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Study on the Design of Coplanar Waveguide Microwave Filter

Author: LinHaoJia
Tutor: ShiXiaoWei
School: Xi'an University of Electronic Science and Technology
Course: Electromagnetic Field and Microwave Technology
Keywords: Coplanar waveguide Cross-coupling Dual - passband filter Wide stopband filter
CLC: TN713
Type: Master's thesis
Year: 2011
Downloads: 250
Quote: 1
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Abstract


Coplanar waveguide structure (Coplanar Waveguide), because it has a small amount of parasitic parameters, the integration density of the circuit is large, and the advantage of good dispersion of the filter design of the modern wireless communication has been widely applied. In this paper, collation and analysis of a large number of domestic and foreign literature, summed up the status quo and hotspots of coplanar waveguide filter, microwave filter method and cross-coupled design method, based on a coplanar waveguide structure designed several coplanar waveguide dual-passband filter and wide stopband filter. The main content of the concrete work as follows: First, in order to carry out the coplanar waveguide filter design, the basic design of microwave filters theoretical studies, the MATLAB programming the traditional filter integrated approach and cross-coupling theory of design methods, and produce Finally, the program interface, verify the correctness of the results of the program run by ADS. Secondly, the study design of the dual-pass band filter in the coplanar waveguide. Dual-passband filter based on the mode of separation theory, design and realization of a one-sided coplanar waveguide dual-passband filter; electromagnetic coupling theory, design a of a CPW slit ring and microstrip split ring hybrid coupler , respectively, extracted from the external Q value of the respective pass-band and the coupling coefficient of curve fitting the diagram, the design and processed to meet the target requirements of dual-passband filter. Further, through the coupling of the resonance circuit theory, design a CPWλ / 4 split ring resonator and the microstrip hybrid coupler, the dual-pass band filter, the equivalent circuit of the dual-passband filter, through theoretical analysis the value of the various components, and measured to verify the effectiveness of the design method using electromagnetic, circuit simulation and processing. Finally, a coplanar waveguide width stopband filter design, propose and analyze the characteristics of a band-stop coplanar waveguide λ / 4 SIR short circuit support section unit. By cascading three dimensions gradient coplanar waveguide λg / 4 the SIR unit and a the coplanar waveguide the spurline support section, designed a seven CPW wide stopband attenuation pole low-pass filter; stopband proposed a non-symmetrical structure of the coplanar waveguide band-pass filter, and by embedding the coplanar waveguides λg / 4 SIR unit design CPW wide stopband a stopband rejection to achieve a center frequency for more than seven octave band-pass filter . Finally, the design of the coplanar waveguide width stopband filter processing Found, to obtain a good performance.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Filtering techniques,the filter
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