Dual-Band Pass Filter with Wide Band-Frequency Rejection

  • Mushtaq A. Alqaisy Department of Computer Engineering, College of Engineering/Al-Iraqia University, Iraq
الكلمات المفتاحية: Dual-Band Pass Filter, Wide Band-Frequency Rejection


A Dual band Filter block has been highly attention due to its highly importance in wireless communication systems. High frequency level normally companies with the performance of filter block. The use of both low-pass or band-stop filter and the step-impedance lines methods to reduce the spurious characteristics of the filter are not a practical solution since that adds more complexity and large in size. The proposed microstrip filter was utilized for Industrial Scientific and Medical (ISM) applications (2.45 GHz) with -25 dB with twice transmission zeroes as a first band while the second band of (3.5-8 GHz) for LTE and wireless LAN applications with return loss up-to -15 dB. (CST) Computer Simulation Technology was used to simulate the declared structure. The dual band, mode simulation results have been extracted and also compared with the literature that get closed to each other. So that, the computer aided design gives a good pointer to adopt an extracting result that have been obtained using the aforementioned simulator.


[1] V. G. Veselago, “Electrodynamics of substances with simultaneously negative electrical and magnetic permeabilities,” Sov. Phys.-Usp., vol. 10, pp. 509–514, Jan.-Feb. 1968.
[2] J.B. Pendry, A.J. Holden, D.J. Robbins, and W.J. Stewart, Magnetism from conductors and enhanced nonlinear phenomena, IEEE Trans Microwave Theory Tech 47 (1999), 2075–2084.
[3] D.R. Smith, W.J. Padilla, D.C. Vier, S.C. Nemat-Nasser, and S.Schultz, Composite zedium with simultaneously negative permeability and permittivity, Phys Rev Lett 84 (2000), 4184–4187.
[4] G.V. Eleftheriades and K.G. Balmain (Eds.), Negative refraction metamaterials: Fundamental principles and applications, Wiley, New Jersey, 2005.
[5] Catherine A. Allen, Kevin M. K. H. Leong, Tatsuo Itoh, "Design of Ring Resonator Mode Spacing and Bandwidth using the Phase Response of Composite Right/Left Handed Transmission Lines," IEEE MTT International Microwave Symposium, 2005.
[6] S.S. Karthikeyan and Rakhesh Singh Kshetrimayum, “Performance Enhancement of Microstrip Bandpass Filter using CSSRR”, International Conference on Advances in Computing, Control, and Telecommunication Technologies, 2009.
[7] J. Bonache, F. Martin, J. Garcia-Garcia I. Gil, and R. Marques,”Ultra Wide Band Pass Filters (UWBPF) Based on Complementary Split Ring Resonators”, Microwave and optical technology letters, Vol. 46, No. 3, August 5 2005.
[8] J.-S. Hong and M.J. Lancaster, Microstrip filters for RF/Microwave applications, Wiley, New York, 2011.
[9] Abid Ali and Zhirun Hu,” Metamaterial Resonator Based Wave Propagation Notch for Ultrawideband Filter Applications”, IEEE Antennas and Wireless Propagation Letters, Vol. 7, 2008.
[10] Li, Z.-J. Li, C.-H. Liang and B. Wu,”UWB bandpass filter with notched band using DSRR”, ELECTRONIC LETTERS, 13th May 2010, Vol.46, No. 10.
[11] Abid Ali and Zhirun Hu,” Negative Permittivity Metamaterial for Microwave Circuit Applications”, International Conference, London, IEEE Xplore, 2009.