Dielectric filter with steep out-of-band rejection and antenna

A dielectric filter and out-of-band suppression technology, applied in the field of communication, can solve problems such as the insertion loss of dielectric filters

CN111668580APending Publication Date: 2020-09-15PIVOTONE COMM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-09-15

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Abstract

The embodiment of the invention discloses a dielectric filter with steep out-of-band rejection and an antenna, and belongs to the technical field of communication. The dielectric filter comprises a body, wherein the body is loaded with six resonant cavities which are connected in sequence; a blind hole is loaded on a cross coupling window between the second resonant cavity and the fifth resonant cavity in the six resonant cavities, the blind hole is used for realizing negative cross coupling, and the negative cross coupling forms two transmission zero points; and the first resonant cavity andthe sixth resonant cavity in the six resonant cavities realize positive cross coupling, and the positive cross coupling forms two transmission zero points. In the embodiment of the invention, the whole dielectric filter can form four transmission zero points, so that the out-of-band rejection is steeper. Because no negative cross coupling is loaded on the transmission main path of the dielectric filter, the overall insertion loss of the dielectric filter is low, and the out-of-band rejection degree is higher.
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Description

technical field

[0001] Embodiments of the present invention relate to the technical field of communications, and in particular to a dielectric filter and antenna with steep out-of-band rejection. Background technique

[0002] 5G (5 th Generation, the fifth generation mobile communication system) communication is the most cutting-edge communication technology at present, and various communication companies are competing to carry out related research. The Sub 6GHz segment in 5G communication adopts MIMO (Multi Input Multi Output) technology. Therefore, it is necessary to integrate a large number of filters inside the antenna, which poses a challenge to the insertion loss, out-of-band rejection, volume and weight of the filter. higher requirements. Traditional metal filters cannot be integrated inside the antenna due to their large size and weight, while dielectric filters can meet the needs of 5G systems. Therefore, dielectric filters are currently a hot research field. ...

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] Please refer to figure 1 , which shows a dielectric filter with steep out-of-band rejection provided by an embodiment of the present invention, and the dielectric filter includes a body 100 .

[0028] Wherein, the body 100 is made of a solid dielectric material with a high dielectric constant. Among them, ceramics have a higher dielectric constant, and the hardness and high temperature resistance of ceramics are also better, so the body 100 can be made of ceramic materials. Certainly, the solid dielectric material may also be other materials such as glass, which is not limited in this embodiment.

[0029] In this embodiment, six resonant cavities 110 connected in sequence are loaded on the body 100 . ...