Wireless communication device and method thereof

A wireless communication device, comprising:

• a system ground plane, comprising a feed point;
• and
• a retractable antenna, electrically connected to the feed point,
• wherein when the retractable antenna is configured to be a first length, the wireless communication device transceives a first signal of a first bandwidth range through the retractable antenna for a first radio frequency system, and when the retractable antenna is configured to be a second length, the wireless communication device transceives the first signal of the first bandwidth range and a second signal of a second bandwidth range through the retractable antenna respectively for the first radio frequency system and a second radio frequency system,
• wherein the first signal and the second signal are directly fed into the wireless communication device through the feed point, a center frequency of the first bandwidth range is substantially a first odd multiple of a reference frequency, and a center frequency of the second bandwidth range is substantially a second odd multiple of the reference frequency, wherein the first odd multiple is different to the second odd multiple.