ANTENNA DEVICE AND ELECTRONIC DEVICE USING THE SAME
A Planar Inverted-F antenna (PIFA) device includes a circuit board having a first surface, a second surface, and a through hole, an antenna being disposed in the first surface, and a metal member being disposed in the second surface. The through hole is connected between the first surface and the second surface. The antenna couples with the metal member to have a specific capacitive coupling effect through the through hole to enable transmission and reception of specific wireless frequencies by an electronic device having the PIFA.
1 . An antenna device comprising:
a circuit board comprising a first surface, a second surface, and a through hole, the first surface being opposite to the second surface, wherein the through hole connected between the first surface and the second surface;
an antenna disposed on the first surface; and
a metal member disposed on the second surface;
wherein the antenna is capacitively coupled to the metal member through the through hole.
2 . The antenna device of claim 1 , wherein the first surface is parallel to the second surface, and the antenna is parallel to the metal member in the transverse direction.
3 . The antenna device of claim 2 , wherein a first terminal of the antenna is grounded, the first terminal of the antenna is electrically coupled to a signal source, a second terminal of the antenna is electrically coupled to a first terminal of the metal member through a capacitor, and a second terminal of the metal member is grounded.
4 . The cleaning device of claim 3 , wherein a length of the circuit board is about 90 mm.
5 . The cleaning device of claim 4 , wherein a height of the circuit board is about 0.4 mm.
6 . The cleaning device of claim 5 , wherein a width of the circuit board is about 50 mm.
7 . The cleaning device of claim 6 , wherein a dielectric constant of the circuit board is about 4.4.
8 . An antenna device comprising:
a circuit board comprising a first surface, a second surface, and a through hole, the first surface being opposite to the second surface, wherein the through hole connected between the first surface and the second surface;
an antenna disposed on the first surface; and
a metal member disposed on the second surface;
wherein the first surface is parallel to the second surface, and the antenna is parallel to the metal member in the transverse direction; wherein the antenna is capacitively coupled to the metal member through the through hole.
9 . The antenna device of claim 8 , wherein a first terminal of the antenna is grounded, the first terminal of the antenna is electrically coupled to a signal source, a second terminal of the antenna is electrically coupled to a first terminal of the metal member through a capacitor, and a second terminal of the metal member is grounded.
10 . The cleaning device of claim 9 , wherein a length of the circuit board is about 90 mm.
11 . The cleaning device of claim 10 , wherein a height of the circuit board is about 0.4 mm.
12 . The cleaning device of claim 11 , wherein a width of the circuit board is about 50 mm.
13 . The cleaning device of claim 12 , wherein a dielectric constant of the circuit board is about 4.4.
14 . An electronic device comprising an antenna device and a housing, the antenna device disposed in the housing, the antenna device comprising:
a circuit board comprising a first surface, a second surface, and a through hole, the first surface being opposite to the second surface, wherein the through hole connected between the first surface and the second surface;
an antenna disposed on the first surface; and
a metal member disposed on the second surface;
wherein the first surface is parallel to the second surface, and the antenna is parallel to the metal member in the transverse direction;
wherein the antenna is capacitively coupled to the metal member through the through hole.
15 . The electronic device of claim 14 , wherein a first terminal of the antenna is grounded, the first terminal of the antenna is electrically coupled to a signal source, a second terminal of the antenna is electrically coupled to a first terminal of the metal member through a capacitor, and a second terminal of the metal member is grounded.
16 . The electronic device of claim 15 , wherein a length of the circuit board is about 90 mm.
17 . The electronic device of claim 16 , wherein a height of the circuit board is about 0.4 mm.
18 . The electronic device of claim 17 , wherein a width of the circuit board is about 50 mm.
19 . The electronic device of claim 18 , wherein a dielectric constant of the circuit board is about 4.4.