Synthesis and Design of Narrow-Band Micrwave Lossy Filter Based on Microstrip Technology
Lossy synthesis techniques allow filters consisting resonators with finite Quality factor (Q) to be synthesized and designed while preserving prescribed in-band flatness. It is achieved at the expense of an overall constant additional insertion loss. As microstrip resonators generally suffer from low quality factor, using lossy synthesis techniques can be a good approach to design high performance narrow-band microstrip filters. In this paper, a lossy 3rd order Chebyshev filter with 5% fractional bandwidth, based on microstrip technology is synthesized and designed.