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

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

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.851150

DOI=10.3389/fphy.2022.851150

ISSN=2296-424X

ABSTRACT=<p>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.</p>