Double-mode circular substrate integrated wave-guide cavity wave filter

Abstract

This invention discloses a double-mode round chip integrated waveguide cavity filter used in microwave and millimeter wave circuit applying a round chip integrated waveguide cavity working under double mode including: the lower surface of a medium chip covers a lower surface metal layer totally and an upper metal layer is set on the top surface of the chip, the double-mode cavities are two cavities surrounded by side walls formed by the upper surface metal layer, the lower surface metal layer and multiple metal through holes and a first coupled slot and a second coupled slot are set on the surrounding of the cavities, the second coupled slot between two adjacent round cavities is connected by the second waveguide section and the first waveguide section is connected to the first coupled slot.

Description

technical field [0001] The invention is a dual-mode circular substrate integrated waveguide cavity filter applied to the design of microwave and millimeter wave circuits, the design of microwave and millimeter wave integrated circuits, and the design of microwave and millimeter wave passive components, which belongs to the integrated waveguide cavity filter Technical field of design. Background technique [0002] The filter is one of the important basic unit circuits of the circuit system, and its performance has an important impact on the overall selectivity, noise figure, gain, and sensitivity of the system. Commonly used in microwave and millimeter wave circuits are filters based on metal waveguides and filters based on planar circuits such as microstrip lines and coplanar lines. Filters based on metal waveguides usually have the advantages of high Q, low loss, and good selectivity, but they require extremely high processing precision, high cost, large volume, and are di...

AI Technical Summary

Problems solved by technology

Filters based on metal waveguides usually have the advantages of high Q, low loss, and good selectivity, but they require extremely high processing accuracy, high cost, large volume, and are difficult to integrate with active circuits.

Although filters based on planar circuit technologies such as microstrip lines and coplanar lines are easy to integrate with active circuits, they usually have large radiation, large losses, low Q values, and poor performance.

Radiation is also easy to cause space coupling and damage the stability of the circuit

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