Dual-Band Filtering Power Divider Based on CSRRs Loaded SIW Cavity
Jian Zheng, Gang Zhang, Xin Zhou, Chuyun Xie, Yingjie Zhang, Xirui Wang, Yijie Liu, Wanchun Tang, Jiquan Yang
Abstract
This brief proposes a dual-band filtering power divider (FPD) based on a single substrate integrated waveguide (SIW) cavity with complementary split-ring resonators (CSRRs). The first passband is obtained by employing the metallic vias to control the perturbed TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> ’ and TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sub> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">02</sub> ’-modes, while the second passband is obtained by the CSRRs etched on the bottom metal layer. Particularly, the bandwidths (BWs) and center frequencies (CFs) can be adjusted to a certain extent by changing the CSRRs and metallic vias. Dual-band isolation is realized by wisely loading a resistor between the output ports on the top metal layer and loading another one on the slot line of the bottom layer, correspondingly. A prototype dual-band FPD operating at 11.24 GHz and 13.67 GHz is designed, fabricated, and measured for verification. Good accordance between simulation and measurement can be observed.