© The Institution of Engineering and Technology
This Letter presents a novel out-of-phase filtering power divider (FPD) with a very wide stopband by using double-sided parallel-strip line (DSPSL) and through ground via (TGV). The DSPSL structure facilitates the out-of-phase outputs of the FPD. The TGV and two complex-impedance terminations connected to the common input port are employed to achieve the isolation. By choosing proper feeding coupling region and the loading resistors at the centre of the resonators, the second, third and fourth harmonics are suppressed. For verification, a prototype FPD operating at 1.85 GHz (f 0) with 5.2% bandwidth is designed, fabricated and measured. The experimental results show that the isolation between the output ports is better than 24 dB across the passband, and the 28 dB rejection band is extended to 4.6f 0.
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)
-
2. Zhao, X.-L., Gao, L., Zhang, X.Y., Xu, J.-X.: ‘Novel filtering power divider with wide stopband using discriminating coupling’, IEEE Microw. Wirel. Compon. Lett., 2016, 26, (8), pp. 580–582 (doi: 10.1109/LMWC.2016.2585551).
-
3)
-
5. Li, Y.C., Xue, Q., Zhang, X.Y.: ‘Single- and dual-band power dividers integrated with bandpass filter’, IEEE Trans. Microw. Theory Tech., 2013, 61, (1), pp. 69–76 (doi: 10.1109/TMTT.2012.2226600).
-
4)
-
2. Shao, J.-Y., Huang, S.-C., Pang, Y.-H.: ‘Wilkinson power divider incorporating quasi-elliptic filters for improved out-of-band rejection’, Electron. Lett., 2011, 47, (23), pp. 1288–1289 (doi: 10.1049/el.2011.2766).
-
5)
-
5. Song, K., Mo, Y., Xue, Q., et al: ‘Wideband four-way out-of phase slotline power dividers’, IEEE Trans. Ind. Electron., 2014, 61, (7), pp. 3598–3606 (doi: 10.1109/TIE.2013.2279380).
-
6)
-
3. Deng, P.-H., Dai, L.-C.: ‘Unequal Wilkinson power dividers with favorable selectivity and high-isolation using coupled-line filter transformers’, IEEE Trans. Microw. Theory Tech., 2012, 60, (6), pp. 1520–1529 (doi: 10.1109/TMTT.2012.2189409).
-
7)
-
8. Zhang, X.Y., Liu, X.-F., Li, Y.C., et al: ‘LTCC out-of-phase filtering power divider based on multiple broadside coupled lines’, Compon. Packag. Manuf. Technol., 2017, 7, (5), pp. 777–785 (doi: 10.1109/TCPMT.2017.2661997).
-
8)
-
3. Lu, Y.L.: ‘A broadband out-of-phase power divider for high power applications using through ground via’, Prog. Electromagn. Res., 2013, 137, pp. 653–667 (doi: 10.2528/PIER13010705).
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