A Dielectric Filter with Hybrid Coupling Structure

A dielectric filter and hybrid coupling technology, applied in waveguide-type devices, circuits, electrical components, etc., can solve the problems of poor far-band performance, poor frequency high-end response of dielectric filters, etc., achieve low insertion loss, and solve the problem of dispersion. , Improve the effect of high-end response

CN108011162BActive Publication Date: 2020-11-17XIDIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-11-17

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Abstract

The invention, which belongs to the technical field of wireless communication, discloses a dielectric filter with a hybrid coupled structure. The dielectric filter is composed of a dielectric filter body and two signal input and output ports arranged at the two ends of the dielectric filter body, wherein the two signal input and output ports are 50-ohm coaxial interfaces. The dielectric filter body consists of a box body and a cover plate arranged above the box body; five metal cavities are arranged in the box body continuously, a resonator is arranged in each metal cavity, and the metal cavities are connected by coupling windows; and tuning bolts and coupling rods are arranged in the coupling windows. According to the invention, transmission in different modes can be controlled; the transmission of the main mode is the largest while the losses are not reduced; and the higher mode of the dielectric filter is suppressed effectively and the good far band performance is realized. Meanwhile, with introduction of mixed coupling, a problem of poor high-end frequency response of the dielectric filter due to the chromatic dispersion is solved.
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Description

technical field

[0001] The invention belongs to the technical field of wireless communication, and in particular relates to a dielectric filter with a hybrid coupling structure. Background technique

[0002] At present, dielectric filters are gradually used in systems such as wireless base stations and satellite communications due to their low loss and high selectivity. The dielectric filter uses a high-Q ceramic dielectric material dielectric resonator. Compared with the traditional metal coaxial cavity filter, it has high Q value, low insertion loss, small size, light weight, high rejection, and high intermodulation. , low temperature drift and other advantages. At the same time, the ceramic material is easy to process, has good mechanical properties, and is easy to produce and process dielectric filters. But for the existing dielectric filter, on the one hand, the dielectric resonator will not only generate the main mode of the required signal transmission during the re...

Examples

Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] The dielectric filter uses a high-Q ceramic dielectric material dielectric resonator. Compared with the traditional metal coaxial cavity filter, it has high Q value, low insertion loss, small size, light weight, high rejection, and high intermodulation. , low temperature drift and other advantages.

[0033] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, the dielectric filter of the hybrid coupling structure provided by the embodiment of the present invention includes: a coaxial tap 1, a dielectri...