CN202405476U

CN202405476U - N-type radio frequency (RF) connector for cavity coupler

Info

Publication number: CN202405476U
Application number: CN2011205206214U
Authority: CN
Inventors: 翟本国; 郑志豹
Original assignee: HEFEI CHAOHAI MICROWAVE ELECTRONIC CO Ltd
Current assignee: HEFEI CHAOHAI MICROWAVE ELECTRONIC CO Ltd
Priority date: 2011-12-13
Filing date: 2011-12-13
Publication date: 2012-08-29
Anticipated expiration: 2021-12-13

Abstract

The utility model relates to an N-type RF connector for a cavity coupler. The N-type RF connector comprises a connector case with a flange, an insulator, and an inner conductor, wherein the insulator is a hollow cylinder; the inner conductor is embedded in a coaxial round hole of the insulator; a radial through-hole identical to the insulator in size is formed on one end of the inner cavity of the connector case close to the flange; and the insulator is embedded into the through-hole in a tight fit manner. The insulator may have a cylindrical shape or a regular polygonal columnar shape. The embedded insulator is substantially flush with the outer surface of the flange, with a protrusion length not larger than 1mm and a recession depth not larger than 0.5mm. The N-type RF connector provided by the utility model has the advantages that (1) the production procedures and the production cost are reduced by adopting reverse assembly; and (2) the length of the insulator is reduced greatly so as to improve the technical indexes of the coupler and to suppress the interference among signals.

Description

The N type radio frequency connector that a kind of cavity coupler is used

Technical field

The utility model relates to the N type radio frequency connector that a kind of cavity coupler is used.

Background technology

Cavity coupler adopts in mobile communications network is built as a kind of microwave power divider spare in a large number, and as the important accessory on the cavity coupler: N type radio frequency connector is also in a large amount of uses.N type radio frequency connector has threaded connection, and inner chamber and outer surface have the circular coaxial design feature, main stube cable or other wireless devices.The inner wire of connector is a kind of coaxial transmission aspect, and inner wire is supported by the polytetrafluoroethylene in the housings circular cavity.Because cavity coupler is to high performance requirement, thus the parameter of N type radio frequency connector is also proposed very high requirement, like very strictness of requirement to return loss and third order intermodulation.

The structural design of the N type radio frequency connector that uses on the cavity coupler at present is: (shape of ladder cylinder is consistent with the shape of the interior coaxial cavity of connector shell to embed polytetrafluoroethylene ladder cylinder from the shell horn mouth of input; Cooperate each other), this ladder cylinder embeds the back, and some exceeds the flange (it exceeds part and the coupler cavity consistent wall thickness that is stretched into) on the shell; And then the center coaxial aperture of inner wire embedding polytetrafluoroethylene ladder cylinder; So just form complete radio frequency connector (as shown in Figure 1), 1 is connector shell among the figure, and 2 is polytetrafluoroethylene ladder cylinder; 3 is inner wire; 4 is the flange on the shell, and 5 for exceeding the insulator cylinder of flange section, and 6 is the input horn mouth.But this structural design operation in assembling process is various, so production cost is higher.

Also there is another defective in above-mentioned N type radio frequency connector: this connector mainly adopts screw that flange 4 is fixed on the coupler cavity; Inner wire 3 stretches in the circular hole of coupler cavity wall together with polytetrafluoroethylene ladder cylinder 5; Form the coaxial dielectric chamber; Because this medium is polytetrafluoroethylene (as shown in Figure 2), and its length in whole coaxial cavity is long, so the univers parameter of coupler is made a big impact.As everyone knows, the loss that electromagnetic wave transmits in different media is different, because the dielectric constant of different medium is different, the more little electromagnetic wave loss of dielectric constant is few more, and airborne loss is minimum, because the dielectric constant of air is 1; And the dielectric constant of polytetrafluoroethylene is 2, can cause influence to a certain degree to electromagnetic transmission.By on can know that it is few from polytetrafluoroethylene back warp mistake that electromagnetic wave is avoided as far as possible, so under the prerequisite that is not influencing connector stability, the polytetrafluoroethylene in the connector is short more good more.Can be found out that by Fig. 1 the length of the polytetrafluoroethylene ladder cylinder of this type connector is long, electromagnetic wave will produce influence to a certain degree through this medium, has reduced the coupler parameter.

The utility model content

The utility model technical problem to be solved is to provide a kind of easy for installation, and the polytetrafluoroethylene in the connector does not stretch into the N type radio frequency connector of coupler cavity wall.

The technical scheme of the utility model is: the N type radio frequency connector that a kind of cavity coupler is used; Comprise the connector shell, insulator and the inner wire that have flange; Wherein said insulator is a hollow cylinder, and said inner wire is flush-mounted in the coaxial circular hole of said insulator; Said connector shell inner chamber near flange end be provided with one with the identical radial direction through hole of said insulator size, said insulator is flush-mounted in the said through hole and closely cooperates with it.

As the further improvement of such scheme, said insulator profile can adopt cylinder or regular polygon cylinder, and said insulator is processed by polytetrafluoroethylene or PP, PE, ABS plastic.

The utility model is through adopting new inner-cavity structure; So change has also taken place the assembling mode of N type radio frequency connector: current mounting means all is from the horn mouth of input insulator to be installed inwards; Change into from flange at present insulator is installed, shortened fitting depth, improved production efficiency.And the insulator after embedding and the flange outer surface of connector shell are concordant; Have only inner wire to stretch out from flange, connector has only inner wire to stretch in the coaxial circular hole of coupler cavity wall with after the coupler cavity is connected; Form the coaxial dielectric chamber, this medium is an air.Because the connector after improving has reduced the length of insulator significantly, so parameter improves a lot, the univers parameter to cavity coupler also improves a lot accordingly.

The advantage of the utility model is: 1: owing to adopt reverse assembling, so reduced production process, reduced producers, reduced production cost.2: reduced the length of insulator significantly, improved the technical indicator of coupler, reduced many interference between signals.

Description of drawings

Combine embodiment that the utility model is done further to describe with reference to the accompanying drawings.

Fig. 1 is the profile of existing N type radio frequency connector,

Fig. 2 is the scheme of installation of existing N type radio frequency connector,

Fig. 3 is the profile of the utility model,

Fig. 4 is the profile of the utility model insulator,

Fig. 5 is the profile of the utility model connector shell,

Fig. 6 is the profile of the utility model inner wire,

Fig. 7 is the scheme of installation of the utility model.

Among the figure: 1 connector shell, 2 insulators, 3 inner wires, 4 flanges, 5 exceed the insulator cylinder of flange section, and 6 is the input horn mouth, 7 radial direction through hole, 8 coaxial circular holes, 9 coupler cavity walls.

Embodiment

Referring to Fig. 3,4,5,6, the N type radio frequency connector that a kind of cavity coupler is used comprises the connector shell 1, insulator 2 and the inner wire 3 that have flange 4, and wherein insulator 2 is a hollow cylinder, and inner wire 3 is flush-mounted in the coaxial circular hole of insulator 2; Connector shell 1 inner chamber near flange end be provided with one with the identical radial direction through hole 7 of insulator 2 size, insulator 2 length are substantially equal to the length of radial direction through hole 7, insulator 2 length are can specific diameter deficient smaller or equal to 0.5mm to through hole length, the long 1mm that is no more than; Insulator 2 is flush-mounted in this through hole and closely cooperates with it.Insulator 2 profiles can adopt cylinder or regular polygon cylinder, and the material of insulator 2 can be a polytetrafluoroethylene, also can be dielectrics such as PP, PE, ABS plastic.

The concrete installation steps of this product are: embed inner wire 3 in the coaxial circular hole of insulator 2 earlier; And then insulator 2 together with inner wire 3 from embedding near the radial direction through hole of connector shell flange end 7 and closely cooperating with it; Flange 4 outer surfaces of insulator 2 after the embedding and connector shell are roughly concordant, can protrude on a small quantity, and length is no more than 1mm; Also can be recessed on a small quantity, the degree of depth is no more than 0.5mm; Have only inner wire 3 to stretch out, so just formed complete N type radio frequency connector from flange 4.

N type radio frequency connector after the improvement can adopt flange to be screwed the mode on the coupler cavity; Also can connect with the screw thread mode that spins the flange of connector with the coupler shell cavity.Connector has only inner wire 3 to stretch in the coaxial circular hole of coupler cavity wall with after the coupler cavity is connected, and forms the coaxial dielectric chamber, and this medium is air (as shown in Figure 7).Because the connector after improving has reduced the length of insulator 2 significantly, so univers parameter improves a lot, the parameter to cavity coupler also improves a lot accordingly.

As shown in Figure 5, the internal structure of connector shell 1 has been carried out design again, has reduced coaxial stepped cavity (product is simple more, and uncertain factor is just few more, and performance is just stable more).

As shown in Figure 6, inner wire 3 is the concentric round bar of stage shape metal, and the diameter of each ladder section depends on the different internal diameter media different with each section of each section in the coaxial cavity, and the stepped concentric metal inner wire after the improvement has reduced the ladder number than the inner wire of former connector.

Technique effect: through detection, about the return loss average out to 25dB of original connector, about the connector return loss average out to 30dB after the improvement, so reduced the reflection of signal; About the third order intermodulation average out to 120dBc of original connector, about the connector third order intermodulation average out to 140dBc after the improvement, many interference between signals have been reduced.

Although illustrated and described the embodiment of the utility model; For those of ordinary skill in the art; Be appreciated that under the situation of principle that does not break away from the utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, the scope of the utility model is limited accompanying claims and equivalent thereof.

Claims

1. the N type radio frequency connector that cavity coupler is used comprises the connector shell, insulator and the inner wire that have flange, and it is characterized in that: said insulator is a hollow cylinder, and said inner wire is flush-mounted in the coaxial circular hole of said insulator; Said connector shell inner chamber near flange end be provided with one with the identical radial direction through hole of said insulator size, said insulator is flush-mounted in the said through hole and closely cooperates with it.

2. the N type radio frequency connector of using according to the said a kind of cavity coupler of claim 1 is characterized in that: said insulator profile can adopt cylinder or regular polygon cylinder.

3. the N type radio frequency connector of using according to the said a kind of cavity coupler of claim 1 is characterized in that: said insulator is processed by polytetrafluoroethylene or PP, PE, ABS plastic.

4. the N type radio frequency connector of using according to the said a kind of cavity coupler of claim 1 is characterized in that: the insulator after the said embedding is roughly concordant with said flange outer surface, and protrusion length is no more than 1mm, and the recessed degree of depth is no more than 0.5mm.