Design of Compact UWB Multilayered Microstrip Filter with Wide Stopband

Authors: N. Azadi-Tinat, H. Oraizi

Abstract:

Design of compact UWB multilayered microstrip filter with E-shape resonator is presented, which provides wide stopband up to 20 GHz and arbitrary impedance matching. The design procedure is developed based on the method of least squares and theory of N-coupled transmission lines. The dimensions of designed filter are about 11 mm × 11 mm and the three E-shape resonators are placed among four dielectric layers. The average insertion loss in the passband is less than 1 dB and in the stopband is about 30 dB up to 20 GHz. Its group delay in the UWB region is about 0.5 ns. The performance of the optimized filter design perfectly agrees with the microwave simulation softwares.

Keywords: Ultra-wideband, method of least square, multilayer microstrip filter, n-coupled transmission lines.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126439

References:

[1] Federal Communications Commission, Revision of Part 15 of the Commission’s Rules Regarding Ultra-Wideband Transmission Systems, First Report and Order, FCC 02. V48, April 2002.
[2] Z. Hao, J. Hong, "Ultra-Wideband Bandpass Filter Using Multilayer Liquid-Crystal-Polymer Technology", IEEE Trans. On Microwave theory and Theqniques, Vol. 56, No. 9, September 2008, pp:2095-2100
[3] Z. Hao, j. Hong, ,"Quasi-Elliptic UWB Bandpass Filter Using Multilayer Liquid Crystal Polymer Technology, "IEEE Microw. Wireless Compon. Lett., vol. 20, no. 4, April 2010, pp. 202-204
[4] Hunter, I., Theory and design of microwave filters, IEE Press, London, 2001
[5] Hong, J.S., and Lancaster, M.J.: ‘Microstrip filters for RF/microwave applications’, Wiley, New York, 2001, pp:129-133
[6] H. Oraizi and N. Azadi-Tinat, “Optimum design of novel UWB multilayer microstrip hairpin filters with harmonic suppression and impedance matching,” International Journal of Antennas and Propagation, vol. 2012, Article ID 762790, 7 pages, 2012
[7] Matlab R2008a, the language of technical computing, and Simulink, for simulation and Model-Based Design, www.mathworks.com
[8] Zeland EMsimulator Electromagnetic Moment method (Designer) structure simulation, Imitative electromagnetic three dimensional, IE3D v.12
[9] Ansoft HFSS v.14, High Frequency Electromagnetic Field Simulation Software, www.ansoft.com