Waveguide-microstrip linear transformation and power divider based on slot coupling

Abstract

The invention discloses a wave guide and microstrip line convertor and power divider of a vertical structure based on slit coupling. The power divider comprises the following parts which are successively arranged from bottom to up: a waveguide tube, a first metal earth plate with an opening having the same shape as the waveguide tube, a first dielectric slab, a second metal earth plate with an opening having the same shape as the waveguide tube, a third metal earth plate and a second dielectric slab. A surface facing to the waveguide tube of the first dielectric slab is attached with a frequency regulating unit; two microstrip lines are arranged above the second dielectric slab in parallel, and two rectangular slits used for electromagnetic energy coupling are etched on the third metal earth plate; the peripheries of the first dielectric slab, the first metal earth plate and the second metal earth plate are provided with metal through holes which are evenly distributed along a side line of the waveguide tube mouth. The power divider has simple structure and little volume and can be conveniently integrated in the structures needing wave guide for feeding, such as a microstrip circuit system; in addition, the invention adopts a vertical structure, which allows the design to be more flexible and more convenient.

Description

technical field [0001] The invention relates to the field of waveguide-microstrip line transition structures in passive devices, in particular to a waveguide-microstrip line conversion and power divider based on slot coupling technology. Background technique [0002] In today's society, radar sensor devices are widely used in civilian and military fields, such as anti-theft systems, anti-collision systems in the transportation field, and missile radar systems in the military. [0003] The front-end modulation module of a radar sensor usually consists of an antenna located on the sensor head on the surface of the device and a microwave circuit located inside the device. In order to realize the low cost and miniaturization of the radar sensor, the microstrip antenna is an ideal choice for the antenna at the open end of the sensor. The commonly used microstrip array antenna is used, and the microwave circuit part is usually composed of microstrip lines. microwave circuit. [...

AI Technical Summary

Problems solved by technology

Although these structures have good electrical performance, most of them have changed the internal structure of the waveguide, which is more complicated in process implementation and leads to higher cost.

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