Title :
A novel miniature suspended stripline filter
Author :
Menzel, Wolfgang
Author_Institution :
Microwave Tech., Ulm Univ., Germany
Abstract :
Concept, design, and results of a novel miniature suspended stripline (SSL) filter type based on an interdigital filter structure with quasi-lumped elements are presented. The filter is realized in a metal channel of 4.25 mm×5 mm. Compared to a standard SSL resonator, length is reduced by about 75%. A three resonator filter at 7 GHz with a 450 MHz bandwidth is demonstrated, having a filter length of only 12 mm and losses of about 1.4 dB, including 18 mm of excess transmission line and the transitions to coaxial line. Further examples are a three-resonator filter at 11 GHz and a 8 GHz five-resonator filter.
Keywords :
coaxial cables; digital filters; equivalent circuits; resonator filters; transmission lines; 1.4 dB; 11 GHz; 12 mm; 450 MHz; 7 GHz; 8 GHz; filter length; interdigital filter structure; metal channel; quasilumped elements; resonator filter; suspended stripline filter; transmission line; Capacitance; Coupling circuits; Distributed parameter circuits; Equivalent circuits; Frequency; Inductance; Microwave filters; Resonator filters; Stripline; Strips;
Conference_Titel :
Microwave Conference, 2003. 33rd European
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMC.2003.177662
