Skip to main content Accessibility help
×
Home

Study of dual-band inline mixed coupled BPF design and two transmission zero pairs controlling mechanism

  • Di Lu (a1) (a2), Teng-Fei Yan (a1) and Xiao-Hong Tang (a1)

Abstract

In this letter, a passive high-selectivity dual-band filter with two controllable transmission zero (TZ) pairs is proposed, while synthesis method and control mechanism of the two TZ pairs are investigated. Specifically, by employing the magnetic/electric mixed coupling (MEMC), source–load coupling (S–L coupling) and stepped-impedance resonators, a dual-band bandpass filter with two pairs of controllable TZs is constructed. Two controllable TZ pairs can be independently adjusted by re-modifying the associated coupling structures. To validate the synthesizability and controllability of the TZ pairs, mathematical synthesis, and EM simulations are carried out. Two demonstrative filters with identical passband performance and different central TZ distributions for GSM (0.9/1.8 GHz) are designed and measured. The analysis and experimental results show that the synthesis-controllable TZ pair (f z2 , fz3) introduced by MEMC can be synthesized and controlled using inline mixed coupling synthesis, and the optimization-controllable TZ pair (fz1, fz4) because of S–L coupling is controlled by S–L coupling strength optimization procedure.

Copyright

Corresponding author

Corresponding author: D. Lu Email: ludi888abc@hotmail.com, 201311020205@std.uestc.edu.cn

References

Hide All
[1] Mokhtaari, M.; Bornemann, J.; Rambabu, K.; Amari, S.: Coupling-matrix design of dual and triple passband filters. IEEE Microw. Wireless Compon. Lett., 54 (2006), 34903492.
[2] Zhang, S.; Zhu, L.: Compact split-type dual-band bandpass filter based on resonators. IEEE Microw. Wireless Compon. Lett., 23 (2013), 344346.
[3] Zhou, M.; Tang, X.; Xiao, F.: Compact dual band transversal bandpass filter with multiple transmission zeros and controllable bandwidths. IEEE Microw. Wireless Compon. Lett., 19 (2009), 347349.
[4] Chen, W.; Zhao, Y.-J.; Zhou, X.-J.: Compact and high selectivity dual-band dual-mode microstrip BPF with folded SIR, in Microwave Workshop Series on Millimeter Wave Wireless Technology and Applications (IMWS) IEEE MTT-S International, 2012.
[5] Chen, F.-C.; Qiu, J.-M.; Wong, S.-W.; Chu, Q.-X.: Dual-band coaxial cavity bandpass filter with helical feeding structure and mixed coupling. IEEE Microw. Wireless Compon. Lett., 25 (2015), 3133.
[6] Wu, G.; Wang, G.; Liang, J.G.; Gao, X.; Zhu, L.: Miniaturised microstrip dual-band bandpass filter using novel symmetric double-spiral resonators for WLAN application. Electron. Lett., 51 (2015), 11771178.
[7] Gao, L.; Zhang, X.Y.: High-selectivity dual-band bandpass filter using a quad-mode resonator with source-load coupling. IEEE Microw. Wireless Compon. Lett., 23 (2013), 474476.
[8] Wei, X.B.; Shi, Y.; Wang, P.; Liao, J.X.; Xu, Z.Q.; Yang, B.C.: Compact dual-band bandpass filter with improved stopband characteristics. Electron. Lett., 48 (2012), 704706.
[9] Jiang, W.; Shen, W.; Zhou, L.; Gao, A.-M.; Yin, W.-Y.; Mao, J.-F.: Design of compact dual-band quasi-elliptic filter with high selectivity and wide stopband rejection, in Proc. APMC (2012), Kaohsiung, Taiwan, 4–7.
[10] Zhang, S.-B.; Zhu, L.; Weerasekera, R.: Synthesis of inline mixed coupled quasi-elliptic bandpass filters based on resonators. IEEE Trans. Microw. Theory Tech., 63 (2015), 34873493.
[11] Makimoto, M.; Yamashita, S.: Microwave Resonators and Filters for Wireless Communication: Theory, Design and Application, Springer, New York, NY, 2001.

Keywords

Related content

Powered by UNSILO

Study of dual-band inline mixed coupled BPF design and two transmission zero pairs controlling mechanism

  • Di Lu (a1) (a2), Teng-Fei Yan (a1) and Xiao-Hong Tang (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.