Filter unit, antenna filter unit and radio unit

By using a plastic substrate in base station equipment and forming a metal layer through electroplating, integrating EMC covers and key components, the problems of complex structure, heavy weight, and high cost in base station equipment are solved, achieving highly integrated and low-cost filter and antenna units.

CN116438712BActive Publication Date: 2026-07-10TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Filing Date
2020-09-29
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing base station equipment, filters and antenna units are complex in structure, heavy in weight, and costly, and are difficult to assemble. They also have poor EMC performance, especially in AAS products with high integration requirements, which pose a PIM risk.

Method used

Using plastic material as the base material, a metal layer is formed on the base material of the filter and antenna unit through electroplating technology, realizing the integration of EMC cover and key components, reducing independent parts and connectors, and forming a highly integrated filter and antenna unit.

Benefits of technology

This has enabled the reduction of the size and weight of filters and antenna units, reduced assembly costs, improved EMC and PIM performance, and simplified the production process.

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  • Figure CN116438712B_ABST
    Figure CN116438712B_ABST
Patent Text Reader

Abstract

The present disclosure relates to a filter unit comprising a cavity filter comprising a hollow main body, an inner side surface of the main body defining a closed cavity for accommodating a resonating element, the main body being formed by joining a filter base part and a filter cover part covering the filter base part, wherein an outer side surface of the filter base part or the filter cover part facing a radio board to be electrically coupled with the cavity filter is metallized such that a metal layer formed thereby is configured as an electromagnetic compatibility (EMC) cover for shielding the radio board from electromagnetic interference. The present disclosure further relates to an antenna filter unit comprising the above filter unit and a radio unit comprising the above filter unit or antenna filter unit.
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