Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit

The aim of this thesis is to improve the technique of converting Chebyshev, Butterworth and Composite Low Pass Filter into microstrip line circuit operating at Ultra-High Frequency (UHF) band (2.5 GHz) for wireless communication system. An improved technique for transforming lumped circuit into mi...

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Main Author:	Liew, Hui Fang
Format:	Thesis
Language:	English
Subjects:	Chebyshev Butterworth Microstrip Harmonic filter Microstrip line Filter
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/2/Full%20text.pdf
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spelling	my-unimap-594292019-04-11T01:00:57Z Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit Liew, Hui Fang Prof. Dr. Syed Idris Syed Hassan The aim of this thesis is to improve the technique of converting Chebyshev, Butterworth and Composite Low Pass Filter into microstrip line circuit operating at Ultra-High Frequency (UHF) band (2.5 GHz) for wireless communication system. An improved technique for transforming lumped circuit into microstrip line circuit for all high-order Chebyshev, Butterworth and Composite low pass filter is introduced. The high-order Butterworth and Chebyshev low pass filters are designed with a band pass ripple of 0.01 dB of order, n=3, 4, 5, 6, 7, 8 and 9, and implemented on FR4. The circuits are simulated and developed using Advanced Design System (ADS) without applying any optimization in order to maintain the actual response characteristic. The filters are then converted into microstrip lines using fringing compensation technique. A fringing compensation factor has been considered due to fringing in microstrip inductor and microstrip capacitor. The analytical results of lumped circuit are compared to the proposed microstrip line circuit transformed of lumped circuit. The ADS simulation results show that the response of the microstrip circuit for all types of low pass filter with fringing compensation factor have excellent agreement with its lumped circuit. Overall, the simulation results have accomplished excellent agreement with measurement results of all 3 types of microstrip low pass filters. It shows that the proposed technique achieved good agreement with the lumped circuit design. In other words, this technique is able to transform the design of high order Butterworth, Chebyshev, and Composite low pass filters into microstrip line circuit. The return loss (S11) which represents a matching response has achieved values greater than 20 dB. The results show that the insertion loss is less than 1 dB, whereby about 80% of the transmitted signal is received by the load. The achieved frequency response performance at the stopband (S21 at 2fc) is more than 40 dB. The output performance is improved as the number of order increases, and more unwanted frequency can be eliminated. Universiti Malaysia Perlis (UniMAP) 2014 Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/59429 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/1/Page%201-24.pdf e71853ad134335e584c0afb3dc3c75fd http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/2/Full%20text.pdf cc0ee641a20ad39e0b88728a34639f9b http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 Chebyshev Butterworth Microstrip Harmonic filter Microstrip line Filter School of Microelectronic Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Prof. Dr. Syed Idris Syed Hassan
topic	Chebyshev Butterworth Microstrip Harmonic filter Microstrip line Filter
spellingShingle	Chebyshev Butterworth Microstrip Harmonic filter Microstrip line Filter Liew, Hui Fang Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit
description	The aim of this thesis is to improve the technique of converting Chebyshev, Butterworth and Composite Low Pass Filter into microstrip line circuit operating at Ultra-High Frequency (UHF) band (2.5 GHz) for wireless communication system. An improved technique for transforming lumped circuit into microstrip line circuit for all high-order Chebyshev, Butterworth and Composite low pass filter is introduced. The high-order Butterworth and Chebyshev low pass filters are designed with a band pass ripple of 0.01 dB of order, n=3, 4, 5, 6, 7, 8 and 9, and implemented on FR4. The circuits are simulated and developed using Advanced Design System (ADS) without applying any optimization in order to maintain the actual response characteristic. The filters are then converted into microstrip lines using fringing compensation technique. A fringing compensation factor has been considered due to fringing in microstrip inductor and microstrip capacitor. The analytical results of lumped circuit are compared to the proposed microstrip line circuit transformed of lumped circuit. The ADS simulation results show that the response of the microstrip circuit for all types of low pass filter with fringing compensation factor have excellent agreement with its lumped circuit. Overall, the simulation results have accomplished excellent agreement with measurement results of all 3 types of microstrip low pass filters. It shows that the proposed technique achieved good agreement with the lumped circuit design. In other words, this technique is able to transform the design of high order Butterworth, Chebyshev, and Composite low pass filters into microstrip line circuit. The return loss (S11) which represents a matching response has achieved values greater than 20 dB. The results show that the insertion loss is less than 1 dB, whereby about 80% of the transmitted signal is received by the load. The achieved frequency response performance at the stopband (S21 at 2fc) is more than 40 dB. The output performance is improved as the number of order increases, and more unwanted frequency can be eliminated.
format	Thesis
author	Liew, Hui Fang
author_facet	Liew, Hui Fang
author_sort	Liew, Hui Fang
title	Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit
title_short	Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit
title_full	Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit
title_fullStr	Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit
title_full_unstemmed	Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit
title_sort	improvement of technique to convert chebyshev, butterworth and composite low pass filter into microstrip circuit
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Microelectronic Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/59429/2/Full%20text.pdf
_version_	1747836837428199424

Improvement of technique to convert Chebyshev, Butterworth and composite low pass filter into microstrip circuit

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