An eight-way fully symmetrical distributed on-chip transformer

Abstract

The invention discloses an eight-way fully symmetrical distributed on-chip transformer, which mainly solves the problem in the prior art that the ports of the on-chip transformer are unbalanced, so that when it is used for impedance transformation, the impedance of each port will have a large difference. The problem of large power loss will be caused when the power is combined and distributed. This eight-way fully symmetrical distributed on-chip transformer includes a primary coil symmetrical along the x-axis and y-axis and provided with eight signal ports, and a secondary coil symmetrical along the x-axis and y-axis and provided with two signal ports. Inductances of equal size are connected between the two signal ports connected to the primary coil, and a pair of suspended metal strips are arranged on the secondary coil at a position symmetrical to the center of the two signal ports. Through the above solution, the present invention achieves the mutual balance of each port, and is suitable for operations such as power synthesis, power distribution, and impedance transformation, and has high practical value and popularization value.

Description

technical field [0001] The invention relates to a transformer, in particular to an eight-way fully symmetrical distributed on-chip transformer. Background technique [0002] As we all know, since the on-chip transformer can realize impedance transformation, power combination and power distribution, and has many advantages such as small insertion loss, small area, and multi-channel power combination and distribution, it plays an important role in the fields of radio frequency, microwave and millimeter wave integrated circuits, etc. important role. [0003] Existing on-chip transformers mostly use such as figure 1 The structure shown, that is, the shape of the secondary coil is consistent with that of the primary coil. Although the on-chip transformer of this traditional structure can realize impedance transformation, power combination and power distribution, the asymmetry of the structure of the on-chip transformer itself leads to a very serious unbalance of each port of th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an eight-way fully symmetrical distributed on-chip transformer, which mainly solves the problem in the prior art that due to the unbalance of each port of the on-chip transformer, when it is used for impedance transformation, the impedance of each port will have a large difference. When it is used for power combination and distribution, it will cause a large power loss

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