| 摘要 |
The present disclosure provides a multi-antenna mobile phone data card and method for reducing a specific absorption rate, where the data card includes: a radio frequency (RF) substrate, antennas configured to transmit and receive signals, and a feed source, connected between the RF substrate and the antennas, configured to excite the antennas, the RF substrate has a rectangular shape, and the feed source is arranged at a first corner of the RF substrate, a first hollow portion is arranged at a second corner which is adjacent to the first corner and is located on a short side of the RF substrate on which the first corner is located, the first hollow portion is provided with a first metal strip, the first metal strip has an end connected with the short side, and another end as a free end, a first electrical length formed from the feed source to the free end of the first metal strip is equal to a second electrical length formed from the feed source to another short side along a long side on which the first corner is located. According to the present disclosure, through the method of changing the shape of the RF substrate, the same electrical lengths is obtained from the feed source respectively to several edge points on the RF substrate, and thus reducing the current peak and the SAR value on the RF substrate and saving the structure space, thereby reducing the radiation hazard of the data card to the human body. |
