Microstrip line power divider based on nested U-shaped defected ground structure and radio frequency circuit

Abstract

The invention discloses a micro-strip line power divider based on a nested U-shaped defected ground structure. The micro-strip line power divider comprises a grounding metal layer, a dielectric substrate and a pre-designed unequal Wilkinson power divider from bottom to top; the unequal Wilkinson power divider comprises a first microstrip transmission line, a parallel branch structure and an isolation resistor which are connected in sequence; one branch of the parallel branch structure comprises a second microstrip transmission line, a third microstrip transmission line and a fourth microstrip transmission line which are connected in sequence; the other branch comprises a fifth micro-strip transmission line, a sixth micro-strip transmission line and a seventh micro-strip transmission line which are connected in sequence; one end of the isolation resistor is connected between the third microstrip transmission line and the fourth microstrip transmission line, and the other end of the isolation resistor is connected between the sixth microstrip transmission line and the seventh microstrip transmission line; and the nested U-shaped defected ground structure is arranged on the grounding metal layer below the third microstrip transmission line. According to the invention, high power division ratio and small size can be realized.

Description

technical field [0001] The invention belongs to the field of microwave devices, and in particular relates to a microstrip line power splitter and a radio frequency circuit based on a nested U-shaped defect structure. Background technique [0002] A power divider, referred to as a power divider, is a device that divides the energy of one input signal into two or more outputs with equal or unequal energy. [0003] At present, as an indispensable microwave passive device in wireless communication systems, high power ratio power dividers are widely used in microwave radio frequency systems such as balanced power amplifiers, balanced mixers, and antenna arrays. Because the traditional microstrip line is difficult to achieve high impedance, the traditional unequal Wilkinson power splitter cannot achieve high power split ratio. At present, most of them use the method of cascading power splitters to realize high power split ratio power splitter, but this will undoubtedly The area o...

AI Technical Summary

Problems solved by technology

Because the traditional microstrip line is difficult to achieve high impedance, the traditional unequal Wilkinson power splitter cannot achieve high power split ratio. At present, most of them use the method of cascading power splitters to realize high power split ratio power splitter, but this will undoubtedly Increase the area of ​​the entire circuit, so it cannot meet the miniaturization requirements of microwave and millimeter wave integrated circuits

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