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Multimode multiband power amplifier with tapped transformer for efficiency enhancement in low power mode

机译:具有抽头变压器的多模多频带功率放大器,可在低功率模式下提高效率

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Multimode multiband connectivity has become a defacto requirement for smartphones with 3G WCDMA/4G LTE applications. In this research, a two-stage multimode multiband (MMMB) power amplifier (PA) with multiple gated transistor (MGTR) and configurable tapped transformer is designed and analysed in view of enhancing the efficiency in low power mode. The designed MMMB PA offers a 900MHz of operating bandwidth starting from the frequency of 1400MHz up to 2300MHz, covering 16 LTE FDD bands with peak output power of 27.8dBm and peak PAE of 31% in the high power mode. In low power mode, the PA offers the same bandwidth with peak output power of 25.5dBm and PAE of 30%. Use of the multiple gated transistor with tapped transformer for matching has increased the PAE in low power mode by 19% compared with that PAE in the high power mode.
机译:对于具有3G WCDMA / 4G LTE应用的智能手机,多模式多频段连接已成为事实上的要求。在这项研究中,设计并分析了具有多栅极晶体管(MGTR)和可配置抽头变压器的两级多模多频带(MMMB)功率放大器(PA),以提高低功率模式下的效率。设计的MMMB PA可提供900MHz的工作带宽,从1400MHz到2300MHz的频率,涵盖16个LTE FDD频段,在高功率模式下的峰值输出功率为27.8dBm,峰值PAE为31%。在低功率模式下,PA提供相同的带宽,峰值输出功率为25.5dBm,PAE为30%。与高功率模式下的PAE相比,使用带有抽头变压器的多栅极晶体管进行匹配使低功率模式下的PAE增加了19%。

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