Miniaturized Bandpass Filter with Wide Stopband using Spiral Configuration of Stepped Impedance Resonator
-
Vivek Singh
Abstract
In this letter, a miniaturized Band Pass Filter (BPF) with wide stopband centered at 0.350 GHz for TETRA band applications is proposed using a Spiral Short Circuit quarter wavelength Stepped Impedance Resonator (SSC-SIR) and a stub loaded on feed line for enhancement of rejection level in the stopband. Spiral configuration of the resonator is used for the miniaturization of BPF. The proposed BPF provides a 3dB fractional bandwidth of 13.7 % with two transmission zeros in the lower and upper stopband to provide good selectivity and four transmission zeros which provide wide stopband upto 6.86f0. Proposed BPF has a very compact size of 0.064λg×0.062λg.
References
[1] N. Kumar and Y. K. Singh, “Compact stub-loaded open-loop BPF with enhanced stopband by introducing extra transmission zeros,” Electron. Lett., vol. 51, pp. 22–23, 2015.10.1049/el.2014.3523Search in Google Scholar
[2] W. Nie, S. Luo, Y. Guo, and Y. Fan, “Compact bandpass filter with improved upper stopband,” Electron. Lett., vol. 50, pp. 2–3, 2014.10.1049/el.2014.1164Search in Google Scholar
[3] S. Zhang, S. Member, L. Zhu, and R. Li, “Compact quadruplet bandpass filter based on alternative J/K inverters and λ/4 resonators,” IEEE Microw. Wireless Compon. Lett., vol. 22, pp. 224–226, 2012.10.1109/LMWC.2012.2193124Search in Google Scholar
[4] L. Gao, X. Y. Zhang, and Q. Xue, “Miniaturised bandpass filter using novel feeding structure for harmonic suppression,” Electron. Lett., vol. 28, pp. 6–7, 2012.10.1049/el.2012.1389Search in Google Scholar
[5] Z. He, Z. Shao, and C. J. You, “Parallel feed bandpass filter with high selectivity and wide stopband,” Electron. Lett., vol. 52, pp. 844–846, 2016.10.1049/el.2015.3345Search in Google Scholar
[6] L. Gao and X. Y. Zhang, “Novel miniaturized bandpass filter with wide stopband using spiral resonator,” in 2013 IEEE MTT-S Int. Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO), Singapore, 2013, pp. 1–3.10.1109/IMWS-BIO.2013.6756210Search in Google Scholar
[7] V. K. Killamsetty and B. Mukherjee, “Compact Wideband Bandpass Filter for TETRA Band Applications,” IEEE Microwave Wireless Components Letters, vol. 27, no. 7, pp. 630–632, July 2017.10.1109/LMWC.2017.2711515Search in Google Scholar
[8] M. Sagawa, M. Makimoto, and S. Yamashita, “Geometrical structures and fundamental characteristics of microwave of stepped impedance resonators,” IEEE Trans. Microwave Theory Tech., vol. 45, pp. 1078–1085, 1997.10.1109/22.598444Search in Google Scholar
[9] Q.-X. Chu and H. Wang, “A compact open-loop filter with mixed electric and magnetic coupling,” IEEE Trans. Microwave Theory Tech., vol. 56, pp. 431–439, 2008.10.1109/TMTT.2007.914642Search in Google Scholar
[10] S. Amari, ““Direct synthesis of folded symmetric resonator filters with source–Load coupling,” IEEE Microw. Wireless Compon. Lett., vol. 11, pp. 264–266, 2011.10.1109/7260.928933Search in Google Scholar
[11] J.-S. Hong and M. J. Lancaster. Microstrip Filters for RF/Microwave Applications. New York: Wiley, 2001.10.1002/0471221619Search in Google Scholar
© 2018 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Research Articles
- A Differential UWB Quasi-Yagi Antenna with A Reconfigurable Notched Band
- Design of Hybrid Antenna System for User Terminal Applications
- High Isolation Compact Four-Port MIMO Antenna Loaded with CSRR for Multiband Applications
- Compact 4-Port MIMO/Diversity Antenna with Low Correlation for UWB Application
- Decoupling of Dual-band Closely Spaced MIMO Antennas Based on Novel Coupled Resonator Structure
- Hexagonal Fractal Antenna using Koch for Wireless Applications
- Short Communication
- Miniaturized Bandpass Filter with Wide Stopband using Spiral Configuration of Stepped Impedance Resonator
- Research Articles
- Studying Photonics Crystal Cavities by Design and Simulation of a 1 to 8 Optical Demultiplexer
- Application of Photonic Crystal Ring Resonators for Realizing All Optical Demultiplexers
- Second Order Solutions of THz Response of Gated Two-Dimensional Electron Gas in Magnetic Field
Articles in the same Issue
- Frontmatter
- Research Articles
- A Differential UWB Quasi-Yagi Antenna with A Reconfigurable Notched Band
- Design of Hybrid Antenna System for User Terminal Applications
- High Isolation Compact Four-Port MIMO Antenna Loaded with CSRR for Multiband Applications
- Compact 4-Port MIMO/Diversity Antenna with Low Correlation for UWB Application
- Decoupling of Dual-band Closely Spaced MIMO Antennas Based on Novel Coupled Resonator Structure
- Hexagonal Fractal Antenna using Koch for Wireless Applications
- Short Communication
- Miniaturized Bandpass Filter with Wide Stopband using Spiral Configuration of Stepped Impedance Resonator
- Research Articles
- Studying Photonics Crystal Cavities by Design and Simulation of a 1 to 8 Optical Demultiplexer
- Application of Photonic Crystal Ring Resonators for Realizing All Optical Demultiplexers
- Second Order Solutions of THz Response of Gated Two-Dimensional Electron Gas in Magnetic Field
