An X-band GaN combined solid-state power amplifier

An X-band GaN combined solid-state power amplifier
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X波段GaN组合固态功率放大器

DOI:
10.1088/1674-4926/30/9/095001
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发表时间:
2009-09
期刊:
半导体学报
影响因子:
--
通讯作者:
郝跃
郝跃
中科院分区:
其他
文献类型:
--
作者:
胡仕刚;杨林安;冯辉;段焕涛;陈炽;马晓华;郝跃

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基于自主研发的2.5mm栅宽AlGaN/GaNHEMT工艺,在SiC衬底上制作了X波段GaN组合固态功率放大模块。该模块由AlGaN/GaN HEMT、威尔金森功率耦合器、直流偏置电路和微带线组成。对于每个放大器,我们使用双极性直流电源。在输入端和输出端采用特殊的RC网络,在输入端的直流电源和晶体管栅极之间采用电阻,以消除各放大器的自激振荡和低频串扰。同时,设计了长度为3λ/4的威尔金森功率耦合器分支,以消除两个放大器的自激振荡。微带短截线用于输入匹配和输出匹配。在Vds = 27 V,Vgs = -4.0 V,8 GHz连续波工作条件下,放大器模块的线性增益为5.6 dB,功率附加效率为23.4%,输出功率为41.46 dBm(14 W),功率增益压缩为3 dB。在8 ~ 8.5GHz范围内,输出功率的变化小于1.5dB。
Based on a self-developed AlGaN/GaN HEMT with 2.5 mm gate width technology on a SiC substrate, an X-band GaN combined solid-state power amplifier module is fabricated. The module consists of an AlGaN/GaN HEMT, Wilkinson power couplers, DC-bias circuit and microstrip line. For each amplifier, we use a bipolar DC power source. Special RC networks at the input and output and a resistor between the DC power source and the gate of the transistor at the input are used for cancellation of self-oscillation and crosstalk of low-frequency of each amplifier. At the same time, branches of length 3λ/4 for Wilkinson power couplers are designed for the elimination of self-oscillation of the two amplifiers. Microstrip stub lines are used for input matching and output matching. Under Vds = 27 V, Vgs = –4.0 V, CW operating conditions at 8 GHz, the amplifier module exhibits a line gain of 5.6 dB with power added efficiency of 23.4%, and output power of 41.46 dBm (14 W), and the power gain compression is 3 dB. Between 8 and 8.5 GHz, the variation of output power is less than 1.5 dB.
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