A Microstrip Line Power Divider and RF Circuit Based on Nested U-shaped Defect Ground Structure
A defected structure and power divider technology, applied in circuits, waveguide devices, electrical components, etc., can solve the problem of increasing the circuit area, the power divider cannot achieve high power division ratio, and cannot meet the requirements of small microwave and millimeter wave integrated circuits. To improve integration, meet performance requirements, and achieve the effect of small size
Active Publication Date: 2022-07-12
XIDIAN UNIV
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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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[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0036] When designing a power divider, it is difficult for traditional microstrip lines to achieve high characteristic impedance. In 1999, Korean scholars J.I.Park and C.S.Kim et al. Structure (Defected Ground Structure, DGS), by etching the defect pattern on the ground plate of the transmission line, to change the distribution of the floor current of the microstrip line, so that the distributed capacitance and distributed inductance ...
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The invention discloses a microstrip line power divider based on a nested U-shaped defect ground structure, comprising from bottom to top: a ground metal layer provided with a group of nested U-shaped defect ground structures, a dielectric substrate and a pre-designed unequal The divided Wilkinson power divider; the unequally divided Wilkinson power divider includes a first microstrip transmission line connected in sequence, a parallel branch structure and an isolation resistor; one branch of the parallel branch structure includes a second microstrip transmission line connected in sequence, a third The microstrip transmission line and the fourth microstrip transmission line; the other branch comprises the fifth microstrip transmission line, the sixth microstrip transmission line and the seventh microstrip transmission line connected in sequence; one end of the isolation resistor is connected to the third microstrip transmission line and the fourth microstrip transmission line Between the microstrip transmission lines, the other end is connected between the sixth microstrip transmission line and the seventh microstrip transmission line; the nested U-shaped defect ground structure is arranged on the ground metal layer under the third microstrip transmission line. The present invention can realize high power division ratio and small volume.
Description
technical field [0001] The invention belongs to the field of microwave devices, and in particular relates to a microstrip line power divider and a radio frequency circuit based on a structure of nested U-shaped defects. 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 multiple outputs with equal or unequal energy. [0003] At present, as an indispensable microwave passive device in wireless communication systems, high 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 division Wilkinson power divider cannot achieve high power division ratio. The area of the entire circuit is increased, so it cannot meet the miniaturization requirements of microwave and millimeter-wave integrated circuits...
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IPC IPC(8): H01P5/18
CPCH01P5/184Y02D30/70
Inventor 张玉明王依璇吕红亮赵冉冉
Owner XIDIAN UNIV