Dual band built-in antenna device and mobile wireless terminal equipped therewith
First Claim
1. A dual band built-in antenna device operable in a first frequency band and a second frequency band comprising:
- a ground plane comprising a ground member;
a first inverted-L line antenna element for said first frequency band; and
a second inverted-L line antenna element for said second frequency band;
wherein said first and second inverted-L line antenna elements are so constructed that the elements are extended to respective directions that are further separated from each other as the antenna elements extend further from a starting position set in proximity to a power feed point within a plane parallel to said ground plane.
1 Assignment
0 Petitions
Accused Products
Abstract
A dual band built-in antenna device operable in a first frequency band and a second frequency band is provided. The antenna device comprises a ground plane comprising a ground member, a first inverted-L line antenna element for the first frequency band, and a second inverted-L line antenna element for the second frequency band. The first and second inverted-L line antenna elements are so constructed that the elements are extended to respective directions that are further separated from each other as the antenna elements extend further from a starting position set in proximity to a power feed point within a plane parallel to the ground plane.
-
Citations
20 Claims
-
1. A dual band built-in antenna device operable in a first frequency band and a second frequency band comprising:
-
a ground plane comprising a ground member;
a first inverted-L line antenna element for said first frequency band; and
a second inverted-L line antenna element for said second frequency band;
whereinsaid first and second inverted-L line antenna elements are so constructed that the elements are extended to respective directions that are further separated from each other as the antenna elements extend further from a starting position set in proximity to a power feed point within a plane parallel to said ground plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
said power feed point is disposed at a position corresponding to a corner of a substantially rectangular antenna element disposition region in which said first and second inverted-L line antenna elements are disposed thereon. -
3. The dual band built-in antenna device according to claim 1, wherein
said power feed point is disposed at a position corresponding to a middle part in a transverse direction of a substantially rectangular antenna element disposition region in which said first and second inverted-L line antenna elements are disposed thereon. -
4. The dual band built-in antenna device according to claim 1, further comprising:
-
a plane facing to said ground plane in which said first and second inverted-L line antenna elements are disposed thereon, wherein said plane is slanted toward said ground plane, and at least one of open ends of said first and second inverted-L line antenna elements is being terminated at a position on said plane, said point being comparatively longer distance from said ground plane.
-
-
5. The dual band built-in antenna device according to claim 4, wherein
one of the open ends of said first and second inverted-L line antenna elements is terminated on said plane at a position locating at a comparatively longer distance from said ground plane, and the other open end of said first and second inverted-L line antenna elements is terminated on said plane at a position locating at a comparatively shorter distance from said ground plane. -
6. The dual band built-in antenna device according to claim 1, wherein
an external antenna connector is disposed at a part devoid of radiation conductor, the part being located in between said first and second inverted-L line antenna elements. -
7. The dual band built-in antenna device according to claim 1, wherein
a nonconductive component part is disposed between either antenna element of said first or second inverted-L line antenna element and said ground member. -
8. The dual band built-in antenna device according to claim 1, further comprising:
-
a power feed conductor being coupled to said power feed point, wherein portions of said first and second inverted-L line antenna elements disposed on a plane substantially parallel to said ground plane are connected to said power feed point.
-
-
9. The dual band built-in antenna device according to claim 1, further comprising:
-
a first and a second power feed conductors being coupled to a first and a second power feed point respectively, wherein said first and second inverted-L line antenna elements disposed on a plane substantially parallel to said ground plane have respective end portions that are connected to said first and second power feed points, respectively.
-
-
10. The dual band built-in antenna device according to claim 1, further comprising:
a matching circuit being shared with said first and second inverted-L line antenna elements.
-
-
11. A mobile wireless terminal apparatus having a dual band built-in antenna device operable in a first frequency band and a second frequency band, said mobile wireless terminal apparatus comprising:
-
a ground plane comprising a ground member;
a first inverted-L line antenna element for said first frequency band; and
a second inverted-L line antenna element for said second frequency band;
whereinsaid first and second inverted-L line antenna elements are so constructed that the elements are extended to respective directions that are further separated from each other as the antenna elements extend further from a starting position set in proximity to a power feed point within a plane parallel to said ground plane. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
said power feed point is disposed at a position corresponding to a corner of a substantially rectangular antenna element disposition region in which said first and second inverted-L line antenna elements are disposed thereon. -
13. The mobile wireless terminal apparatus according to claim 11, wherein
said power feed point is disposed at a position corresponding to a middle part in a transverse direction of a substantially rectangular antenna element disposition region in which said first and second inverted-L line antenna elements are disposed thereon. -
14. The mobile wireless terminal apparatus according to claim 11, further comprising:
-
a plane facing to said ground plane in which said first and second inverted-L line antenna elements are disposed thereon, wherein said plane is slanted toward said ground plane, and at least one of open ends of said first and second inverted-L line antenna elements is being terminated at a position on said plane, said point being comparatively longer distance from said ground plane.
-
-
15. The mobile wireless terminal apparatus according to claim 14, wherein
one of the open ends of said first and second inverted-L line antenna elements is terminated on said plane at a position locating at a comparatively longer distance from said ground plane, and the other open end of said first and second inverted-L line antenna elements is terminated on said plane at a position locating at a comparatively shorter distance from said ground plane. -
16. The mobile wireless terminal apparatus according to claim 11, wherein
an external antenna connector is disposed at a part devoid of radiation conductor, the part being located in between said first and second inverted-L line antenna elements. -
17. The mobile wireless terminal apparatus according to claim 11, wherein
a nonconductive component part is disposed between either antenna element of said first or second inverted-L line antenna element and said ground member. -
18. The mobile wireless terminal apparatus according to claim 11, further comprising:
-
a power feed conductor being coupled to said power feed point, wherein portions of said first and second inverted-L line antenna elements disposed on a plane substantially parallel to said ground plane are connected to said power feed point.
-
-
19. The mobile wireless terminal apparatus according to claim 11, further comprising:
-
a first and a second power feed conductors being coupled to a first and a second power feed point respectively, wherein said first and second inverted-L line antenna elements disposed on a plane substantially parallel to said ground plane have respective end portions that are connected to said first and second power feed points, respectively.
-
-
20. The mobile wireless terminal apparatus according to claim 11, further comprising:
a matching circuit being shared with said first and second inverted-L line antenna elements.
-
Specification