Design of X-Bandpass Waveguide Chebyshev Filter Based on CSRR Metamaterial for Telecommunication Systems

Abstract

This paper presents a new design of a fifth order bandpass waveguide filter with Chebyshev response which operates in the X-band at 10 GHz center frequency. By using a complementary split ring resonator (CSRR) upper and lower sections that are placed on the same transverse plane and are not on the same parallel line, CSRR sections are shifted from each other. A simple model of lumped elements RLC is introduced and calculated as well. The model of the proposed bandpass waveguide filter is synthesized and designed by using computer simulation technology (CST). Hereafter, by selecting proper physical parameters and optimizing the overall CSRR geometrical dimensions by taking into consideration the coupling effect between resonators, a shortened length of the overall filter, and a wider bandwidth over the conventional one are obtained. As a result, the proposed filter is compared with the conventional bandpass waveguide filter that is coupled by inductive irises with Chebyshev response, in addition to other studies that have used the metamaterial technique. The proposed filter reduces the overall physical length by 31 % and enhances the bandwidth up to 37.5 % .

Design of Chebyshev Bandpass Waveguide Filter for E-band Based on CSRR Metamaterial

“…In [38], the use of CSRR to design a compact filter by an engraving metallic sheet is demonstrated. Here, in this paper, and based on [39] a double ring meta-resonator engraved from the center of CSRR as shown in As shown in Figure 3, full-wave CST simulator is used to simulate rectangular waveguide resonator which it's initial length d = λ/2 at 73.5 GHz with lower cutoff frequency f l = 71 GHz, higher cutoff frequency f h = 76 GHz, and 0.043 dB passband ripple. In addition, using substrate material (RT/ Duroid) with a thickness of 0.5 mm, permittivity constant ϵ r = 2.2, and appropriate mesh density selection 10 steps per wavelength with 20 min number of steps are selected.…”

Applications of Electromagnetic Waves: Present and Future

“…Regarding high frequency component design, in [15] the design of a fifth order bandpass waveguide filter with Chebyshev response is proposed, which operates in the X-band at a center frequency of 10 GHz. The structure is based on complementary split ring resonators (CSRRs) and reduces the overall physical length by 31% while enhancing the bandwidth up to 37.5% compared to the conventional designs.…”