Filter containing filling medium

Abstract

The invention discloses a filter containing a filling medium. According to a technical scheme of the invention, the filter containing the filling medium comprises a cavity and a cover plate, wherein an input joint and an output joint are arranged outside the cavity; an input copper sheet and an output copper sheet are arranged in the cavity, a tuning screw is further arranged in the cavity, a filling medium is further arranged in the cavity, the filling medium is an insulator with the dielectric constant larger than that of air, the space between the cavity and the cover plate is filled with the filling medium, and the filling medium is plastic or ceramic or glass. According to the filter disclosed in the scheme provided by the invention, the problem that the frequency reaches the requiredfrequency band range under the conditions of small boundary dimension and height in the design of a filter, a duplexer and a combiner is solved. The problems that the insertion loss index does not meet the requirements and the cost of the flange plate type resonance column is relatively high due to the use of the flange plate type resonance column are prevented.

Description

technical field [0001] The invention relates to the field of filters, in particular to a filter containing a filling medium. Background technique [0002] In the design of conventional filters, duplexers, and multiplexers, the required frequency range cannot be reached due to the product requirements such as small size and shallow depth. This is because the larger the size and the deeper the depth, the higher the frequency Low, otherwise it is relatively high, resulting in design indicators that cannot meet the requirements. In the prior art, there is a solution of using a flanged resonant column to reduce the frequency, but the disadvantage of this solution is that the insertion loss index does not meet the requirements and the cost of the flanged resonant column is relatively high. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the main purpose of the present invention is to provide a filter with a filling medium that can reduce the freq...

AI Technical Summary

Problems solved by technology

[0002] In the design of conventional filters, duplexers, and multiplexers, the required frequency range cannot be reached due to the product requirements such as small size and shallow depth. This is because the larger the size and the deeper the depth, the higher the frequency low, otherwise it is relatively high, resulting in design indicators that cannot meet the requirements

In the prior art, there is a solution of using a flanged resonant column to reduce the frequency, but the disadvantage of this solution is that the insertion loss index does not meet the requirements and the cost of the flanged resonant column is relatively high

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