US 12,206,148 B2 · Filter device and equivalent filter circuit thereof

Abstract

The invention discloses a filter device. The filter device comprises a substrate, at least one transmission conductor, and a reference conductor having a slotted structure. The substrate is provided at a first surface thereof with the transmission conductor, and provided at a second surface thereof with the reference conductor. The slotted structure comprises a frame portion, a slotted portion, and a hollow portion. The slotted portion surrounds the frame portion, and the hollow portion is formed in the frame portion. At least one impedance unit is configured on the frame portion. The equivalent filter circuit of the filter device is formed between the transmission conductor, the slotted structure, the reference conductor, and the impedance unit. Thereby, the equivalent filter circuit absorbs at least one noise at at least one specific frequency by the impedance unit to avoid the noise reflected to affect the transmission quality of signal.

Claims30

Dependent claims

An equivalent filter circuit, comprising:

at least one first equivalent transmission line model, comprising:
a first master transmission conductor, connected at a left end thereof to a signal input port, and connected at a right end thereof to a signal output port;
and
a first slave transmission conductor;
at least one second equivalent transmission line model, comprising:
a second master transmission conductor connected at a left end and a right end thereof to a reference potential;
and
a second slave transmission conductor connected at a right end thereof to a right end of the first slave transmission conductor;
and
at least one first impedance unit connected between a left end of the first slave transmission conductor and a left end of the second slave transmission conductor in series.

7 more elements

Dependencies are inferred from the claim text.

Filter device and equivalent filter circuit thereof

Life of this patent

Filter device and equivalent filter circuit thereof

Life of this patent

Abstract

Claims30