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2026-04-05
High Q-Factor Permittivity Sensor with Dual-Band and Independent Performance for Solid Material Characterization
By
Progress In Electromagnetics Research C, Vol. 168, 104-116, 2026
Abstract
This study proposes a two-port dual-band microwave sensor designed for the independent and simultaneous detection of solid material characteristics. The sensor consists of a pair of non-identical rectangle-shaped resonators arranged symmetrically, with two distinct sensing areas connected by a power divider and a microstrip feed line with an impedance of 50 Ohms. It operates at resonant frequencies of fr1 = 2.16 GHz and fr2 = 4.03 GHz, utilizing a Rogers 5880 substrate with εr = 2.2, tanδ = 0.0009, and a thickness of 0.79 mm. The tested materials include RO5880, RO4350, and FR4, with dimensions of 16 mm × 5 mm on the first resonator and 5 mm × 5 mm on the second resonator. The rectangular resonators successfully detect and measure the dielectric properties of solid materials while maintaining independent operation, ensuring that MUT loading does not interfere with each resonator. The measurement results indicate that fr1 and fr2 achieve average accuracies of 90.51% and 95.16%, respectively, for a permittivity range of 1-4.4, while the average normalized sensitivities are 2.42% and 1.36%. In addition, the Q-factors of resonators are 308 and 537, respectively. The proposed microwave sensor offers a promising solution for accurately detecting different characteristics of solid materials independently and simultaneously, with potential applications in the food industry, material quality control, and biomedical fields.
Citation
Leni Devera Asrar, Zahriladha Zakaria, Syah Alam, Iwan Setyadi, and Maizatul Alice Meor Said, "High Q-Factor Permittivity Sensor with Dual-Band and Independent Performance for Solid Material Characterization," Progress In Electromagnetics Research C, Vol. 168, 104-116, 2026.
doi:10.2528/PIERC25090501
References

1. Navaei, Moein, Pejman Rezaei, and Sina Kiani, "Microwave split ring resonator sensor for determination of the fluids permittivity with measurement of human milk samples," Radio Science, Vol. 57, No. 7, 1-11, Jul. 2022.
doi:10.1029/2022rs007435        Google Scholar

2. Alahnomi, Rammah A., Zahriladha Zakaria, Maizatul Alice Meor Said, Zulkalnain Mohd Yussof, Ammar Alhegazi, Hussein Alsariera, and Norhanani Abd Rahman, "Enhanced T-resonator with blazed grating for accurate powder material characterization," 2020 IEEE International RF and Microwave Conference (RFM), 1-4, Kuala Lumpur, Malaysia, Dec. 14-16, 2020.
doi:10.1109/RFM50841.2020.9344733

3. Al-Gburi, Ahmed Jamal Abdullah, Zahriladha Zakaria, Imran Mohd Ibrahim, Rahmi S. Aswir, and Syah Alam, "Solid characterization utilizing planar microwave resonator sensor," Applied Computational Electromagnetics Society Journal (ACES), Vol. 37, No. 2, 222-228, Feb. 2022.
doi:10.13052/2022.aces.j.370211        Google Scholar

4. Al-Gburi, Ahmed Jamal Abdullah, Zahriladha Zakaria, Norhanani Abd Rahman, Ayman A. Althuwayb, Imran Mohd Ibrahim, Tale Saeidi, Zaheer Ahmed Dayo, and Sarosh Ahmad, "A miniaturized and highly sensitive microwave sensor based on CSRR for characterization of liquid materials," Materials, Vol. 16, No. 9, 3416, 2023.
doi:10.3390/ma16093416        Google Scholar

5. Buragohain, Akash, Abu Tahir Talat Mostako, and Gouree Shankar Das, "Low-cost CSRR based sensor for determination of dielectric constant of liquid samples," IEEE Sensors Journal, Vol. 21, No. 24, 27450-27457, Dec. 2021.
doi:10.1109/jsen.2021.3124329        Google Scholar

6. Gulsu, Mustafa Suphi, Fulya Bagci, Sultan Can, Asim Egemen Yilmaz, and Baris Akaoglu, "Minkowski-like fractal resonator-based dielectric sensor for estimating the complex permittivity of binary mixtures of ethanol, methanol and water," Sensors and Actuators A: Physical, Vol. 330, 112841, 2021.
doi:10.1016/j.sna.2021.112841        Google Scholar

7. Wu, Wen-Jing, Wen-Sheng Zhao, and Wensong Wang, "A microwave sensing system combination of interdigital structure (IDS)-based microstrip line and RF circuits for extracting complex permittivity of liquid samples," Sensors and Actuators A: Physical, Vol. 378, 115860, Nov. 2024.
doi:10.1016/j.sna.2024.115860        Google Scholar

8. Amer, Rayan A. Ba, Maizatul Alice Meor Said, Muhammad Syaheer Mohideen Ghani, Mohamad Harris Misran, Mohd Azlishah Othman, Shadia Suhaimi, and Nurmala Irdawaty Hassan, "High responsive microwave resonator sensor for material characterization," International Journal of Academic Research in Business and Social Sciences, Vol. 14, No. 10, 552-564, 2024.
doi:10.6007/ijarbss/v14-i10/23123        Google Scholar

9. Morales-Lovera, Hector-Noel, Jose-Luis Olvera-Cervantes, Aldo-Eleazar Perez-Ramos, Alonso Corona-Chavez, and Carlos E. Saavedra, "Microstrip sensor and methodology for the determination of complex anisotropic permittivity using perturbation techniques," Scientific Reports, Vol. 12, No. 1, 2205, 2022.
doi:10.1038/s41598-022-06259-8        Google Scholar

10. Wang, Cong, Luqman Ali, Fan-Yi Meng, Kishor Kumar Adhikari, Zhong Liang Zhou, Yu Chen Wei, Dan Qing Zou, and He Yu, "High-accuracy complex permittivity characterization of solid materials using parallel interdigital capacitor-based planar microwave sensor," IEEE Sensors Journal, Vol. 21, No. 5, 6083-6093, Mar. 2021.
doi:10.1109/jsen.2020.3041014        Google Scholar

11. Mohammadi, Pejman, Ali Mohammadi, and Ali Kara, "Enhanced half-mode SIW loaded with interdigital capacitor for permittivity measurements," IEEE Transactions on Instrumentation and Measurement, Vol. 72, 1-8, 2023.
doi:10.1109/tim.2023.3265745        Google Scholar

12. Liu, Qingqing, Hui Deng, Ping Meng, and Haoning Sun, "High sensitivity sensor loaded with octagonal spiral resonators for retrieval of solid material permittivity," IEEE Sensors Journal, Vol. 21, No. 18, 20010-20017, Sep. 2021.
doi:10.1109/jsen.2021.3099298        Google Scholar

13. S, Aiswarya, Sreedevi K. Menon, Massimo Donelli, and Meenu L, "Development of a microwave sensor for solid and liquid substances based on closed loop resonator," Sensors, Vol. 21, No. 24, 8506, 2021.
doi:10.3390/s21248506        Google Scholar

14. Yang, Libo, Hairong Kou, Xiaoli Wang, Xiaoyong Zhang, Zhenzhen Shang, Junbing Shi, Guanghua Zhang, and Zhiguo Gui, "A microwave pressure sensor loaded with complementary split ring resonator for high-temperature applications," Micromachines, Vol. 14, No. 3, 635, Mar. 2023.
doi:10.3390/mi14030635        Google Scholar

15. Acevedo-Osorio, Gabriel, Erick Reyes-Vera, and Humberto Lobato-Morales, "Dual-band microstrip resonant sensor for dielectric measurement of liquid materials," IEEE Sensors Journal, Vol. 20, No. 22, 13371-13378, Nov. 2020.
doi:10.1109/jsen.2020.3005185        Google Scholar

16. Al-Gburi, Ahmed Jamal Abdullah, Norhanani Abd Rahman, Zahriladha Zakaria, and Muhammad Firdaus Akbar, "Realizing the high Q-factor of a CSIW microwave resonator based on an MDGS for semisolid material characterization," Micromachines, Vol. 14, No. 5, 922, 2023.
doi:10.3390/mi14050922        Google Scholar

17. Bagci, Fulya, Mustafa Suphi Gulsu, and Baris Akaoglu, "Dual-band measurement of complex permittivity in a microwave waveguide with a flexible, thin and sensitive metamaterial-based sensor," Sensors and Actuators A: Physical, Vol. 338, 113480, May 2022.
doi:10.1016/j.sna.2022.113480        Google Scholar

18. Muñoz-Enano, Jonathan, Paris Vélez, Marta Gil, and Ferran Martín, "Planar microwave resonant sensors: A review and recent developments," Applied Sciences, Vol. 10, No. 7, 2615, Apr. 2020.
doi:10.3390/app10072615        Google Scholar

19. Al-Gburi, Ahmed Jamal Abdullah, Zahriladha Zakaria, Norhanani Abd Rahman, Syah Alam, and Maizatul Alice Meor Said, "A compact and low-profile curve-feed complementary split-ring resonator microwave sensor for solid material detection," Micromachines, Vol. 14, No. 2, 384, Feb. 2023.
doi:10.3390/mi14020384        Google Scholar

20. Jang, Chorom, Jin-Kwan Park, Hee-Jo Lee, Gi-Ho Yun, and Jong-Gwan Yook, "Temperature-corrected fluidic glucose sensor based on microwave resonator," Sensors, Vol. 18, No. 11, 3850, Nov. 2018.
doi:10.3390/s18113850        Google Scholar

21. Abd Rahman, Norhanani, Zahriladha Zakaria, Rosemizi Abd Rahim, Maizatul Alice Meor Said, Amyrul Azuan Mohd Bahar, Rammah A. Alahnomi, and Ammar Alhegazi, "High quality factor using nested complementary split ring resonator for dielectric properties of solids sample," Applied Computational Electromagnetics Society Journal (ACES), Vol. 35, No. 10, 1222-1227, Oct. 2020.
doi:10.47037/2020.aces.j.351016        Google Scholar

22. Oliveira, João G. D., Erica N. M. G. Pinto, Valdemir P. Silva Neto, and Adaildo G. D’Assunção, "CSRR-based microwave sensor for dielectric materials characterization applied to soil water content determination," Sensors, Vol. 20, No. 1, 255, Jan. 2020.
doi:10.3390/s20010255        Google Scholar

23. Vélez, Paris, Jonathan Muñoz-Enano, Amir Ebrahimi, Cristian Herrojo, Ferran Paredes, James Scott, Kamran Ghorbani, and Ferran Martín, "Single-frequency amplitude-modulation sensor for dielectric characterization of solids and microfluidics," IEEE Sensors Journal, Vol. 21, No. 10, 12189-12201, 2021.
doi:10.1109/jsen.2021.3062290        Google Scholar

24. Said, Maizatul Alice Meor, Zahriladha Zakaria, Mohamad Harris Misran, Mohd Azlishah Bin Othman, Redzuan Abdul Manap, Abd Shukur Bin Jaafar, Shadia Suhaimi, and Nurmala Irdawaty Hassan, "Planar microwave sensor with high sensitivity for material characterization based on square split ring resonator (SSRR) for solid and liquid," EMITTER International Journal of Engineering Technology, 60-75, 2023.
doi:10.24003/emitter.v11i1.758        Google Scholar

25. Zidane, Mohamed Amine, Amar Rouane, Cherif Hamouda, and Hichem Amar, "Hyper-sensitive microwave sensor based on split ring resonator (SRR) for glucose measurement in water," Sensors and Actuators A: Physical, Vol. 321, 112601, Apr. 2021.
doi:10.1016/j.sna.2021.112601        Google Scholar

26. Ali, Luqman, Cong Wang, Inam Ullah, Adnan Yousaf, Wali Ullah Khan, Shafi Ullah, Rahim Khan, Fawaz Alassery, Habib Hamam, and Muhammad Shafiq, "Design and optimization of microwave sensor for the non-contact measurement of pure dielectric materials," Electronics, Vol. 10, No. 24, 3057, Dec. 2021.
doi:10.3390/electronics10243057        Google Scholar

27. Soltan, Abbas, R. A. Sadeghzadeh, and S. Mohammad-Ali-Nezhad, "Microwave sensor for liquid classification and permittivity estimation of dielectric materials," Sensors and Actuators A: Physical, Vol. 336, 113397, Apr. 2022.
doi:10.1016/j.sna.2022.113397        Google Scholar

28. Xie, Jianbing, Junjie Wen, Junwu Chen, and Weizheng Yuan, "Microwave icing sensor based on interdigital-complementary split-ring resonator," IEEE Sensors Journal, Vol. 22, No. 13, 12829-12837, 2022.
doi:10.1109/jsen.2022.3176932        Google Scholar

29. Haq, Tanveerul, Cunjun Ruan, Xingyun Zhang, Shahid Ullah, Ayesha Kosar Fahad, and Wenlong He, "Extremely sensitive microwave sensor for evaluation of dielectric characteristics of low-permittivity materials," Sensors, Vol. 20, No. 7, 1916, Mar. 2020.
doi:10.3390/s20071916        Google Scholar

30. Armghan, Ammar, Turki M. Alanazi, Ahsan Altaf, and Tanveerul Haq, "Characterization of dielectric substrates using dual band microwave sensor," IEEE Access, Vol. 9, 62779-62787, 2021.
doi:10.1109/access.2021.3075246        Google Scholar

31. Javed, Ahmed, Ali Arif, Muhammad Zubair, Muhammad Qasim Mehmood, and Kashif Riaz, "A low-cost multiple complementary split-ring resonator-based microwave sensor for contactless dielectric characterization of liquids," IEEE Sensors Journal, Vol. 20, No. 19, 11326-11334, Oct. 2020.
doi:10.1109/jsen.2020.2998004        Google Scholar

32. Kiani, Sina, Pejman Rezaei, and Moein Navaei, "Dual-sensing and dual-frequency microwave SRR sensor for liquid samples permittivity detection," Measurement, Vol. 160, 107805, 2020.
doi:10.1016/j.measurement.2020.107805        Google Scholar

33. Shafi, K. T. Muhammed, Abhishek Kumar Jha, and M. Jaleel Akhtar, "Dual band RF sensor for testing of magnetic properties of materials using meandered line SRR," Sensors and Actuators A: Physical, Vol. 272, 170-177, Apr. 2018.
doi:10.1016/j.sna.2018.01.011        Google Scholar

34. Buragohain, Akash, Gouree Shankar Das, Yatish Beria, Ahmed Jamal Abdullah Al-Gburi, Partha Protim Kalita, and Trishna Doloi, "Highly sensitive differential hexagonal split ring resonator sensor for material characterization," Sensors and Actuators A: Physical, Vol. 363, 114704, Dec. 2023.
doi:10.1016/j.sna.2023.114704        Google Scholar

35. Liu, Weina, Junjie Zhang, and Kama Huang, "Dual-band microwave sensor based on planar rectangular cavity loaded with pairs of improved resonator for differential sensing applications," IEEE Transactions on Instrumentation and Measurement, Vol. 70, 1-8, 2021.
doi:10.1109/tim.2021.3118090        Google Scholar

36. Anggradinata, Habib Nurseha and Muhamad Asvial, "Multifunctional dual-band microwave sensor for the detection of liquid permittivity and solid displacement," Progress In Electromagnetics Research C, Vol. 152, 131-141, 2025.
doi:10.2528/pierc24111104        Google Scholar

37. Shi, Haoyang, Xuchun Zhang, Lin Huang, Kun Wang, and Zanyang Wang, "Dual-band planar microwave solid complex dielectric constant sensor system based on E-interdigital structure," Sensors, Vol. 25, No. 18, 5789, Sep. 2025.
doi:10.3390/s25185789        Google Scholar

38. Alam, Syah, Zahriladha Zakaria, Indra Surjati, Noor Azwan Shairi, Mudrik Alaydrus, and Teguh Firmansyah, "Dual-band independent permittivity sensor using single-port with a pair of U-shaped structures for solid material detection," IEEE Sensors Journal, Vol. 22, No. 16, 16111-16119, Aug. 2022.
doi:10.1109/jsen.2022.3191345        Google Scholar

39. Alam, Syah, Zahriladha Zakaria, Indra Surjati, Noor Azwan Shairi, Mudrik Alaydrus, and Teguh Firmansyah, "Integrated microwave sensor and antenna sensor based on dual T-shaped resonator structures for contact and noncontact characterization of solid material," IEEE Sensors Journal, Vol. 23, No. 12, 13010-13018, Jun. 2023.
doi:10.1109/jsen.2023.3273008        Google Scholar

40. Pozar, David M., Microwave Engineering, John Wiley & Sons, 2012.

41. Joler, Miroslav, Alex Noel Joseph Raj, and Juraj Bartolić, "A simplified measurement configuration for evaluation of relative permittivity using a microstrip ring resonator with a variational method-based algorithm," Sensors, Vol. 22, No. 3, 928, 2022.
doi:10.3390/s22030928        Google Scholar

42. Hanif, Abu, Mohammad Tariqul Islam, Mohammad Lutful Hakim, Touhidul Alam, Haitham Alsaif, Abdulwadoud A. Maash, Mohamed S. Soliman, and Md. Shabiul Islam, "Compact maze-shaped meta resonator for high-sensitive S-band low permittivity characterization," Sensing and Bio-Sensing Research, Vol. 45, 100655, Aug. 2024.
doi:10.1016/j.sbsr.2024.100655        Google Scholar