Unequal Bandpass Filtering Power Divider Based on Hybrid HMSIW-SSPP Modes

Bai Cao Pan,Guo Qing Luo,Ya Hui Qian,Ben Jian Guo,Ping Yu

doi:10.3389/fphy.2022.851150

Abstract

This letter presents a novel unequal bandpass filtering power divider based on hybrid-mode of half mode substrate integrated waveguide (HMSIW) and spoof surface plasmon polaritons (SSPPs). Bandpass response is achieved by combining the transmission properties of HMSIW and SSPPs simultaneously. The operating bandwidth can be designed in a wide range by simply optimizing the dimensions of HMSIW and SSPPs. In addition, defected ground structures (DGSs) are etched on the bottom of the substrate to improve out-of-band suppression. The power division ratio of the proposed unequal power divider is finally optimized to 1:3. The measured results agree with the simulated one. Such design provides a stable power division within wide frequency range from 6.5 to 9.5 GHz.

Highlights

The rapid development of wireless communication systems proposes more and more requirements for functional devices
We proposed a novel unequal bandpass filtering power divider based on the hybrid Half-mode substrate integrated waveguide (SIW) (HMSIW)-Spoof surface plasmon polaritons (SSPPs) modes, which shows compact size and power division ratio of 1:3
As it can be seen in the figure, periodic corrugated slots are etched on the top layer of HMSIW

Summary

INTRODUCTION

The rapid development of wireless communication systems proposes more and more requirements for functional devices. Considering its perfect high-pass transmission with low-loss, high-efficient properties, functional devices such as filter [2], power divider [3,4,5,6] and coupler [7] have been proposed. Spoof surface plasmon polaritons (SSPPs) are guiding surface modes along periodic metamaterial structures Such modes have received wide attention for its unique properties of perfect low-pass transmission and near-field confinement [10, 11]. Filters and power dividers are the most commonly-used functional devices in wireless communication systems. In certain applications, both kinds of devices are required to be integrated with each other to reduce the occupied space. Defected ground structure is loaded aiming for improving out-of-band suppression

Design of Unequal Power Divider

CONCLUSION