Design of a Compact Dual-mode Dual-band Microstrip Bandpass Filter Based on Semi-fractal CSRRProgress In Electromagnetics Research Symposium , Stockholm, Sweden (2013)
Various complementary split ring resonators (CSRRs) are used as defected ground
structures (DGSs) in the bandpass filter (BPF) design for different communication applications.
In this paper, a hybrid CSRR has been introduced as a DGS in the ground plane of a dual-mode
microstrip BPF to produce a new compact filter with dual band response. The proposed CSRR
structure is essentially based on the conventional square double ring one, but with the inner ring
made in the form Minkowski-like pre-fractal curve. Simulation and performance evaluation of the
proposed filter have been carried out using a method of moment based EM simulator; the IE3D.
Simulation results show that the resulting filter offers a dual passband response. The higher
passband is attributed to the dual mode microstrip ring structure, while the lower passband is
as a result of the embedded CSRR DGS structure, which implies an extra filter miniaturization.
Results also show that the position of the lower passband could be varied, to certain extent,
without affecting the position of the higher passband. This can be performed by the application
of higher fractal iteration level to the inner split ring and/or dimension scaling of the whole
CSRR structure. This feature makes the proposed filter suitable as a candidate for use in a wide
variety of communication systems incorporating dual band operation.
Publication DateAugust 12, 2013
Citation InformationMushtaq Alqaisy, Jawad K. Ali, Chandan K Chakrabarty and Goh C Hock. "Design of a Compact Dual-mode Dual-band Microstrip Bandpass Filter Based on Semi-fractal CSRR" Progress In Electromagnetics Research Symposium , Stockholm, Sweden (2013)
Available at: http://works.bepress.com/jawad_ali/13/