CN-122026040-A - Self-packaging type reflection-free differential filtering power divider with substrate integrated suspension strip line and broadband common-mode absorption characteristic

CN122026040ACN 122026040 ACN122026040 ACN 122026040ACN-122026040-A

Abstract

The invention discloses a self-packaged type reflection-free differential filtering power divider with a substrate integrated suspension strip line and broadband common-mode absorption characteristic, and relates to the technical field of radio frequency. The power divider comprises a first packaging layer, a first air cavity layer, a circuit layer, a second air cavity layer and a second packaging layer. The first packaging layer comprises a first substrate, metal layers are arranged on two end faces of the first substrate along the first direction, the second packaging layer comprises a fifth substrate, and metal layers are arranged on two ends of the fifth substrate along the first direction. The first packaging layer, the first air cavity layer, the circuit layer, the second air cavity layer and the second packaging layer are sequentially stacked along the first direction. According to the invention, the first packaging layer and the second packaging layer are arranged, so that a self-packaging structure can be formed, the leakage of external electromagnetic interference and internal signals can be restrained, a complete and stable grounding layer can be provided, the common mode rejection ratio can be improved, the electromagnetic isolation between the first packaging layer and other modules can be realized, the crosstalk can be reduced, and the anti-interference capability can be remarkably improved.

Inventors

CHEN DU
MIAO XIAO
JIANG XU
WEI FENG
Zheng Hanpi

Assignees

西安电子科技大学

Dates

Publication Date: 20260512
Application Date: 20260311

Claims (10)

1. A self-packaged reflectionless differential filtering power divider with substrate integrated suspended strip lines and broadband common mode absorption characteristics, comprising: The first packaging layer comprises a first substrate, and metal layers are arranged on two end faces of the first substrate along the first direction; The first air cavity layer comprises a second substrate, the two end faces of the second substrate along the first direction are both provided with metal layers, and the first air cavity layer forms a penetrating air cavity structure along the first direction; the circuit layer comprises a third substrate, and microstrip modules formed by microstrip lines are arranged on two end faces of the third substrate along the first direction, and the microstrip modules are used for carrying out filter response and power distribution on input signals; The second air cavity layer comprises a fourth substrate, metal layers are arranged at two ends of the fourth substrate along the first direction, and the second air cavity layer forms a penetrating air cavity structure along the first direction; The second packaging layer comprises a fifth substrate, and metal layers are arranged at two ends of the fifth substrate along the first direction; The first substrate, the second substrate, the third substrate, the fourth substrate and the fifth substrate are all made of insulating materials, and the first packaging layer, the first air cavity layer, the circuit layer, the second air cavity layer and the second packaging layer are sequentially stacked along the first direction.
2. The power divider of claim 1, wherein the third substrate comprises a first surface, the first surface being one of the end surfaces of the third substrate in the first direction; the microstrip module comprises a first microstrip unit which is arranged on the first surface; The first microstrip unit comprises a first input component and a first input terminal, a first resonance component, a first power distribution component and a first output terminal, wherein the first input terminal is connected with the input end of the first input component, the first output terminal is connected with the output end of the first power distribution component, and the first resonance component is connected between the first input component and the first power distribution component.
3. The power divider of claim 2, wherein the first surface has a first centerline and a second centerline, the first centerline extending in the second direction and the second centerline extending in the third direction, the first direction, the second direction, and the third direction being perpendicular to each other; The first input component is of a U-shaped structure formed by microstrip lines and comprises a bottom edge and two side edges; The bottom edge of the U-shaped structure of the first input assembly and the side edge of the U-shaped structure of the first input assembly extend along a straight line and are identical in width, and the heights of the side edges of the U-shaped structure of the first input assembly are identical.
4. A power divider according to claim 3, characterized in that the opening of the U-shaped structure of the first input assembly is directed in the second direction towards the outside of the first surface; the first input terminal includes a wide input terminal and a narrow input terminal, each of which is formed of a microstrip line; the wide input terminal is connected to one side of the U-shaped structure of the first input assembly, which is close to one end of the opening of the U-shaped structure of the first input assembly; The narrow input terminal is connected to one end of the other side edge of the U-shaped structure of the first input assembly, which is close to the opening of the U-shaped structure of the first input assembly; The central line of the narrow input terminal extending along the second direction is overlapped with the central line of the side edge of the U-shaped structure of the first input assembly connected with the narrow input terminal; the dimension of the wide input terminal along the third direction is larger than the width of the side edge of the U-shaped structure of the first input assembly, and the dimension of the narrow input terminal along the third direction is smaller than the width of the side edge of the U-shaped structure of the first input assembly.
5. The power divider of claim 4, wherein two common mode absorption resistors are disposed in parallel between two sides of the U-shaped structure of the first input assembly.
6. The power divider of claim 5, wherein the first resonant assembly comprises a resonant input line, a resonant body, and a resonant output line; the resonance input line and the resonance output line are right-angle structures formed by microstrip lines; The resonator body is a hollow H-shaped structure formed by microstrip lines; the H-shaped structure is symmetrical about the second central line, the opening of the H-shaped structure faces the extending direction parallel to the second central line, the H-shaped structure comprises a straight edge and a concave edge, the extending direction of the straight edge of the H-shaped structure is parallel to the third direction, and the width of the straight edge is smaller than that of the concave edge; the resonant input line comprises a first right-angle side and a second right-angle side, the resonant output line comprises a third right-angle side and a fourth right-angle side, the first right-angle side and the third right-angle side extend along a first direction, and the second right-angle side and the fourth right-angle side extend along a second direction; The second right-angle side and the fourth right-angle side are positioned on the same side of the first central line and have the same length, and one ends of the second right-angle side and the fourth right-angle side, which are close to the first central line, are positioned on the first central line; The H-shaped structure is arranged between the second right-angle side and the fourth right-angle side, a gap is reserved between the second right-angle side and the H-shaped structure, and a gap is reserved between the fourth right-angle side and the H-shaped structure; the first right angle side is connected between the first input assembly and the second right angle side, and the third right angle side is connected between the fourth right angle side and the first power distribution assembly.
7. The power divider of claim 6, wherein a centerline of the U-shaped structure of the first input assembly extending in the second direction coincides with the first centerline; The first right-angle side coincides with the first central line, and the first right-angle side is connected between the bottom edge of the U-shaped structure of the input assembly and the second right-angle side.
8. The power divider of claim 7, wherein the first power distribution assembly comprises a first distribution body, a first distribution line, a second distribution body, and a second distribution line; the first distribution line and the second distribution line are symmetrically arranged about the first centerline; one end of the first distribution line is connected to the first distribution body, one end of the second distribution line is connected to the second distribution body, the other end of the first distribution line is connected to the other end of the second distribution line, and the first distribution line and the second distribution line are connected to the second right-angle side through the third right-angle side in a common mode, and the third right-angle side coincides with the first central line.
9. The power distributor according to claim 8, wherein the first distribution line comprises a first distribution sub-segment, a second distribution sub-segment and a third distribution sub-segment, the first distribution sub-segment and the third distribution sub-segment each extending in a third direction, the second distribution sub-segment extending in a second direction, the second distribution sub-segment being connected between the first distribution sub-segment and the third distribution sub-segment; The second distribution line comprises a fourth distribution sub-section, a fifth distribution sub-section and a sixth distribution sub-section, wherein the fourth distribution sub-section and the sixth distribution sub-section extend along a third direction, the fifth distribution sub-section extends along a second direction, and the fifth distribution sub-section is connected between the fourth distribution sub-section and the sixth distribution sub-section; the first distribution body and the second distribution body are of the same U-shaped structure as the input assembly; An isolation resistor is arranged between the third distribution sub-segment and the sixth distribution sub-segment.
10. The power divider of claim 9, wherein the third substrate includes a second surface, the second surface being another end surface of the third substrate along the third direction; The microstrip module further comprises a second microstrip unit comprising a second input component and a second input terminal, a second resonant component, a second power distribution component and a second output terminal, The projection of the second input assembly to the first surface along the first direction is overlapped with the first input assembly, the projection of the second resonance assembly to the first surface along the first direction is overlapped with the first resonance assembly, and the projection of the second power distribution assembly to the first surface along the first direction is overlapped with the first power distribution assembly; the projection of the second input terminal to the first surface along the first direction is mirror symmetry with the first input terminal about the first center line; The projection of the second output terminal to the first surface along the first direction is mirror-symmetrical to the first output terminal about the center line of the U-shaped structure of the first distribution body.

Description

Self-packaging type reflection-free differential filtering power divider with substrate integrated suspension strip line and broadband common-mode absorption characteristic Technical Field The invention belongs to the technical field of radio frequency, and particularly relates to a self-packaged type reflection-free differential filtering power divider with a substrate integrated suspension strip line and broadband common-mode absorption characteristics. Background In microwave rf systems, filters and power splitters are two basic and critical types of microwave devices. Along with the rapid development of modern wireless communication, radar detection and other systems towards high frequency, high integration and high performance, the design of the existing filtering power divider is mostly based on traditional planar structures such as microstrip lines, strip lines and the like, and although the functional integration is realized to a certain extent, a plurality of key technical challenges are faced, for example, the anti-interference capability of devices designed based on the traditional planar structures such as microstrip lines, strip lines and the like is common. Disclosure of Invention In order to solve the problems in the prior art, the embodiment of the application provides a self-packaged type reflection-free differential filtering power divider with a substrate integrated suspension strip line and broadband common-mode absorption characteristics, and the self-packaged type reflection-free differential filtering power divider with the broadband common-mode absorption characteristics, which is provided by arranging a first packaging layer and a second packaging layer on two sides of a circuit layer, can form a self-packaging structure, inhibit external electromagnetic interference and leakage of internal signals, can provide a complete and stable grounding layer, effectively release common-mode noise, improve a common-mode rejection ratio, and can realize electromagnetic isolation with other modules so as to reduce crosstalk. The technical problems to be solved by the application are realized by the following technical scheme: The embodiment of the application provides a self-packaged reflection-free differential filtering power divider with a substrate integrated suspension strip line and broadband common-mode absorption characteristic, which comprises a first packaging layer, a first air cavity layer, a circuit layer, a second air cavity layer and a second packaging layer. The first packaging layer comprises a first substrate, wherein metal layers are arranged on two end faces of the first substrate in the first direction, the first air cavity layer comprises a second substrate, metal layers are arranged on two end faces of the second substrate in the first direction, the first air cavity layer forms a penetrating air cavity structure in the first direction, the circuit layer comprises a third substrate, microstrip modules formed by microstrip lines are arranged on two end faces of the third substrate in the first direction and used for carrying out filtering response and power distribution on input signals, the second air cavity layer comprises a fourth substrate, metal layers are arranged on two ends of the fourth substrate in the first direction, the second air cavity layer forms a penetrating air cavity structure in the first direction, the second packaging layer comprises a fifth substrate, metal layers are arranged on two ends of the fifth substrate in the first direction, the first substrate, the second substrate, the third substrate, the fourth substrate and the fifth substrate are all made of insulating materials, and the first packaging layer, the first air cavity layer, the circuit layer, the second air cavity layer and the second packaging layer are stacked in sequence in the first direction. In one possible implementation manner of the application, the third substrate comprises a first surface, the first surface is one end face of the third substrate along the first direction, the microstrip module comprises a first microstrip unit, the first microstrip unit is arranged on the first surface, the first microstrip unit comprises a first input component and a first input terminal, a first resonance component, a first power distribution component and a first output terminal, the first input terminal is connected to the input end of the first input component, the first output terminal is connected to the output end of the first power distribution component, and the first resonance component is connected between the first input component and the first power distribution component. In one possible implementation manner of the application, the first surface is provided with a first central line and a second central line, the first central line extends along the second direction, the second central line extends along the third direction, the first direction, the second direction and the thi