A cavity filter comprising: a resonance element including a coupling block; a first case and a second case housing the resonance element; a terminal unit penetrating the first case to be connected to an electrode pad of a PCB provided on the outside of the first case and the other end thereof is electrically connected to the coupling block of the resonance element; and an assembly unit provided on either one side or both sides of the case, and having a terminal insertion hole in which the terminal unit is insertedly provided, wherein the assembly unit is formed to protrude to the outside from a lower surface of the first case. the assembly unit provide a height between the first casing and PCB so the cavity filter avoid interference with the devices mounted on the PCB.

Filter devices that include a movable radio frequency (RF) transmission line are provided. A filter device that includes a movable RF transmission line also includes a plurality of resonators. The movable RF transmission line is configured to move between a first position and a second position relative to the resonators. Electromagnetic coupling between the movable RF transmission line and the resonators is reduced at the second position relative to the first position. Related methods of operating filter devices are also provided.

An object of the present invention is to prevent or reduce an error between a center frequency and a target center frequency in a coupled resonator band-pass filter which uses a post-wall waveguide. A band-pass filter (1) includes: a substrate (2) made of a dielectric substrate and sandwiched by a pair of conductor layers (3 and 4); and a post wall (11, 12) constituted by a plurality of conductor posts (11i, 12i) which pass through the substrate (2) and short-circuit the pair of conductor layers (3 and 4), the pair of conductor layers (3 and 4) and the post wall (11, 12) constituting a plurality of resonators (22 to 24) which are coupled, the pair of conductor layers serving as a pair of wide walls of the plurality of resonators, the post wall serving as a narrow wall of the plurality of resonator. The plurality of resonators include at least one resonator (22 to 24) which is provided with at least one recess (221 to 241) which passes through either one (the conductor layer 4) of the pair of wide walls and directly leads to inside the substrate (2).

Embodiments may relate to an assembly that includes a first package substrate with a first electromagnetic cavity. The assembly may further include a second package substrate with a second electromagnetic cavity that is adjacent to the first electromagnetic cavity. The first and second electromagnetic cavities may form a millimeter wave (mmWave) resonant cavity of a mmWave filter. Other embodiments may be described or claimed.

A ceramic waveguide filter comprises a plurality of resonant cavities defined by a plurality of through partition walls formed in a single ceramic block to divide sections of the ceramic block according to a pre-designated pattern, a plurality of resonant recesses formed in the sections of the plurality of resonant cavities divided by the through partition walls, a metal layer formed on an inner surface of each of the plurality of through partition walls, and input/output interfaces formed in two resonant cavities inputting and outputting signals among the plurality of resonant cavities.

Designing a filter with desired characteristics is made easy. A filter (1) includes a plurality of resonators (10 to 50) which are electromagnetically coupled. The plurality of resonators (10 to 50) each have a broad wall (11, 12, 21, 22, 31, 32, 41, 42, 51, 52) that is in a shape of a circle or a regular polygon with six or more vertices, and two resonators, which are coupled together, of the plurality of resonators (10 to 50) are arranged such that D<R.sub.1+R.sub.2 is satisfied, where R.sub.1 and R.sub.2 represent radii of circumcircles of the broad walls of the two resonators and D represents a center-to-center distance between the two resonators.

A cavity device is disclosed comprising a plurality of flat boards stacked one on lop of the other to form a multilayered structure. At least some of the flat boards comprise at least one opening or perforations having one or more layers of electrically conducting materials configured to establish electrical conduction with one or more layers of electrically conducting materials of another one of the flat boards, to thereby form electrically conducting patterns in the multilayered structure for interacting with electromagnetic radiation introduced into the cavity device.

The present invention relates to a cavity filter. The cavity filter includes: 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 the terminal portion is divided into a first side terminal contacted with the electrode pad and a second side terminal connected to the RF signal connecting portion, absorbs the assembly tolerance existing in a terminal insertion port, in which the terminal portion is provided, through an elastic member provided between the first side terminal and the second side terminal, and prevents disconnection of an electric flow, thereby preventing degradation in performance of an antenna device.

A semiconductor chip may include high frequency electrical circuitry. The semiconductor chip may include a cavity resonator integrated with the high frequency electrical circuitry in a semiconductor substrate of the semiconductor chip. The cavity resonator may include a resonator body in a cavity in the semiconductor substrate of the semiconductor chip. The resonator body may comprise a metal layer. The cavity resonator may include a feeding structure electrically connected to the high frequency electrical circuitry.

An object of the present invention is to prevent or reduce an error between a center frequency and a target center frequency in a coupled resonator band-pass filter which uses a post-wall waveguide. A band-pass filter (1) includes: a substrate (2) made of a dielectric substrate and sandwiched by a pair of conductor layers (3 and 4); and a post wall (11, 12) constituted by a plurality of conductor posts (11i, 12i) which pass through the substrate (2) and short-circuit the pair of conductor layers (3 and 4), the pair of conductor layers (3 and 4) and the post wall (11, 12) constituting a plurality of resonators (22 to 24) which are coupled, the pair of conductor layers serving as a pair of wide walls of the plurality of resonators, the post wall serving as a narrow wall of the plurality of resonator. The plurality of resonators include at least one resonator (22 to 24) which is provided with at least one recess (221 to 241) which passes through either one (the conductor layer 4) of the pair of wide walls and directly leads to inside the substrate (2).