The present disclosure discloses a band-stop filter and a radio frequency device, and the band-stop filter includes a cavity, an input port and an output port disposed on the cavity, and a transmission mainline and a plurality of resonators are disposed within the cavity, both ends of the transmission mainline are connected to the input port or the output port respectively, each resonator includes a resonant chamber and a resonant column disposed within the resonant chamber, a coupling wall is disposed between the resonant column and the corresponding transmission mainline, the coupling wall extends upwardly from the bottom wall of the cavity, the coupling wall and the transmission mainline are coupled.

The present disclosure discloses a band-stop filter and a radio frequency device, and the band-stop filter includes a cavity, an input port and an output port disposed on the cavity, and a transmission mainline and a plurality of resonators are disposed within the cavity, both ends of the transmission mainline are connected to the input port or the output port respectively, each resonator includes a resonant chamber and a resonant column disposed within the resonant chamber, a coupling wall is disposed between the resonant column and the corresponding transmission mainline, the coupling wall extends upwardly from the bottom wall of the cavity, the coupling wall and the transmission mainline are coupled.

The present disclosure relates to a waveguide section having at least one air-filled waveguide conducting tube having an electrically conducting inner wall. Each waveguide conducting tube comprises has a plug-in filter device with two or more electrically conducting elements arranged in series and spaced apart by a connecting arrangement. Each plug-in filter device is adapted to be retained in the corresponding waveguide conducting tube using a dielectric holding arrangement such that the electrically conducting elements are spaced apart from the waveguide conducting tube. The electrically conducting elements are arranged to be electromagnetically coupled such that passing a radio frequency is electromagnetically filtered.

The present disclosure relates to a waveguide section having at least one air-filled waveguide conducting tube having an electrically conducting inner wall. Each waveguide conducting tube comprises has a plug-in filter device with two or more electrically conducting elements arranged in series and spaced apart by a connecting arrangement. Each plug-in filter device is adapted to be retained in the corresponding waveguide conducting tube using a dielectric holding arrangement such that the electrically conducting elements are spaced apart from the waveguide conducting tube. The electrically conducting elements are arranged to be electromagnetically coupled such that passing a radio frequency is electromagnetically filtered.

The present invention relates to a cavity filter including: an RF signal connecting portion spaced apart, by a predetermined distance, from an outer member having an electrode pad provided on a surface thereof; and a terminal portion configured to electrically connect the electrode pad of the outer member and the RF signal connecting portion so as to absorb assembly tolerance existing at the predetermined distance and to prevent disconnection of the electric flow between the electrode pad and the RF signal connecting portion, wherein a part of the terminal portion, positioned between the electrode pad and the RF signal connecting portion, is elastically deformed to absorb assembly tolerance existing in a terminal insertion port. Therefore, the cavity filter can efficiently absorb assembly tolerance which occurs through assembly design, and prevent disconnection of an electric flow, thereby preventing degradation in performance of an antenna device.

The present invention relates to a cavity filter including: an RF signal connecting portion spaced apart, by a predetermined distance, from an outer member having an electrode pad provided on a surface thereof; and a terminal portion configured to electrically connect the electrode pad of the outer member and the RF signal connecting portion so as to absorb assembly tolerance existing at the predetermined distance and to prevent disconnection of the electric flow between the electrode pad and the RF signal connecting portion, wherein a part of the terminal portion, positioned between the electrode pad and the RF signal connecting portion, is elastically deformed to absorb assembly tolerance existing in a terminal insertion port. Therefore, the cavity filter can efficiently absorb assembly tolerance which occurs through assembly design, and prevent disconnection of an electric flow, thereby preventing degradation in performance of an antenna device.

Disclosed is a cavity filter including a housing, and a first sheet-shaped resonant rod, a second sheet-shaped resonant rod, and a third sheet-shaped resonant rod disposed in the housing. The first sheet-shaped resonant rod includes a first upright section and a first extension section extending from one side of the first upright section. The second sheet-shaped resonant rod includes a second upright section and a second extension section extending from one side of the second upright section. The second upright section, the first upright section, and the third sheet-shaped resonant rod are connected to the housing, and the first extension section and the second extension section extend toward each other. Capacitive coupling is formed between the first and second sheet-shaped resonant rods. Capacitive coupling or inductive coupling is formed between the second and third sheet-shaped resonant rods and between the first and third sheet-shaped resonant rods.

Disclosed is a cavity filter including a housing, and a first sheet-shaped resonant rod, a second sheet-shaped resonant rod, and a third sheet-shaped resonant rod disposed in the housing. The first sheet-shaped resonant rod includes a first upright section and a first extension section extending from one side of the first upright section. The second sheet-shaped resonant rod includes a second upright section and a second extension section extending from one side of the second upright section. The second upright section, the first upright section, and the third sheet-shaped resonant rod are connected to the housing, and the first extension section and the second extension section extend toward each other. Capacitive coupling is formed between the first and second sheet-shaped resonant rods. Capacitive coupling or inductive coupling is formed between the second and third sheet-shaped resonant rods and between the first and third sheet-shaped resonant rods.

A method of fabricating and tuning a surface integrated waveguide (SIW) filter incudes covering upper and lower surfaces of a dielectric substrate with a metallic layer. The method includes drilling a plurality of vias on the dielectric substrate and covering the vias with the metallic layer, wherein a first group of vias forms one or more cavity resonators, a second group of vias defines coupling channels between the cavity resonators, a third group of vias defines an effective width and a fourth group of vias defines an effective length of the cavity resonators. The method includes varying a center frequency by increasing diameters of the second group of vias to decrease the width of the coupling channels and varying a roll-off by increasing diameters of the third and fourth groups of vias to decrease the effective width and the effective length of the resonators.

A method of fabricating and tuning a surface integrated waveguide (SIW) filter incudes covering upper and lower surfaces of a dielectric substrate with a metallic layer. The method includes drilling a plurality of vias on the dielectric substrate and covering the vias with the metallic layer, wherein a first group of vias forms one or more cavity resonators, a second group of vias defines coupling channels between the cavity resonators, a third group of vias defines an effective width and a fourth group of vias defines an effective length of the cavity resonators. The method includes varying a center frequency by increasing diameters of the second group of vias to decrease the width of the coupling channels and varying a roll-off by increasing diameters of the third and fourth groups of vias to decrease the effective width and the effective length of the resonators.