A simple wideband filtering-response power divider (FPD) with sharp passband selectivity and good UWB isolation is presented. By ingeniously integrating multimode resonators and stub attached coupled-line isolation network, the FPD is initially built. Compared to those in the literatures, the presented wideband FPD features its simple structure and good wideband performance. For demonstration, a prototype FPD with a central frequency of 2.46 GHz and 3 dB fractional bandwidth of 22.8% is implemented. Final results indicate that this FPD possesses not only sharp frequency selectivity and wide stopband attributing to six created transmission zeros, but also an isolation better than 16 dB over an UW isolated frequency band (from DC to 2.67f ⁰).

References

1. 1)
  - 3. Zhang, G., Wang, J., Zhu, L., et al: ‘Dual-mode filtering power divider with high passband selectivity and wide upper stopband’, Microw. Wirel. Compon. Lett., 2017, 27, (7), pp. 642–644 (doi: 10.1109/LMWC.2017.2711556).
2. 2)
  - 4. Chen, C.J., Ho, Z.C.: ‘Design equations for a coupled-line type filtering power divider’, Microw. Wirel. Compon. Lett., 2017, 27, (3), pp. 257–259 (doi: 10.1109/LMWC.2017.2661968).
3. 3)
  - 5. Feng, W.J., Che, W.Q., Chang, Y.M., et al: ‘High selectivity fifth-order wideband bandpass filter with multiple transmission zeros based on transversal signal-interaction concepts’, IEEE Trans. Microw. Theory Tech., 2013, 61, (1), pp. 89–97 (doi: 10.1109/TMTT.2012.2227785).
4. 4)
  - 8. Pozar, D.M.: ‘Microwave engineering’ (Wiley, New York, USA, 2005, 3rd edn.).
5. 5)
  - 10. Sun, S., Zhu, L.: ‘Novel design of dual-band microstrip bandpass filters with good in-between isolation’. Proc. Asia-Pacific Microw. Conf., Suzhou, China, December 2005, pp. 729–732.
6. 6)
  - 2. Deng, Y.J., Wang, J.P., Zhu, L., Wu, W.: ‘Filtering power divider with good isolation performance and harmonic suppression’, IEEE Microw. Wirel. Compon. Lett., 2016, 26, (12), pp. 984–986 (doi: 10.1109/LMWC.2016.2623244).
7. 7)
  - 9. Hong, J.S., Lancaster, M.J.: ‘Microstrip filters for RF/microwave applications’ (Wiley, New York, USA, 2001, 2nd edn.).
8. 8)
  - 1. Wu, Y., Zhuang, Z., Liu, Y., Deng, L., Ghassemlooy, Z.: ‘Wideband filtering power divider with ultra-wideband harmonic suppression and isolation’, IEEE Access, 2016, 4, (9), pp. 6876–6882 (doi: 10.1109/ACCESS.2016.2613883).
9. 9)
  - 4. Chen, C.-F., Huang, T.-Y., Shen, T.-M., Wu, R.-B.: ‘Design of miniaturized filtering power dividers for system-in-a-package’, IEEE Trans. Compon. Packag. Manuf. Technol., 2013, 3, (10), pp. 1663–1672 (doi: 10.1109/TCPMT.2013.2254488).
10. 10)
  - 6. Deng, Y., Wang, J., Li, J.: ‘Design of compact wideband filtering power divider with extended isolation and rejection bandwidth’, Electron. Lett., 2016, 52, (16), pp. 1387–1389 (doi: 10.1049/el.2016.0951).
11. 11)
  - 3. Wang, X., Wang, J., Zhang, G.: ‘Design of wideband filtering power divider with high selectivity and good isolation’, Electron. Lett., 2016, 52, (16), pp. 1389–1391 (doi: 10.1049/el.2016.2065).

Simple wideband FPD with sharp passband selectivity and nice UWB isolation

References

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