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Society for Applied Microwave Electronics Engineering & Research Kolkata
Center
Ministry of Electronics & Information Technology
Government of India
Work Based Learning (WBL-Level2)
Assessment-1
Duration : 9th September 2023 to 9th March 2024
Presented By
Gaurav Bharti
Co-ordinator Supervisor
Dr.Satyajit Chakraborty Mr. Aritra Banerjee
Scientist Scientist
Objective
Design of 5th Order Parallel Coupled
Microstrip Band pass filter
• To Design a 5th Order Parallel Coupled Microtrip
Bandpass Filter Which operates at the centre frequency of
4 GHz whose FBW%=12.5 % Having Passband Ripple 0.2dB
•To Gain Hands on experience of Designing & Simulation of
microstrip Bandpass Filter Followed by its Fabrication &
Testing.
Bandpass Filter Design specification:
• Centre Frequency : 4 GHz
• 3dB Bandwidth : 0.5 GHz
• Impedance : 50Ω
• Order of the Filter (n) : 5
• Fractional BW% : 12.5%
• Passband Ripple : 0.2dB
• Substrate : Rogers RT/Duroid 5880
• Dielectric constant(εr ) : 2.2
• tangential loss (tan δ) : 0.0004
• Substrate’s Thickness : 10 mil
The Normalized 5th Order Tchebyshev Low-pass
Prototype Filter’s Element Values
• n
• g values at (0.2dB rip
n g values at (0.2dB ripple)
L1-C1 1.3394
L2-C2 1.3370
L3-C3 2.1660
L4-C4 1.3370
L5-C5 1.3394
RL /Rs
1.0000
Further, Low-pass Prototype Filter is Impedance Scaled &
Frequency Transformed As Per Required Design Specification
Lumped Circuit Design
Simulation Graph of Lumped Circuit Design
Calculation of Admittance Inverter & even – Odd
Impedance
SN (ZoJ) Admittance
inverter
Zoe(even
impedance)
Zoo ( odd
Impedance)
J01 0.3827803943 76.46 38.18
J12 0.1466522784 58.40 43.74
J23 0.1153226824 56 44.89
J34 0.1153226824 56 44.89
J45 0.1466522784 58.40 43.74
J56 0.3827803943 76.46 38.18
Simulation Graph of S-parameter of ideal CLIN Schematic design
S-parameter simulation Graph of ideal CLIN Schematic design _ to show S(1,1) at 4 GHz
The next step of the filter Design is to find out physical Dimensions of
Coupled Lines Resonators that are based on even –odd and characterstic
impedances . Which is calculated using ADS Software tool – Linecal
Width, Spacing, Length of Coupled line as per Even and Odd
mode impedances calculated using ADS tool :- Linecal
Resonators W ( mm) S(mm) L( mm)
1 0.60 0.042 14.12
2 0.71 0.21 13.81
3 0.73 0.30 13.77
4 0.73 0.30 13.77
5 0.71 0.21 13.81
6 0.60 0.042 14.12
Microstrip Parallel Coupled Line Bandpass filter Design Based on even-odd Impedances's
physical parameters simulation Graph
Optimized and Tuned Physical
Dimensions
Resonators W ( mm) S(mm) L( mm)
1 0.32 0.125 13.88
2 0.63 0.21 13.88
3 0.125 0.26 13.63
4 0.125 0.26 13.63
5 0.63 0.21 13.88
6 0.32 0.125 13.88
Microstrip Parallel Coupled Line Bandpass filter optimized and tuned Design S parameter
Graph
Substrate Details
Layout generated from optimized schematic Design
S-Parameter Graph of Layout generated from optimized schematic
Optimized Layout Structure
Tapered sections have been used to connect Quarter wavelength line
Optimized Layout Graph (S- Parameter)
Ansys HFSS Simulated Layout
HFSS Simulated Layout
Ansys HFSS Simulated Layout Graph
Conclusion
Requirement Outcome
3dB Bandwidth (3.75GHz – 4.25
GHz)= 0.5 GHz
3dB Bandwidth (3.73GHz-
4.23GHz)= 0.5 GHz
Insertion Loss -1.50dB
Return Loss Min- -13dB
Max- -31.5dB
Filter’s Layout
dimension
Length= 98.800mm
Width = 5.46mm
Further work to be carried out
•Fabrication
•Testing
Thank You!

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Microstrip Bandpass Filter Design using EDA Tolol such as keysight ADS and Ansys HFSS along with its Fabrication

  • 1. Society for Applied Microwave Electronics Engineering & Research Kolkata Center Ministry of Electronics & Information Technology Government of India Work Based Learning (WBL-Level2) Assessment-1 Duration : 9th September 2023 to 9th March 2024 Presented By Gaurav Bharti Co-ordinator Supervisor Dr.Satyajit Chakraborty Mr. Aritra Banerjee Scientist Scientist
  • 2. Objective Design of 5th Order Parallel Coupled Microstrip Band pass filter • To Design a 5th Order Parallel Coupled Microtrip Bandpass Filter Which operates at the centre frequency of 4 GHz whose FBW%=12.5 % Having Passband Ripple 0.2dB •To Gain Hands on experience of Designing & Simulation of microstrip Bandpass Filter Followed by its Fabrication & Testing.
  • 3. Bandpass Filter Design specification: • Centre Frequency : 4 GHz • 3dB Bandwidth : 0.5 GHz • Impedance : 50Ω • Order of the Filter (n) : 5 • Fractional BW% : 12.5% • Passband Ripple : 0.2dB • Substrate : Rogers RT/Duroid 5880 • Dielectric constant(εr ) : 2.2 • tangential loss (tan δ) : 0.0004 • Substrate’s Thickness : 10 mil
  • 4. The Normalized 5th Order Tchebyshev Low-pass Prototype Filter’s Element Values • n • g values at (0.2dB rip n g values at (0.2dB ripple) L1-C1 1.3394 L2-C2 1.3370 L3-C3 2.1660 L4-C4 1.3370 L5-C5 1.3394 RL /Rs 1.0000 Further, Low-pass Prototype Filter is Impedance Scaled & Frequency Transformed As Per Required Design Specification
  • 6. Simulation Graph of Lumped Circuit Design
  • 7. Calculation of Admittance Inverter & even – Odd Impedance SN (ZoJ) Admittance inverter Zoe(even impedance) Zoo ( odd Impedance) J01 0.3827803943 76.46 38.18 J12 0.1466522784 58.40 43.74 J23 0.1153226824 56 44.89 J34 0.1153226824 56 44.89 J45 0.1466522784 58.40 43.74 J56 0.3827803943 76.46 38.18
  • 8.
  • 9. Simulation Graph of S-parameter of ideal CLIN Schematic design
  • 10. S-parameter simulation Graph of ideal CLIN Schematic design _ to show S(1,1) at 4 GHz
  • 11. The next step of the filter Design is to find out physical Dimensions of Coupled Lines Resonators that are based on even –odd and characterstic impedances . Which is calculated using ADS Software tool – Linecal
  • 12. Width, Spacing, Length of Coupled line as per Even and Odd mode impedances calculated using ADS tool :- Linecal Resonators W ( mm) S(mm) L( mm) 1 0.60 0.042 14.12 2 0.71 0.21 13.81 3 0.73 0.30 13.77 4 0.73 0.30 13.77 5 0.71 0.21 13.81 6 0.60 0.042 14.12
  • 13.
  • 14. Microstrip Parallel Coupled Line Bandpass filter Design Based on even-odd Impedances's physical parameters simulation Graph
  • 15. Optimized and Tuned Physical Dimensions Resonators W ( mm) S(mm) L( mm) 1 0.32 0.125 13.88 2 0.63 0.21 13.88 3 0.125 0.26 13.63 4 0.125 0.26 13.63 5 0.63 0.21 13.88 6 0.32 0.125 13.88
  • 16.
  • 17. Microstrip Parallel Coupled Line Bandpass filter optimized and tuned Design S parameter Graph
  • 19. Layout generated from optimized schematic Design
  • 20. S-Parameter Graph of Layout generated from optimized schematic
  • 21. Optimized Layout Structure Tapered sections have been used to connect Quarter wavelength line
  • 22. Optimized Layout Graph (S- Parameter)
  • 25. Ansys HFSS Simulated Layout Graph
  • 26. Conclusion Requirement Outcome 3dB Bandwidth (3.75GHz – 4.25 GHz)= 0.5 GHz 3dB Bandwidth (3.73GHz- 4.23GHz)= 0.5 GHz Insertion Loss -1.50dB Return Loss Min- -13dB Max- -31.5dB Filter’s Layout dimension Length= 98.800mm Width = 5.46mm Further work to be carried out •Fabrication •Testing

Editor's Notes

  1. It is designed using QUCS Simulation Software
  2. It is designed using QUCS Simulation Software