Double-C structure SIW transmission line

Abstract

The invention relates to the technologies of microwave and transmission lines, and specifically relates to a double-C structure SIW transmission line. The transmission line has the high-Q, low-loss and low-leakage characteristics. According to the invention, all rows of metal cylinders of a conventional SIW transmission line are replaced by the upper and lower rows of sheet arc metal pieces whichare staggered, wherein all sheet arc metal pieces are the same, and the internal diameters of the arcs are D. The shortest distance D of the adjacent sheet arc metal pieces in a single row is d, the shortest distance between two ends of the arcs is f and the shortest distance between the staggered sheet arc metal pieces in the upper and lower rows is w, wherein 0<d<D, d<f, and 0<w<=d. According tothe invention, a double-C structure is employed for replacing a metal cylinder in a conventional SIW, and the technical problems that the OFF state of a traveling wave is not ideal, the Q value of aline cavity is reduced and the outward radiation of the electromagnetic waves is increased, which are caused by the leaking of the electromagnetic waves caused by two rows of metal cylinders of the conventional SIW structure, in the transmission process are solved under the condition that a no-TM mode is guaranteed.

Description

technical field [0001] The invention relates to microwave and transmission line technology, in particular to a double-C structure SIW transmission line, which has the characteristics of high Q, low loss and low leakage. Background technique [0002] Since the advent of Maxwell's equations, in just over a hundred years, the application technology of electromagnetism in engineering has developed by leaps and bounds. From metal waveguides to planar integrated microstrip lines, the microwave technology industry has experienced one milestone after another. The bulky metal waveguide no longer meets the requirements of microwave integration in today's society. The microstrip circuit is small in size, low in cost, and easy to integrate. However, the open structure of the microstrip circuit itself limits its quality factor and power capacity. [0003] Substrate integrated waveguide (SIW) is a new type of waveguide structure proposed in recent years. It is to set two rows of metal cy...

AI Technical Summary

Problems solved by technology

[0006] The present invention replaces the metal cylinders in the traditional SIW by adopting a double-C structure (interlaced sheet-shaped arc metal sheets), so as to overcome the leakage of electromagnetic waves caused by the two rows of metal cylinders in the traditional SIW structure during the transmission process, resulting in the failure of traveling waves. The state is not ideal, the technical problem of reducing the Q value of the cavity and increasing the outward radiation of electromagnetic waves

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