LIST OF TABLES
NO TITLE
PAGE
2.1 Element values for Butterworth lowpass prototype
9
2.2 Transformation Table
12 3.1
g value for n=4 39
3.2 Transformation TableValues spacing and quality factor
39 3.3
Values spacing and coupling coefficient 40
4.1 g value for n=4
44 4.2
Q
e
and M
ij
values 44
4.3 Spacing for n=4 combline filter
46 4.4
S
11
S
21
simulated values 48
4.5 -3dB value for simulated result
49
LIST OF FIGURE
NO TITLE
PAGE
2.1 Chebyshev and Butterworth Response
7 2.2
LPP for all-pole filter 8
2.3 Microstrip line
22 2.4
Coaxial Cable 23
2.5 Coupled-line
24 2.6
Couple Line Coupler 25
2.7 End-Coupled half-wavelength resonator
26 2.8
Parallel-Coupled half-wavelength resonator 27
2.9 Hairpin Filter
27 2.10 Interdigital Filter
28 2.11 Combline Filter
29 2.12 Coupled Rectangular Bars Centered Between Parallel Bars
33 3.1
Block Diagram 34
3.2 Lowpass Prototype Filter
36 3.3
Lumped Element Bandpass Filter 37
3.4 Resonators Configuration to Determined Spacing
38 3.5
S
21
deg Vs Frequency 38
3.6 Q
e
Vs Spacing 39
3.7 S
21
dB Vs Spacing 40
3,8 M Vs Spacing
40 3,9
Project Flow Chart 42
4.1 Q
e
Vs Spacing 44
4.2 M Vs Spacing
44 4.3
EM structure of n=4 combline filter 46
4.4 S
21
and S
11
simulated values 48
4.5 S
21
cutoff values 49
LIST OF ABBREVIATION
LPP- Lowpass Prototypes LPF- Lowpass Filter
HPF- Highpass Filter BPF- Bandpass Filter
BSF- Bandstop Filter S-parameter- Scattering Parameter
RF- Radio Frequency
FR-4 board- Frequency Redundant 4 board ISM band-
Industrial, Scientific and Medical Band ADS- Advanced Design System
LIST OF APPENDIXES
NO CONTENT
A Element value for Chebyshev lowpass prototype
B Graph of Attenuation Vs normalized Frequency
C Element Values for Chebyshev
D Lumped Element Calculation
E Quality Factor and Coupling Coefficient Calculation
F Design of Microwave Filter
G Characteristic of Coupled Microstriplines
H Gantt Chart
I Technical Report
CHAPTER 1
INTRODUCTION
Filters play important roles in many RFmicrowave applications including cellular radio, satellite communication, and radar. They are used to separate or
combine different frequencies. The electromagnetic spectrum is limited and has to be shared. Therefore, filters are used to select and confine the RFmicrowave signals
within assigned spectral limits. The first chapter of this report is the introduction part of the report. In this
chapter, the background studies, the problem statements, the objectives and the scope of work will be discussed
1.1 Background Studies
Kategori