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介绍了一种基于内匹配功率管的Wilkinson微带功率分配器设计新思路。传统Wilkinson微带功率分配器在低频段体积大,用于内匹配功率管时很难在规定的尺寸范围内使用,采用高介电常数陶瓷基片辐射损耗大,直流转换效率低。适当引入不连续性,提高端口阻抗值,端口阻抗引入的虚部参与后续匹配网络的新型Wilkinson微带功率分配器,与传统Wilkinson功率分配器相比,体积更小,效率更高,有很好的实用价值。设计的工作频段在5.2～5.8 GHz的Wilkinson微带功率分配器,在整个频带内输出功率大于50 dBm,饱和功率增益高于7 dB,功率附加效率大于30%。
A new design idea of Wilkinson microstrip power splitter based on internal matching power tube is introduced. The traditional Wilkinson microstrip power divider is bulky in the low frequency range and difficult to use within the specified size range for internally matched power tubes. The use of high dielectric constant ceramic substrates results in high radiation losses and low dc conversion efficiency. Proper introduction of discontinuities, increased port impedance values, and imaginary component introduced by port impedance. The new Wilkinson microstrip power splitters participating in subsequent matching networks are smaller, more efficient, and more efficient than conventional Wilkinson power dividers The practical value. The designed Wilkinson microstrip power splitter operating at 5.2-5.8 GHz has output power greater than 50 dBm over the entire frequency band, saturation power gain above 7 dB, and power added efficiency greater than 30%.