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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)
Duration : 6th march 2023 to 6th September 2023
WBL Co-Ordinator Presented By:
Dr.Satyajit Chakraborty Gaurav Bharti
Scientist E
SAMEER Kolkata Center
Supervisor:
Mr. Dhruba Das
Scientist D
SAMEER Kolkata Center
Objective
Design of 5th Order Parallel Coupled
Microstrip Band pass filter
Proposed 5th order
filter operates at the centre frequency of 10.4 GHz with FBW less
than 10% and possesses characteristics of chebyshev
response with a passband ripple of 0.2dB. The five resonators
are provided by the quarter wavelength coupled lines.
Simulation is carried out Using EDA Tool Advanced Design System
(ADS) and the proposed Layout structure possesses S11 of
greater than -20 dB for 5 resonant modes which further needs to
be optimized for better Layout result.
INTRODUCTION
A Microwave Band Pass filter (BPF) is the key component in wireless communication systems. It is a two port
reciprocal, passive device which attenuates undesirable signal frequency, thereby facilitating the transmission of
desired signal frequencies. The practical band pass filters have small non – zero attenuation in pass band and a small
signal output in stop band due to the presence of resistive losses in reactive elements and propagating medium
Such filters find extensive applications in wireless communication systems as they eliminates spurious signals, reduces
harmonics and facilitates better reception . In designing filter, microstrip transmission line structures are preferred over
lumped components.
The design of filter using
microstrip structure uses various methods such as Richard’s transformation, Kuroda’s identities, immitance inverters
etc. However parallel coupled microstrip line configuration is mostly preferred over its contemporaries for its
compact structure and compliance.In addition, it has several advantages such as flexible design, Bandwidth
stability over other filters.
filter Design specification:
• Lower Frequency :- 10.2 GHz
• Upper Frequency : 10.6 GHz
• Centre Frequency: 10.4GHz
• Attenuation required : -50dB at 12.4 GHz
• Order of the Filter (N): 5
• Fractional BW: 3.846%
(0.03846153846)
• Passband Ripple: 0.2dB
• Prototype: Chebyshev
• Dielectric constant: 3.55 (RO4003)/
• tan delta 0.0027
• Height of the Substrate 8mil
Lumped Circuit Design
Simulation Graph of Lumped Circuit Design
Calculation
Calculation of Admittance Inverter & even – Odd Impedance
N g values (0.2dB ripple)
1 1.3394
2 1.3370
3 2.1660
4 1.3370
5 1.3394
6 1.0000
SN (ZoJ) Admittance inverter Zoe(even impedance) Zoo ( odd Impedance)
J01 0.2123283598 62.87058461 41.63774863
J12 0.04512377796 52.35799666 47.84561887
J23 0.03548390229 51.83715048 48.28876025
J34 0.03548390229 51.83715048 48.28876025
J45 0.04512377796 52.35799666 47.84561887
J56 0.2123283598 62.87058461 41.63774863
Simulation Graph of S-parameter of ideal CLIN Schematic design
The next step of the filter Design is to find dimensions of Coupled Microstrip
Lines that exhibit the Desired even – and odd impedance . 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
SL W ( mm) S(mm) L( mm)
1 0.38 0.11 4.43
2 0.42 0.58 4.35
3 0.42 0.78 4.36
4 0.42 0.78 4.36
5 0.42 0.58 4.35
6 0.38 0.11 4.43
Optimized and Tuned Physical
Dimensions
SN W ( mm) S(mm) L( mm)
1 0.24 0.09 4.47
2 0.42 0.29 4.35
3 0.47 0.36 4.33
4 0.47 0.36 4.33
5 0.42 0.29 4.35
6 0.24 0.09 4.47
Layout Structure
Layout Graph (S- Parameter)
Thank You!

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Microstrip Bandpass Filter Design using EDA Tolol such as keysight ADS and Ansys HFSS

  • 1. Society for Applied Microwave Electronics Engineering & Research Kolkata Center Ministry of Electronics & Information Technology Government of India Work based Learning (WBL) Duration : 6th march 2023 to 6th September 2023 WBL Co-Ordinator Presented By: Dr.Satyajit Chakraborty Gaurav Bharti Scientist E SAMEER Kolkata Center Supervisor: Mr. Dhruba Das Scientist D SAMEER Kolkata Center
  • 2. Objective Design of 5th Order Parallel Coupled Microstrip Band pass filter Proposed 5th order filter operates at the centre frequency of 10.4 GHz with FBW less than 10% and possesses characteristics of chebyshev response with a passband ripple of 0.2dB. The five resonators are provided by the quarter wavelength coupled lines. Simulation is carried out Using EDA Tool Advanced Design System (ADS) and the proposed Layout structure possesses S11 of greater than -20 dB for 5 resonant modes which further needs to be optimized for better Layout result.
  • 3. INTRODUCTION A Microwave Band Pass filter (BPF) is the key component in wireless communication systems. It is a two port reciprocal, passive device which attenuates undesirable signal frequency, thereby facilitating the transmission of desired signal frequencies. The practical band pass filters have small non – zero attenuation in pass band and a small signal output in stop band due to the presence of resistive losses in reactive elements and propagating medium Such filters find extensive applications in wireless communication systems as they eliminates spurious signals, reduces harmonics and facilitates better reception . In designing filter, microstrip transmission line structures are preferred over lumped components. The design of filter using microstrip structure uses various methods such as Richard’s transformation, Kuroda’s identities, immitance inverters etc. However parallel coupled microstrip line configuration is mostly preferred over its contemporaries for its compact structure and compliance.In addition, it has several advantages such as flexible design, Bandwidth stability over other filters.
  • 4. filter Design specification: • Lower Frequency :- 10.2 GHz • Upper Frequency : 10.6 GHz • Centre Frequency: 10.4GHz • Attenuation required : -50dB at 12.4 GHz • Order of the Filter (N): 5 • Fractional BW: 3.846% (0.03846153846) • Passband Ripple: 0.2dB • Prototype: Chebyshev • Dielectric constant: 3.55 (RO4003)/ • tan delta 0.0027 • Height of the Substrate 8mil
  • 6. Simulation Graph of Lumped Circuit Design
  • 8. Calculation of Admittance Inverter & even – Odd Impedance N g values (0.2dB ripple) 1 1.3394 2 1.3370 3 2.1660 4 1.3370 5 1.3394 6 1.0000 SN (ZoJ) Admittance inverter Zoe(even impedance) Zoo ( odd Impedance) J01 0.2123283598 62.87058461 41.63774863 J12 0.04512377796 52.35799666 47.84561887 J23 0.03548390229 51.83715048 48.28876025 J34 0.03548390229 51.83715048 48.28876025 J45 0.04512377796 52.35799666 47.84561887 J56 0.2123283598 62.87058461 41.63774863
  • 9.
  • 10. Simulation Graph of S-parameter of ideal CLIN Schematic design
  • 11. The next step of the filter Design is to find dimensions of Coupled Microstrip Lines that exhibit the Desired even – and odd impedance . 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 SL W ( mm) S(mm) L( mm) 1 0.38 0.11 4.43 2 0.42 0.58 4.35 3 0.42 0.78 4.36 4 0.42 0.78 4.36 5 0.42 0.58 4.35 6 0.38 0.11 4.43
  • 13.
  • 14.
  • 15. Optimized and Tuned Physical Dimensions SN W ( mm) S(mm) L( mm) 1 0.24 0.09 4.47 2 0.42 0.29 4.35 3 0.47 0.36 4.33 4 0.47 0.36 4.33 5 0.42 0.29 4.35 6 0.24 0.09 4.47
  • 16.
  • 17.
  • 19. Layout Graph (S- Parameter)

Editor's Notes

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