Miniaturized broadband orthogonal type waveguide coaxial converter

Abstract

The invention relates to a miniaturized broadband orthogonal type waveguide coaxial converter. The waveguide coaxial converter comprises a standard rectangular waveguide, wherein one end of the standard rectangular waveguide is a short-circuit end and the other end of the standard rectangular waveguide is opened; a wide edge at one side of the standard rectangular waveguide is provided with a coaxial connector; an axial direction of the coaxial connector is orthogonal with a transmission direction of an electromagnetic field in the rectangular waveguide; an inner conductor of the coaxial connector stretches into the standard rectangular waveguide; a metal small circular table is connected with the end part of the coaxial connector; the metal small circular table and the inner conductor and the coaxial connector are concentric; and five quincuncially-distributed metal matching columns are arranged at the wide edge of the other side of the standard rectangular waveguide. The waveguide coaxial converter disclosed by the invention satisfies good performances of miniaturization, broadband and small standing waves; the machining manufacturability of the structure is good, and the experiment installation and debugging are convenient. For example, the length of the converter of an X frequency range full-waveguide bandwidth can be reduced to 15 mm from 50 mm in a regular step manner; and in a Ka frequency range, the length of the converter can be reduced to 6 mm from 20 mm.

Description

Technical field [0001] The invention belongs to the technical field of microwave devices, and specifically relates to a waveguide coaxial converter. Background technique [0002] Waveguide-to-coaxial converter is a kind of microwave device with a wide range of uses, and it is almost all used in microwave systems that use waveguides and coaxial lines as transmission lines at the same time. The common orthogonal waveguide coaxial converter uses the principle of electrical coupling to introduce the inner conductor of the coaxial line as a probe from the broad side of the waveguide into the waveguide vertically. When wide-band operation is required, the height of the narrow side of the waveguide is designed In a multi-level ladder type, when the ladder waveguide reaches 4 to 5 levels, the electrical performance of the full waveguide bandwidth standing wave ratio better than 20dB can be achieved. Such as Image 6 , Figure 7 As shown, Image 6 It is a schematic diagram of the existing ...

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Problems solved by technology

[0003] In order to solve the problems existing in existing waveguide coaxial converters such as large size, difficulty in manufacturing and inability to fine-tune in experiments, the present invention provides a miniaturized broadband orthogonal waveguide coaxial converter

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