A self-isolated substrate integrated waveguide balanced filter power divider

Abstract

The invention discloses a self-isolating substrate integrated waveguide balanced filter power splitter, which includes a metal ground, a dielectric substrate, and a top metal layer, and a full-mode substrate integrated waveguide is formed through a metallized via hole connecting the metal layer and the metal ground A resonator composed of a square cavity and a resonator composed of two half-mode substrate-integrated waveguide rectangular cavities, one wide side of the full-mode substrate-integrated waveguide square cavity passes through the narrow sides of the two half-mode substrate-integrated waveguide rectangular cavities Sensitive window is connected. It also includes six feeder lines on the top layer, one pair of feeder lines is connected to the full-mode substrate integrated waveguide square cavity; the other two pairs of feeder lines are respectively connected to a half-mode substrate integrated waveguide rectangular cavity. The invention adopts a single-layer substrate integrated waveguide structure, and combines a common full-mode substrate integrated waveguide cavity with two half-mode substrate integrated waveguide cavities to form a substrate with the characteristics of small size, self-isolation and simple structure. Chip integrated waveguide balanced filter splitter.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a substrate-integrated waveguide balanced filter power divider. Background technique [0002] With the rapid development of miniaturization, multi-function and high integration of wireless communication systems, the requirements for the overall communication quality of the system are getting higher and higher. Balanced circuits have been widely used because of their functions of anti-electromagnetic interference and suppression of environmental noise. Filters and power splitters are essential components in a communication system. Combining the two together will help reduce the number of components, improve system integration, and improve the overall performance of the system. Combining substrate integrated waveguide with balanced circuit and filter power divider to form substrate integrated waveguide balanced filter power divider can not only obtain the advantages of balanc...

AI Technical Summary

Problems solved by technology

However, due to the low Q value and high loss of the microstrip structure, the balanced filter power divider using the above design method cannot be used in high-frequency communication systems, and the realization of the isolation function requires additional isolation circuits such as resistors

A small number of balanced filter power splitters are implemented based on substrate integrated waveguides, such as the design method of slot-fed multilayer substrate integrated waveguide cavities, but the circuit size is too large, the structure is more complicated, and there is no isolation between output ports

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