access icon free Design of a filtering power divider with microstrip-to-slotline transition structures

A filtering power divider (FPD) with high selectivity is presented. Initially, by elaborately introducing two different types of microstrip-to-slotline transition structures and a pair of dual-mode stub-loaded resonators, dual-mode bandpass response is attained in this design. Afterwards, the resistor R is utilised to achieve high in-band isolation between two output ports of the FPD. Moreover, four transmission zeros are generated outside the passband for high selectivity performance. To validate the feasibility of the new approach, a prototype FPD operating at 3.62 GHz (f 0) is designed, fabricated and measured. Both simulated and measured results are provided in good agreement indicating that the proposed FPD exhibits a better than 20 dB isolation inside the passband and extended upper stopband up to 10 GHz.

Inspec keywords: microwave filters; band-pass filters; microstrip transitions; microstrip filters; microwave resonators; resonator filters; power dividers; microstrip resonators; resistors

Other keywords: resistor; microstrip-to-slotline transition structure; frequency 3.62 GHz; dual-mode bandpass response; FPD; transmission zero generation; dual-mode stub-loaded resonator; filtering power divider

Subjects: Resistors; Waveguides and microwave transmission lines; Passive filters and other passive networks; Waveguide and microwave transmission line components

References

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      • 4. Jiang, W., Wang, T.-X., Peng, Y.-J., et al: ‘Bandpass filtering power divider with sharp roll-off skirt and enhanced in-band isolation’. IEEE MTT-S Int. Microwave Symp. Digest, San Francisco, CA, USA, May 2016.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.2166
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