Dielectric resonator, dielectric filter, communication equipment and method for preparing dielectric block

Abstract

The invention provides a dielectric resonator, a dielectric filter, communication equipment and a method for preparing a dielectric block. A hollowed-out groove is formed in an area adjacent to a first end face through a dielectric block, the dielectric block is equally divided into two parts in the direction perpendicular to the length direction, then the geometric center of the part where the first end face is located is located in the hollowed-out groove, and materials of the resonator at least comprise calcium carbonate, samarium trioxide, aluminum oxide and titanium dioxide. By implementing the invention, the ratio of the secondary resonant frequency to the fundamental mode resonant frequency of the dielectric resonator can be improved, so that after the dielectric resonator is applied to the dielectric filter, the out-of-band harmonic characteristic of the dielectric filter is improved, and the dielectric resonator is simple in structure, easy to form and suitable for mass production.

Description

technical field [0001] The present application relates to the technical field of communication, in particular to a dielectric resonator, a dielectric filter, a communication device and a method for preparing a dielectric block. Background technique [0002] With the rapid development of communication technology, the application of 5G communication technology is becoming more and more extensive. Filters are important components in 5G communication systems. Highly integrated, miniaturized, lightweight, and low-cost filters are an inevitable requirement of 5G communication technology. [0003] In the prior art, ceramic materials with high dielectric constant are generally used to prepare resonators with cuboid structure to form filters that meet the above requirements, but the resonant frequency of the resonator with this structure is closer to the fundamental mode resonant frequency , the ratio of the two is low, resulting in low far-end out-of-band characteristics of the filt...

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Problems solved by technology

[0004] This application mainly provides a dielectric resonator, a dielectric filter, a communication device, and a method for preparing a dielectric block, aiming to solve the problem of dielectric filtering caused by the closeness of the second resonance frequency of the dielectric resonator to the fundamental mode resonance frequency and the low ratio. The problem of low far-end out-of-band characteristics of the device

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