Wireless communication device
A wireless communication device including an antenna element and a resonant divider is provided. The antenna element has a resonant path so that an operation frequency of the antenna element covers a first band and a second band. The resonant divider is electrically connected to the antenna element and provides a current path connected in parallel with a part of the resonant path. The resonant divider delays a current flowing through the current path so that the antenna element is incapable of covering an interval band between the first band and the second band.
1. A wireless communication device, comprising:
an antenna element, comprising a connection portion and a first extending portion connected with each other, wherein the connection portion has a feed point, the connection portion and the first extending portion form a resonant path, and the antenna element is operated in a first band and a second band through the resonant path; and
a resonant divider, electrically connected in parallel with a part of the first extending portion, and providing a current path connected in parallel with a part of the resonant path, wherein the resonant divider delays a current flowing through the current path, and the antenna element is incapable of being operated in an interval band between the first band and the second band in response to the delay of the current flowing through the current path.
2. The wireless communication device as claimed in claim 1 , wherein the resonant divider comprises a capacitor element.
3. The wireless communication device as claimed in claim 2 , wherein the antenna element is a planar inverted-F antenna, and the antenna element further comprises:
a ground portion, having a first terminal electrically connected to a ground plane,
wherein a first terminal of the connection portion is electrically connected to a second terminal of the ground portion,
a first terminal of the first extending portion is electrically connected to a second terminal of the connection portion, and a second terminal of the first extending portion is an open terminal.
4. The wireless communication device as claimed in claim 3 , wherein the antenna element further comprising:
a second extending portion, having a first terminal electrically connected to the second tenninal of the connection portion, and a second terminal being an open terminal, wherein the antenna element is further operated in a third band through the second extending portion and the connection portion.
5. The wireless communication device as claimed in claim 4 , wherein when a frequency of the third band is lower than frequencies of the first band and the second band, a capacitance of the capacitor element is between 0.1 pF and 3 pF.
6. The wireless communication device as claimed in claim 4 , wherein when a frequency of the third band is greater than frequencies of the first band and the second band, a capacitance of the capacitor element is between 3 pF and 8 pF.
7. The wireless communication device as claimed in claim 1 , wherein a capacitance of the capacitor element is inversely proportional to a frequency of the second band.
8. The wireless communication device as claimed in claim 1 , wherein the antenna element is a planar inverted-F antenna (PIFA), a monopole antenna, a dipole antenna or a loop antenna.