In order to fulfill the need of miniaturized electronic filter that can be a part of automotive radar system is proposed in this paper. The suggested filter has two quarter wavelength long parallel coupled line sections with an attachment of Complimentary Split Ring Resonators (CSRRs) and stepped impedance open circuit stub which are connected in shunt at the center. This arrangement of components provides sharp selectivity for the range of 22 GHz to 29 GHz. Proposed filter is a combination of two already designed UWB filters with precised parameters. Therefore it is bound to have low insertion loss and better out of band performance.

1. "FCC First report and order in the matter of revision of part 15 of the commission's rules regarding ultra-wideband transmission systems," ET-Docket 98-153, April 22, 2002.
2. Hussein Shaman, Ahmed Al. Amoudi, Sultan Almorqi, "Millimeter-Wave Ultra-Wideband (UWB) Bandpass Filter (BPF) Using Microstrip Parallel Coupled Lines", IEEE Wireless Conference and Networking Conference, 2016.
3. Ahmed Hameed Reja, Syed naseem ahmed, Asaad A. M. Al-salih, "New Ulta Wideband Filters based on Tuning fork shape and CSRRs", IEEE international conference on Aerospace electronics and remote sensing technology, 2014.
4. Y. Yang, X. Zhu and Q. Xue, "On-chip circuit miniaturization techniques for millimeter wave bandpass filter design," IEEE global symposium on millimeter waves, pp. 24-27, Aug 2017.
5. F. Falcone, T. Lopetegi, J. D. Baena, R. Marques, F. Martin, and M. Sorolla, "Effective negative stop-band microstrip lines based on complementary split-ring resonators," IEEE Microw. Wirel. Compon. Lett. , 14(6), pp. 280–282, 2004.
6. Joan García-García, Jordi Bonache, and Ferran Martín, "Application of electromagnetic bandgaps to the design of ultra-wide bandpass filters with good out-of-band performance," IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 12, pp. 4136-4140, December 2006.
7. Marta Gil, Jordi Bonache, and Ferran Martin, "Metamaterial filters with attenuation poles in the pass band for ultra wide band applications," Microwave and Optical Technology Letters, vol. 49, no. 12, pp. 29092913, December 2007.
8. Y. Zhang," A novel microstrip slow-wave resonator band-pass filter for millimeter wave applications", Microwave and optical technology letters, vol. 50, pp. 1720-1722, July, 2011.
9. R. Gomex-Garcia, and J. Alonso, "Systematic Method for the Exact Synthesis of Ultra-Wideband Filtering Responses Using High-Pass and Low-Pass Sections", IEEE Trans. on Microw. Theory and Tech. , Vol. 54, No 10, October 2006, pp. 3751-3764.
10. Fu-Chnag Chen and QING-Xin CHU," Design of compact tri-band filters with improved band allocation," IEEE transaction on Microwave Theory and Technique, Vol. 57, no. 7, pp. 1790-1797, July 2009

Uwb Bandpass Filter Microstrip Csrrs