阅读说明：本技术 带空气环同轴连接器 (Coaxial connector with air ring ) 是由 夏侯海 阮文州 陈鲲洪 于 2020-08-06 设计创作，主要内容包括：本发明公开了一种带空气环同轴连接器,包括内导体、介质和外导体,内导体左侧位于介质内部,外导体左侧环绕介质,介质右侧外导体和内导体之间形成空气环,内导体左端与外部探针相连,连接器安装在模块壳体内,探针通过压接、焊接或粘接连接在微带传输线上,外部探针与其他模块或连接器互联,本发明形式简单,提升了连接器与微带互联的高频性能,特别是在Ka频段改善了传输特性,减小了回波损耗,简化了工作于毫米波频段连接器安装壳体的加工难度,易于装配,适合于大规模低成本批生产,采用玻璃介质将连接器一体烧结成形,可以实现微波模块内部气密条件下与外界进行信号的传输,提升内部含有裸芯片的微波模块的可靠性。(The invention discloses a coaxial connector with an air ring, which comprises an inner conductor, a medium and an outer conductor, wherein the left side of the inner conductor is positioned in the medium, the left side of the outer conductor surrounds the medium, an air ring is formed between the outer conductor on the right side of the medium and the inner conductor, the left end of the inner conductor is connected with an external probe, the connector is arranged in a module shell, the probe is connected on a microstrip transmission line through crimping, welding or bonding, and the external probe is interconnected with other modules or connectors. The reliability of the microwave module with the bare chip inside is improved.)

1. The coaxial connector with the air ring comprises an inner conductor (205), a medium (203) and an outer conductor (206), and is characterized in that the left side part of the inner conductor (205) is located inside the medium (203), the left side part of the outer conductor (206) surrounds the medium (203), an air ring (209) is formed between the outer conductor (206) and the inner conductor (205) on the right side of the medium (203), the left end of the inner conductor (205) is connected with an external probe (204), the connector (202) is installed in a module shell (201), the probe (210) is connected to a microstrip transmission line (208) through crimping, welding or bonding, and the microstrip transmission line (208) is installed on a patch board (207).

2. The coaxial connector with air ring according to claim 1, characterized in that a metal ring (211) is mounted in the air dielectric coaxial part of the outer conductor (206), the metal ring (211) is press-fitted into the outer conductor (206), and an air ring (209) is formed between the metal ring (211) and the inner conductor (205).

3. The coaxial connector with air ring according to claim 1 or 2, characterized in that the right end of the inner conductor (205) forms a probe (210) through the air ring (209).

4. The coaxial connector with the air ring according to claim 1 or 2, characterized in that the dielectric (203) is an insulating dielectric and is made of glass, and the inner conductor (205), the dielectric (203) and the outer conductor (206) can be sintered into a whole.

5. The coaxial connector with the air ring according to claim 4, wherein the outer conductor (206) surrounds the dielectric (203) and is provided with two inner bosses (212) at the top and the bottom of the partial inner wall in the direction parallel to the inner conductor (205), and the inner bosses (212) are formed integrally with the outer conductor (206).

6. The coaxial connector with air ring according to claim 4, characterized in that the inner conductor (205) is provided with two outer bosses (213) at the top and bottom of the partial outer wall in the medium (203) along the direction parallel to the inner conductor (205), and the outer bosses (213) are integrated with the inner conductor (205).

7. The coaxial connector with the air ring according to claim 1 or 2, characterized in that the dielectric (203) forms a glass dielectric coaxial with the corresponding parts of the inner conductor (205) and the outer conductor (206), and the air ring (209) forms an air dielectric coaxial with the corresponding parts of the inner conductor (205) and the outer conductor (206).

8. The coaxial connector with air ring according to claim 5, wherein the outer conductor (206) of the air dielectric coaxial portion is suspended to form a ring structure, the ring structure is integrally formed with the outer conductor (206) of the glass dielectric coaxial portion, or the ring structure is a separate metal ring assembly embedded in the outer conductor (206) of the glass dielectric coaxial portion.

9. The coaxial connector with air ring according to claim 5, wherein the characteristic impedance of the coaxial structure of the two parts of the coaxial structure of the air medium and the glass medium is about 50 ohms.

Technical Field

The invention relates to the field of antennas and microwaves, in particular to a coaxial connector with an air ring.

Background

In the microwave module, the radio frequency coaxial connector is assembled on a shell of the microwave module, so that transmission of radio frequency signals inside and outside the microwave module is realized. Due to the mismatch in the sizes of the rf coaxial connector and the microwave ic, an interposer is required to interconnect the rf coaxial connector and the microwave ic. The patch panel typically employs a microstrip circuit having a characteristic impedance of 50 ohms, and the probe of the rf coaxial connector is interconnected with one microstrip end of the patch panel, as shown in fig. 1.

The assembly module 100 shown in fig. 1 comprises a module housing 101, a radio frequency coaxial connector 102, a patch panel dielectric layer 107, and a microstrip line 108 with a characteristic impedance of 50 ohms on the patch panel. The radio frequency coaxial connector 102 comprises an external interconnection unit 104, a coaxial portion mounted in the housing 101, and a probe 105, wherein the probe 105 is connected to the microstrip line 108 by soldering, bonding or crimping.

The assembly profile of a conventional rf coaxial connector is shown in fig. 2, the coaxial section comprising an inner conductor connected to a probe 105, a dielectric 103, such as glass, and an outer conductor 106, the rf coaxial section having a characteristic impedance of 50 ohms. Conventional coaxial connectors interconnect with the microstrip 108, which introduces additional parasitic parameters due to transmission discontinuities. With the increase of the working frequency, the influence of the parasitic parameters can be increased, so that the return loss is deteriorated in the millimeter wave frequency band, and the transmission loss is increased until the application requirements cannot be met. In order to improve the performance of the conventional coaxial connector at high frequency, two methods are generally used, namely, the characteristic impedance of a microstrip line of an adapter plate is changed to counteract the influence of parasitic parameters caused by interconnection; the other is that an air coaxial matching section is added on a mounting shell of the connector to counteract the influence of parasitic parameters caused by interconnection of the probe and the microstrip. For the former method, with the difference of the material and the thickness of the adapter plate, the characteristic impedance of the microstrip line needs to be changed to be different, and a unified standard does not exist; for the latter, because additional processing needs to be added on the mounting shell, on one hand, the processing difficulty is increased, and on the other hand, for millimeter wave frequency band application, the assembling precision requirement of the connector is strict, which brings difficulty to large-scale batch production.

From the above, the performance of the conventional coaxial connector and the microstrip interconnection is deteriorated due to the influence of parasitic parameters caused by discontinuity, and the requirements of millimeter wave frequency band performance and large-scale batch production cannot be met.

Disclosure of Invention

The invention aims to provide a coaxial connector with an air ring to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a take air ring coaxial connector, includes inner conductor, medium and outer conductor, inner conductor left side part is located inside the medium, outer conductor left side part encircles the medium, forms the air ring between medium right side outer conductor and the inner conductor, and the inner conductor left end links to each other with outside probe, and the connector is installed in the module casing, and the probe passes through crimping, welding or adhesive bonding connection on the microstrip transmission line, and the microstrip transmission line is installed on the keysets, and outside probe is interconnected with other modules or connectors.

As a further scheme of the invention: and a metal ring is arranged in the coaxial part of the air medium of the outer conductor, the metal ring is assembled in the outer conductor in a compression joint mode, and an air ring is formed between the metal ring and the inner conductor.

As a further scheme of the invention: the right end of the inner conductor forms a probe through an air ring.

As a further scheme of the invention: the medium is an insulating medium and is made of glass, and the inner conductor, the medium and the outer conductor can be sintered into a whole.

As a further scheme of the invention: the top and the bottom of the partial inner wall of the outer conductor surrounding the medium are respectively provided with two inner bosses along the direction parallel to the inner conductor, and the inner bosses and the outer conductor are integrated.

As a further scheme of the invention: the top and the bottom of the partial outer wall of the inner conductor in the medium are respectively provided with two outer bosses along the direction parallel to the inner conductor, and the outer bosses and the inner conductor are integrated.

As a further scheme of the invention: the medium and the corresponding part of the inner conductor and the outer conductor form a glass medium coaxial line, and the air ring and the corresponding part of the inner conductor and the outer conductor form an air medium coaxial line.

As a further scheme of the invention: the outer conductor of the air dielectric coaxial part is suspended to form an annular structure, the annular structure and the outer conductor of the glass dielectric coaxial part are integrally processed to form the annular structure, or the annular structure is formed by assembling a single metal ring and embedding the outer conductor of the glass dielectric coaxial part.

As a further scheme of the invention: the characteristic impedance of the coaxial structure of the air medium coaxial part and the glass medium coaxial part is about 50 ohms.

Compared with the prior art, the invention has the beneficial effects that: the invention has simple form, improves the high-frequency performance of the interconnection of the connector and the microstrip, particularly improves the transmission characteristic in the Ka frequency band, reduces the return loss, the transmitting standing wave ratio at the high frequency end is obviously improved when the connector is interconnected with a microstrip transmission line, the transmitting standing wave ratio is less than 1.5 within the range of 50GHz, the processing difficulty of the installation shell of the connector working in a millimeter wave frequency band is simplified, the connector is easy to assemble, is suitable for large-scale low-cost batch production, and the connector achieves the effect of air sealing by integrally sintering and forming a medium, an inner conductor and an outer conductor, the signal transmission with the outside can be realized under the airtight condition inside the microwave module, which will improve the reliability of the microwave module containing the bare chip inside, the coaxial connector with the air ring is assembled into the outer conductor through the compression joint of the metal ring, so that the difficulty of controlling and filling the medium when the medium, the inner conductor and the outer conductor are integrally sintered and formed is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a conventional rf coaxial connector.

Fig. 2 is a schematic cross-sectional structure diagram of a conventional rf coaxial connector.

Fig. 3 is a schematic view of a coaxial connector with an air ring.

FIG. 4 is a schematic cross-sectional view of a coaxial connector with an air ring.

Fig. 5 is a schematic diagram of another expression of the coaxial connector with the air ring.

Fig. 6 is a schematic diagram of another expression of the coaxial connector with the air ring.

Fig. 7 is a graph comparing simulated standing waves of the coaxial connector with the air ring and the interconnection of the conventional coaxial connector and the interposer.

In the figure: module housing 201, connector 202, dielectric 203, outer probe 204, inner conductor 205, outer conductor 206, patch panel 207, microstrip transmission line 208, air ring 209, probe 210, metal ring 211, inner boss 212, outer boss 213.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the convenience of description of the present invention and for simplicity of description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it should be noted that the terms "mounted" and "connected" should be interpreted broadly, for example, the term "may be used in the present invention to refer to either a fixed connection, a detachable connection, a mechanical connection, an indirect connection via an intermediate medium, or an electrical connection.