| 摘要 |
The present invention provides a miniature, built-in multi-band antenna which is suitable for use in future compact mobile terminals. According to exemplary embodiments, a semi built-in printed antenna is provided which includes patch elements of different sizes and capable of being tuned to different frequency bands. An internal patch element is located on a printed circuit board (PCB) within a communication device and another patch element is located outside the PCB. On each patch element is formed a slot which divides the patch element into sub-parts. Each sub-part of the internal patch element is structured so as to be resonant at a frequency in the same frequency band to which the internal patch element is tuned. Each sub-part of the external patch element is similarly structured but having a resonance with a larger bandwidth than the internal patch element and at a frequency band to which the external patch element is tuned. As a result, a high efficiency, broad band, multi-band, and surface mountable low profile antenna can be realized.
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