IC-shaped low-loss negative group delay circuit based on coupling microstrip line and implementation method thereof

Abstract

The invention discloses an IC-shaped low-loss negative group time delay circuit based on a coupling microstrip line and an implementation method thereof. The IC-shaped low-loss negative group time delay circuit is composed of a coupling microstrip line CL plated with copper and an open-circuit microstrip line TL plated with copper on an FR4 substrate. The open-circuit microstrip line TL comprisesan open-circuit microstrip line TL1 and an open-circuit microstrip line TL2; a structure formed by the coupling microstrip line CL and the open-circuit microstrip line TL1 is C-shaped; the coupling microstrip line CL and the open-circuit microstrip line TL2 are of an I shape; and the structure is in an IC shape and is symmetrical. The implementation method of the circuit comprises the steps of calculating an S parameter matrix and a circuit phase function of the whole circuit, solving a group delay function, and finally determining the size of each parameter of the circuit. According to the invention, the loss and reflection of the negative group time delay circuit are reduced, the group time delay bandwidth and time delay are improved, and the implementation method of the negative group time delay circuit with flexible design is provided.

Description

technical field [0001] The present invention relates to a negative group delay circuit and an implementation method, in particular to an IC-shaped low-loss negative group delay circuit based on a coupled microstrip line and an implementation method. Background technique [0002] With the increasing complexity of modern communication systems, the group delay (GD) characteristics of radio frequency circuits have attracted more and more attention. In order to avoid the signal distortion caused by the group delay variation, a group delay equalizer is often used to recover the signal distortion. In recent years, negative group delay (NGD) circuits are often used to compensate system delay. In addition, NGD circuits are also widely used in various communication systems, such as improving the efficiency of feedforward linear amplifiers, shortening delay lines, realizing miniaturization of amplifiers, and enhancing the bandwidth of analog feedback amplifiers. Solve the problem of ...

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Problems solved by technology

However, distributed negative group delay circuits often face high circuit losses

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