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

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

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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 <2 dB. The amplitude and phase imbalances are >0.3 dB and 3°, respectively. Both simulated and measured results are in good agreement.

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.8058
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