【摘要】 研究了一种超小型设备上的双频带天线。该超小型设备的尺寸为30mm×30mm×15mm,其最大边长不到低频所对应波长的十分之一。通过在低频激励地板辐射,在高频激励天线单元辐射的方案,实现了双谐振。同时还采用立体折叠地面方案进一步改进天线的低频性能。结合使用匹配电路,最终实现了GSM900(880~960MHz)和GSM1800(1710~1880 MHz)双频带覆盖。在仿真设计的基础上实际制作了原型天线并进行测量,仿真和测试结果吻合良好。更多还原

【Abstract】 A dual-band antenna for miniature devices with a size 30mm×30mm×15mm is proposed in this paper.The longest dimension of the device is less than one-tenth of a wavelength corresponding to the lowest frequency.The ground and the antenna are designed to support the low band mode and the high band mode respectively.By adopting folded and divided ground,the performance at the low band is improved.With the assistance of a matching circuit,a dual-band GSM900(880～960 MHz)and GSM1800(1710～1880 MHz)antenna is eventually achieved.A prototype antenna is fabricated and measured.The simulated and measured results agree well.更多还原