A single-pole nine-throw antenna switch using radio-frequency microelectromechanical systems technology for broadband multi-mode and multi-band front-ends
A single-pole nine-throw antenna switch using radio-frequency microelectromechanical systems technology for broadband multi-mode and multi-band front-ends
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采用射频微机电系统技术的单刀九掷天线开关，用于宽带多模多频段前端
DOI：
10.1088/0960-1317/18/1/015012
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发表时间：
2007
影响因子：
2.3
通讯作者：
Y. Kwon
中科院分区：
文献类型：
--
作者：
Sanghyo Lee;Jong;Yong;Y. Kwon
本文利用射频（RF）微机电系统（MEMS）技术，演示了一种用于宽带多模式和多频段前端的通用单极九掷（SP9T）开关。为了提高复杂开关所需的均匀性和良率，“无应力”单晶硅系列直流接触MEMS开关已被采用代替金属膜开关。根据第三代合作伙伴计划（3GPP）规范测试，该天线开关的损耗、隔离和线性特性优于传统半导体开关。测量结果表明，从dc到2.17 GHz和21.6 GHz，所有九个路径的插入损耗分别小于0.5 dB和2 dB。2.17 GHz时，所有输入输出和输出输出端口的隔离度均高于49 dB。MEMS开关产生的非线性远低于我们系统设置的测量极限。宽带射频性能，加上优异的线性特性，使这种类型的MEMS开关成为多频段和多模式前端应用的天线开关的有希望的候选者。
In this paper, a generic single-pole nine-throw (SP9T) switch is demonstrated using radio-frequency (RF) microelectromechanical systems (MEMS) technology for broadband multi-mode and multi-band front-ends. In order to improve uniformity and yield required for complex switches, ‘stress-free’ single-crystalline-silicon series dc-contact MEMS switches have been employed instead of metal membrane switches. When tested according to the third-generation partnership project (3GPP) specifications, the antenna switch in this work shows loss, isolation and linearity characteristics better than the conventional semiconductor switches. Measured results showed insertion losses for all nine paths less than 0.5 dB and 2 dB from dc to 2.17 GHz and 21.6 GHz, respectively. Isolations for all input–output and output–output ports are higher than 49 dB at 2.17 GHz. Nonlinearities generated by the MEMS switch were well below the measurement limit of our system setup. The broadband RF performance, together with excellent linearity characteristics, makes this type of MEMS switch a promising candidate for an antenna switch for multi-band and multi-mode front-end applications.