Fractal Shaped Microstrip Coupled Line Band Pass Filters for Suppression of 2 Harmonic
نویسندگان
چکیده
In this paper, microstrip coupled line band pass filters using Koch fractal curves are proposed for the first time. These filters are fabricated on Liquid Crystal Polymer (LCP) substrate for Ku Band. Conventional microstrip coupled line filters are very popular for RF front ends because these can be made easily. However, their large 2 harmonic causes the shape of the pass band to be asymmetric in the upper band and it makes the skirt properties worse. By proper design, the 2 harmonic of fractal filters can be significantly suppressed through the use of fractal shapes. In LCP, the maximum harmonic suppression is almost 42 dB. Index Terms — Koch Fractal geometry, Fractal shape band pass microstrip coupled line filter, Liquid Crystal Polymer (LCP), 2 harmonic suppression
منابع مشابه
Koch Fractal Shape Microstrip Bandpass Filters on High Resistivity Silicon for the Suppression of the 2 Harmonic
In this paper, the fractal shape is applied to microstrip band pass filters and integrated on a high-resistivity Si substrate to solve conventional 2 harmonic problem. Conventional microstrip coupled line filters are popular in RF front ends, because they can be easily fabricated and integrated with other RF components. However, they typically have large second harmonics that can cause unwanted...
متن کاملDesign of Microstrip Band Pass Fractal Filter for Suppression of Spurious Band
In this paper, the design and subsequent fabrication of a hairpin-line band pass filter has been proposed. This filter exhibits periodic frequency response. By proper design, the spurious bands are being suppressed significantly through the implementation of Koch fractal on the microstrip coupled line.
متن کاملFractal-Shape 40 GHz Micros High-Resistivity Si for Sup Harmoni
In this paper, the Koch fractal shape is applied for the first time to microstrip bandpass filters integrated on a high-resistivity Si substrate. By using this method, the second harmonics of the filter can be suppressed to about -40 dB. Conventional microstrip coupled line filters are popular in RF front ends, because they can be easily fabricated and integrated with other RF components. Howev...
متن کاملDesign of Defected Ground Band Pass Filters Using Stepped Impedance Resonators
In this paper, band-pass filters based on the microstrip configuration and utilizing coupled defected ground structures are presented. The 50 Ω microstrip line has a gap discontinuity in the middle and characterized by stepped impedance resonators on either half. The four fractal geometries tested for defected ground are the first and second iterations of the modified Moore curve, the closed st...
متن کاملHarmonic Suppression of Parallel Coupled-Line Bandpass Filters using Defected Microstrip Structure
─ This paper presents a novel miniaturized parallel coupled-line bandpass filter by etching some slot resonators on the strip for suppressing the first spurious response. These slots perform a serious LC resonance property in certain frequency and suppress the spurious signals. By properly tuning these slot dimensions, multiple closed notches can be generated in the vicinity of spurious harmoni...
متن کامل