Design of wideband four-way filtering power divider based on SIW loaded square patch resonator

• Published in: Electronics letters 2019-04, Vol.55 (7), p.389-391
• Main Authors: Yang, Mengni, Wang, Jianpeng, Wang, Xuedao, Wu, Wen
• Format: Article
• Language: English
• Subjects: amplitude imbalance; cavity resonators; FPD; frequency 3.55 GHz; isolation network; microwave filters; microwave resonators; Microwave technology; open‐ended coupling lines; phase imbalance; power dividers; SIW cavity resonator; SIW loaded square patch resonator; substrate integrated waveguides; substrate‐integrated waveguide; wideband four‐way filtering power divider; wideband operation
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2018.8058

A new design of wideband four-way filtering power divider (FPD) based on substrate-integrated waveguide (SIW) loaded square patch resonator is presented. The wideband operation is realised by utilising the TM20 mode of the patch and the TE110 mode of the SIW cavity resonator. Afterwards, the selectivity is obtained by adding four open-ended coupling lines to each side of the square patch. Besides, an extra isolation network is introduced between each output port. To verify the design concept, a prototype of the proposed FPD operating at 3.55 GHz with a fractional bandwidth of 21.3% is fabricated and measured. Results indicate that the input return loss is >10 dB and the insertion loss is 0.3 dB and 3°, respectively. Both simulated and measured results are in good agreement.