© The Institution of Engineering and Technology
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.
References
-
-
1)
-
3. Zhang, X.Y., Wang, K.-X., Hu, B.-J.: ‘Compact filtering power divider with enhanced second-harmonic suppression’, IEEE Microw. Wirel. Compon. Lett., 2013, 23, (9), pp. 483–485 (doi: 10.1109/LMWC.2013.2274993).
-
2)
-
7. Pozar, D.M.: ‘Microwave engineering’ (Wiley, New York, 2005).
-
3)
-
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.
-
4)
-
1. Song, K.: ‘Compact filtering power divider with high frequency selectivity and wide stopband using embedded dual-mode resonator’, Electron. Lett., 2015, 51, (6), pp. 495–497 (doi: 10.1049/el.2014.4165).
-
5)
-
6. Guan, X., Yang, F., Liu, H., et al: ‘Compact and high-isolation diplexer using dual-mode stub-loaded resonator’, IEEE Microw. Wirel. Compon. Lett., 2014, 24, (6), pp. 385–387 (doi: 10.1109/LMWC.2014.2313591).
-
6)
-
1. Shao, C., Li, Y., Chen, J.-X.: ‘Compact dual-band microstrip filtering power divider using T-junction structure and quarter-wavelength SIR’, Electron. Lett., 2017, 53, (6), pp. 434–436 (doi: 10.1049/el.2017.0182).
-
7)
-
5. Guo, X., Zhu, L., Wang, J.-P., et al: ‘Wideband micros- trip-to-microstrip vertical transitions via multiresonant modes in a slotline resonator’, Trans. Microw. Theory Tech., 2015, 63, (6), pp. 1902–1909 (doi: 10.1109/TMTT.2015.2422695).
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2017.2166
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