Broadband filter adopting one-cavity triple-mode cavity resonator

Abstract

The invention discloses a broadband filter adopting a one-cavity triple-mode cavity resonator. The broadband filter comprises a cavity, a first port, a second port and a perturbation metal body, wherein the perturbation metal body is arranged at the bottom of the cavity, the center of the perturbation metal body deviates from the center of the cavity, and the first port and the second port are arranged on the cavity and penetrate through the outer wall and the inner wall of the cavity. A first conductor assembly is arranged at the first port, a second conductor assembly is arranged at the second port, the axis of the first conductor assembly and the axis of the second conductor assembly are perpendicular to each other and perpendicular to the longitudinal center line of the cavity respectively. A degenerate mode is separated by the method of skewing of the resonator, and therefore, the broadband filter has the advantages of high selectiveness and Q value and simple design, has a wider fractional bandwidth, can meet requirements of miniaturization communication, is easy to manufacture without machining any chamfers or performing slotting, solves the problem of complexity of band wide and narrow machining of the existing cavity filter, and is simple in structure and wide in application range.

Description

technical field [0001] The invention relates to a filter, in particular to a broadband filter using a single-cavity three-mode cavity resonator, and belongs to the field of wireless communication. Background technique [0002] Microwave filter is an indispensable device in the transmitting and receiving ends of modern communication systems. It separates signals, allowing useful signals to pass through without attenuation as much as possible, and suppressing useless signals from passing through with as much attenuation as possible. With the development of wireless communication technology, the frequency band between signals becomes narrower and narrower, which puts forward higher requirements on the specification and reliability of filters. The cavity filter has the advantages of high Q value, large power capacity, easy implementation and stable performance, so it has high application value. The cavity filter achieves inductive or capacitive coupling by opening holes or addi...

AI Technical Summary

Problems solved by technology

[0007] 4) In January 2004, L.H.Chua et al. published an article titled "Analysis of dielectric loaded cubic cavity for triplemode filter design", proposing to use the coaxial cable as the feed, such as Figure 6a As shown, the dielectric cavity filter structure using tuning screws, the simulation results are as follows Figure 6b As shown; the adjustable range of this structure using coupling screws is relatively small, and there are certain deficiencies

Images