Broadband probe coaxial coupler

Abstract

The invention discloses a broadband probe coaxial coupler. The broadband probe coaxial coupler comprises a main connector and a coupling connector, wherein the main connector comprises an inner main connector conductor, an outer main connector conductor and a main connector insulator; the coupling connector comprises an inner coupling connector conductor, an outer coupling connector conductor and a coupling connector insulator; the outer main connector conductor comprises a cylindrical cylinder body, at least one radial through hole is formed in the cylinder body, the coupling connector is detachably and fixedly mounted at the radial through hole, and the inner coupling connector conductor is coaxially arranged with the radial through hole; and at least one low-impedance section is arranged among the inner coupling connector conductor, the outer coupling connector conductor and the outer main connector conductor. The broadband probe coaxial coupler has the beneficial effect that the structure is simple, the loading capacity is large, and the intermodulation effect is low; and furthermore, the increase of the coupling degree along the frequency is effectively reduced, a coupling degree curve can meet the coupling flatness requirement in a relatively wide frequency band range such as 1.7GHz-3.6GHz, and the precision of microwave signal detection is greatly improved.

Description

technical field [0001] The invention relates to a probe coaxial coupler used in the technical fields of microwave transmission such as communication and radar, in particular to a broadband probe coaxial coupler with a wide frequency band. Background technique [0002] The probe coaxial coupler is similar to a non-isolated power divider. It is mainly used for coupling or synthesizing power of microwave signals in a specific ratio. It is one of the commonly used components in the field of microwave technology and mostly appears in a coaxial structure. Generally, a component for coupling output is added to the main transmission line, so as to allocate a specific power from the main transmission line and output it from another port. The relationship between input power and coupled output power is the degree of coupling. The probe coaxial coupler is characterized by simple structure, high carrying power and low intermodulation. [0003] The existing broadband probe coaxial coupl...

AI Technical Summary

Problems solved by technology

The coaxial coupler with this structure has the advantages of small coupling fluctuation, low intermodulation, and small standing wave ratio, but it also has the following disadvantages in the process of use: its coupling degree increases greatly with the increase of frequency, resulting in the coupling degree curve in The coupling flatness requirements of the coupler cannot be met within a wider frequency band, thus greatly reducing the microwave signal detection accuracy of the coupler

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