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1
DESIGN AND DEVELOPMENT OF MULTIBAND BANDPASS
FILTERS
2
CONTENTS
 INTRODUCTION
 OBJECTIVES
 STATUS OF WORK DONE
 CONCLUSION
 REFERENCES
3
1. INTRODUCTION
4
Multiband Bandpass Filter
 With the fast growth in modern wireless communication technology
to support various communication modes at different frequency band
in to a single unit is a challenging job for microwave researchers
 Multiband bandpass filter are the indispensable components for
integrating with different communication modes into one device
without interference.
 As a key component of the RF front-end, compact size and high-
performance multi-band BPFs are able to meet the growing demand
trend.
5
Multi band BPF
Fig. 1 Frequency response of Dual band BPF
Fig. 2 Frequency response of Triband BPF
Fig. 3 Frequency response of Quad band BPF
Fig. 4 Frequency response of Quint band BPF
TZ1
TZ2 TZ3
6
1. Insertion loss expressed in dB IL =
2. Return loss expressed in dB RL =
3. Fractional Bandwidth (FBW)(%) = (f2-f1)/fc
4. Roll-off Level
5. Relative stopband width
Performance Parameters
stopband bandwidth
stopband centre frequency
RSB 
7
6.Normalized circuit size
7. Suppression Factor
Performance Parameters
2
physical size (length x width)


g
NCS
Stopband suppression level
SF=
1 0
8
OPTIMUM CHARACTERISTICS OF MULTIBAND BANDPASS
FILTERS
 Low Insertion Loss in Passband.
 High Return loss in passband.
 Compactness and ease of Fabrication
 High Selectivity
 Flexible, Low cost, and weight
9
OBJECTIVES
1. Design of Novel Filter structure with improved total performance .
2. Optimization of structure using electromagnetic simulation software
such as Ansys HFSS and IE3D.
3. Fabricate the prototypes of developed filters for measurement using
vector network analyzer.
4. Develop equivalent circuit models for the optimized and developed
filters.
10
 Work 1: Simulation of Simple and compact size TBBPF on FR4.
“ Design and Optimization of Cost-Effective, Simple, and Miniature Tri-Band Bandpass Filter for
GSM, WLL, and WIFI Applications”- Presented in ICTEST 2024, and accepted for the
Publication in IEEE Xplore.
Status of Work done
11
 Work 2: “Design and Optimization of Simple, and Compact Tri-Band
Bandpass Filter for 5G Applications”
- Presented in International Conference in Signal Processing,
Instrumentation and Communication ‘SPICE 2K24’
 Work 3: Implementation of miniature, cost-effective, flexible and eco-
friendly Tri-band bandpass filter using a paper substrate
12
Design of Quint band bandpass filter using
Stub Loaded step Impedance Resonator
13
Design of Quint band bandpass filter using Stub
Loaded step Impedance Resonator
L1
L2
Ls
W2
2W1
Material: RT / Duroid 5880
Dielectric constant:2.2
Loss tangent :.0009
Thickness:.787mm
Parameters Dimension(
mm)
L1 36.1
L2 12.9
Ls 5.9
W1 4
W2 .3
t 9.8
g .2
14
Simulate S Parameter Responses
Pass band
CFs(GHz)
IL(dB) RL(dB)
1.49 0.43 22.25
2.65 0.75 23.89
4.15 1.01 11.21
4.74 1.99 20.98
5.9 1.07 28.62
15
@1.49GHz @2.65GHz @4.15 GHz @4.74GHz @5.9GHz
Surface current distribution at center frequency of passbands
16
Parametric Analysis
17
1. Parametric analysis of coupling space between resonators
18
Fig. Transmission and Reflection performance with different coupling space
0 1 2 3 4 5 6 7 8
-60
-50
-40
-30
-20
-10
0
g=0
.15
g=0
.2
Frequency(GHz)
S21(dB)
0 1 2 3 4 5 6 7 8
-60
-50
-40
-30
-20
-10
0
g=0
.15
g=0
.2
Frequency(GHz)
S11
(dB)
19
2. Parametric analysis with different Coupling and Feedings.
20
21
HIGHLIGHTS
Only two stub-loaded resonators are used for the design of the Quintband bandpass
filter.
Designed center frequencies at 1.49GHz,2.65GHz, 4.15 GHz,4.74GHz and 5.9 GHz.
Quint band bandpass filter can be applied for GPS,4G,Wimax and WLAN applications.
22
Publications
 “A review of the Design and Development of Microstrip Multiband
Bandpass Filter for 5G Systems” Journal of Applied Science,
Engineering, Technology and Management Vol. 02, Issue 02, December
2024 pp. 03 - 08
23
REFERENCES
[1] M Berka, A. Bendaoudi,K.Benkhallouk, Z. Mahdjoub & A. Y. Rouabhi “Designing of tri-band bandpass microwave
filter based on (E–Z) inter-coupled tapered metamaterial resonators for C- and X-band applications and operations”
Applied Physics A volume 128, Article number: 1112 (2022).
[2] Junjie Zhang, Qing Liu, Dongfang Zhou, Dewei Zhang “Single- and triple-band bandpass filters using novel perturbed
isosceles right-angled triangular SIW cavities” IET Microwaves, Antennas & PropagationVolume 15, Issue 3Feb
2021Pages241-355
[3] Haiwen Liu ,Yifan Wang, Pin Wen And Shaoyong Zheng “Novel Tri-Band High-Temperature Superconducting
Bandpass Filters Using Asymmetric Shunted-Line Stepped-Impedance Resonator (SLSIR)” 21 February 2019
IEEE Access ( Volume: 7) Pages 32504 – 32509
[4] MinhTan Doan; Wenquan Che; Phu Liem Nguyen “Tri-band bandpass filter using dual-mode resonators” The 2012
International Conference on Advanced Technologies for Communications DOI: 10.1109/ATC.2012.6404256
[5] Lei Chen, Jia Yi Peng, Min Wang, Tian Tian Zhang, Feng Wei “Compact balanced tri-band bandpass filter based on
stub loaded resonator with high selectivity” international Journal of RF and Microwave Computer-Aided Engineering
Volume 31, Issue 12Dec 2021
[6] Xue Ming Lin; Qing Xin Chu “Design of Triple-band Bandpass Filter Using Trn-section Stepped-Impedance
Resonators” 2007 International Conference on Microwave and Millimeter Wave Technology. DOI:
10.1109/ICMMT.2007.381479
24
[6] Xue Ming Lin; Qing Xin Chu “Design of Triple-band Bandpass Filter Using Trn-section Stepped-Impedance
Resonators” 2007 International Conference on Microwave and Millimeter Wave Technology. DOI:
10.1109/ICMMT.2007.381479
[7] Naoto Sekiya; Shunsuke Sugiyama “Design of Miniaturized HTS Dual-Band Bandpass Filters Using Stub-Loaded
Meander Line Resonators and Their Applications to Tri-Band Bandpass Filters” IEEE Transactions on Applied
Superconductivity ( Volume: 25, Issue: 3, June 2015) DOI: 10.1109/TASC.2014.2362352
[8] Yuanmo Lin, Min-Hang Weng, Ping Zhang & Ru-Yuan Yang “A tri-band filter with controllable frequency and
transmission zeros using dual-stubs loaded” Electromagnetics 2021, VOL. 41, NO. 2, 131–141
https://doi.org/10.1080/02726343.2021.1879360
[9] Milad Nosrati , Pejman Rezaei “Compact tunable tri-band bandpass filter using varactor diodes for wireless fidelity,
wireless local area network, and worldwide interoperability for microwaves access applications ” Int J RF Microw
Comput Aided Eng. 2022;32:e22935. Wiley online library .com / journal /mmce © 2021 Wiley Periodicals LLC. 1 of 9
https: //doi.org /10.1002 /mmce. 22935
[10] Ziyue Guo, Litian Wang, Rong Guo, Yang Xiong,Ming He, Lu Ji1, and Xu Zhang “Compact Differential Tri-Band
Bandpass Filter with Multiple Zeros Using Sext-Mode Stepped-Impedance Square Ring Loaded Resonator” Progress In
Electromagnetics Research C, Vol. 117, 73{87, 2021
25
[11] Sourav Moitra, Ranjan Dey “Design of Dual Band and Tri band Bandpass Filter (BPF)
‑
with Improved Inter band Isolation Using DGS Integrated Coupled Microstrip Lines Structures” Wireless Personal
‑
Communications (2020) 110:2019–2030 https://doi.org/10.1007/s11277-019-06827-8
[12] Yong Yang, Zanxian Wang,LeXu2, Yaxin Liu “A balanced tri-band bandpass filter with high selectivity and controllable
bandwidths” Int J RF Microw Comput Aided Eng. 2019;29:e21976. wileyonlinelibrary.com/journal/mmce © 2019 Wiley
Periodicals, Inc. 1 of 7 https://doi.org/10.1 002/ mmce.21976
[13] Sangkil Kim, Benjamin Cook, Taoran Le, James Cooper, Hoseon Lee, Vasileios Lakafosis, Rushi Vyas, Riccardo Moro,
Maurizio Bozzi, Apostolos Georgiadis, Ana Collado, Manos M. Tentzeris “Inkjet-printed antennas, sensors and circuits on
paper substrate” ET Microw. Antennas Propag., 2013, Vol. 7, Iss. 10, pp. 858–868doi:10.1049/iet-map.2012.0685
[14] “A Reconfigurable Inkjet-Printed Antenna on Paper Substrate for Wireless Applications”
Hattan F. Abutarboush; IEEE Antennas and Wireless Propagation Letters ( Volume: 17, Issue: 9, September 2018)
[15] Kanaparthi V. Phani Kumar , Vamsi Krizshna Velidi , Ayman A. Althuwayb , and T. Rama Rao ,
“Microstrip Dual-Band Bandpass Filter With Wide Bandwidth Using Paper Substrate” IEEE Microwave and wireless
communication letters, Vol.31, NO:7, July 2021
26
[16] Susila Mohandoss , Sandeep Kumar Palaniswamy, Rama Rao Thipparaju ,
Malathi Kanagasabai, Balarami
Reddy Bobbili Naga ,
Sachin Kumar “On the bending and time domain analysis of compact wideband flexible monopole
antennas”
AEU - International Journal of Electronics and Communications Volume 101, March 2019, Pages 168-181
[17] Y. Wang, C. Yan, S. Cheng, Z. Xu, X. Sun, Y. Xu, J. Chen, Z. Jiang, K. Liang, Z. Feng, “Flexible RFID tag metal antenna
on paper-based substrate by inkjet printing technology”, Advanced Functional Materials 29 (2019) 1902579.
doi:10.1002/adfm.201902579.
[18] Iman Jadidi, Mohammad A. Honarvar, and Farzad Khajeh-Khalili, “Compact Tri-Band Microstrip Filter Using Three
Types of Resonators for Bluetooth, WIMAX, and WLAN Applications”, Progress In Electromagnetics Research C, Vol. 91,
241–252, 2019
[19]Sheng-Fang Zhang, Li-TianWang1, Sheng-Hui Zhao, Jie Zhou, Zhi-Peng Wang, Xin Zhang, Xue-Lian Liang, Ming He,
and Lu Ji, “Design of Dual/Tri-Band BPF with Controllable Bandwidth Based on a Quintuple-Mode Resonator” Progress In
Electromagnetics Research Letters, Vol. 82, 129–137, 2019
27
THANK YOU

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Design and development of multiband bandpass filter

  • 1. 1 DESIGN AND DEVELOPMENT OF MULTIBAND BANDPASS FILTERS
  • 2. 2 CONTENTS  INTRODUCTION  OBJECTIVES  STATUS OF WORK DONE  CONCLUSION  REFERENCES
  • 4. 4 Multiband Bandpass Filter  With the fast growth in modern wireless communication technology to support various communication modes at different frequency band in to a single unit is a challenging job for microwave researchers  Multiband bandpass filter are the indispensable components for integrating with different communication modes into one device without interference.  As a key component of the RF front-end, compact size and high- performance multi-band BPFs are able to meet the growing demand trend.
  • 5. 5 Multi band BPF Fig. 1 Frequency response of Dual band BPF Fig. 2 Frequency response of Triband BPF Fig. 3 Frequency response of Quad band BPF Fig. 4 Frequency response of Quint band BPF TZ1 TZ2 TZ3
  • 6. 6 1. Insertion loss expressed in dB IL = 2. Return loss expressed in dB RL = 3. Fractional Bandwidth (FBW)(%) = (f2-f1)/fc 4. Roll-off Level 5. Relative stopband width Performance Parameters stopband bandwidth stopband centre frequency RSB 
  • 7. 7 6.Normalized circuit size 7. Suppression Factor Performance Parameters 2 physical size (length x width)   g NCS Stopband suppression level SF= 1 0
  • 8. 8 OPTIMUM CHARACTERISTICS OF MULTIBAND BANDPASS FILTERS  Low Insertion Loss in Passband.  High Return loss in passband.  Compactness and ease of Fabrication  High Selectivity  Flexible, Low cost, and weight
  • 9. 9 OBJECTIVES 1. Design of Novel Filter structure with improved total performance . 2. Optimization of structure using electromagnetic simulation software such as Ansys HFSS and IE3D. 3. Fabricate the prototypes of developed filters for measurement using vector network analyzer. 4. Develop equivalent circuit models for the optimized and developed filters.
  • 10. 10  Work 1: Simulation of Simple and compact size TBBPF on FR4. “ Design and Optimization of Cost-Effective, Simple, and Miniature Tri-Band Bandpass Filter for GSM, WLL, and WIFI Applications”- Presented in ICTEST 2024, and accepted for the Publication in IEEE Xplore. Status of Work done
  • 11. 11  Work 2: “Design and Optimization of Simple, and Compact Tri-Band Bandpass Filter for 5G Applications” - Presented in International Conference in Signal Processing, Instrumentation and Communication ‘SPICE 2K24’  Work 3: Implementation of miniature, cost-effective, flexible and eco- friendly Tri-band bandpass filter using a paper substrate
  • 12. 12 Design of Quint band bandpass filter using Stub Loaded step Impedance Resonator
  • 13. 13 Design of Quint band bandpass filter using Stub Loaded step Impedance Resonator L1 L2 Ls W2 2W1 Material: RT / Duroid 5880 Dielectric constant:2.2 Loss tangent :.0009 Thickness:.787mm Parameters Dimension( mm) L1 36.1 L2 12.9 Ls 5.9 W1 4 W2 .3 t 9.8 g .2
  • 14. 14 Simulate S Parameter Responses Pass band CFs(GHz) IL(dB) RL(dB) 1.49 0.43 22.25 2.65 0.75 23.89 4.15 1.01 11.21 4.74 1.99 20.98 5.9 1.07 28.62
  • 15. 15 @1.49GHz @2.65GHz @4.15 GHz @4.74GHz @5.9GHz Surface current distribution at center frequency of passbands
  • 17. 17 1. Parametric analysis of coupling space between resonators
  • 18. 18 Fig. Transmission and Reflection performance with different coupling space 0 1 2 3 4 5 6 7 8 -60 -50 -40 -30 -20 -10 0 g=0 .15 g=0 .2 Frequency(GHz) S21(dB) 0 1 2 3 4 5 6 7 8 -60 -50 -40 -30 -20 -10 0 g=0 .15 g=0 .2 Frequency(GHz) S11 (dB)
  • 19. 19 2. Parametric analysis with different Coupling and Feedings.
  • 20. 20
  • 21. 21 HIGHLIGHTS Only two stub-loaded resonators are used for the design of the Quintband bandpass filter. Designed center frequencies at 1.49GHz,2.65GHz, 4.15 GHz,4.74GHz and 5.9 GHz. Quint band bandpass filter can be applied for GPS,4G,Wimax and WLAN applications.
  • 22. 22 Publications  “A review of the Design and Development of Microstrip Multiband Bandpass Filter for 5G Systems” Journal of Applied Science, Engineering, Technology and Management Vol. 02, Issue 02, December 2024 pp. 03 - 08
  • 23. 23 REFERENCES [1] M Berka, A. Bendaoudi,K.Benkhallouk, Z. Mahdjoub & A. Y. Rouabhi “Designing of tri-band bandpass microwave filter based on (E–Z) inter-coupled tapered metamaterial resonators for C- and X-band applications and operations” Applied Physics A volume 128, Article number: 1112 (2022). [2] Junjie Zhang, Qing Liu, Dongfang Zhou, Dewei Zhang “Single- and triple-band bandpass filters using novel perturbed isosceles right-angled triangular SIW cavities” IET Microwaves, Antennas & PropagationVolume 15, Issue 3Feb 2021Pages241-355 [3] Haiwen Liu ,Yifan Wang, Pin Wen And Shaoyong Zheng “Novel Tri-Band High-Temperature Superconducting Bandpass Filters Using Asymmetric Shunted-Line Stepped-Impedance Resonator (SLSIR)” 21 February 2019 IEEE Access ( Volume: 7) Pages 32504 – 32509 [4] MinhTan Doan; Wenquan Che; Phu Liem Nguyen “Tri-band bandpass filter using dual-mode resonators” The 2012 International Conference on Advanced Technologies for Communications DOI: 10.1109/ATC.2012.6404256 [5] Lei Chen, Jia Yi Peng, Min Wang, Tian Tian Zhang, Feng Wei “Compact balanced tri-band bandpass filter based on stub loaded resonator with high selectivity” international Journal of RF and Microwave Computer-Aided Engineering Volume 31, Issue 12Dec 2021 [6] Xue Ming Lin; Qing Xin Chu “Design of Triple-band Bandpass Filter Using Trn-section Stepped-Impedance Resonators” 2007 International Conference on Microwave and Millimeter Wave Technology. DOI: 10.1109/ICMMT.2007.381479
  • 24. 24 [6] Xue Ming Lin; Qing Xin Chu “Design of Triple-band Bandpass Filter Using Trn-section Stepped-Impedance Resonators” 2007 International Conference on Microwave and Millimeter Wave Technology. DOI: 10.1109/ICMMT.2007.381479 [7] Naoto Sekiya; Shunsuke Sugiyama “Design of Miniaturized HTS Dual-Band Bandpass Filters Using Stub-Loaded Meander Line Resonators and Their Applications to Tri-Band Bandpass Filters” IEEE Transactions on Applied Superconductivity ( Volume: 25, Issue: 3, June 2015) DOI: 10.1109/TASC.2014.2362352 [8] Yuanmo Lin, Min-Hang Weng, Ping Zhang & Ru-Yuan Yang “A tri-band filter with controllable frequency and transmission zeros using dual-stubs loaded” Electromagnetics 2021, VOL. 41, NO. 2, 131–141 https://doi.org/10.1080/02726343.2021.1879360 [9] Milad Nosrati , Pejman Rezaei “Compact tunable tri-band bandpass filter using varactor diodes for wireless fidelity, wireless local area network, and worldwide interoperability for microwaves access applications ” Int J RF Microw Comput Aided Eng. 2022;32:e22935. Wiley online library .com / journal /mmce © 2021 Wiley Periodicals LLC. 1 of 9 https: //doi.org /10.1002 /mmce. 22935 [10] Ziyue Guo, Litian Wang, Rong Guo, Yang Xiong,Ming He, Lu Ji1, and Xu Zhang “Compact Differential Tri-Band Bandpass Filter with Multiple Zeros Using Sext-Mode Stepped-Impedance Square Ring Loaded Resonator” Progress In Electromagnetics Research C, Vol. 117, 73{87, 2021
  • 25. 25 [11] Sourav Moitra, Ranjan Dey “Design of Dual Band and Tri band Bandpass Filter (BPF) ‑ with Improved Inter band Isolation Using DGS Integrated Coupled Microstrip Lines Structures” Wireless Personal ‑ Communications (2020) 110:2019–2030 https://doi.org/10.1007/s11277-019-06827-8 [12] Yong Yang, Zanxian Wang,LeXu2, Yaxin Liu “A balanced tri-band bandpass filter with high selectivity and controllable bandwidths” Int J RF Microw Comput Aided Eng. 2019;29:e21976. wileyonlinelibrary.com/journal/mmce © 2019 Wiley Periodicals, Inc. 1 of 7 https://doi.org/10.1 002/ mmce.21976 [13] Sangkil Kim, Benjamin Cook, Taoran Le, James Cooper, Hoseon Lee, Vasileios Lakafosis, Rushi Vyas, Riccardo Moro, Maurizio Bozzi, Apostolos Georgiadis, Ana Collado, Manos M. Tentzeris “Inkjet-printed antennas, sensors and circuits on paper substrate” ET Microw. Antennas Propag., 2013, Vol. 7, Iss. 10, pp. 858–868doi:10.1049/iet-map.2012.0685 [14] “A Reconfigurable Inkjet-Printed Antenna on Paper Substrate for Wireless Applications” Hattan F. Abutarboush; IEEE Antennas and Wireless Propagation Letters ( Volume: 17, Issue: 9, September 2018) [15] Kanaparthi V. Phani Kumar , Vamsi Krizshna Velidi , Ayman A. Althuwayb , and T. Rama Rao , “Microstrip Dual-Band Bandpass Filter With Wide Bandwidth Using Paper Substrate” IEEE Microwave and wireless communication letters, Vol.31, NO:7, July 2021
  • 26. 26 [16] Susila Mohandoss , Sandeep Kumar Palaniswamy, Rama Rao Thipparaju , Malathi Kanagasabai, Balarami Reddy Bobbili Naga , Sachin Kumar “On the bending and time domain analysis of compact wideband flexible monopole antennas” AEU - International Journal of Electronics and Communications Volume 101, March 2019, Pages 168-181 [17] Y. Wang, C. Yan, S. Cheng, Z. Xu, X. Sun, Y. Xu, J. Chen, Z. Jiang, K. Liang, Z. Feng, “Flexible RFID tag metal antenna on paper-based substrate by inkjet printing technology”, Advanced Functional Materials 29 (2019) 1902579. doi:10.1002/adfm.201902579. [18] Iman Jadidi, Mohammad A. Honarvar, and Farzad Khajeh-Khalili, “Compact Tri-Band Microstrip Filter Using Three Types of Resonators for Bluetooth, WIMAX, and WLAN Applications”, Progress In Electromagnetics Research C, Vol. 91, 241–252, 2019 [19]Sheng-Fang Zhang, Li-TianWang1, Sheng-Hui Zhao, Jie Zhou, Zhi-Peng Wang, Xin Zhang, Xue-Lian Liang, Ming He, and Lu Ji, “Design of Dual/Tri-Band BPF with Controllable Bandwidth Based on a Quintuple-Mode Resonator” Progress In Electromagnetics Research Letters, Vol. 82, 129–137, 2019