and connected to the second feeding line electrode.

35. The multiple-resonant antenna, according to claim 34, wherein

the dielectric block is formed by a multi-layer substrate and the feeding pin electrode is formed by a through hole piercing the multi-layer substrate in a thickness direction.

36. The multiple-resonant antenna, according to claim 34, wherein

the second feeding terminal electrode serves as a fixing terminal at a surface mounting time.

37. The multiple-resonant antenna, according to claim 34, wherein

the dielectric block has a square horizontal cross section.

38. An antenna module comprising a multiple-resonant antenna including a dielectric block, a plurality of patch antenna electrodes formed on one main surface of the dielectric block, at least one feeding terminal electrode formed on a lateral side of the dielectric block, and at least one feeding line electrode connected to the feeding terminal electrode so as to be electromagnetically connected to the patch antenna electrode, a circuit substrate on which the multiple-resonant antenna is mounted, and an antenna cover for covering the multiple-resonant antenna.

39. A radio device wherein a multiple-resonant antenna comprising a dielectric block, a plurality of patch antenna electrodes formed on one main surface of the dielectric block, at least one feeding terminal electrode formed on a lateral side of the dielectric block, and at least one feeding line electrode connected to the feeding terminal electrode so as to be electromagnetically connected to the patch antenna electrode, is formed on a substrate and the multiple-resonant antenna is connected to a radio circuit.