为解决传统功率放大器在管壳外部进行谐波匹配,导致谐波短路传输相位不一致和谐波、基波匹配电路互相影响的问题,基于0.25μm GaN HEMT工艺,对C波段高效率预匹配功率放大器进行研究。功率放大器管壳内部HEMT输入端采用键合线和瓷片电容...为解决传统功率放大器在管壳外部进行谐波匹配,导致谐波短路传输相位不一致和谐波、基波匹配电路互相影响的问题,基于0.25μm GaN HEMT工艺,对C波段高效率预匹配功率放大器进行研究。功率放大器管壳内部HEMT输入端采用键合线和瓷片电容形成T型匹配网络来提升输入阻抗,以HEMT输出端键合线和瓷片电容分别作为电感和电容进行串联,使HEMT输出端对二次谐波短路,控制器件的电压和电流波形,提高放大器的漏极效率。管壳外部利用微带线进行阻抗变换,将输入输出阻抗匹配到50Ω。经测试,GaN HEMT功率放大器在5.8 GHz下饱和输出功率、漏极效率和功率增益分别为48.7 dBm、72%和11.3 dB。展开更多
A Ka-band wideband microstrip-to-microstrip(MS-to-MS)vialess vertical transition on slotline multimode resonator(MMR)is presented.The proposed transition mainly consists of a slotline MMR on the common ground plane,an...A Ka-band wideband microstrip-to-microstrip(MS-to-MS)vialess vertical transition on slotline multimode resonator(MMR)is presented.The proposed transition mainly consists of a slotline MMR on the common ground plane,and two microstrip(MS)lines facing each other at the top and third layers in the four-layered liquid crystal polymer(LCP)substrate.In order to improve the bandwidth of the proposed transition,a U-shaped branch is added to the top-and third-layer MS lines,separately.The slotline MMR can be properly excited by setting the position of the U-shaped branch line.As such,a three-pole wideband vertical transition is obtained,which shows a good transmission performance over a wide frequency range of 29.27-39.95 GHz.The three-pole wideband vertical transition based on multilayer LCP substrate is designed,fabricated,and measured.Test results indicate that a wide frequency range of 26.8436.26 GHz can be obtained with return loss better than-10dB and insertion loss less than-3dB.展开更多
基金the Shaanxi Provincial Innovation Team Project(No.2020TD-019)the Xi'an Sciences Plan Project(No.2021XJZZ0075)。
文摘A Ka-band wideband microstrip-to-microstrip(MS-to-MS)vialess vertical transition on slotline multimode resonator(MMR)is presented.The proposed transition mainly consists of a slotline MMR on the common ground plane,and two microstrip(MS)lines facing each other at the top and third layers in the four-layered liquid crystal polymer(LCP)substrate.In order to improve the bandwidth of the proposed transition,a U-shaped branch is added to the top-and third-layer MS lines,separately.The slotline MMR can be properly excited by setting the position of the U-shaped branch line.As such,a three-pole wideband vertical transition is obtained,which shows a good transmission performance over a wide frequency range of 29.27-39.95 GHz.The three-pole wideband vertical transition based on multilayer LCP substrate is designed,fabricated,and measured.Test results indicate that a wide frequency range of 26.8436.26 GHz can be obtained with return loss better than-10dB and insertion loss less than-3dB.
