Mathematical Analysis of Microstrip Diplexer Design for WLAN System

  • Authors

    • Yaqeen S. Mezaal
    • Shahad K. Khaleel
    2018-12-09
    https://doi.org/10.14419/ijet.v7i4.36.28190
  • Microstrip diplexer, Microstrip BPF, stepped impedance resonator (SIR), source-load coupling and electrical parameters calculation.

  • Abstract

    Miniature microstrip diplexer at band frequencies of (1.45/1.95GHz and 2.5/3.5GHz) in two considered channels using the coupled stepped impedance resonators (SIRs) has been presented in this study with mathematical analysis. This diplexer has dual pairs of coupled SIRs with impedance ratio and the source-load coupling lines. As a result of the tuning of impedance ratio and length ratio  of SIRs, the resonant modes are possibly determined to achieve 2nd order bandpass filter (BPF) with dualband frequency responses for the investigated diplexer. The investigated microstrip diplexer has a simple outline, compact dimensions, an in effect design technique and straightforward calculations of impedance, electrical lengths, fractional bandwidth, coupling factors and other electrical specifications.

  • References

    1. [1] S. Srisathit, S. Patisang, R. Phromloungsri, S. Bunnjaweht, S. Kosulvit, and M. Chongcheawchamnan, “High isolation and compact size microstrip hairpin diplexer,†IEEE Microwave and Wireless Components Letters, vol. 15, no. 2, pp. 101–103, Feb. 2005.

      [2] Y. S. Lin, P. C. Wang, C. W. You, and P. Y. Chang, “New designs of bandpass diplexer and switchplexer based on parallel-coupled bandpass filters,†IEEE Transactions on Microwave Theory and Techniques, vol. 58, no. 12, pp. 3417–3426, Dec. 2010.

      [3] C. F. Chen, T. Y. Huang, C. P. Chou, and R. B. Wu, “Microstrip diplexers design with common resonator sections for compact size, but high isolation,†IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 5, pp. 1945–1952, May 2006.

      [4] S. Hong and K. Chang, “A 10–35-GHz six-channel microstrip multiplexer for wide-band communication systems,†IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 4, pp. 1370–1378, Apr. 2006.

      [5] H. W. Wu and R. Y. Yang, “A new quad-band bandpass filter using asymmetric stepped impedance resonators,†IEEE Microwave and Wireless Components Letters, vol. 21, no. 4, pp. 203–205, Apr. 2011.

      [6] F. C. Chen and Q. X. Chu, “Design of compact tri-band bandpass filters using assembled resonators,†IEEE Transactions on Microwave Theory and Techniques, vol. 57, no. 1, pp. 165–171, Jan. 2009.

      [7] Yaqeen S. Mezaal, Seham A. Hashim, Aqeel H. Al-Fatlawi and Hussein A. Hussein, “New microstrip diplexer for recent wireless applications,†International Journal of Engineering & Technology, vol.7, no. 3.4, pp. 1527–1530, 2018.

      [8] H. W. Wu, S. H. Huang and Y. F Chen, “Design of New Quad channel Diplexer with Compact Circuit Sizeâ€, IEEE Microwave Wireless Component Letter, 23, (5), pp. 240–242, 2013.

      [9] A. V. Raisanen, A. Lehto, “Radio Engineering for Wireless Communication and Sensor Applicationsâ€, 2003.

      [10] J. S. Hong and M. J. Lancaster, “Microstrip Filters for RF/Microwave Applicationsâ€, John Wiley & Sons,Inc.,2001.

      [11] D. M. Pozar, “Microwave Engineeringâ€, John Wiley & Sons, Inc., 2012.

      [12] S. J. Zeng, J. Y. Wu and W. H. Tu, “Compact and High-Isolation Quadruplexer Using Distributed Coupling Techniqueâ€, IEEE Microwave Wireless Component Letter, pp. 197–199, 2011.

      [13] T. Yang, P. L. Chi, and T. Itoh, “Compact Quarter-Wave Resonator and Its Application to Miniaturized Diplexer and Triplexerâ€, IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 2, 2011.

  • Downloads

  • How to Cite

    S. Mezaal, Y., & K. Khaleel, S. (2018). Mathematical Analysis of Microstrip Diplexer Design for WLAN System. International Journal of Engineering & Technology, 7(4.36), 1208-1210. https://doi.org/10.14419/ijet.v7i4.36.28190

    Received date: 2019-03-03

    Accepted date: 2019-03-03

    Published date: 2018-12-09