Small frequency divider for 5G frequency band

By using a multilayer circuit structure within the LTCC ceramic body and a low-temperature co-fired ceramic process, the mutual coupling problem of traditional frequency dividers in a compact space is solved, realizing a high-performance, small-sized frequency divider with high Q value, low insertion loss, and high isolation.

CN121367041APending Publication Date: 2026-01-20JIANGSU FREETEL COMM CO LTD +1
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Patent Information

Application Number
CN202511879188.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-12
Publication Date
2026-01-20

AI Technical Summary

Technical Problem

Traditional frequency dividers are prone to mutual coupling between lumped components in a compact space, which leads to a decrease in the Q value of the filter circuit, an increase in insertion loss, and a reduction in the isolation between low-frequency and high-frequency channels.

Method used

Employing a multi-layer circuit structure within an LTCC ceramic body, and by rationally selecting the equivalent component values ​​of the filter and optimizing its vertical spatial coupling relationship, inductor and capacitor components are integrated to form low-frequency and high-frequency channel filters. The external electrodes are encapsulated using a planar grid array LGA, and the circuit layers are integrated into the ceramic body using a low-temperature co-fired ceramic process.

Benefits of technology

It achieves dual-channel functionality in a high-performance frequency divider with an extremely small size, minimizes mutual coupling between lumped components, reduces the impact of parasitic parameters, and provides a frequency divider with high Q value, low insertion loss, and high isolation.

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Abstract

The invention discloses a small frequency divider for a 5G frequency band, and belongs to the technical field of frequency dividers of radio frequency front-end circuits, and the small frequency divider comprises an LTCC ceramic body, a circuit layer in the LTCC ceramic body, and an outer electrode at the bottom of the LTCC ceramic body. The external electrode comprises a common port, a low-frequency channel output port, a high-frequency channel output port, a first grounding port, a second grounding port, a third grounding port, a fourth grounding port, a fifth grounding port and a sixth grounding port, and the external electrode is connected with the circuit layer through a via hole. The problems that the Q value of a filter circuit is reduced, the insertion loss is increased and the isolation degree between a low-frequency channel and a high-frequency channel is reduced due to the fact that a traditional frequency divider easily causes mutual coupling between lumped components and unnecessary parasitic parameters are generated are solved.
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