CRLH-TL引领未来多频带小型化低损耗传输新变革

CRLH-TL Leads the Innovation of Future Miniaturized and Low-Loss Transmission

文章从左右手复合传输线(CRLH-TL)的机理出发,以传输特性为依据,阐述了其与传统平面传输线的相位响应区别,揭示了构成的左手传输线(LH-TL)的正向非线性及右手传输线(RH-TL)的负向线性传输特性导致的任意两个频率下四分之波长独特的响应及任意一个频率下的零度响应特征。根据这一原理,论证了不同于传统CRLH-TL而体现高选择性的T形双频带传输线和高设计灵活性的多频带传输网络的优越特性。上述不同结构的传输线分别应用于双频带威尔金森功分器和三频带的吉赛尔功分器两种无源器件的设计,证实了CRLH-TL具有实现多频带、小型化、低损耗传输的优异特性,为CRLH-TL引领未来小型化低损耗传输新变革提供了强有力的理论及实验依据。

Starting from the basic theory of the composite right-and left-handed(CRLH) transmission line(TL), in this paper, the difference in phase response between the CRLH-TL and the conventional TL is analyzed according to the transmission property, which process reveals that the CRLH-TL can realize quarter-wavelength response at two arbitrary frequencies and zero-degree response at one arbitrary frequency because of the positive non-linear and negative linear phase response of the LH-TL and RH-TL, respectively. Based on the two characteristics, a T-type dual-band transmission line and a multi-band transmission network are designed. Different with the pure CRLH-TL, the T-type dual-band TL and multi-band transmission network featuring high selectivity and high design flexibility in introducing additional passbands, respectively. In the meantime, the two structures are also used in the design of dual-band Wilkinson power divider(PD) and tri-band Gysel PD, which shows CRLH-TL has the excellent characteristics in realizing multi-band, miniaturized, and low loss transmission,giving a strong theoretical and experimental basis for CRLH-TL leading the new change of future miniaturized and low-loss transmission.