Integrated Microwave Bandpass And Bandstop Filter To Multifunction Operation In Wireless Communication System.

i

INTEGRATED MICROWAVE BANDPASS AND BANDSTOP FILTER TO
MULTIFUNCTION OPERATION IN WIRELESS COMMUNICATION
SYSTEM

NURUL FAMYZA BINTI ARHAM

This Report Is Submitted in Partial Fulfilment of Requirements For The
Bachelor Degree of Electronic Engineering (Telecommunications Electronics)
With Honours

Faculty of Electronics and Computer Engineering
Universiti Teknikal Malaysia Melaka

June 2016

ii

iii


DECLARATION

“I hereby declare that the work in this project is my own except for summaries and
quotations which have been duly acknowledge.”

iv

APPROVAL

“I acknowledge that I have read this report and in my opinion this report is sufficient
in term of scope and quality for the award of Bachelor of Electronic Engineering
(Industrial Electronics/ Computer Engineering/ Electronic Telecommunication/
Wireless Communication)* with Honours.”

v

DEDICATION

Special dedication to my beloved parents,


Arham bin Wasimin & Hafizah binti Aris

To my backbone

Mohd Fadhil Jamaludin
Mohd Nazrul Nizam
Nazatul Asyikin

To my supervisor

PM. Dr. Zahriladha bin Zakaria

My friends and my fellow lecturers
Thank you for all your care, support, guidance, and believe in me.

vi

ACKNOWLEDGMENT

First and the most important person that help me for the whole this two

semester PM. DR. Zahriladha bin Zakaria. Thank you for your guidance help me to
understand about this project. His guidance from the beginning to make me
understand about the project until the completion of this thesis. Thank you for
spending your valuable time to keep me on track while completing my project.
I also would like to give the appreciation to the Dean’s of faculty of
Electronic and Computer Engineering and also the lecturers who contribute during
the seminar thesis writing. Dr. Kok Swee Leong, the coordinator of PSM programme
for his inestimable and invaluable guidance. Thanks so much for taking time from
your busy schedule to give an introduction about this PSM program and provided the
sources of the courses.
I am thankful to technician PSM Lab, Encik Imran Bin Mohamed Ali and
technician Makmal Penyelidikan I, Encik Mohd Sufian Bin Abu Talib for helping me
during the fabrication and measurement process.
Thank you to all my friends who supported and help me during this final year
project.

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ABSTRACT


Ultra Wideband bandpass (UWB) filter provide a lot of advantage such as
low power and high data precision. However, UWB bandpass filter easy to get the
interference from the other radio frequency spectrum such as C-band satellite
communication system 4GHz, radar system 10GHz, and X-band satellite
communication 8.4GHz and radar system 10GHz. This project is to design the UWB
bandpass filter integrated with Defected Microstrip Structure (DMS). Function of the
DMS is to act as notched response. The pin diode added to act as tuning the notch
response. The substrate used is Roger 4350B with thickness 0.508mm, dielectric
constant 3.48 and loss tangent 0.0019. The tool for the measurement after the
fabrication process is by using the Vector Network Analyser (VNA). The return loss
must be better than 15 dB and the insertion loss around 0.1dB. When the pin diode
on the notched response occur at 6.7GHz while when the pin diode off the notched
response occur at 6.6GHz and 9.8GHz.

viii

ABSTRAK

Ultra luas jalur penapis laluan jalur (UWB) penapis memberikan banyak
kelebihan seperti tenaga yang rendah dan ketepatan data yang tinggi. Walau

bagaimanapun, UWB penapis laluan jalur mudah untuk mendapat gangguan dari
spektrum frekuensi radio yang lain seperti sistem komunikasi satelit C-band 4GHz,
sistem radar 10GHz, dan X-band komunikasi satelit 8.4GHz dan sistem radar
10GHz. Projek ini adalah untuk mereka bentuk penapis UWB laluan jalur bersepadu
dengan jalur tinggi bersepadu bersama dengan struktur mikro-strip (DMS). Fungsi
DMS adalah untuk bertindak sebagai tindak balas bertakuk. Pin diod ditambah
untukbertindak sebagai penalaan sambutan takuk. Substrat yang digunakan adalah
Roger 4350B dengan ketebalan 0.508mm, pemalar dielektrik 3.48 dan kehilangan
tangen 0.0019. Alat untuk mengukur selepas proses fabrikasi adalah dengan
menggunakan Vector Network Analyser (VNA). Kehilangan pulangan mestilah lebih
baik daripada 15 dB dan kehilangan sisipan sekitar 0.1dB. Apabila diod pin dibuka
kepada sambutan bertakuk berlaku pada 6.7GHz manakala apabila diod pin ditutup
sambutan bertakuk berlaku pada 6.6GHz dan 9.8GHz.

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TABLE OF CONTENT

CHAPTER


I

CONTENT

PAGES

TITLE

i

CONFIRMATION FORM

ii

DECLARATION

iii

APPROVAL


iv

DEDICATION

v

ACKNOWLEDGMENT

vi

ABSTRACT

vii

ABSTRAK

viii

TABLE OF CONTENT


ix

LIST OF TABLES

xii

LIST OF FIGURES

xiii

LIST OF ABBREVIATIONS

xv

LIST OF APPENDICES

xvi

INTRODUCTION
1.1 Introduction


1

1.2 Problem Statement

2

1.3 Objectives

2

1.4 Scope of Work

3

1.5 Chapter Review

3

x

II

LITERITURE REVIEW
2.1 Ultra –wideband (UWB)
2.1.1 UWB RF systems and applications

6

2.2 Introduction of filter

7

2.3 Type of filter

7

2.4 Microstrip

8


2.5 Notch Response

9

2.5.1 Defected Microstrip Structure
2.6 Related research
III

5

10
11

METHODOLOY
3.1 Methodology

16

3.2 Design UWB tunable bandpass filter

18

3.2.1 Filter specification

20

3.2.2 Calculation of UWB bandpass filter

21

3.2.3 UWB transmission line schematic

24

3.2.4 UWB microstrip line shematic

24

3.2.5 UWB Microstrip Schematic with T-junction

26

and Via-ground
3.2.6 Layout structure

IV

26

3.3 Defected Microstrip Structure (DMS)

27

3.4 UWB bandpass filter with Defected Microstrip structure

27

3.5 Fabrication and measurement

28

RESULT AND DISCUSSION
4.1 Transmission line schematic of UWB bandpass filter

29

4.2 Microstrip line schematic of UWB bandpass filter

31

4.3 Microstrip line schematic UWB bandpass filter

32

with T junction and Via ground.
4.3.1 Microstrip line schematic UWB bandpass
filter with T junction and via ground (before tuning).

32

xi
4.3.2 Microstrip line schematic UWB bandpass filter

34

with T junction and via ground (after tuning).

V

4.4 Layout structure of UWB bandpass filter

36

4.5 Defected Microstrip Structure (DMS)

38

4.6 UWB bandpass filter integrated with DMS

41

4.7 UWB bandpass filter integrated with DMS (fabrication)

42

CONCLUSION AND FUTURE WORK
5.1 Conclusion

45

5.2 Future Work

48

REFERENCES

49

APPENDICES

52

xii

LIST OF TABLE

TABLE

TITLE

PAGES

3.1

Specification of bandpass filter design

20

3.2

Properties of substrate Roger Duroid 4350B

20

3.3

Specification for number of order

21

3.4

Element Values of UWB Transmission Filter with

22

Short-Circuited Stub with Pass-band Ripple 0.1dB
.....3.5

Value of the characteristic admittances.

23

3.6

Value of the characteristic impedances

23

3.7

Value of width and length after ‘line-clac’

24

4.1

Value of width and length after the tuning process.

34

4.2

Value of the layout structure after the tuning process

37

xiii

LIST OF FIGURE

FIGURE

TITLE

PAGES

2.1

Low Pass, High Pass, Band-pass and Band-stop Filter.

8

2.2

Micro-strip Structure

9

2.3

Band-pass Filter with Notch Response

9

2.4

Defected Micro-strip Structure

10

3.1

Flow chart of the overall project

18

3.2

Flow chart of the overall project

19

3.3

Transmission line schematic

24

3.4

‘Line-Calc’ in ADS software

25

3.5

Microstrip line schematic

25

3.6

UWB Micro-strip Schematic with T-junction and

26

Via-ground
3.7

Picture of layout structure of UWB bandpass filter.

26

3.8

Type of the defected microstrip structure

27

3.9

Layout structure UWB bandpass filter with DMS.

27

4.1

Transmission line schematic of UWB bandpass filter.

30

4.2

Simulation result of transmission line schematic of

30

UWB bandpass filter.
4.3

Microstrip line schematic UWB bandpass filter

31

4.4

Simulation result of microstrip line schematic UWB

31

bandpass filter.
4.5

Microstrip line schematic with T junction and Via

33

ground (before tuning).
.....4.6

Simulation result of Microstrip line schematic with T

33

junction and Via ground (before tuning).
4.7

Mictcrosrip line schematic with T junction and
Via ground (after tuning)

35

xiv
4.8

Simulation result of Mictcrosrip line schematic with T

35

junction and Via ground (after tuning)
4.9

Layout structure of UWB from the microstrip line

36

4.10

Simulation result of layout structure of UWB from the

37

microstrip line.
4.11

Layout structure after the tuning process

37

4.12

Simulation result of the layout structure after the tuning

38

Process
4.13

T shaped of the defected microstrip structure.

38

4.14

Simulation result of T-shaped

39

4.15

H-shaped defected microstrip structure

39

4.16

Simulation result of the DMS

39

4.17

Square shaped DMS

40

4.18

Simulation result of square shaped

40

4.19

Square shaped DMS when pin diode off.

40

4.20

Simulation result of square shaped when pin diode off.

41

4.21

UWB integrated with DMS

41

4.22

Simulation result of UWB integrated with notched response

42

4.23

UWB integrated with DMS when pin diode off

42

4.24

Simulation result of UWB integrated with DMS when

42

pin diode off
4.25

Measurement result of UWB with DMS when pin diode on

43

4.26

Measurement result of UWB with DMS when pin diode off

44

xv

LIST OF ABBREVIATION

UWB

-

Ultra wide-band

BPF

-

Band-pass filter

DMS

-

Defected Microstrip Structure

DGS

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Defected Ground Structure

ADS

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Advance Design System

RF

-

Radio Frequency

FCC

-

Federal Communication Commission

MMR

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Multimode Resonator

WLAN

-

Wireless Local Area Network

DSLR

-

Dual Stub Loaded Resonator

VNA

-

Vector Network Analyzer

SIR

-

Step Impeadance Resonator

xvi

LIST OF APPENDICES

APPENDIX

TITLE

PAGES

A

INOTEK EXHIBITION 2016 POSTER

52

B

FABRICATION PROCESS

53

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