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

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.

Balanced Filtering Power Divider based on Odd-mode Hybrid Microstrip and Slotline Spoof Surface Plasmon Polaritons

“…Recently, the multifunctional integrated devices, such as filtering power dividers (FPDs) have been widely reported, which can not only achieve power distribution and frequency selection functions simultaneously but also avoid the additional power loss and size increase caused by the devices cascade [18][19][20][21][22][23]. Hence, several FPDs are proposed based on SSPP structure fed by CPW [18], slotline SSPP unit cells [19,20], and hybrid SSPP and substrate integrated waveguide (SIW) structures [21][22][23]. In [19], an ultra-wideband FPD is designed based on the quasi Y-junction slotline SSPP transmission line constructed by the corrugated grooves.…”