Half-mode substrate integrated waveguide-based compact six-port circuit

Abstract

The invention discloses a half-mode substrate integrated waveguide-based compact six-port circuit. A 3dB directional coupler formed based on magnetic wall coupling of half-mode substrate integrated waveguides is utilized, so that the higher-anti-interference performance and structurally-compact six-port circuit can be realized. According to a traditional half-mode substrate integrated waveguide (HMSIW) electric wall aperture coupling-based coupler structure, equivalent magnetic walls are exposed externally, and the coupler structure will be easily interfered when high integration is carried out, aperture is relatively large in strong coupling, and the size of a circuit is very large. According to the half-mode substrate integrated waveguide-based compact six-port circuit of the invention adopted, coupling is realized between the magnetic walls of the half-mode substrate integrated waveguides, so that stronger anti-interference ability can be realized; according to a power distributor module, inductive metalized through holes are additionally formed at the joints of micro-strip tapered lines and substrate integrated waveguides (SIW), so that the bandwidth of the power divider can be further increased; phase converters are realized by using 1/8 wavelength half-mode substrate integrated waveguide (HMSIW) transmission lines; and the 3dB directional coupler, the power distributor module and the phase converters are connected together so as to form the compact six-port circuit of the invention.

Description

technical field [0001] The invention relates to a compact six-port circuit based on a half-mode substrate integrated waveguide, which belongs to the field of microwave technology. Background technique [0002] With the emergence and continuous development of integrated circuit technology, transmission lines such as microstrip lines, striplines, and slot lines are widely used in the field of microwave technology. They have the advantages of light weight, low cost and easy planar integration. However, it cannot meet the design requirements of high-power capacity circuits, and the high-frequency radiation is serious. The proposed substrate-integrated waveguide not only solves these problems, but also has the advantage of planar integration. The half-mode substrate-integrated waveguide is proposed on the basis of the substrate-integrated waveguide, which reduces the size of the circuit and arouses the interest of many researchers. In many microwave and millimeter-wave passive...

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Problems solved by technology

However, the half-mode substrate integrated waveguide is a semi-clos

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