CN218569442U - Millimeter wave elbow radio frequency connector - Google Patents

Abstract

The utility model discloses a millimeter wave elbow radio frequency connector, including straight connector main part and the elbow pipe of being connected with it, straight connector main part includes coaxial first casing, second casing and the center needle that sets up, the first end of second casing is fixed to be inlayed inside the first casing, and the inside fixed connection of first end has insulating medium, the center needle is fixed in the center of insulating medium with running through, center needle head portion stretches out the first casing outside, the swivel nut has been cup jointed to the outside of first casing, and first casing and center needle head portion all are located the swivel nut inside; the second end of the second shell is located outside the first shell and fixedly connected with the bent pipe, a coaxial cable penetrates through the bent pipe, and a cable core wire of the coaxial cable is connected with the tail portion of the central needle. The utility model discloses a connector has good electrical property and simple structure easily assembles.

Description

Millimeter wave elbow radio frequency connector

Technical Field

The utility model relates to a radio frequency coaxial connector specifically is a millimeter wave return bend radio frequency connector.

Background

An RF connector, i.e., a radio frequency coaxial connector, is a component attached to a cable or mounted on an instrument for electrical connection or disconnection of transmission lines, and is an indispensable key component of a coaxial transmission system. The history of RF connectors was short compared to other electronic components, and the UHF connectors that appeared in 1930 were the earliest RF connectors. In the second world war period, war requirements lead to the development of radar, radio and microwave communication fields, medium-sized series such as N, C, BNC, TNC and the like are generated, and small-sized products such as SMA, SMB, SMC and the like appear in 1958.

The RF connector is widely applied to the fields of radio frequency, microwave and millimeter wave test systems, radio frequency system microwave interconnection, modern communication and the like. In the millimeter wave connector, the compensation effect of the impedance discontinuity is not ideal due to the unavoidable right-angle structure of the bent connector, so the electrical performance is poor, and the overall electrical performance index of the component or the instrument is directly influenced!

Disclosure of Invention

An object of the utility model is to provide a millimeter wave return bend radio frequency connector has good electrical property and simple structure and easily assembles.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a millimeter wave elbow radio frequency connector comprises a straight connector body and an elbow connected with the straight connector body, wherein the straight connector body comprises a first shell, a second shell and a center needle which are coaxially arranged, the first end of the second shell is embedded in the first shell, an insulating medium is clamped in the first end, the center needle penetrates through the center of the insulating medium, the head of the center needle extends out of the first shell, a threaded sleeve is sleeved outside the first shell, and the first shell and the head of the center needle are both positioned in the threaded sleeve;

the second end of the second shell is located outside the first shell and fixedly connected with the bent pipe, a coaxial cable penetrates through the bent pipe, and a cable core wire of the coaxial cable is connected with the tail portion of the central needle.

Furthermore, a cable core wire, an LD-PTFE medium layer and a silver-plated copper strip wrapping outer conductor of the coaxial cable penetrate through the bent pipe.

Furthermore, the bent pipe is a metal bent pipe formed integrally, and the bent angle alpha is 90 +/-2 degrees.

Further, the elbow is welded to the second end of the second housing.

Further, the central needle is a 2.4mm straight structure.

Furthermore, an inner hole for inserting the cable core wire is formed in the tail end of the central needle, and the cable core wire is inserted in the inner hole and is connected with the central needle.

Further, the first end of the second housing is interference press-fit inside the first housing.

Furthermore, a first annular groove is formed in the outer side of the first shell, and a clamping ring is arranged in the first annular groove;

the inner side of the threaded sleeve is provided with a second annular groove, and the clamping ring is clamped with the second annular groove so as to fix the threaded sleeve.

Furthermore, the surface of the central needle is provided with an I-shaped annular groove, and the insulating medium is sleeved at the middle part of the annular groove.

Furthermore, the edge of an inner hole at the tail end of the central needle is provided with a chamfer.

The utility model discloses following beneficial effect has:

the utility model discloses a straight connector main part is connected with the return bend, constitutes a curved connector structure to combine coaxial cable as right angle transition carrier, compare in the connector of the curved structure of main part, not only part structure is simple, the processing degree of difficulty is little, with low costs and assembly easy operation is high-efficient, and voltage standing wave ratio is stable in 1.25@50GHz moreover, has good electrical property.

The utility model discloses only wear to establish inside the return bend around the package outer conductor coaxial cable's cable conductor, LD-PTFE dielectric layer and silver-plated copper strips, compare in will wear in the inside of return bend together with silver-plated copper wire outer shielding layer, because of penetrating the coaxial cable's in the return bend diameter is littleer to can obtain littleer bend radius, conveniently use the connector in narrow and small space, have good market demand and popularization and application prospect.

The surface of the central needle is provided with an I-shaped annular groove, the size of the I-shaped annular groove is optimized through HFSS simulation and an optimal value is obtained, the insulating medium is sleeved at the middle of the annular groove, so that the diameter of the central needle positioned at two sides of the insulating medium is larger than that of the central needle at the position of the central needle, impedance discontinuity caused by the diameter change of the central needle is compensated by high resistance, and meanwhile, the edge of an inner hole at the tail end of the central needle is provided with a chamfer angle, so that impedance mutation can be reduced, and high resistance compensation is realized; the utility model discloses a high resistance compensation of above-mentioned two places obtains better electric property.

Drawings

FIG. 1: the utility model is a schematic diagram of the appearance structure;

FIG. 2 is a schematic diagram: the schematic view of the sectional structure of the utility model;

FIG. 3: the utility model discloses a schematic three-dimensional structure of a coaxial cable;

FIG. 4: the utility model discloses a schematic view of a cross-sectional structure of a coaxial cable;

in the figure: 1. a first housing; 2. a second housing; 3. a threaded sleeve; 4. a central needle; 5. an insulating medium; 6. a snap ring; 7. a cable core; 8. wrapping the outer conductor with silver-plated copper strips; 9. a metal bent pipe; 10. a cable jacket; 11. a straight connector body; 12. an LD-PTFE medium layer; 13. silver-plated copper wire outer shielding layer.

Detailed Description

The following examples are provided to explain the present invention in detail, but not to limit the present invention.

As shown in fig. 1-2, a millimeter wave bent pipe radio frequency connector comprises a straight connector main body 11 and a bent pipe 9 connected with the straight connector main body, wherein the bent pipe 9 is an integrally formed metal bent pipe, the bent angle α of the bent pipe is 90 ± 2 °, a coaxial cable is arranged in the bent pipe 9 in a penetrating manner, the structure of the coaxial cable is as shown in fig. 3-4, the coaxial cable sequentially comprises a cable core wire 7 (namely, a silver-plated copper inner conductor), an LD-PTFE dielectric layer 12, a silver-plated copper strip lapped outer conductor 8, a silver-plated copper wire outer shielding layer 13 and a cable outer cover 10 (namely, an FEP outer sheath) from inside to outside, the cable core wire 7, the LD-PTFE dielectric layer 12 and the silver-plated copper strip lapped outer conductor 8 of the coaxial cable are arranged in the bent pipe 9 in a penetrating manner, and the cable outer cover 10 and the silver-plated copper wire outer shielding layer 13 of the coaxial cable do not penetrate through the bent pipe 9, so that a smaller bending radius can be obtained, and the connector can be conveniently used in a narrow space;

the straight connector main body 11 comprises a first shell 1, a second shell 2 and a central needle 4 which are coaxially arranged, wherein the central needle 4 is of a 2.4mm straight structure, the first end of the second shell 2 is in interference press fit in the first shell 1, specifically, a first step is arranged on the inner surface of the first shell 1, and a second step is arranged on the outer surface of the first end of the second shell 2, so that the vertical end surface of the second step is abutted against one end of the first shell 1, the transverse end surface of the second step is in interference press fit with the transverse end surface of the first step, and the end part of the first end of the second shell 2 is abutted against the vertical end surface of the second step; a first annular groove is formed in the outer side of the first shell 1, a clamping ring 6 is arranged in the first annular groove, a threaded sleeve 3 is sleeved outside the first shell 1, a second annular groove is formed in the inner side of the threaded sleeve 3, the clamping ring 6 is located between the threaded sleeve 3 and the first shell 1, when the threaded sleeve 3 is sleeved outside the first shell 1, the clamping ring 6 and the second annular groove are clamped to fix the threaded sleeve 3, and the threaded sleeve 3 is prevented from falling from the left end of the first shell 1 in the using process; an insulating medium 5 is fixedly connected inside the first end of the second shell 2, a central needle 4 is penetratingly connected to the center of the insulating medium 5, the head of the central needle 4 extends out of the first shell 1 and is positioned inside the threaded sleeve 3, and the tail end of the central needle 4 is provided with an inner hole for inserting a cable core wire 7 of a coaxial cable so that one end of the cable core wire 7 is positioned in the inner hole and is abutted against the bottom of the inner hole;

the surface of the central needle 4 is provided with an I-shaped annular groove, the insulating medium 5 is sleeved at the middle part of the annular groove, and the size of the I-shaped annular groove is optimized through HFSS simulation, so that impedance discontinuity caused by the diameter change of the central needle 4 is compensated by high resistance, the edge of an inner hole at the tail end of the central needle 4 is provided with a chamfer, the high resistance compensation is also realized at the joint of the inner hole and a cable core wire 7, and the electrical performance of the connector can be improved through the two high resistance compensations.

The second end of the second housing 2 is located outside the first housing 1 and welded to the bent pipe 9, specifically, a third step is provided on the inner surface of the second end of the second housing 2, one end of the bent pipe 9 is welded to the vertical end face of the third step, and the outer surface of the bent pipe is welded to the horizontal end face of the third step.

Before using, thereby earlier half cutting insulating medium 5 is half to centre gripping center needle 4, press into center needle 4 from the first end of second casing 2 again, press into first casing 1 inside to the first end of second casing 2 next, utilize snap ring 6 to fasten first casing 1 and second casing 2 again, then cup joint swivel nut 3 with first casing 1 outsidely, and guarantee that center needle 4 head is located swivel nut 3 inside, then insert the second end of second casing 2 with return bend 9, ensure that cable conductor 7 inserts the hole of 4 tail ends of center needle and with the bottom butt of hole, weld return bend 9 and the second end of second casing 2. The assembly is completed so far, and the assembly can be used subsequently.

Claims (10)

1. The millimeter wave bent pipe radio frequency connector is characterized by comprising a straight connector main body (11) and a bent pipe (9) connected with the straight connector main body, wherein the straight connector main body comprises a first shell (1), a second shell (2) and a center needle (4) which are coaxially arranged, the first end of the second shell (2) is embedded inside the first shell (1), an insulating medium (5) is clamped inside the first end, the center needle (4) penetrates through the center of the insulating medium (5) and the head of the center needle extends out of the first shell (1), a threaded sleeve (3) is sleeved outside the first shell (1), and the heads of the first shell (1) and the center needle (4) are located inside the threaded sleeve (3);

the second end of the second shell (2) is located outside the first shell (1) and is fixedly connected with the bent pipe (9), a coaxial cable penetrates through the bent pipe (9), and a cable core wire (7) of the coaxial cable is connected with the tail portion of the central needle (4).

2. The millimeter wave elbow radio frequency connector according to claim 1, wherein the cable core (7) of the coaxial cable, the LD-PTFE dielectric layer (12) and the silver-plated copper strip wrapped outer conductor (8) are arranged inside the elbow (9) in a penetrating manner.

3. The millimeter-wave elbow radio-frequency connector according to claim 2, wherein the elbow (9) is an integrally formed metal elbow with an angle α of 90 ± 2 °.

4. A millimeter wave elbow radio frequency connector according to claim 3, characterized in that the elbow (9) is welded to the second end of the second housing (2).

5. The millimeter-wave elbow radio-frequency connector according to claim 1, wherein the central needle (4) is of 2.4mm straight construction.

6. The millimeter wave elbow radio frequency connector according to claim 1 or 5, wherein the tail end of the central needle (4) is provided with an inner hole for plugging the cable core (7), and the cable core (7) is plugged in the inner hole so as to be connected with the central needle (4).

7. The millimeter wave elbow radio frequency connector according to any of claims 1 to 4, wherein the first end of the second housing (2) is interference press fit inside the first housing (1).

8. The millimeter wave elbow radio frequency connector according to any one of claims 1 to 4, wherein a first annular groove is formed in the outer side of the first housing (1), and a snap ring (6) is arranged in the first annular groove;

a second annular groove is formed in the inner side of the threaded sleeve (3), and the clamping ring (6) is clamped with the second annular groove to fix the threaded sleeve (3).

9. The millimeter wave elbow radio frequency connector according to any one of claims 1 to 4, wherein the surface of the central needle (4) is provided with an I-shaped annular groove, and the insulating medium (5) is sleeved in the middle of the annular groove.

10. The millimeter wave elbow radio frequency connector according to claim 6, wherein the inner hole edge of the tail end of the central needle (4) is chamfered.

Images