A high-performance miniaturized directional coupler chip

Abstract

The invention relates to the field of miniaturized directional coupler chips, in particular to a high-performance miniaturized directional coupler chip, which includes a distributed circuit and a lumped element circuit. The distributed circuit adopts a four-port microstrip directional coupler, and a four-port microstrip The directional coupler includes an input terminal, a straight-through terminal, a coupled terminal and an isolated terminal; the coupled terminal and the isolated terminal are respectively connected in series with a lumped element circuit. The coupler chip uses integrated circuit technology, has a very small volume and cost, and can be realized as a chip. The microstrip line structure is used at the output end and the straight-through end, which has very low insertion loss and high power passing capability; the lumped element circuit is connected in series at the coupled output end of the distributed microstrip directional coupler, so that the output signal at the coupled end is in super It has a high flatness in the broadband; a lumped element circuit is connected in series at the isolated output end of the distributed microstrip directional coupler, so that the signal output from the isolated end has a high degree of isolation in the ultra-wideband.

Description

technical field [0001] The invention belongs to the field of miniaturized directional coupler chips, in particular to a high-performance miniaturized directional coupler chip. Background technique [0002] As a microwave low-power passive device, the directional coupler has directivity and can distribute the power of microwave signals in a certain proportion. It is a basic microwave component that is widely used in radio frequency circuits and measurement systems. With the continuous development of microwave technology, equipment has more and more stringent requirements for low cost, miniaturization, high power, ultra-wideband and high integration. The traditional directional coupler can no longer meet the requirements, and there are many problems: the orientation of the waveguide structure Couplers are bulky, costly, and difficult to integrate; directional couplers based on PCB or ceramic substrate microstrip structures have narrow bandwidth and low isolation; directional c...

AI Technical Summary

Problems solved by technology

With the continuous development of microwave technology, equipment has more and more stringent requirements for low cost, miniaturization, high power, ultra-wideband and high integration. The traditional directional coupler can no longer meet the requirements, and there are many problems: the orientation of the waveguide structure Couplers are bulky, costly, and difficult to integrate; directional couplers based on PCB or ceramic substrate microstrip structures have narrow bandwidth and low isolation; directional couplers using lumped element structures have large losses, low power resistance, and low isolation

[0003] All the above-mentioned circuit solutions cannot meet the current demand for high-performance directional couplers, especially the miniaturization and chip-based technical solutions.

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