金属器件对手机内置不同类型天线性能的影响

为研究当今移动终端金属器件对内置多频天线电磁特性的影响,提出平面倒F(planar inverted F antenna,PIFA)、单极、低温共烧陶瓷(low temperature co-fired ceramic,LTCC)在直板手机模式下,重点从天线的谐振频率、带宽和增益3个参数角度出发,分别研究了金属器件:扬声器、电池与3种不同类型天线的相对关系,以及对天线性能的影响。总结出3种不同类型的内置手机天线对终端环境的抗干扰特性。综合结果表明,PIFA、单极、LTCC天线的抗干扰特性依次增强;制作的实际模型与测试验证的仿真结果基本吻合。

Effects of metal components on performance of internal different types of antennal performance

For the study of the effects between metal components and internal antenna of the mobile terminal, three types of dual-band antennas, including PIFA, monopole and LTCC, are presented, and the effects on their performance of the relative position of the antennas to the metal components(speaker and battery)in a bar phone are researched. Resonant frequency, bandwidth and gain are shown in different relative position between metal components and internal antenna. The anti-jamming characteristics of these antennas are summarized in this paper. According to the comprehensive results, the anti-jamming characteristics of PIFA, monopole and LTCC antenna are progressively enhanceed. Furthermore, the measurement result is better consistent with simulation result.