| 摘要 |
A multi-band radio antenna device for a radio communication terminal includes an integral feed and ground structure electrically connected to a first radiating antenna element and a second radiating antenna element. The first radiating antenna element includes a first continuous trace of conductive material, wherein the first continuous trace has a first branch tuned to radiate at first frequencies in a first frequency band, and a second branch, which is tuned to radiate in a second frequency band at second frequencies approximately equal to or greater than two times the first frequencies. The said second radiating antenna element has a second continuous trace of conductive material, wherein the second continuous trace has a third branch capacitively coupled to the second branch. Such an antenna device is suitable for built-in antennas, at the same time having a wide high-frequency band bandwidth, which enables the antenna to be operable at a number of frequency bands.
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