Compact Filtering Power Divider Based on Half Mode Substrate Integrated Waveguide

Abstract

Abstract-In this paper, a compact filtering power divider (PD) based on half mode substrate integrated waveguide (HMSIW) is presented. The proposed structure is realized by etching slots on the top layer of the HMSIW PD. Accordingly, two resonators are embedded in each patch, as a second order filter. The slots dimensions are obtained by the relationship between them and the extracted external quality factor and coupling coefficient. A good agreement between the simulated and measured results is reported. The measured 3 dB fractional bandwidth is 25% (6.3-8.1 GHz). The maximum insertion loss is 0.9 dB, and the return loss is above 20 dB in the passband. This design has the advantages of low insertion loss, improved out-of-band rejection, compact size, controllable bandwidth, and high selectivity.

Miniaturized filtering SIW power divider with arbitrary power-dividing ratio loaded by open complementary split-ring resonators

“…High cost and large size have limited the application of the traditional waveguide power dividers. Furthermore, these power dividers are difficult to be integrated with planar circuits [3]. Recently, substrate-integrated waveguide (SIW) structure has been introduced by two parallel rows of periodic via holes in a planar substrate as shown in Fig.…”