Vol. 109
Latest Volume
All Volumes
PIERM 115 [2023] PIERM 114 [2022] PIERM 113 [2022] PIERM 112 [2022] PIERM 111 [2022] PIERM 110 [2022] PIERM 109 [2022] PIERM 108 [2022] PIERM 107 [2022] PIERM 106 [2021] PIERM 105 [2021] PIERM 104 [2021] PIERM 103 [2021] PIERM 102 [2021] PIERM 101 [2021] PIERM 100 [2021] PIERM 99 [2021] PIERM 98 [2020] PIERM 97 [2020] PIERM 96 [2020] PIERM 95 [2020] PIERM 94 [2020] PIERM 93 [2020] PIERM 92 [2020] PIERM 91 [2020] PIERM 90 [2020] PIERM 89 [2020] PIERM 88 [2020] PIERM 87 [2019] PIERM 86 [2019] PIERM 85 [2019] PIERM 84 [2019] PIERM 83 [2019] PIERM 82 [2019] PIERM 81 [2019] PIERM 80 [2019] PIERM 79 [2019] PIERM 78 [2019] PIERM 77 [2019] PIERM 76 [2018] PIERM 75 [2018] PIERM 74 [2018] PIERM 73 [2018] PIERM 72 [2018] PIERM 71 [2018] PIERM 70 [2018] PIERM 69 [2018] PIERM 68 [2018] PIERM 67 [2018] PIERM 66 [2018] PIERM 65 [2018] PIERM 64 [2018] PIERM 63 [2018] PIERM 62 [2017] PIERM 61 [2017] PIERM 60 [2017] PIERM 59 [2017] PIERM 58 [2017] PIERM 57 [2017] PIERM 56 [2017] PIERM 55 [2017] PIERM 54 [2017] PIERM 53 [2017] PIERM 52 [2016] PIERM 51 [2016] PIERM 50 [2016] PIERM 49 [2016] PIERM 48 [2016] PIERM 47 [2016] PIERM 46 [2016] PIERM 45 [2016] PIERM 44 [2015] PIERM 43 [2015] PIERM 42 [2015] PIERM 41 [2015] PIERM 40 [2014] PIERM 39 [2014] PIERM 38 [2014] PIERM 37 [2014] PIERM 36 [2014] PIERM 35 [2014] PIERM 34 [2014] PIERM 33 [2013] PIERM 32 [2013] PIERM 31 [2013] PIERM 30 [2013] PIERM 29 [2013] PIERM 28 [2013] PIERM 27 [2012] PIERM 26 [2012] PIERM 25 [2012] PIERM 24 [2012] PIERM 23 [2012] PIERM 22 [2012] PIERM 21 [2011] PIERM 20 [2011] PIERM 19 [2011] PIERM 18 [2011] PIERM 17 [2011] PIERM 16 [2011] PIERM 14 [2010] PIERM 13 [2010] PIERM 12 [2010] PIERM 11 [2010] PIERM 10 [2009] PIERM 9 [2009] PIERM 8 [2009] PIERM 7 [2009] PIERM 6 [2009] PIERM 5 [2008] PIERM 4 [2008] PIERM 3 [2008] PIERM 2 [2008] PIERM 1 [2008]
2022-03-18
A Novel Miniaturized Capacitor Loaded Interdigital Filter
By
Progress In Electromagnetics Research M, Vol. 109, 39-49, 2022
Abstract
This paper proposes a novel miniaturized interdigital capacitor loaded interdigital filter, which is applied in C-band (3.2 GHz~4.2 GHz). By loading an interdigital capacitor on the open end of the resonator of the interdigital filter, the length of the resonator is shortened by 28%. The resonant frequency offset caused by tap introduction is adjusted by using the method of impedance compensation at the open end of resonator 1 and resonator 5, which further reduces the size of the filter. The miniaturized filter is fabricated on a 0.254 mm-thickness alumina substrate with relative dielectric constant of 9.8 by thin film process. Measured results are as follows: the passband of the filter is 3.2 GHz~4.2 GHz; the insertion at center frequency is -1 dB; the return loss is less than -18.3 dB. The size of the filter is 4.98 mm*6.45 mm (0.15λg*0.20λg), which is 37.8% smaller than that of the traditional interdigital filter.
Citation
Luyao Tang Xiaoli Jiang Hao Wei Weiwei Liu Wei Han , "A Novel Miniaturized Capacitor Loaded Interdigital Filter," Progress In Electromagnetics Research M, Vol. 109, 39-49, 2022.
doi:10.2528/PIERM22011204
http://www.jpier.org/PIERM/pier.php?paper=22011204
References

1. Aiswarya, S., S. Bhuvana Nair, L. Meenu, and S. K. Menon, "Analysis and design of stub loaded closed loop microstrip line filter for Wi-Fi applications," 2019 Sixteenth International Conference on Wireless and Optical Communication Networks (WOCN), 1-5, 2019.

2. Haddi, S. B., A. Zugari, A. Zakriti, and S. Achraou, "A compact microstrip T-shaped resonator band pass filter for 5G applications," 2020 International Conference on Intelligent Systems and Computer Vision (ISCV), 1-5, 2020.

3. Luo, L., H. Tie, Q. Ma, and B. Zhou, "Compact LTCC filter with 7th-order harmonics suppression for 5G N77 band applications," Progress In Electromagnetics Research Letters, Vol. 98, 69-74, 2021.

4. Wang, P., K. Duan, M. Li, M. Zhang, and B. Jin, "A novel miniaturized L-band filter with great stopband characteristics using interdigitated coupled lines CRLH-TL structure," Progress In Electromagnetics Research C, Vol. 114, 57-67, 2021.

5. Cheng, T., W. Yang, and Y. Ze, "Development of C-band embedded layout filter based on LTCC," Electronic Design Engineering, Vol. 28, No. 19, 107-112, 2020.

6. Peng, Y., et al., "Design of C-band double-layer MEMS filter," Journal of Microwave, No. S1, 223-226, 2016.

7. Zhang, M., M. Li, P. J. Zhang, K. Duan, B. Jin, L. Huang, and Y. Song, "A novel miniaturized bandpass filter basing on stepped-impedance resonator," Progress In Electromagnetics Research Letters, Vol. 97, 77-85, 2021.

8. Tang, L., X. Jiang, H. Wei, and W. Liu, "A novel miniaturized C-band bandpass filter," Progress In Electromagnetics Research M, Vol. 106, 167-177, 2021.

9. Bharathi, R. D., J. E. Yamini, A. Evangeline, and D. B. Narayanan, "Design and analysis of interdigital microstrip bandpass filter for center frequency 2.4 GHz," 2017 Third International Conference on Science Technology Engineering & Management (ICONSTEM), 930-933, 2017.

10. Li, H., "Design and realization of a microminiaturized filter based on broadside-coupled interdigital structure," 2012 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 1-3, IEEE, 2012.

11. Zhang, X., Q. Zhai, Z. Li, W. Ou, and Y. Ou, "Design of a K-band two-layer microstrip interdigital filter exploiting aggressive space mapping," Journal of Electromagnetic Waves and Applications, Vol. 32, No. 17, 2281-2291, 2018.

12. Min, T., et al., "Design of C-band interdigital filter and compact C-band hairpin bandpass film filter on thin lm substrate,", Springer International Publishing, 2017.

13. Wen, S. W., G. Yang, and X. X. Qian, "Initial design flow of tapped microstrip interdigital filter," High Power Laser and Particle Beams, Vol. 26, No. 9, 2262-2269, 2018.

14. Hong, J. S., Microstrip Filters for RF/Microwave Applications, John Wiley & Sons, USA, 2004.

15. Qiao, D. and Y. Dai, "Research on LTCC bandpass filter loaded with high performance capacitor," Electronic Components and Materials, Vol. 34, No. 12, 68-71, 2015.

16. Huang, X., et al., "A capacitive loaded broadband waveguide filter," Radar and Countermeasure, Vol. 41, No. 1, 62-64, 2021.

17. Fang, J., Z. Zhuang, and Y. Dai, "Miniaturized ultra-wideband high-pass filter based on LTCC," Research and Progress of Solid-state Electronics, Vol. 39, No. 4, 269-272+296, 2019.

18. Xu, H. and W. Sheng, "The X-band microstrip filter design," 2017 7th IEEE International Symposium on Microwave, Antenna, Propagation, and EMC Technologies (MAPE), 351-355, 2017.

19. Duan, K., P. Zhang, D. Cheng, Y. Song, L. Huang, and M. Li, "Design of new miniaturized broadband bandpass filter based on SIR," 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall), 1640-1644, Xiamen, China, Dec. 17-20, 2019.