基于槽线的太赫兹同相和反相功分器设计

Design of terahertz in-phase and out-of-phase power divider based on slotline

摘要:

根据接地共面波导(GCPW)和槽线的结构特点，首先设计并仿真验证了一种由接地共面波导到槽线的功分器；然后根据槽线横截面的电场分布特性，设计了一种GCPW-槽线-GCPW结构的同相功分器和反相功分器。仿真结果表明，同相功分器在175~225 GHz范围内的插入损耗优于4 dB，回波损耗优于9.6 dB；反相功分器在185~215 GHz范围内的插入损耗优于4 dB，回波损耗优于10.5 dB，幅度不平衡度小于0.24 dB，相位不平衡度小于1.3°。相比其他太赫兹功分器，本文设计的功分器在插入损耗和回波损耗相当的情况下，具有更简单、紧凑和易于集成的结构。

Abstract:

A Grounded Coplanar Waveguide(GCPW) to slotline power divider is firstly built and verified based on the structural properties of both the GCPW and the slotline. Then an in-phase power divider and an out-of-phase power divider based on a GCPW-slotline-GCPW structure are designed according to the electric field distribution characteristics of the cross-section of the slotline. The simulation results show that the insertion loss of the in-phase power divider is better than 4 dB and the return loss is better than 9.6 dB in the range of 175~225 GHz; the insertion loss of the out-of-phase power divider is better than 4 dB and the return loss is better than 10.5 dB in the range of 185~215 GHz, and the amplitude imbalance is less than 0.24 dB and the phase imbalance is less than 1.3°. Compared to other terahertz power dividers, the power dividers presented in this study are simpler, more compact, and easier to integrate, with comparable insertion and return losses.