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A GSMEDGEWCDMA Adaptive Series-LC Matching Network Using RF-MEMS Switches
采用RF-MEMS开关的自适应系列LC匹配网络，提升多频多模移动电话链路质量。
插入损耗0.5dB, 谐波失真<-85dBc@35dBm, EVM<1%@27dBm, 电容调谐比~10
RF-MEMS开关自适应匹配网络多频多模阻抗校正系列LC电路
▸应用RF-MEMS开关构建5位可切换电容阵列，实现高线性、低损耗和大调谐范围
▸采用双极波形最小化RF-MEMS器件的平均偏置电压，减少介质充电效应
▸集成阻抗相位检测器和上下计数器，实现鲁棒的迭代控制
Abstract
To preserve link quality of mobile phones, under
fluctuating user conditions, an adaptively controlled series-LC
matching circuit is presented for multi-band and multi-mode
operation. Following a bottom-up approach, we discuss the design
of an RF-MEMS unit cell for the construction of a 5-bit switched
capacitor array. To reduce dielectric charging of the RF-MEMS
devices their average biasing voltage is minimized by applying
a bipolar waveform with a small high/low duty-cycle obtained
from a high-