Waveguide antenna, radar device and method for manufacturing a waveguide antenna

CN122139273APending Publication Date: 2026-06-02ROBERT BOSCH GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ROBERT BOSCH GMBH
Filing Date
2024-09-09
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing waveguide antennas in radar equipment suffer from crosstalk and resonance problems between high-frequency channels, and have strict positioning tolerance requirements, which affect electrical characteristics and stability.

Method used

Design a multi-channel waveguide antenna, using a shared common air slot section and a surrounding air slot in the side wall structure. The notch forms a stub to reduce resonance, and notches are set between adjacent channels to suppress crosstalk. The cross-section of the waveguide channel can be rectangular or circular, and the depth of the air slot is one-quarter of the electromagnetic wave wavelength.

Benefits of technology

A compact multi-channel waveguide antenna was achieved, which reduced return loss and insertion loss, improved electrical characteristic stability and positioning tolerance, and reduced crosstalk and resonance.

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Abstract

A waveguide antenna has a plurality of waveguide channels. Each waveguide channel is formed by a lateral wall structure and is arranged to couple out electromagnetic waves from an open output region of the waveguide channel. For each waveguide channel, a circumferential air slot is configured in an outer region of the lateral wall structure. Air slots of adjacent waveguide channels share a common air slot section.
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Citation Information

Patent Citations

  • high-frequency element arrangement with waveguide

    DE102009009317A1