A millimeter wave high amplitude and phase coherence single pulse and difference network

By employing a planar magic T and a hybrid electromagnetic bandgap structure for the design of a single-pulse sum and difference network, the problems of achieving high amplitude and phase consistency and easy processing and assembly in existing technologies are solved, enabling high-precision signal transmission and measurement over a wide bandwidth.

CN122136597APending Publication Date: 2026-06-02UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Filing Date
2026-04-10
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing single-pulse sum-difference networks cannot simultaneously meet the requirements of high amplitude and phase consistency, planar design, and easy manufacturing and assembly within a wide frequency band.

Method used

The design employs a symmetrical planar structure, including two primary planar magic Ts, two secondary planar magic Ts, two 90° twisted waveguides, and four 90° waveguide turning structures. A hybrid electromagnetic bandgap structure is set around the sum and difference network. The electromagnetic bandgap structure using staggered slots and metal pillars reduces the processing difficulty and achieves high amplitude and phase consistency.

Benefits of technology

It achieves high amplitude and phase consistency over a wide bandwidth, reduces the difficulty of processing and assembly, and improves signal transmission efficiency and measurement accuracy.

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Abstract

This invention discloses a millimeter-wave high-amplitude and phase-coherent single-pulse sum-difference network, belonging to the field of single-pulse radar. The sum-difference network is a symmetrical planar structure, including two first-order planar magic-Ts, two second-order planar magic-Ts, two 90° twisted waveguides, four 90° waveguide turning structures, and an electromagnetic bandgap structure disposed around the network. The first-order and second-order planar magic-Ts are identical planar magic-Ts, composed of an H-plane power divider and an E-plane waveguide. The electromagnetic bandgap structure includes an interleaved slot electromagnetic bandgap structure and a metal pillar electromagnetic bandgap structure. This invention employs an integrated planar structure, requiring only one-time processing and assembly, significantly reducing processing and assembly errors. Simultaneously, the planar magic-Ts are designed to effectively avoid the inherent dispersion defects of bridges and phase shifters, achieving high amplitude and phase coherence over a wide bandwidth. Furthermore, the use of a hybrid electromagnetic bandgap structure reduces the fabrication difficulty of the device while preventing electromagnetic leakage.
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