Department of Electronics Engineering, Konkuk University, Korea.
PLoS One. 2018 Sep 18;13(9):e0203041. doi: 10.1371/journal.pone.0203041. eCollection 2018.
A new dual-state impedance matching scheme for a microwave driven plasma lamp using a solid-state power amplifier (SSPA) is presented. The impedance of the plasma lamp depends on the amount of input radio frequency (RF) energy, and therefore has very different values for hot and cold states. First, a method for effectively modeling the electrical characteristics of a plasma lamp that depends on RF power has been proposed. Second, a new technique has been proposed to achieve dual-state impedance matching for two state impedances at two very close frequencies using a T-shaped matching network with two section shunt stub and additional transmission line. The proposed method can achieve dual state impedance matching in two frequency bands located very closely when compared to the conventional methods. The accuracy of the proposed model and the effectiveness of the proposed dual-state matching are verified via a plasma lamp system with a 2.45 GHz 300 W GaN SSPA.
提出了一种使用固态功率放大器 (SSPA) 为微波驱动等离子灯的新双态阻抗匹配方案。等离子灯的阻抗取决于输入射频 (RF) 能量的多少，因此在热态和冷态下具有非常不同的数值。首先，提出了一种有效建模等离子灯的电气特性的方法，该方法取决于 RF 功率。其次，提出了一种新的技术，使用具有两个部分并联短截线和附加传输线的 T 形匹配网络，在两个非常接近的频率下实现了两个状态阻抗的双态阻抗匹配。与传统方法相比，所提出的方法可以在两个非常接近的频带中实现双状态阻抗匹配。通过使用 2.45GHz300WGaNSSPA 的等离子灯系统验证了所提出的模型的准确性和所提出的双态匹配的有效性。
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