K band SIW transmission line and design method thereof

A transmission line, K-band technology, used in waveguides, waveguide-type devices, circuits, etc., can solve the problem of low accuracy, and achieve the effect of high power capacity and small size

Active Publication Date: 2015-03-04
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

However, this formula

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[0024] As a more specific implementation example, the present invention will be described by taking several main parameters in the design as examples.

[0025] The invention uses three-dimensional electromagnetic simulation software HFSS (High Frequency Structure Simulator) for design.

[0026] Step 1. According to the empirical formula of the circular hole SIW structure, the parameters of the K-band 30mm SIW transmission line are obtained: the diameter of the metal through hole d, the hole spacing s between two adjacent metal through holes in the same row, and the difference between the two rows of metal holes Between width w. The parameters of the dielectric substrate are: the relative permittivity is 3, and the loss tangent is 0.0013. The substrate thickness is 1mm. The initial test d and s choose 0.6mm and 1.2mm. The value of w is 6.49mm.

[0027] Step 2. Use d as the side length of the square hole, and use s and w for the hole spacing and width. Take this as the initial value

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Abstract

The invention relates to microwave, transmission line technologies. Provided is a K band SIW transmission line and design method thereof. Two rows of square through holes are punched in a medium substrate, two parallel sides of a square through hole are parallel with the propagation direction, side length of the square hole is 0.4 mm & lt; d <= 0.8 mm; the line spacing of two rows of metal through holes is w & lt; 8 mm, s is the distance between two adjacent metal through holes of the same row is 0.4 & lt; d/s < 0.8, the equivalent formula of the SIW propagation constant and the medium waveguide broadside is weff = w - d. A novel SIW transmission line is achieved by changing the shape of the through hole; the novel SIW transmission line meets the actual needs of transmission performance, is low in volume and high in power capacity, the available bandwidth thereof reaches the full band; and the novel SIW transmission line has a precise equivalent formula with the medium waveguide. A new structure option is provided for designing a variety of microwave devices with planar circuits.

Description

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Claims

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Application Information

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Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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