4 results about "Null point" patented technology

The utility model relates to a resonator, and more specifically relates to a structure for realizing a negative zero point of an in-line cavity, and the structure comprises a housing; the shell is provided with a cavity with an opening, and the cover plate is arranged at the end, provided with the opening, of the shell in a covering mode so as to seal the cavity; the three resonators are uniformly distributed and arranged in the cavity at intervals, each resonator is of a cylinder structure with a cavity, and the cavities of the resonators face the cover plate; and the coupling connection sheet is fixed in the cavity and is matched with the cover plate, and the plurality of resonators are spaced at a preset distance. The device can be installed on the cover plate by effectively utilizing the structural configuration of the device, and has the advantages of convenience in adjustment and high practicability.

The negative coupling groove for the dielectric filter is connected with two adjacent dielectric resonators of the dielectric filter and is a step-shaped blind groove formed by communicating a shallow blind groove and a deep blind groove, the center line of the shallow blind groove is perpendicular to the center line of the deep blind groove, and the shallow blind groove is provided with an opening in the upper surface, the front surface and / or the rear surface of a dielectric filter body. The groove depth of the shallow blind groove in the vertical direction is smaller than the hole depth of the debugging hole, the deep blind groove is only provided with an opening in the upper surface of the dielectric filter body, and the groove depth of the deep blind groove in the vertical direction is larger than the hole depth of the debugging hole in the dielectric resonator and smaller than two times of the hole depth of the debugging hole. Capacitive coupling between the two dielectric resonators can be achieved, the negative coupling strength can be changed by adjusting the length, width and depth of the deep blind groove and / or the shallow blind groove, the strength of a low-frequency end transmission zero point can be changed, shape and precision changes in the high-temperature sintering process can be reduced, the electrical performance is more stable, and the service life of the dielectric resonators is prolonged. And the volume ratio of the negative coupling groove is reduced, and the structural strength is improved.

This application relates to the field of filtering device technology, and provides a filter comprising three resonant cavities, three resonators, and a coupling plate arranged side-by-side. The three resonant cavities are, in sequence, a first resonant cavity, a second resonant cavity, and a third resonant cavity. The three resonators are correspondingly disposed within the three resonant cavities. The coupling plate includes a first piece spanning the three resonant cavities and located on one side of each resonator. A second piece and a third piece, bent and grounded, are respectively provided at both ends of the first piece. The first piece also has a clearance section, which is further away from the resonators than the first piece and is arranged parallel to the inner wall of the filter. This filter avoids the resonant frequency of the coupling plate itself affecting the passband of the filter by cross-coupling the first piece with the second and third pieces, enabling the three resonant cavities arranged side-by-side to achieve the beneficial effect of a single zero point.

The invention relates to a filter and communication equipment. The filter comprises at least two resonators, wherein the at least two resonators comprise a first resonator and a second resonator; the first flying rod is arranged between the first resonator and the second resonator, and the first flying rod is used for forming an out-of-band transmission zero point; and the port tap is connected with the first fly rod, and the port tap and the first fly rod are of an integrated structure. The first fly rod and the port tap are arranged to be of an integrated structure, installation operation is convenient, the installation efficiency is obviously higher than the installation efficiency when the tap line and the first fly rod are installed separately in the related technology, and the product performance can be guaranteed on the premise that the product performance is guaranteed, and particularly the inhibition index requirement is met. The machining and assembling problems caused by a miniature first fly rod structure are effectively solved, rapid, stable and high-yield mass production is achieved, and meanwhile optimal control over the production cost is considered.