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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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_ |
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