Three-frequency microstrip antenna and communication terminal

By designing the rectangular ring and L-shaped branch structure of the triple-band microstrip antenna, the mutual coupling and interference problems between antenna units are solved, and miniaturized design and stable multi-band coverage are achieved. It is suitable for wireless products in the fields of Internet of Things and wireless communications.

CN223471759UActive Publication Date: 2025-10-24SHENZHEN ACAD OF METROLOGY & QUALITY INSPECTION
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Patent Information

Application Number
CN202422710867.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-07
Publication Date
2025-10-24
Estimated Expiration
2034-11-07

AI Technical Summary

Technical Problem

Existing microstrip antennas have problems of mutual coupling and interference between antenna units when covering multiple frequency bands, and their large size affects communication stability and electromagnetic compatibility.

Method used

A triple-band microstrip antenna is designed. It adopts a combined structure of a rectangular ring, first and second radiating branches, and a feed line. By rationally arranging and adjusting the size and position of the L-shaped branches, the impedance matching is optimized, the mutual coupling effect is reduced, and a miniaturized design is achieved.

Benefits of technology

It effectively reduces the mutual coupling effect between radiation structures in different frequency bands, realizes the miniaturization design of the antenna, and has good radiation performance and stability in the 2.4GHz, 3.5GHz and 5.5GHz frequency bands, suitable for a variety of wireless products.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of microstrip antennas, in particular to a three-frequency microstrip antenna and a communication terminal, which comprise a substrate and a radiation patch arranged on the substrate, the radiation patch comprises a rectangular ring with an opening part, two first radiation branches and two second radiation branches; wherein the rectangular ring, the two first radiation branches and the two second radiation branches are symmetrically distributed along the center line of the substrate, and the bottoms of the first radiation branches are flush with the bottom edge of the substrate; according to the antenna structure provided by the utility model, in the process of realizing the three-frequency radiation performance, the mutual coupling effect between the radiation structures of different frequency bands is effectively reduced through corresponding technical means, so that the change of the working frequency of the antenna can be realized by flexibly adjusting the size of the radiation structure, and the three-frequency antenna of other frequency bands is formed and is not limited to the three frequency bands of 2.4 GHz, 3.5 GHz and 5.5 GHz.
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