Wideband antenna
A wideband antenna for a wireless communication device includes a grounding element, a radiating element, extending in a first direction, for transmitting and receiving wireless signals, a feed-in terminal electrically connected to the radiating element, for transmitting a feed-in signal to the radiating element, and a first parasitic radiating element, extending in the first direction, having a side separated from a side of the radiating element by a first distance, and another side separated from the grounding element by a second distance. The first distance allows the first parasitic radiating element and the radiating element to generate a coupling effect to form a slot antenna for transmitting and receiving wireless signals, and the second distance allows the first parasitic radiating element and the grounding element to generate a coupling effect to form a coupling path to the grounding element to increase bandwidth.
1. A wideband antenna for a wireless communication device, comprising:
a grounding element;
a radiating element, extending in a first direction, for transmitting and receiving wireless signals;
a feed-in terminal electrically connected to the radiating element, for transmitting a feed-in signal to the radiating element; and
a first parasitic radiating element, extending in the first direction, having a side separated from a side of the radiating element by a first distance, and another side separated from the grounding element by a second distance, and the feed-in terminal and the grounding element are substantially separated by at least the first parasitic radiating element;
wherein the first distance allows the first parasitic radiating element and the radiating element to generate a coupling effect to form a slot antenna for transmitting and receiving wireless signals, and the second distance allows the first parasitic radiating element and the grounding element to generate a coupling effect to form a coupling path to the grounding element to increase bandwidth.
2. The wideband antenna of claim 1 , further comprising a connection element electrically connected to the first parasitic radiating element, extending in a second direction, and having a side separated from another side of the radiating element by a designated distance, the designated distance allowing the connection element and the radiating element to generate a coupling effect.
3. The wideband antenna of claim 2 , wherein the connection element further electrically connects to the grounding element.
4. The wideband antenna of claim 2 , wherein the second direction is substantially perpendicular to the first direction.
5. The wideband antenna of claim 1 , further comprising a second parasitic radiating element in parallel with the first parasitic radiating element.
6. The wideband antenna of claim 2 , further comprising a matching element electrically connected to the connection element.
7. The wideband antenna of claim 1 , further comprising a matching circuit electrically connected between the radiating element and the first parasitic radiating element.
8. The wideband antenna of claim 1 , further comprising a metal frame, having a side separated from another side of the radiating element relative to the first parasitic radiating element by a designated distance, the designated distance allowing the metal frame and the radiating element to generate a coupling effect to increase bandwidth.
9. The wideband antenna of claim 8 , wherein the metal frame is a part of a housing of the wireless communication device.
10. The wideband antenna of claim 8 , wherein the metal frame further electrically connects to the grounding element.
11. The wideband antenna of claim 8 , further comprising a connection element electrically connected between the grounding element and the metal frame.