Wideband substrate integrated ridge waveguide and analyzing method thereof

Abstract

The invention discloses a broadband substrate integrated ridge waveguide and an analysis method thereof. The broadband substrate integrated ridge waveguide comprises a medium substrate; two rows of metal columns are arranged on the medium substrate to form a substrate integrated waveguide; a row of middle ridge metal columns are arranged between the two rows of metal columns and vertically embedded into the medium substrate; the upper surfaces of the middle ridge metal columns are superimposed with the upper surface of the medium substrate; and the lower surfaces of the middle ridge metal columns are arranged in the medium substrate and form a gap g with the lower bottom surface of the medium substrate. The invention reduces the cut-off frequency of a principal mode and improves the bandwidth of the waveguide. The simple theoretical analysis method realizes higher accuracy. A row of metal strips with the identical spacing are added into the lower ends of the suspended metal columns soas to introduce novel capacitance, thereby improving the bandwidth. The invention has the significant advantages of small volume, light weight, low loss and easy integration with other planar microwave millimeter-wave circuits. The working bandwidth of the principal mode is greatly improved, thereby greatly broadening the scope of application.

Description

technical field [0001] The invention belongs to a novel transmission line in a microwave and millimeter wave hybrid integrated circuit and a millimeter wave integrated circuit, in particular to a broadband substrate integrated ridge waveguide and an analysis method thereof. Background technique [0002] The traditional rectangular waveguide is a waveguide device for transmitting electromagnetic energy, which can reduce transmission loss and prevent electromagnetic waves from radiating outward, so that the guided electromagnetic wave is completely confined to the metal conduit, with large power capacity, high Q value, and easy processing. However, the rectangular waveguide is bulky, and its three-dimensional structure is difficult to integrate with planar circuits. The development of modern technology has very high requirements for miniaturization and integration. As the most widely used planar transmission line, the microstrip line is small in size and light in weight, and ...

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Problems solved by technology

[0004] However, the current substrate-integrated waveguide has a narrow bandwidth in practical applications, especially in broadband microwave and millimeter-wave systems, and cannot meet the requirements of engineering applications, so its use is limited to a certain extent.

So far, no one has studied the bandwidth extension technology of substrate-integrated waveguides

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