A waveguide to coaxial converter

Abstract

The invention discloses a waveguide coaxial converter, which belongs to the technical field of waveguide coaxial conversion equipment. It comprises: a waveguide body, the upper side is the broad side of the upper waveguide, the lower side is the broad side of the lower waveguide, the left and right sides are the narrow side of the left waveguide and the narrow side of the right waveguide, the front side is the end face of the waveguide, and the back side is open to form the waveguide port, A waveguide cavity is formed in the waveguide body; an impedance matching block is located in the waveguide cavity and a gap is formed between its front end face and the inner side wall of the waveguide end face. The impedance matching block is connected to the broad side of the lower waveguide, and the impedance matching block, the end face of the waveguide and the lower The broad side of the waveguide is integrally connected or formed by integral processing; the coaxial joint is installed on the end face of the waveguide, the coaxial joint includes a coaxial inner conductor, and the end face of the waveguide is provided with a through hole, and one end of the coaxial inner conductor passes through the through hole and is connected with the impedance. The matching block is connected, and the coaxial inner conductor is provided with a matching convex part which forms a gap 2 with the inner side wall of the end face of the waveguide. The waveguide-to-coaxial converter of the present invention can overcome assembly errors and improve standing wave performance.

Description

technical field [0001] The invention relates to the technical field of waveguide-coaxial conversion equipment, in particular to a waveguide-coaxial converter. Background technique [0002] Waveguide to coaxial converters are widely used in radar, communication equipment and other equipment to realize low-loss transition of microwave signals from waveguide system to coaxial system or from coaxial system to waveguide system. At present, the existing waveguide-to-coaxial converter structures such as figure 1 As shown, a matching block 7 is installed in the waveguide cavity in the waveguide 6, and then connected to the matching block 7 through pins 9. Usually, the matching block 7 is formed by processing first, and then the matching block 7 is fixed in the waveguide cavity through screws 8. , In order to ensure the standing wave performance of the waveguide coaxial converter and avoid short circuit, the gap formed between the matching block 7 and the inner wall of the front sid...

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Problems solved by technology

In addition, the matching block 7 is processed independently. Although the processing accuracy of the matching block 7 can be ensured, when the matching block 7 is assembled in the waveguide cavity, there are assembly errors and it is difficult to avoid assembly errors, so that the standing wave index of the waveguide coaxial converter Generally, the difference in the horizontal direction of the C-band is 0.1mm, and the standing wave influence is about 0.05-0.15, and the higher the frequency, the more obvious it is. Moreover, it is difficult to achieve a good Standing wave index, and debugging requires more time and effort

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