Hostname: page-component-7dd5485656-wxk4p Total loading time: 0 Render date: 2025-10-30T21:28:06.381Z Has data issue: false hasContentIssue false
  • English
  • Français

Design of a microstrip dual-frequency diplexer using microstrip cells analysis and coupled lines components

Published online by Cambridge University Press:  15 February 2017

Leila Noori  and
Abbas Rezaei
Leila Noori
Affiliation:
Young Researchers and Elite Club, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Abbas Rezaei*
Affiliation:
Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah, Iran
*
Corresponding author: Abbas Rezaei Emails: Leila_noori62@yahoo.com, unrezaei@yahoo.com
Get access Rights & Permissions [Opens in a new window]

Abstract

In this paper, a microstrip diplexer composed of two similar resonators is designed. The proposed resonator is consisting of four microstrip cells, which are connected to a coupled lines structure. In order to select a suitable geometric structure, first, all cells are assumed as undefined structures where there is a lack of basic information about their geometry and dimensions. Then, an equivalent LC circuit of the coupled lines is introduced and analyzed to estimate the general structure of the resonator respect to a requested resonance frequency. The proposed diplexer is designed to operate at 2.36 and 4 GHz for wireless applications. The insertion losses (S21 and S31) are decreased significantly at the resonance frequencies, so that they are 0.2 and 0.4 dB at 2.36 and 4 GHz, respectively. The designed diplexer is fabricated and measured and the measurement results are in a good agreement with the simulations.

Keywords

DiplexerCoupled linesMicrostripResonator

Information

Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Special Issue 7: EuCAP 2016 special issue , September 2017 , pp. 1467 - 1471
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

[1] Chinig, A. et al. : A new microstrip diplexer using coupled stepped impedance resonators. Int. J. Electr. Comput. Energetic Electr. Commun. Eng., 9 (2015), 41–44.Google Scholar
[2] Khalaj-Amirhosseini, M.; Moghavvemi, M.; Ameri, H.; Attaran, A.: Microstrip Diplexers with double-stub bandpass filters. Int. J. Commun. Antenna Propag., 1 (2011), 64–67.Google Scholar
[3] Nath, M.: Design and characterization of microstrip diplexer. Int. J. Eng. Trends Technol., 3 (2012), 183–186.Google Scholar
[4] Hsu, C.-H.; Tung, H.-H.; Hsu, C.-K.; Lin, J.-S.; Yang, H.-W.: Microstrip Diplexer Using High Permittivity Substrate, in Progress in Electromagnetics Research Symp. Proc., China, September 12, 2011, 497–500.Google Scholar
[5] LU, K.; WANG, G.-M.; XU, H.-Y.; YIN, X.: Design of compact planar diplexer based on novel spiral-based resonators. Radioengineering, 21 (2012), 528–532.Google Scholar
[6] L-Morales, H.; Sun, J.S.; C-Chavez, A.; Itoh, T.; Cervantes, J. L: Novel microstrip diplexer for ultra-wide-band (UWB) and wireless LAN (WLAN) bands. J. Electromagn. Waves Appl., 27 (2013), 1338–1350.Google Scholar
[7] Li, J.; Huang, Y.; Zhao, X.; Wen, G.: Compact microstrip bandpass diplexer based on twist revised split ring resonators. Int. J. Antennas Propag., 21 (2015), 528–532.Google Scholar
[8] Liu, H.; Xu, W.; Zhang, Z.; Guan, X.: Compact diplexer using slot line stepped impedance resonator. IEEE Microw. Wireless Compon. Lett., 23 (2013), 75–77.Google Scholar
[9] Cheng, F.; Lin, X.; Song, K.; Jiang, Y.; Fan, Y.: Compact diplexer with high isolation using the dual-mode substrate integrated waveguide resonator. IEEE Microw. Wireless Compon. Lett., 23 (2013), 459–461.Google Scholar
[10] Kuan, H.; Yang, R.Y.; Weng, M.H.; Chen, W.L.: A novel parallel-coupled line diplexer excited using slot-line resonators for ultra-wideband communications. Microw. Opt. Technol. Lett., 51 (2009), 1552–1555.Google Scholar
[11] Brinda, R.; Anisha Parveen, P.: Design of RF diplexer for mobile communication. Int. J. Comput. Appl., 85 (2014), 16–20.Google Scholar
[12] Shi, J.; Chen, J.-X.; Bao, Z.-H.: Diplexers based on microstrip line resonators with loaded elements. Progr. Electromagn. Res., 115 (2011), 423–439.Google Scholar
[13] Yang, F.; Guan, X.; Zhu, L.; Liu, H.: Compact Microstrip Diplexer for 4 G Wireless Communication, in Progress in Electromagnetics Research Symp. Proc., vol. 25 (2014), 599–602.Google Scholar
[14] Cabral, H.A.; Bezerra, S.T.G.; Melo, M.T.: A diplexer for UMTS applications, in IEEE MTT-S Int. Microwave and Optoelectronics Conf., Belém, Brazil, 3–6 November, 2009, 215–217.Google Scholar
[15] Williams, L.; Kim, S.: Enhance the design of LTCC RF modules. Microwaves & RF, 42 (2003), 90–96.Google Scholar
[16] Hong, J.S.; Lancaster, M.J.: Microstrip Filters for RF/Microwave Applications, Wiley, New York, 2001.CrossRefGoogle Scholar