Back to results
US 6,608,538 B2Granted
Small size cross-coupled trisection filter
AssigneeIndustrial Technology Research Institute
InventorChin-Li Wang
Life of this patent
Estimating the term…
Abstract
The present invention relates to a three-order filtering structure. Each resonator includes an inductive portion and a capacitive portion. The inductive portion of the second resonator is folded that the inductive portion of the first resonator is coupled to the inductive portion of the third resonator forming a trisection filtering structure. The cross-couple between resonator 1 and 3 adds additional finite transmission zero below the passband.
Claims13
A cross-coupled trisection filtering structure, comprising:
- first resonance unit, having a first inductance device and a second inductance device connected to a first grounding capacitance device;
- a second resonance unit, having a third inductance device, which produces the main coupling with the second inductance device, and a fourth inductance device connected to a second grounding capacitance device;
- and
- a third resonance unit, having a fifth inductance device, which produces the main coupling with the fourth inductance device, and a sixth inductance device connected to a third grounding capacitance device, wherein the first and sixth inductance devices are cross-coupled.
1 more element
A cross-coupled trisection filtering structure, comprising:
- at least one capacitance layer, formed of capacitor electrodes provided for an upper surface of a second dielectric layer, to shield electrodes provided for an upper surface of a first and gird dielectric layers;
- an inductance layer, to fold an electrode of one inductor such that all inductors formed on the inductance layer are coupled to each other and shield electrodes formed on the inductance layer are provided for an upper surface of a fifth and eighth dielectric layers;
- and
- at least one second capacitance layer, formed of capacitor electrodes provided for an upper surface of a ninth dielectric layer, to shield electrodes provided for an upper surface of the eighth dielectric layer and a bottom surface of the ninth dielectric layer, wherein the-inductors formed on the inductance layer are connected to the first and second capacitance layers through via-hole to form a three-order filter.
1 more element
Dependencies are inferred from the claim text.