CN100499287C

CN100499287C - Wideband coaxial connector

Info

Publication number: CN100499287C
Application number: CNB2005100454518A
Authority: CN
Inventors: 路波; 唐波; 张永虎
Original assignee: CETC 41 Institute
Current assignee: CETC 41 Institute
Priority date: 2005-11-28
Filing date: 2005-11-28
Publication date: 2009-06-10
Anticipated expiration: 2025-11-28
Also published as: CN1976138A

Abstract

A new type of wide-band coaxial connector consists of internal conductor, external conductor and media support. It is featured as only using one element as media support prepared from polyimide, forming said media support to be disc form and arranging a seam with length being less than diameter of disc and with one end being connected to outside along diameter on disc.

Description

A kind of wideband coaxial connector

Technical field the present invention relates to the connector of electronic equipment circuit, particularly the broadband coaxial connector.

The millimeter wave coaxial connector that background technology is released at present in the world (or claiming the broadband coaxial connector) kind is a lot, for example 1.85mm, 2.4mm, K type (2.92mm), 3.5mm, SMA type connector or the like.In these connectors, though 1.85mm connector frequency can reach more than the 50GHz, because of poor reliability fails to apply; Nonpolarity millimeter wave connector is too little because of joint dimension, makes very difficulty, also fails to be used widely; APC3.5 type connector is U.S. HP and the millimeter wave coaxial connector with excellent electrical properties released the earliest of the Amphenol company seventies in last century, obtained extensive use, but 8mm whole frequency because this connector can not be worked, and the manufacturing cost costliness, thereby limited further developing of it.The K type connector that nineteen eighty-three Wiltron company develops can use in DC-46GHz scope, has good electrical properties, and energy and widely used SMA connector compatibility, becomes one of most widely used in the world millimeter wave joint very soon.Meanwhile, Hewlett-Packard Corporation has also broken away from the restriction of traditional SMA connector, has developed the 2.4mm connector, has formed the competition situation with K type connector.But still there is weak point in external broadband coaxial connector at aspects such as heat-resisting ability, mechanical stability and electrical characteristics at present.

The development of domestic millimeter wave connector is slow relatively, and generally below 20GHz, as SMA type etc., the 2.4mm that applying frequency is higher, 1.85mm etc. are in the research and development initial stage to the applying frequency upper limit.

One of development difficult point of broadband coaxial connector is to select suitable dielectric support material, except good electrical property (relative dielectric constant and dielectric dissipation factor are stable, as far as possible little), also must consider mechanical property, thermophysical property, chemical stability, heat-resisting ability etc. to the requirement of material.Dielectric material at present commonly used has polytetrafluoroethylene (PTFE), the polystyrene that is twisted together (PE), polyphenylene oxide (PPO) etc.In the above-mentioned material, can be high temperature resistant except that polytetrafluoroethylene, the serviceability temperature of all the other materials all below 135 ℃, can not adapt to the requirement of wide temperature range; Though polytetrafluoroethylene can be high temperature resistant, but mechanical strength is low, easy deformation, in order to remedy this shortcoming, often need to increase the thickness of dielectric support, perhaps increase the quantity (two parts or are arranged more) of dielectric support, so can influence the electric property of connector again, so, select the superior dielectric support material of a kind of combination property, just can significantly improve the performance of broadband coaxial connector.

In addition, the connected mode underaction of present dielectric support and inner wire is made relatively difficulty is installed, or electric property is had harmful effect.Fig. 1 is several frequently seen connected mode schematic diagram.Fig. 1-A is that inner wire 2 and dielectric support 3 are as the single component injection mo(u)lding; Fig. 1-B is that inner wire 2 is designed to the two parts that can be threaded, and dielectric support 3 is sleeved between two parts; Fig. 1-C is that inner wire 2 and dielectric support 3 all are two parts, is glued together each other; In above-mentioned 3 kinds of modes, first kind of manufacturing process is more loaded down with trivial details, second because of inner wire discontinuous, electric property is had adverse influence, and axiality is not easy to guarantee easy damage inner wire during installation, also increased mechanical processing difficulty, the third adopts splicing, and the introducing of glue has changed the dielectric constant of material, and electric property is had harmful effect.Therefore, the structure of existing dielectric support and and inner wire between method of attachment also should improve to some extent, should make it as far as possible simple and be convenient to install under the principle of guaranteed performance.

Summary of the invention the purpose of this invention is to provide a kind of wideband coaxial connector, and the material and the structure of the dielectric support of this connector change to some extent, thereby makes it that more superior performance be arranged.

The objective of the invention is to be achieved through the following technical solutions: a kind of wideband coaxial connector, comprise inner wire, outer conductor and dielectric support, it is characterized in that dielectric support has only parts, this dielectric support use material be polyimides (english abbreviation is PI);

In the technique scheme said dielectric support be shaped as the disk shape, a length is arranged less than slit diameter, that an end is in communication with the outside along the diameter of disk.The dielectric support of this design can be installed on the continuous inner wire easily.

Select polyimides to determine that as the material of dielectric support screening process comprises many-sided performance test, comparison and test after existing and emerging macromolecular material is screened.Test comprises the performance test of material itself, and makes the bulk testing behind the coaxial connector of broadband.

The polyimide material that the present invention selects, its The performance test results is as follows:

Density (g/cm ³) 1.61

Tensile strength (MPa, 23 ℃) 117.0

Bending strength (MPa, 23 ℃) 184.0

Compressive strength (MPa, 23 ℃) 208.8

Impact strength (KJ/, 23 ℃) 50.4

Ball indentation hardness (MPa, 23 ℃) 239.0

Friction factor 0.30

Heat distortion temperature (℃, 1.86MPa) 256.2

Relative dielectric constant (23 ℃, 1MHz) 3.2

Dielectric dissipation factor (23 ℃, 1MHz) 3 * 10 ^-3

Surface resistivity (Europe, 23 ℃) 〉=10 ¹⁵

Specific insulation (Europe CM, 23 ℃) 〉=10 ¹⁶

Coefficient of linear expansion (10 ^-5/ K) 1～5

Long-term serviceability temperature (℃) 〉=220

Experimental results show that, the present invention is owing to used the polyimide material of above-mentioned performance, can make dielectric support make the very little disk of thickness, still can keep the mechanical stability of broadband coaxial connector, the volume of dielectric support reduces also to help improving the electric property of broadband coaxial connector; Its dielectric property can make the electric property of connector satisfy the delivery request of high-frequency millimeter wave, and its SC service ceiling frequency can reach 110GHz; Its thermophysical property can guarantee in very wide temperature range (200 ℃ to 200 ℃), and especially in high temperature (at 200 ℃) continuous operation down, and the serviceability temperature that present external product provides is up to 165 ℃.These characteristics makes wideband coaxial connector have the performance of the prior art of being superior to,

The slit of said disk shape dielectric support can obtain with mechanical incision method in the technique scheme, stays a cut-off parts not during incision, and gap length is not less than 8/10 of diameter, and the not cut-off parts width that stays is not more than 2/10 of diameter.

The advantage of wideband coaxial connector is: one, because the material of selecting for use has good comprehensive mechanical performance, the size of dielectric support can be done very for a short time, helps the improvement of electric property; Two, because inner wire is continuous, help the convenience of the improvement and the installation of electric property, the non-coaxality when also having avoided discontinuous inner wire to install, and the damage of contingent inner wire; Three, have thermal stability (comprising dimensional stability, ingredient stability and little thermal coefficient of expansion), can under higher temperature, use continuously, thus applicable powerful operational environment.Four, higher SC service ceiling frequency is arranged.

Description of drawings Fig. 1 (comprising Figure 1A, Figure 1B, Fig. 1 C) is several annexation schematic diagrames of inner wire and dielectric support in the coaxial connector of existing broadband.

Fig. 2, Fig. 4, Fig. 5 are the dielectric support structure schematic diagrames of several embodiment of the present invention.Wherein Fig. 2-A, Fig. 4-A, Fig. 5-A are profiles, and Fig. 2-B, Fig. 4-B, Fig. 5-B are front views, and Fig. 2-C, Fig. 4-C, Fig. 5-C install pre-structure state variation schematic diagram.

Fig. 3 is the structural representation after dielectric support among the present invention and inner wire and part outer conductor install, and wherein Fig. 3-A is a profile, and Fig. 3-B is a front view.

Fig. 6 is the overall structure schematic diagram (profile) that the present invention is used for the jack to jack adapter connector.

Fig. 7 is the overall structure schematic diagram (profile) that the present invention is used for two male connectors.

The invention will be further described below in conjunction with drawings and Examples for embodiment.

Its overall structure of the said wideband coaxial connector of the present invention as shown in Figure 6 and Figure 7, comprise outer conductor 1, inner wire 2 and dielectric support 3, Fig. 6 is as the jack to jack adapter connector, have only this 3 parts, Fig. 7 except these 3 parts, also is useful on the parts such as swivel nut of connection as two male connectors, these are all identical with prior art, no longer are illustrated.

The difference of said wideband coaxial connector of the present invention and prior art is, dielectric support 3 has been selected polyimide material for use, it is reduced to only needs a disk, can finish the function of dielectric support, and disk has very little thickness, for example, thickness can be 0.5mm in the coaxial connector of the broadband of 1mm, and thickness can be 1mm in the coaxial connector of the broadband of 1.85mm.

The structure of 3 of said dielectric support embodiment such as Fig. 2, Fig. 4 and shown in Figure 5 among the present invention.Wherein Fig. 2-A, Fig. 4-A, Fig. 5-A are profiles, and Fig. 2-B, Fig. 4-B, Fig. 5-B are front views, and Fig. 2-C, Fig. 4-C, Fig. 5-C install pre-structure state variation schematic diagram.

Above-mentioned 3 embodiment are the disk shape, there is the circular hole that inner wire can be installed at the center, dielectric support 3 has a length less than slit 4 diameter, that an end is in communication with the outside along diametric(al), slit 4 makes this disk be divided into two parts, the part of not cutting off by the slit between two parts 5 links together, this not the width of cut-off parts 5 be not more than 2/10 of disk diameter.Among the embodiment shown in Figure 2, there is concave station the both sides of disk, and among the embodiment shown in Figure 4, there is boss the both sides of disk, among the embodiment shown in Figure 5, and the circular hole that there is concave station the both sides of disk and runs through.

Fig. 2, Fig. 3 be the installation and application of dielectric support 3 as can be seen, and the configuration state in the installation process changes.Because the variable-width in slit 4, dielectric support 3 after width becomes greatly is easy to be loaded into the stepped portions of continuous inner wire, then former state is recovered in slit 4 again, in the part of packing into the outer conductor, Fig. 3-C and Fig. 4 are the structural representations of finishing after the installation, therefrom can see, because dielectric support 3 has the coupling part 5 that does not cut off, dielectric support after the installation can be recovered original state fully, with inner and outer conductor combining of accurately putting in place is arranged.

The polyimides that embodiment uses can be the product of the model of Shanghai synthetic resin research institute as YS-20.

Claims

1, a kind of wideband coaxial connector comprises inner wire, outer conductor and dielectric support, it is characterized in that dielectric support has only parts, this dielectric support use material be polyimides.

2, wideband coaxial connector according to claim 1, what it is characterized in that said dielectric support is shaped as the disk shape, a length is arranged less than slit diameter, that an end is in communication with the outside along the diameter of disk.