ABSTRACT

This paper presents a new diplexer design of a new-coupled composite right/left-handed (CRLH) resonator to serve the LTE applications. The realization of the diplexer is designed as coupled two zeroth order π-CRLH resonators to represent with zero electrical length and hence attaining a significant size reduction. The filters are designed to achieve a desired frequency bandwidth of 4% ∼16.7 Q-factor and ∼0.066 coupling coefficient at a centre frequency of 2.1 and 2.6 GHz with transmission zeros. The diplexer exhibits a rejection level of 15–20 dB while maintaining insertion loss of 1 dB for the Tx and Rx bands. The circuit design concepts are verified using equivalent circuit simulations, full electromagnetic simulations and experimental measurements. In conclusion, a good agreement is perceived between the measured and simulated data with size compactness of 30 × 60 mm².

摘要

本文提出了一种新耦合复合右/左手 (CRLH) 谐振器的新型双工器设计，以服务于 LTE 应用。双工器的实现被设计为耦合两个零阶 π-CRLH 谐振器，以表示零电气长度，从而显着减小尺寸。这些滤波器的设计目标是在 2.1 和 2.6 GHz 的中心频率（传输零点）下实现 4% ~16.7 Q 因子和 ~0.066 耦合系数的所需频率带宽。双工器具有 15–20 dB 的抑制水平，同时保持 Tx 和 Rx 频段 1 dB 的插入损耗。使用等效电路仿真、完整电磁仿真和实验测量来验证电路设计概念。综上所述，² .