| 摘要: |
| 提出了无断开（闭合）金属边框情况下平面手机天线的模型，解决了在闭
合金属情况下导致的传统平面天线带宽变窄的问题。通过天线折叠技术，将其面积缩小至手
机应用的尺寸内。然后，进一步的阻抗匹配使在smith圆图上将天线的阻抗带宽调到了最
大，使天线能够覆盖GSM850、GSM900、DCS、PCS、UMTS 5个频段。采用开槽天线将金属边框
作为天线的一部分能解决金属框对天线的影响。实测结果表明，低频部分带宽为142 MHz，高
频部分带宽有480 MHz，满足了常用频段的需要。同时，为了避免发生手握的影响，金
属框和地的接地点置于电路基板顶段，从而降低了手握的影响。 |
| 关键词: 手机天线 金属边框 缝隙天线 |
| DOI： |
|
| 基金项目: |
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| A printed slot antenna for mobile phone with unbroken metal frame |
| CAO Rui-xin,YE Ming,NI Yang |
| () |
| Abstract: |
| The model to solve unbroken（closed） metal framed planar han
dset antenna is proposed. This model adopts the slot antenna to solve the narro
w bandwidth caused by unbroken metal frame by the traditional planar antenna. By
further folding, the area of the slot antenna is reduced to be suitable for han
dset. Through impedance matching, the smith chart is properly adjusted to gain t
he widest bandwidth for the band of GSM850,GSM900, DCS,PCS,UMTS. This structure
uses the metal frame as a part of the antenna in order to solve the effect caus
ed by traditional antenna and the metal frame. Test result shows that the bandwi
dth is 142 MHz at the low-band and the bandwidth is 480 MHz at the high
-band, which satisfies the common band for antenna. In order to avoid the hand
effect, the grounding point for the metal frame is set away from the ground. |
| Key words: mobile phone antenna metal frame slot antenna |
