• Sadjad Divandari
  • Seyed Abdullah Mirtaheri



Abstract. Nowadays, filters are the main component of communication systems. Often they are used to
select certain frequencies. Filters usually plays a key role in choosing or limiting the radio frequency signals.
Compressed midrange filters are constructed by using in-line digital microstrip lines on composite lenses suitable for high frequencies with over 6,000 sub-layers. BFP microstrips, 1.69 / 2.3GHz dual-state dual-band 1.69 / 2.3GHz, are the new generation of microstrips that have just been introduced. In the present study, the performance of this type of microstrip was simulated. To simulate the BFP efficiency with different makeups, a set of simulations was performed based on HFSS. After examining a few cases, the study of the relationship between different parameters has been investigated. Finally, after examining different modes, the conclusions were discussed. The proposed filter design method can be very suitable for designing the receiver module and compact transmitter.
Keywords: microstrip, radio filter, intermediate frequency band pass filter, biaxial filter and double-sided.


S. Yang, L. Lin, J. Chen, K. Deng, and C. H. Liang, “Design of compact dual-band bandpass filter using

dual-mode stepped-impedance stub resonators, ” Electronics letters., vol. 50, no. 8, pp. 611-613, April. 2014.

X. Y. Zhang, J. X. Chen, Q. Xue, and S. M. Li, “Dual-band bandpass filters using stubloaded resonators, ”

IEEE .Microw. Wireless Compon. Lett., vol. 17, No.8, pp. 583-585, Aug. 2007.

M. Zhou, X. Tang, and F. Xiao, “Compact dual-band bandpass filters using novel e-type resonators with

controllable bandwidths”, IEEE .Microw. Wireless Compon. Lett., vol. 18, No.12, pp. 779-781, Dec. 2008.

Bin Yu, Baofu Jia and Zhaojun Zhu, “Compact tri-band bandpass filter with stub loaded stepped

impedance resonator”, Electronics letters., vol. 51, no.9, pp. 7011-7033, April. 2015.

S. B. Zhang and Zhu, “Fully canonical dual-band bandpass filter with /4 stepped impedance resonators”,

Electronics letters., vol. 50, no. 3, pp. 192-194, Feb. 2014.

S. B. Zhang and L. Zhu, “Synthesis design of dual-band bandpass filters with /4 stepped impedance

resonators”, IEEE Trans. Microw. Theory Tech., vol. 61, no. 12, pp. 1812-1819, May. 2013.

Lin, S. –C., “Microstrip dual/quad-band filters with coupled lines and quasi-lumped impedance inverters

based on parallel-path transmission”, IEEE Trans. Microw. Theory Tech., vol. 59, no. 8, pp. 1937-1946, 2011.

Zhang, S., Zhu, L., “Compact tri-band bandpass filter based on resonators with u-folded coupled-line”,

IEEE .Microw. Wireless Compon. Lett., vol. 23, No.5, pp. 258-261, 2013.

Heng, Y., Guo, X., Cao, B., Wei, B., Zhang, X., Zhang, G., and Song, X., “Compact superconducting dual-

band bandpass filter by combining bandpass and band-stop filters” , Electronics letters., vol. 49, no.19, pp.

-1232, 2013.

W. Feng, L. Gu, W. Che and H. Chen, “Tri-band Microstrip Bandpass Filter Using Input/Output Cross

Coupling,” Journal of Electromagnetic Waves and Applications., pp. 405-409, 2013.

A. Neghar, O. Aghzot, A. V. Alejos, M. G. Sanches and M. Essaaidi, “Design of Compact Multiband

Bandpass Filter with Suppression of Second Harminic Spurious by Coupling Gap Reduction,” Journal of

Electromagnetic Waves and Applications”., pp. 1813-1828, 2015.

Ahmed, Emad S. "Dual-Mode Dual-Band Microstrip Bandpass Filter Based on Fourth Iteration T-Square

Fractal and Shorting Pin." Radioengineering 21.2 (2012).