Abstract: An integrated circuit structure includes a substrate, a metal ring penetrating through the substrate, a dielectric region encircled by the metal ring, and a through-via penetrating through the dielectric region. The dielectric region is in contact with the through-via and the metal ring.

Abstract: A device includes a patch antenna, which includes a feeding line, and a ground panel over the feeding line. The ground panel has an aperture therein. A low-k dielectric module is over and aligned to the aperture. A patch is over the low-k dielectric module.

Abstract: A common mode noise suppression circuit applicable to differential signal transmission performs common mode noise suppression with respect to differential signals transmitted by a transmission line. An inductance-capacitance resonant structure is formed based on electromagnetic coupling combining a ground structure to suppress common mode noise of differential mode signals at broadband meanwhile keeping low loss of the differential mode signals at broadband via differential transmission lines. By this, the common mode noise suppression circuit performs broadband suppression with related to the common mode noise within a frequency scope of several GHz without affecting the differential mode signals and improves manufacturing process miniaturization to decrease cost.

Abstract: An exemplary embodiment of the present disclosure illustrates a signal transmission cell having a first through third conductors, a capacitor and an inductor. The first and third conductors form a first transmission circuit, and the second and the third conductors form a second transmission circuit. Signals which are respectively conveyed on the first transmission circuit and the second transmission circuit have the same magnitude, but have the opposite phases to each other, so as to form a pair of differential transmission lines. A first end of the inductor is electrically connected to the third conductor, and a second end of the inductor is electrically connected to a ground voltage. A first end of the capacitor is electrically connected to the first end of the inductor, and a second end of the capacitor is electrically connected to the second end the inductor.

Abstract: The present invention provides a device for suppressing common-mode radiation comprising: at least one resonator embedded into a plate, wherein the at least one resonator defines a plane having a normal direction parallel and perpendicular, respectively, to a longitudinal direction and a thickness direction of the plate. The embedment of the resonator into the plate enables a magnetic field, which is generated by a cable conductor when the device for suppressing common-mode radiation wraps the cable conductor therein, to perpendicularly pass through the plane so that the magnetic field and the resonator resonate together to generate a strong diamagnetism and thereby to suppress the common-mode radiation.

Abstract: A defected ground structure with shielding effect is provided. The structure includes a dielectric layer, a defected metal layer, a grounded metal layer and at least a conductive mushroom-like structure. The defected metal layer has a line-shaped opening and is disposed in the dielectric layer. The conductive mushroom-like structure is disposed between the defected metal layer and the grounded metal layer and is arranged along an extending direction of the line-shaped opening periodically. The conductive mushroom-like structure includes a laterally extending member and a vertically extending member. The laterally extending member is parallel to the defected metal layer and a distance is maintained away from the defected metal layer. The projection area of the laterally extending member on the defected metal layer covers a length of the line-shaped opening corresponding to the laterally extending member. The vertically extending member connects the laterally extending member and the grounded metal layer.

Abstract: An electromagnetic noise suppression circuit is provided. The suppression circuit comprises a first substrate, a first grounding plane and at least one transmission line. The transmission line is configured on a top surface of the first substrate and the first grounding plane is configured on the bottom surface of the first substrate. The first grounding plane comprises a first distributed coupling structure. The first distributed coupling structure and the transmission line can be equivalent to an inductor-capacitor resonant circuit. The electromagnetic noise within a designated frequency band can be suppressed by the distributed coupling structure of the electromagnetic noise suppression circuit to avoid interfering the signal transmitted by the transmission line and the electromagnetic radiation induced by the electromagnetic noise.

Abstract: Baluns with imaginary common-mode impedance are disclosed. A disclosed balun comprises an unbalanced port with an unbalanced terminal and a ground terminal, a balanced port with two balanced terminals opposite to each other in phase, and a transmission cell. The transmission cell has a differential transmission line, a virtually-ground patch, a ground conductor, and a conductive structure. The differential transmission line has a pair of conductive traces spaced apart from each other, and is electrically connected between the unbalanced port and the balanced port to transmit a differential signal. The virtually-ground patch is spaced apart from the differential transmission line. The conductive structure electrically connects the virtually-ground patch to the ground conductor.

Abstract: This invention provides a digital electronic device comprising: a grounded metal portion comprising a first metal plate electrically connected to ground and a first substrate disposed on the first metal plate; at least one layer of differential-mode reference metal portion comprising a second substrate and a second metal plate electrically connected to the first metal plate by at least one conductive structure; a pair of differential signal lines at least partially disposed on the second substrate of the at least one layer of differential-mode reference metal portion and electromagnetically coupled to the second metal plate of the at least one layer of differential-mode reference metal portion; and an equalizer electrically connected to the pair of differential signal lines.

Abstract: A filtering device is capable of suppressing common mode noises upon transmission of a differential signal, and includes a differential transmission line, a grounding layer, a dielectric unit and a conductive structure. The differential transmission line has a pair of conductive traces spaced apart from each other. The grounding layer is spaced apart from the differential transmission line. The dielectric unit is disposed between the differential transmission line and the grounding layer. The conductive structure is embedded in the dielectric unit, is coupled electrically to the conductive traces and the grounding layer, and cooperates with the differential transmission line, the grounding layer and the dielectric unit to form a stacked structure that has an effective negative permittivity, thereby suppressing the common mode noises coupled to the conductive traces. A differential signal transmission circuit is also disclosed.

Abstract: An electromagnetic noise suppression circuit is provided. The suppression circuit comprises a first substrate, a first grounding plane and at least one transmission line. The transmission line is configured on a top surface of the first substrate and the first grounding plane is configured on the bottom surface of the first substrate. The first grounding plane comprises a first distributed coupling structure. The first distributed coupling structure and the transmission line can be equivalent to an inductor-capacitor resonant circuit. The electromagnetic noise within a designated frequency band can be suppressed by the distributed coupling structure of the electromagnetic noise suppression circuit to avoid interfering the signal transmitted by the transmission line and the electromagnetic radiation induced by the electromagnetic noise.

Abstract: A defected ground structure with shielding effect is provided. The structure includes a dielectric layer, a defected metal layer, a grounded metal layer and at least a conductive mushroom-like structure. The defected metal layer has a line-shaped opening and is disposed in the dielectric layer. The conductive mushroom-like structure is disposed between the defected metal layer and the grounded metal layer and is arranged along an extending direction of the line-shaped opening periodically. The conductive mushroom-like structure includes a fungating part and a stipe part. The fungating part is parallel to the defected metal layer and a distance is maintained away from the defected metal layer. The projection area of the fungating part on the defected metal layer covers a length of the line-shaped opening corresponding to the fungating part. The stipe part connects the fungating part and the grounded metal layer.

Abstract: A common mode noise suppression circuit applicable to differential signal transmission performs common mode noise suppression with respect to differential signals transmitted by a transmission line. An inductance-capacitance resonant structure is formed based on electromagnetic coupling combining a ground structure to suppress common mode noise of differential mode signals at broadband meanwhile keeping low loss of the differential mode signals at broadband via differential transmission lines. By this, the common mode noise suppression circuit performs broadband suppression with related to the common mode noise within frequency scope of several GHzs without affecting the differential mode signals and improves manufacturing process miniaturization to decrease cost.

Abstract: A filtering device is capable of suppressing common mode noises upon transmission of a differential signal, and includes a differential transmission line, a grounding layer, a dielectric unit and a conductive structure. The differential transmission line has a pair of conductive traces spaced apart from each other. The grounding layer is spaced apart from the differential transmission line. The dielectric unit is disposed between the differential transmission line and the grounding layer. The conductive structure is embedded in the dielectric unit, is coupled electrically to the conductive traces and the grounding layer, and cooperates with the differential transmission line, the grounding layer and the dielectric unit to form a stacked structure that has an effective negative permittivity, thereby suppressing the common mode noises coupled to the conductive traces. A differential signal transmission circuit is also disclosed.