| 摘要 |
A flat antenna device is proposed, including a substrate having a first surface and a second surface, a first. antenna module disposed on the first surface and having a first coupling unit, and a second antenna module disposed on the second surface and having a second coupling unit. The first and second coupling units are parallel and coupled to one another so as to constitute a transmission line structure, allowing signals passing through the first coupling unit to be coupled and fed into the second coupling unit such that a first resonant signal and a second resonant signal of approximately 910 MHz and 1710 MHz are generated through the transmission line structure and a hook-shaped radiation unit of the second antenna module and a third resonant signal of approximately 2400 MHz is generated through an open electromagnetic coupling groove formed in the second module, thereby providing a compact and low-cost flat antenna device for use with six commonly used frequency bands of GSM, GPS, DCS, PCS, UMTS and WLAN IEEE-802.11b/g/n.
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