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
- 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
- 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
- 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)
- 23. Ansys HFSS Simulated Layout
- 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
- 27. Thank You!