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Research and Design of Bandpass Filters Using LC Resonators

Author: ShuHanJun
Tutor: SongYuJie
School: Wuhan University of Science and Technology
Course: Pattern Recognition and Intelligent Systems
Keywords: Band-pass filter Multilayer dielectric structure HFSS
CLC: TN713.5
Type: Master's thesis
Year: 2011
Downloads: 205
Quote: 1
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Abstract


With the rapid development of wireless mobile communication technology , the traditional front-end RF components design concept can not meet the needs of today 's mobile communications system components , based on low temperature co-fired ceramic (LTCC, Low Temperature Co-fired Ceramic) technology, multi-layer the media structure design technology but provides a solution for today 's mobile communication technology . In this paper, the design process , simulation and parameter extraction of three-dimensional structural model of LTCC microwave filters through the 3D field simulation software Ansoft's HFSS (High Frequency Structure Simulator) . The second dual transmission Bandpass Filters for the study, numerical analysis and engineering design . First , the design of two new second dual transmission zeros bandpass filter structure . Through capacitive coupling between a filter cavity , the use of the capacitive coupling of the input and output terminal a feedback capacitor , and two transmission zeros are introduced ; between another filter resonant cavity is performed by Inductively Coupled introduction of the coupling capacitor , the ground terminal , get two transmission zeros . Secondly, these two types of second-order band-pass filter in-depth research and analysis of the two types of filter parameter values ??change the filter performance . Then , two second-order the general capacitor filter method and steps . Finally, the analysis of the advantages and disadvantages of the two second-order band-pass filter , and pointed out their generally applicable scenes . Low compared to today 's traditional domestic microwave bandpass filter , microwave bandpass filter , the second not only has a small size , compact structure , flexible design features , and in-band insertion loss and limited transmission band by adjusting zero frequency point position so that it has a better frequency selectivity and immunity to electromagnetic interference , more in line with modern mobile communication application prospects for engineering applications .

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