CN110739538A

CN110739538A - Radio frequency interconnection method of TR (transmitter-receiver) component and antenna array

Info

Publication number: CN110739538A
Application number: CN201910929152.2A
Authority: CN
Inventors: 朱贵德; 熊文毅; 王彪; 蓝海
Original assignee: Southwest Electronic Technology Institute No 10 Institute of Cetc
Current assignee: CETC 10 Research Institute; Southwest Electronic Technology Institute No 10 Institute of Cetc
Priority date: 2019-09-28
Filing date: 2019-09-28
Publication date: 2020-01-31

Abstract

The invention discloses a radio frequency interconnection method of TR components and an antenna array surface, and aims to provide a radio frequency interconnection method which is high in density of channels, good in air tightness and easy to disassemble, assemble and maintain.

Description

Radio frequency interconnection method of TR (transmitter-receiver) component and antenna array

Technical Field

The invention belongs to the technical field of microwaves, and particularly relates to a radio frequency interconnection method of high-density airtight TR components and an antenna array surface.

Background

The space between the phased array antenna units above 30GHz is basically compressed within 5mm, and a plurality of devices such as an antenna array surface, a feeder line, a TR component, a power supply, a cooling system and the like are arranged in the phased array antenna and are the most complex parts in the whole radar.

The TR module generally means that the TR module is terminated with the antenna, is terminated with the if processing unit to constitute radio transceiver systems, in the phased array antenna, TR modules are associated with each other for every antenna units, therefore, there are thousands or even tens of thousands of TR modules in radar, the conventional TR module is a planar assembly structure, characterized in that all circuit modules are assembled planar on one or both sides of the package, which is a rectangular "brick" type structure, which is large in volume and weight, which is a non-conformal structure that requires mechanical connection of many electronic components when forming a front, making the antenna thicker, and the re-packaging difficulty is to provide excellent radio frequency and high density low frequency feedthrough, which is a conventional T/R module assembly structure, which has not reached the volume, weight, cost, and high density interconnection capability of three-dimensional rf interconnection modules proposed by new generation products, and has not reached the requirements of three-dimensional rf interconnection components, three-dimensional rf interconnection, rf.

Disclosure of Invention

Aiming at the defects of the existing radio frequency interconnection method, the invention provides radio frequency interconnection methods which have high channel density, good air tightness and easy disassembly and maintenance.

In order to solve the technical problem, the invention provides the following technical scheme that radio frequency interconnection methods of a TR component and an antenna array surface are technically characterized by comprising the steps that patch antennas 1 distributed according to linear array arrangement are fixed on an antenna bearing medium substrate 2, the antenna bearing medium substrate 2 tightly presses an outer conductor 7 of a TR component structural part through a fuzz button metal substrate 3, a polymer-based composite medium tube 5 vertically corresponding to the array surface below the patch antennas 1 penetrates through the fuzz button metal substrate 3 and is tightly attached to the end surface of a radio frequency connecting insulator 14, the radio frequency connecting insulator 14 sintered on the outer conductor 7 of the TR component structural part is formed by insulator welding flux 10 , the polymer-based composite medium tube 5 is assembled in a stepped hole of the outer conductor 7 of the TR component structural part, the fuzz button inner core 4 is tightly pressed on a T-shaped probe 12 through a pore channel of a fuzz button inner core sleeve 13, the T-shaped probe 12 is connected with a T-shaped head of an inner conductor 9 of the insulator through the stepped hole at the bottom of the polymer-based composite medium tube 5, the inner conductor 9 is connected with a glass medium 8 filled in the hole of the insulator outer conductor 6, the insulator and a coaxial cavity matched with air, and the coaxial glass cavity is connected with the insulator, and the coaxial conductor 9, so that the coaxial signal transmission end of the coaxial insulator is.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the fuzz button 4 and the insulator 14 (comprising the insulator outer conductor 6, the insulator filled with the glass medium 8 and the insulator probe 9) are used as main media of radio frequency transmission, the fuzz button inner core 4, the T-shaped probe 12, the polymer-based composite medium tube 5 and the fuzz button metal substrate 3 form a coaxial transmission structure to realize radio frequency signal transmission, an air cavity 15 is formed on the upper end face of the insulator inner conductor 9 and the upper end face of the glass medium insulator 8, the insulator inner conductor 9 provides an airtight environment through the glass medium insulator 8 filled in the hole of the insulator outer conductor 6 and the air coaxial matching cavity 11 below the insulator, and electromagnetic shielding and isolation are provided at the same time, so that the technical problems of vertical interconnection, electromagnetic compatibility, heat dissipation and the like of radio frequency signals assembled in a high density manner of a laminated structure are solved, the process is simple, and the airtightness is good, the feedthrough of the fuzz button 4 and the insulator 14 greatly prolongs the service life of the fuzz button 12.

According to the invention, radio frequency insulators are adopted to realize transmission of radio frequency signals of a TR component, simultaneously, an insulator inner conductor is formed by sintering glass, and finally, an insulator 14 is sintered on an outer conductor 7 of a TR component structural member by adopting insulator welding flux 10 to realize air tightness of the TR component.

According to the high-density airtight TR component and the radio frequency interconnection method of the antenna array surface, due to the fact that the radio frequency signals are tightly attached to the radiation surface after being transmitted, amplified and received, loss caused by a transmission channel is reduced, efficiency is improved, the output power of a single T/R component is improved, the number of the T/R components is increased, the transmitting power of a radar can be increased, and therefore the acting distance is expanded. The method for interconnecting the fuzz buttons and the insulators can meet all array arrangement requirements that the array element spacing is larger than 2.4mm, and is particularly suitable for application requirements of high-integration-level multi-channel large-scale array surfaces. The radio frequency interconnection scheme can be very simple and easy to disassemble, test and maintain.

Drawings

Fig. 1 is a longitudinal perspective view of the radio frequency interconnection of the TR module of the present invention with an antenna array.

Fig. 2 is a transverse cross-sectional view of the radio frequency interconnect portion of fig. 1.

In the figure: the antenna comprises a patch antenna 1, an antenna carrying medium substrate 2, a hair button metal substrate 3, a hair button inner core 4, a polymer-based composite medium tube 5, an insulator outer conductor 6, a 7 TR component structural part outer conductor, a glass medium insulator 8, an insulator inner conductor 9, an insulator solder 10, an air coaxial matching cavity 11, a probe 12T-shaped, a hair button inner core sleeve 13, a radio frequency connecting insulator 14, an air cavity 15, a 16 TR component, a multifunctional chip 17 and a composite multilayer printed board 18.

In order to make the object and technical solution of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

Detailed Description

Referring to fig. 1 and 2, according to the invention, patch antennas 1 distributed according to a linear array arrangement are fixed on an antenna bearing medium substrate 2, the antenna bearing medium substrate 2 tightly presses an outer conductor 7 of a TR component structural member through a fuzz button metal substrate 3, a polymer-based composite medium tube 5 vertically corresponding to a front surface below the patch antennas 1 penetrates through the fuzz button metal substrate 3 and is tightly attached to an end surface of a radio frequency connecting insulator 14, an insulator solder 10 is adopted to form a radio frequency connecting insulator 14 sintered on the outer conductor 7 of the TR component structural member, the polymer-based composite medium tube 5 is assembled in a stepped hole of the outer conductor 7 of the TR component structural member correspondingly, a fuzz button inner core 4 tightly presses a T-shaped probe 12 through a fuzz button inner core sleeve 13, the T-shaped probe 12 is connected with a T-shaped head of an inner conductor 9 through a stepped hole at the bottom of the polymer-based composite medium tube 5, the inner conductor 9 is connected with an interconnection end of the TR component through a glass medium insulator 8 filled in the hole of the outer conductor 6 and an air coaxial matching cavity 11 below the insulator, and the T-shaped head of the insulator 9 and the glass medium insulator 8 form a good radio frequency signal transmission.

In an alternative embodiment,

(1) the fuzz button metal substrate 3 is evenly added with soldering flux and soldering paste by means of a steel mesh. The antenna array substrate 2 is fixed with the fuzz button metal substrate 3 through a positioning pin, and then the welding of the antenna array substrate 2 and the fuzz button metal substrate 3 is completed under a set temperature curve through a vacuum gas phase reflow soldering furnace.

The fuzz button inner core 4 is fixed in the fuzz button inner core sleeve 13 through a laser spot welding technology, then the T-shaped probe 12 and the fixed fuzz button inner core 4 are embedded into the polymer-based composite medium tube 5 which is perforated in advance, and then the assembled fuzz button inner core 4, the T-shaped probe 12, the fuzz button inner core sleeve 13 and the polymer-based composite medium tube 5 are jointly plugged into the corresponding position of the fuzz button metal substrate 3, so that coaxial radio frequency transmission from an antenna array surface to the end surface of the TR component is realized by adopting the fuzz button.

The radio frequency connection insulator 14 is welded to the TR assembly structural member outer conductor 7 by insulator solder 10: the end face of the insulator probe 9 is flat and has no radian at the position where the insulator probe 9 is contacted with the T-shaped probe 12, and meanwhile, the insulator probe 9 is sintered in the insulator outer conductor 6 by using an insulator filled glass medium 8; the radio frequency connection insulator 14 realizes the radio frequency interconnection between the inside and the outside of the TR component through the insulator probe 9, wherein the existence of the air coaxial matching cavity 11 can better adapt to the high-performance transmission of radio frequency of each frequency band.

The polymer-based composite medium pipe 5 can be a polytetrafluoroethylene PTFE medium pipe 5, and can also be a composite medium pipe consisting of polytetrafluoroethylene PTFE and ceramic.

When the air coaxial matching cavity is used, the mutual positions of a plurality of fuzz button insulator pairs can be changed according to the application requirements of different layout forms and frequency bands of the antenna array surface, and the characteristic impedance and the height of the air coaxial matching cavity 11 can be flexibly adjusted to achieve good matching. In a specific working frequency band, good transmission of high-frequency signals and good shielding of each channel can be realized through simulation design.

The present invention has been described in further detail with reference to the specific embodiments thereof as illustrated and described above, and is further illustrated and described in detail, it is not intended to limit the invention to the details of the preferred embodiments, but rather, it is to be understood that various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention, as defined by the appended claims.

Claims

The radio frequency interconnection method of the TR components and the antenna array surface is technically characterized in that patch antennas (1) distributed according to linear array arrangement are fixed on an antenna bearing medium substrate (2), the antenna bearing medium substrate (2) is tightly pressed on an outer conductor (7) of a TR component structural member through a fuzz button metal substrate (3), a polymer-based composite medium tube (5) vertically corresponding to the array surface below the patch antennas (1) penetrates through the fuzz button metal substrate (3) and is tightly attached to the end surface of a radio frequency connecting insulator (14), the radio frequency connecting insulator (14) which is integrally sintered on the outer conductor (7) of the TR component structural member is made of insulator solder (10) , the corresponding polymer-based composite medium tube (5) is assembled in a stepped hole of the outer conductor (7) of the TR component structural member, a fuzz button inner core (4) is interconnected through a pore passage of a fuzz button inner core sleeve (13) and is tightly pressed on a T-shaped probe (12), the T-shaped probe (12) is connected with a T-shaped insulator inner conductor (9) connected through a stepped hole at the bottom of the polymer-based composite medium tube (5), the insulator inner conductor (9) is connected with an insulator inner conductor head, and is connected with an insulator inner conductor (8) of an insulator through an insulator glass dielectric glass head of an insulator and a coaxial glass transmission medium head of a coaxial medium transmission structure, so as to form a coaxial transmission head, and a coaxial signal transmission structure, wherein.
2. The method of radio frequency interconnecting a TR module to an antenna array of claim 1, wherein: the linear array surface substrate (2) is fixed with the fuzz button metal substrate (3) through a positioning pin, and then the welding of the antenna array surface substrate (2) and the fuzz button metal substrate (3) is completed under a set temperature curve through a vacuum gas phase reflow oven.
3. The method of radio frequency interconnecting a TR module to an antenna array of claim 1, wherein: the fuzz button inner core (4) is fixed in the fuzz button inner core sleeve (13) through a laser spot welding technology, then the T-shaped probe (12) and the fixed fuzz button inner core (4) are embedded into the polymer-based composite medium tube (5) with a hole formed in advance, and then the assembled fuzz button inner core (4), the T-shaped probe (12), the fuzz button inner core sleeve (13) and the polymer-based composite medium tube (5) are jointly plugged into the corresponding position of the fuzz button metal substrate (3), so that the coaxial radio frequency transmission from the antenna array surface to the end surface of the TR component is realized.
4. The method of radio frequency interconnecting a TR module to an antenna array of claim 1, wherein: the radio frequency connection insulator (14) is welded to the outer conductor (7) of the TR component structural part through insulator welding materials (10).
5. The method of radio frequency interconnecting a TR module to an antenna array of claim 1, wherein: and at the position where the insulator probe (9) is contacted with the T-shaped probe (12), the end face of the insulator probe (9) is flat and has no radian, and meanwhile, the insulator probe (9) is sintered in the insulator outer conductor (6) by using an insulator filled glass medium (8).
6. The method of radio frequency interconnecting a TR module to an antenna array of claim 1, wherein: and the radio frequency connection insulator (14) realizes the radio frequency interconnection between the inside and the outside of the TR component through the insulator probe (9).
7. The method of radio frequency interconnecting a TR module to an antenna array of claim 1, wherein: the polymer-based composite medium pipe (5) is a polytetrafluoroethylene PTFE medium pipe or a composite medium pipe consisting of polytetrafluoroethylene PTFE and ceramic.