Title :
A modified parallel-coupled filter structure that improves the upper stopband rejection and response symmetry
Author :
Chang, Chi-Yang ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
fDate :
2/1/1991 12:00:00 AM
Abstract :
A modified parallel-coupled microstrip line filter structure is presented. Using this new structure improves the filter upper stopband rejection by at least 15 dB, and the filter response symmetry is also improved. Compared with the traditional parallel-coupled filter, the modified filter used less space and is easy to lay out owing to its inline structure. Several examples show the performance improvement of the filters fabricated in both low-dielectric-constant (2.55) and high-dielectric-constant (10.2) substrates
Keywords :
microwave filters; passive filters; strip line components; high-dielectric-constant; inline structure; low-dielectric-constant; microstrip line filter; parallel-coupled filter structure; response symmetry; substrates; upper stopband rejection; Band pass filters; Delay; Equations; Equivalent circuits; Frequency response; Helium; Microstrip filters; Military computing; Passband; Performance analysis;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
