CN-224217691-U - Z-type waveguide connection structure suitable for millimeter wave application

Abstract

The utility model discloses a Z-shaped waveguide connection structure suitable for millimeter wave application, which relates to the technical field of millimeter wave waveguide transmission and aims to solve the problems that the conventional rectangular waveguide or ridge waveguide is commonly used for transmitting and leading out millimeter wave signals, but the structures have large volume, poor coupling inhibition and complex processing, and the technical scheme is characterized by comprising a printed circuit board and a metal waveguide part, the circuit board is characterized in that a first waveguide through hole penetrating up and down is formed in the printed circuit board, the upper end of the metal waveguide part is fixedly attached to the printed circuit board, a second waveguide through hole for the waveguide to pass out is formed in the metal waveguide part, and a chip package body is fixedly connected to one surface, far away from the metal waveguide part, of the printed circuit board. The structure is simple and compact, the complex auxiliary shielding design is not needed, the manufacture is easy, and the packaging occupation space is small.

Inventors

• ZHANG TIANYU
• QU HENG
• LUO WEI
• Mao Yinwei
• ZHOU JIMING

Assignees

• 圭步微电子(南京)有限公司

Dates

Publication Date

20260508

Application Date

20250520

Claims (5)

1. 1. The Z-shaped waveguide connecting structure suitable for millimeter wave application comprises a printed circuit board (1) and a metal waveguide piece (2) and is characterized in that a first waveguide through hole (3) penetrating up and down is formed in the printed circuit board (1), the upper end of the metal waveguide piece (2) is attached and fixed with the printed circuit board (1), a second waveguide through hole (4) for a waveguide to pass out is formed in the metal waveguide piece (2), and a chip package body (5) is fixedly connected to one surface, far away from the metal waveguide piece (2), of the printed circuit board (1).
2. 2. The Z-waveguide connection suitable for millimeter wave applications according to claim 1, characterized in that the cross section of the first waveguide via (3) is Z-shaped.
3. 3. The Z-shaped waveguide connection structure suitable for millimeter wave applications according to claim 1, wherein the metal waveguide (2) has two structures, the cross section of the second waveguide through hole (4) in the metal waveguide (2) is of a Z-shaped structure, and the second waveguide through hole (4) is matched with the first waveguide through hole (3).
4. 4. The Z-waveguide connection structure for millimeter wave applications as defined in claim 3, wherein the other metal waveguide (2) has a fixed connection with metal posts (6), and the metal posts (6) are distributed at equal intervals outside the second waveguide through hole (4).
5. 5. The Z-shaped waveguide connection structure suitable for millimeter wave application of claim 1, wherein the chip package (5) comprises a chip body (51), a package shell (52) is fixedly connected to the outer side of the chip body (51), an antenna (53) for emitting a waveguide of the chip body (51) is fixedly connected to the lower end of the package shell (52), a solder ball array (54) is fixedly connected to the lower end of the package shell (52), and the package shell (52) is fixedly connected with the printed circuit board (1) through the solder ball array (54).

Description

Z-type waveguide connection structure suitable for millimeter wave application Technical Field The utility model relates to the technical field of millimeter wave waveguide transmission, in particular to a Z-shaped waveguide connecting structure suitable for millimeter wave application. Background The millimeter wave radar is widely applied to Advanced Driving Assistance Systems (ADAS) such as automatic driving, collision early warning, lane keeping and the like, the systems generally work in a frequency range of 76 to 81GHz, and strict requirements of low loss, high isolation and compact packaging are provided for a signal transmission structure. The prior art scheme has the following defects that the traditional rectangular waveguide or ridge waveguide is commonly used for transmitting and leading out millimeter wave signals, but the problems of large volume, poor coupling inhibition, complex processing and the like of the structures are existed, and the requirements of signal integrity and miniaturization are difficult to meet simultaneously. Disclosure of utility model The utility model aims to provide a waveguide connection structure with a Z-shaped cross-section outline, which is used for realizing stable and efficient transmission of millimeter wave signals between a PCB and a metal waveguide or a packaging module so as to avoid dependence on a complex structure or an additional shielding element and is suitable for millimeter wave application. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a Z waveguide connection structure suitable for millimeter wave is used, includes printed circuit board and metal waveguide spare, the inside first waveguide through-hole that runs through from top to bottom of having seted up of printed circuit board, metal waveguide spare upper end is fixed with the printed circuit board laminating, the inside second waveguide through-hole that supplies the waveguide to spread of having seted up of metal waveguide spare, the one side fixedly connected with chip package body of metal waveguide spare is kept away from to the printed circuit board. By adopting the technical scheme, the waveguide connecting structure forms a continuous closed electromagnetic channel along the direction of the signal transmission path, so that electromagnetic field distribution can be effectively restrained, isolation performance is improved, and signal reflection loss is reduced. Further, the cross section of the first waveguide through hole is in a Z-shaped structure. By adopting the technical scheme, the Z-shaped and standard rectangular waveguide interface is flexibly compatible, different cost and assembly requirements are met, the structure is simple and compact, the complex auxiliary shielding design is not needed, and the manufacturing is easy. Further, the metal waveguide part is provided with two structures, wherein the cross section of the second waveguide through hole in the metal waveguide part is of a Z-shaped structure, and the second waveguide through hole is matched with the first waveguide through hole. By adopting the technical scheme, if the metal waveguide port adopts a Z-shaped structure, the metal waveguide port is directly and accurately aligned with the Z-shaped through hole of the PCB, so that high-efficiency connection is realized. Further, the upper end of the other metal waveguide piece is fixedly connected with metal columns, and the metal columns are distributed at equal intervals outside the second waveguide through hole. By adopting the technical scheme, if the waveguide port is in the form of a standard rectangular waveguide, a circle of metal column or shielding structure can be wound at the interface, so that the electromagnetic coupling performance is enhanced and the shielding effect is improved. Further, the chip package body comprises a chip body, a package shell is fixedly connected to the outer side of the chip body, an antenna for emitting a chip body waveguide is fixedly connected to the lower end of the package shell, a solder ball array is fixedly connected to the lower end of the package shell, and the package shell is fixedly connected with the printed circuit board through the solder ball array. By adopting the technical scheme, the structure shows excellent modal restriction characteristics and manufacturing feasibility under the millimeter wave frequency band, effectively solves the limitation of the traditional waveguide connection mode, and provides a reliable and efficient signal interconnection scheme for the high-integration vehicle-mounted millimeter wave radar system. In summary, the beneficial technical effects of the utility model are as follows: 1. The flexible compatible Z-shaped and standard rectangular waveguide interface is adopted, the flexible compatible Z-shaped and standard rectangular waveguide interface is suitable for different cost and assem