Antenna device and wireless apparatus
View Patent ↗An antenna device includes a ground plane; a first resonator extending in a direction at a distance from the ground plane and connected to a feeding point; and a second resonator arranged at a distance from the first resonator. The ground plane includes an edge portion formed along the second resonator, with a resonance current being formed on the first resonator and the ground plane. The second resonator is configured to function as a radiation conductor by resonance of the first resonator. A tip portion of the first resonator is located near a metallic part. The second resonator has a plurality of electrical lengths of differing resonance frequencies.
1. An antenna device, comprising:
a ground plane;
a first resonator extending in a direction at a distance from the ground plane and connected to a feeding point; and
a second resonator positioned at a distance from the first resonator,
wherein the ground plane includes an edge portion formed along the second resonator, such that a resonance current is formed on the first resonator and the ground plane, the second resonator is configured to function as a radiation conductor by resonance of the first resonator, a tip portion of the first resonator is positioned near a metallic part, the second resonator has a plurality of electrical lengths with differing resonance frequencies and has a plurality of radiating elements including a first radiating element and a second radiating element, and the second radiating element includes a turnaround portion formed between the first radiating element and the ground plane and not formed between the first resonator and the ground plane when viewed from a direction perpendicular to the ground plane.
2. The antenna device according to claim 1 , wherein the first radiating element has a conductor portion that extends along a conductor portion of the second radiating element.
3. The antenna device according to claim 2 , wherein the first resonator has an inverted-F shape.
4. The antenna device according to claim 2 , wherein the first resonator is formed between the second resonator and the metallic part.
5. The antenna device according to claim 1 , wherein an entire length of the second radiating element is greater than an entire length of the first radiating element.
6. The antenna device according to claim 5 , wherein the first radiating element has a conductor portion that extends along a conductor portion of the second radiating element.
7. The antenna device according to claim 5 , wherein the first resonator has an inverted-F shape.
8. The antenna device according to claim 5 , wherein the first resonator is formed between the second resonator and the metallic part.
9. The antenna device according to claim 1 , wherein the second resonator has a radiating element that branches.
10. The antenna device according to claim 1 , wherein the first resonator has an inverted-F shape.
11. The antenna device according to claim 1 , wherein the first resonator is formed between the second resonator and the metallic part.
12. The antenna device according to claim 1 , wherein the metallic part is a display or a shield plate.
13. A wireless apparatus, comprising:
a metallic part; and
an antenna device comprising a ground plane, a first resonator extending in a direction at a distance from the ground plane and connected to a feeding point, and a second resonator positioned at a distance from the first resonator,
wherein the ground plane includes an edge portion formed along the second resonator such that a resonance current is formed on the first resonator and the ground plane, the second resonator is configured to function as a radiation conductor by resonance of the first resonator, a tip portion of the first resonator is positioned near the metallic part, the second resonator has a plurality of electrical lengths with differing resonance frequencies and has a plurality of radiating elements including a first radiating element and a second radiating element, and the second radiating element includes a turnaround portion formed between the first radiating element and the ground plane and not formed between the first resonator and the ground plane when viewed from a direction perpendicular to the ground plane.
14. The wireless apparatus according to claim 13 , wherein the first radiating element has a conductor portion that extends along a conductor portion of the second radiating element.
15. The wireless apparatus according to claim 13 , wherein an entire length of the second radiating element is greater than an entire length of the first radiating element.
16. The wireless apparatus according to claim 15 , wherein the first radiating element has a conductor portion that extends along a conductor portion of the second radiating element.
17. The wireless apparatus according to claim 13 , wherein the second resonator has a radiating element that branches.
18. The wireless apparatus according to claim 13 , wherein the first resonator has an inverted-F shape.
19. The wireless apparatus according to claim 13 , wherein the first resonator is formed between the second resonator and the metallic part.
20. The wireless apparatus according to claim 13 , wherein the metallic part is a display or a shield plate.