Air strip line bridge

Abstract

The invention discloses an air strip line bridge which comprises a cavity and a cover board matched with the cavity, wherein, two sides of the cavity are provided with two ports respectively, and the cavity is internally provided with two metal conductors forming a coupling structure correspondingly; each metal conductor is divided into three sections, and each section has a quarter of wavelength; two side sections of each metal conductor are symmetrical relatively to a middle section and have the same size to form two weak coupling areas, and the middle sections of the two metal conductors are oppositely protruded to form a strong coupling area; and two ends of each metal conductor are connected with the two ports at corresponding sides respectively to form the air strip line bridge which takes air as an isolation medium. The operating frequency of the air strip line bridge is 700-2700MHz, and better energy combination and distribution are realized by combination of strong coupling and weak coupling; and by taking air as the medium, the air strip line bridge achieves good passive intermodulation index, high power capacity, wide frequency range, easy processing and easy mass production.

Description

technical field [0001] The invention relates to microwave broadband receiving technology, in particular to a broadband 3dB stripline bridge, specifically an air stripline bridge. Background technique [0002] With the development of modern wireless communication systems, passive devices are widely used for their advantages of environmental protection, pollution-free, low power consumption and high reliability. 3db bridges are very common devices in passive systems, often used for signal Combine, split and power combine. In microwave broadband reception, a stripline bridge is usually used as a coupling device. The stripline bridge has the advantages of low insertion loss and good directivity. At present, most commonly used stripline bridges use dielectric isolation. However, due to the high loss of the dielectric, the dielectric stripline bridge has defects such as low power capacity, difficult assembly and debugging, high cost and poor intermodulation index. Contents of ...

AI Technical Summary

Problems solved by technology

However, due to the high loss of the dielectric, the dielectric stripline bridge has defects such as low power capacity, difficulty in assembly and debugging, high cost and poor intermodulation index.

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