Millimeter wave annular plane magic T

By introducing multi-section ring impedance cascade design and double-slit coupling barron structure into millimeter-wave plane magic T, the problems of narrow bandwidth, low isolation and poor amplitude consistency in the medium and high frequency scenarios of the prior art are solved, and the effects of broadband matching, high isolation and amplitude consistency are achieved.

CN119726045APending Publication Date: 2025-03-28DFINE TECH
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Patent Information

Application Number
CN202510020373.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing millimeter-wave plane magic T has narrow bandwidth, low isolation and poor amplitude consistency in high-frequency scenarios, making it difficult to meet the needs of high isolation and broadband matching.

Method used

The multi-section annular impedance cascade design and a double-slot coupled barron structure are adopted to achieve impedance matching and signal distribution through the annular impedance cascade segment, and signal isolation and amplitude consistency are improved through the double-slot coupled barron structure.

Benefits of technology

It significantly expands the working bandwidth of the millimeter wave ring plane magic T, improves signal isolation and amplitude consistency, reduces manufacturing costs, and improves the miniaturization and integration of devices.

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Abstract

The invention discloses a millimeter wave annular planar magic T, which comprises an upper layer metal floor, a middle printed circuit and a lower layer metal floor which are laminated to form a planar structure, the H-T branch is arranged in the middle printed circuit, is formed by cascading a plurality of sections of annular impedance conversion sections, and is sequentially connected with an H arm and port, a first T branch port and a second T branch port in the anticlockwise direction; the E-T branch comprises an upper slot and a lower slot which are arranged in the upper metal floor and the lower metal floor, and a gradually-changed coupling strip line which is arranged in the middle printed circuit, and the upper slot and the lower slot are connected with the multi-section annular impedance conversion section and the gradually-changed coupling strip line through vertical cross coupling; and one end of the gradient coupling strip line is connected with the E arm difference port. By introducing a multi-section annular impedance cascade design and a double-slit coupling balun structure, the working bandwidth of the planar magic T is remarkably expanded, the isolation degree and amplitude phase consistency of signals are improved, the manufacturing cost is reduced, and the miniaturization and integration degree of the device are improved.
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