Parallel coupled microstrip filters with ground-plane aperture for spurious band suppression and enhanced coupling
By Md.C. Velazquez-Ahumada, Jesús Martel, Francisco Medina. IEEE transactions on microwave theory and techniques, 2004
143 citations recorded by the source corpus.
Parallel coupled microstrip sections with a slotted ground plane are proposed as building blocks of coupled-line microstrip filters with enhanced performance. It is shown that, by proper adjustment of the ground-plane slot dimensions, the double frequency spurious band associated with unequal even/odd electrical lengths can be suppressed or meaningfully reduced. As an additional feature, this simple design relaxes tolerances of strip width and spacing in those cases where tightly coupled high-impedance sections are required. A rough preliminary design can be obtained within a few seconds using a fast optimization algorithm based on a quasi-TEM analysis of the coupled sections. Fine tuning is based on the use of a commercial electromagnetic simulator. Finally, experimental check of filter performance is provided.
Subfields: Aerospace Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/df246bd91c8f6329fc7d95f84e82e1015a73c00f
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In Aerospace Engineering
In Electrical and Electronic Engineering
Citations in the corpus
- An Overview on Defected Ground Structure (2008, methodology): “Similarly, there is another new ground plane aperture (GPA) technique which simply incorporates the microstrip line with a centered slot at the ground plane, and the use of GPA has attractive applications in 3 dB edge coupler for tight coupling and band pass filters for spurious band suppression and”