CN205810409U - Aerospace high-power RF co-axial cable component - Google Patents

Abstract

A kind of aerospace high-power RF co-axial cable component, including cable and two contact pin radio frequency connectors, is connected by cable between two contact pin radio frequency connectors；The insulating medium layer of cable, screen layer and oversheath are wrapped in heart yearn outer circumferential successively, and the both ends of insulating medium layer are stretched out outside the end face of screen layer and oversheath, and the both ends of heart yearn are stretched out outside the end face of insulating medium layer；Being provided with insulating barrier and outer conductor outside the inner wire of contact pin radio frequency connector, inner wire one end stretches out outside the end face of insulating barrier, and inner wire other end has installing hole, the annular groove of insulating barrier correspondence cable insulation dielectric layer both side ends profile；Cable insulation dielectric layer inserts in the insulating barrier of contact pin radio frequency connector, even if the dielectric of cable and adapter bounces back, produce vacuum gap, but it is the most relative to be not through vacuum gap between inner and outer conductor diametrically, not only effectively increase creep age distance, it is also possible to stop micro discharge phenomenon to occur.

Description

Aerospace high-power RF co-axial cable component

Technical field

This utility model relates to a kind of aerospace high-power RF co-axial cable component.

Background technology

In microwave system, radio frequency co-axial cable subassembly is a kind of requisite element, and wide in variety, purposes is wide, extensively It is applied to include multiple fields such as airborne, Aeronautics and Astronautics.And in space industry, harsh environment makes complete machine to cable group The requirement of part is the most complicated various, and therefore, the design of product needs comprehensively to analyze, steady to ensure its function admirable, quality Fixed reliable, meet the use requirement of system equipment under the conditions of complete machine.This product has low-voltage standing-wave ratio, low-loss, power concurrently The features such as capacity is big, environmental suitability is strong, can also use in Other Engineering.

The dielectric of cable and adapter is when being changed by high/low temperature, and medium can form certain rebound phenomenon, The end face of dielectric contact will form a vacuum gap, and vacuum gap makes inner wire form micro discharge phenomenon with outer conductor or make Electrical breakdown is become to occur.And cable assembly is when transmitting high-power RF signal, energy loss is mainly produced by inner wire loss, Therefore heat is concentrated mainly on inner wire.When using air dielectric structure, the heat on inner wire cannot be straight by conduction of heat Connecing and be transferred on shell, radiating effect is undesirable.Especially under the vacuum state of aerospace environment, thermal radiation effect has dropped Low.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of big merit of aerospace rational in infrastructure, that safety coefficient is high Rate radio frequency co-axial cable subassembly.

For solving above-mentioned technical problem, this utility model provides a kind of aerospace high-power RF co-axial cable component, Including cable and two contact pin radio frequency connectors, connected by cable between two contact pin radio frequency connectors；

Cable includes heart yearn, insulating medium layer, screen layer and oversheath, and insulating medium layer, screen layer and oversheath are successively Being wrapped in heart yearn outer circumferential, the both side ends of insulating medium layer stretches out the end of screen layer and oversheath along the axial direction of cable Outside face, the both side ends of heart yearn is stretched out outside the end face of insulating medium layer along the axial direction of cable；

Contact pin radio frequency connector at least includes that inner wire, outer conductor, insulating barrier, inner wire outer circumferential are sequentially provided with insulation Layer and outer conductor, a side end of inner wire stretches out outside the end face of outer conductor and insulating barrier along its axial direction, and inner wire is another One side end face has the installing hole agreeing with cable core both side ends profile, insulating barrier correspondence cable insulation dielectric layer both side ends The annular groove of profile；

During assembling, being connected between outer conductor and the screen layer of cable of contact pin radio frequency connector, the insulation of cable both sides is situated between Matter layer end is respectively protruding in the annular groove of two contact pin radio frequency connector insulating medium layers, and the heart yearn end of cable both sides is stretched respectively In entering the installing hole of two contact pin radio frequency connector inner wires and heart yearn contacts with inner wire.

After using such structure, cable insulation dielectric layer inserts in the insulating barrier of contact pin radio frequency connector, even if cable Bounce back with the dielectric of adapter, produce vacuum gap, but it is straight to be not through vacuum gap between inner and outer conductor diametrically Connect relatively, not only effectively increase certain creep age distance, it is also possible to stop micro discharge phenomenon to occur.

For clearer understanding technology contents of the present utility model, below this aerospace is used high-power RF coaxial cable Assembly is referred to as this assembly.

The contact pin radio frequency connector of this assembly also includes adapter sleeve, and adapter sleeve is sleeved on outside outer conductor, and adapter sleeve is along interior Conductor axial direction stretches out outside the end face of outer conductor, has gap between adapter sleeve and inner wire；After using such structure, even Female connector can play the effect being connected location with external socket radio frequency connector.

Weld between outer conductor and the screen layer of cable of this assembly contact pin radio frequency connector；After using such structure, The reliability being connected between outer conductor with cable shield can be improved.

The inner wire of this assembly contact pin radio frequency connector selects beryllium-bronze material；After using such structure, beryllium-bronze material Certain elasticity, hardness and resistance to elevated temperatures is made it have through admittedly molten, closing in, Ageing Treatment after material machine-shaping.

Cable core end contacts connection with contact pin radio frequency connector inner wire, compares normal welding and connects, and can protect In the case of the two conducting of card, the resistance to elevated temperatures of improving product, thus promote its mean power tolerance performance.

The insulating barrier of this assembly contact pin radio frequency connector selects polytetrafluoroethylmaterial material；After using such structure, poly-four The use temperature of fluorothene can reach 200 DEG C, it is ensured that thermostability when this assembly uses.

Accompanying drawing explanation

Fig. 1 is the structural representation of this Assemblies Example.

Fig. 2 is one of structural representation of this Assemblies Example contact pin radio frequency connector.

Fig. 3 is the two of the structural representation of this Assemblies Example contact pin radio frequency connector.

Fig. 4 is the phantom of this Assemblies Example contact pin radio frequency connector.

Fig. 5 is this Assemblies Example contact pin radio frequency connector and phantom during cable assembling.

Fig. 6 is the use state diagram of Fig. 5.

Detailed description of the invention

As shown in Fig. 1 to 5 adapter sleeve 24 of contact pin radio frequency connector 2 (Fig. 3 eliminate)

This assembly includes cable 1 and two contact pin radio frequency connectors 2.

Cable 1 includes heart yearn 11, insulating medium layer 12, screen layer 13 and oversheath 14, insulating medium layer 12, screen layer 13 Being wrapped in heart yearn 11 outer circumferential successively with oversheath 14, the both side ends of insulating medium layer 12 is stretched along the axial direction of cable 1 Going out outside the end face of screen layer 13 and oversheath 14, the both side ends of heart yearn 11 stretches out dielectric along the axial direction of cable 1 Outside the end face of layer 12.

Contact pin radio frequency connector 2 includes inner wire 21, outer conductor 23, insulating barrier 22 and adapter sleeve 24, and inner wire 21 selects Beryllium-bronze material, inner wire 21 outer circumferential is sequentially provided with insulating barrier 22 and outer conductor 23, and a side end of inner wire 21 is along it Axial direction stretches out outside the end face of insulating barrier 22, and inner wire 21 opposite side end face has and agrees with cable 1 heart yearn 11 both side ends The installing hole 21a of profile, installing hole 21a have certain closing in, facilitate installing hole 21a and heart yearn 11 end to realize closely and insert Connecing cooperation, the annular groove 22a of the corresponding cable 1 insulating medium layer 12 both side ends profile of insulating barrier 22, insulating barrier 22 external diameter is more than electricity Insulating medium layer 12 external diameter of cable 1, insulating barrier 22 selects polytetrafluoroethylmaterial material；

Contact pin radio frequency connector 2 uses interstitital texture, is tight fit, does not exists between insulating barrier 22 and inner and outer conductor 23 Vacuum gap (chamber).

Adapter sleeve 24 is sleeved on outside outer conductor 23 by threaded engagement, and adapter sleeve 24 stretches out along inner wire 21 axial direction Outside the end face of outer conductor 23, adapter sleeve 24 is wrapped in outside inner wire 21, but has between adapter sleeve 24 and inner wire 21 end Gap, the length that adapter sleeve 24 stretches out outside outer conductor 23 end face stretches out the length outside insulating barrier 22 end face not less than inner wire 21 (in the present embodiment, outer conductor is outside inner wire circumferential position, and outer conductor and inner wire are misaligned in the plane projection of axis place, The position of inner wire is fixed by adapter sleeve and insulating medium layer, but this feature is just for the applying working condition setting of this assembly, And this restriction technologies feature must be used, if it is also permissible that outer conductor overlaps in the plane projection of axis place with inner wire , i.e. inner wire outer circumferential is enclosed with insulating barrier and outer conductor successively).

During assembling, the outer conductor 23 of contact pin radio frequency connector 2 welds with the screen layer 13 of cable 1, and used solder is equal For high-temperature material, insulating medium layer 12 end of cable 1 both sides is respectively protruding into the ring of two contact pin radio frequency connector 2 insulating barriers 22 In groove 22a, heart yearn 11 end of cable 1 both sides is respectively protruding into the installing hole 21a of two contact pin radio frequency connector 2 inner wires 21 In, and heart yearn 11 contacts conducting with inner wire 21.

Different from the neat end face of conventional products excision cable 1 medium, this product is when cable 1 wire stripping and during end face refine, Use a kind of wire stripping form special, that retain medium.During assembling, cable 1 insulating medium layer 12 inserts contact pin radio frequency connector 2 Insulating barrier 22 in.

As shown in Figure 6

Dielectric at this cable 1 and adapter bounces back, and produces vacuum gap 3, but in footpath between inner and outer conductor 23 Upwards it is not through vacuum gap 3 the most relatively, not only effectively increases certain creep age distance, it is also possible to stop micro discharge phenomenon Occur.

It addition, 1, this assembly cut-off frequency require meet " GJB5246-2004 radio frequency connector interface " cut-off frequency be by The outside dimension of outer conductor, inner wire and insulating barrier determines, can be calculated relative dimensions by following formula:

$f_C=\frac{C_0}{{\mathrm{\λ}}_c}\≈\frac{2C_0}{\sqrt{{\mathrm{\ϵ}}_r}\mathrm{\π}(D+d)}\≈\frac{190.85}{\sqrt{{\mathrm{\ϵ}}_r}(D+d)}---\left(1\right)$

Wherein, C0 ≈ 300000km/s；

λ c----wavelength, mm；

D------inner wire diameter, mm；

D------outer conductor internal diameter, mm；

The dielectric constant of ε r----insulant.

D=2.8mm, D=9.1mm, ε r=2.1 carries out Theoretical Calculation.

Through Theoretical Calculation, fc=7.63GHz, technical requirement 6GHz can be met.

2, this assembly needs to meet low standing wave, low-loss performance requirement

Voltage standing wave ratio is an important indicator of examination radio frequency co-axial cable subassembly performance, and its reflection is transmission channel On return loss, namely transmission energy loss in transmitting procedure, in HIGH-POWERED MICROWAVES components and parts, will directly affect The power capacity of product, therefore, it is necessary to calculate the most accurately, emulate and obtain optimal structural design.

First, the coupling of impedance is realized as far as possible with continuous.When design, impedance discontinuity point should be reduced as far as possible, right In some structures, inevitable impedance discontinuity point, should use rational method to improve.

Secondly, utilize empirical equation, interiors of products impedance discontinuity part is calculated, determines the chi of compensator section Very little.

Finally, by software, calculated structure is carried out Microwave simulation, result of calculation is optimized.

AnsoftHFSS software emulation step:

1) model is set up: the setting of material, the setting of port；

2) setting of parameter and optimization；

3) conversion of model: be used in the middle of the design of product, according to production technology ability by optimizing calculated data Inner and outer conductor is rationally split by situation, and considers to regulate surplus, obtains final design result.

The adapter designed by simulation optimization designing technique and reality can produce a certain distance, it is necessary to tested by test Demonstrate,prove, utilize time-domain analysis Optimization Design Method further to be optimized.

The advantage of this assembly is:

1, low standing wave, low-loss structure-design technique: the operating frequency range of this product is 0.05GHz～6GHz, voltage Standing wave≤1.25.The use environment of this Project Product is aerospace environment, there are the special circumstances such as vacuum, irradiation, variations in temperature be big, The impact on power capacity of the various environmental factors should be considered.

2, power capacity thermal design technology: this product power capacity 165W@2GHz, ambient temperature+85 DEG C, vacuum is better than 10^-3Pa), by calculating, simulation optimization electrical property, innovating structure design, the thermal design making product is more reasonable.

3, all dielectric interstitital texture design: designed by all dielectric interstitital texture, effectively suppresses the generation of vacuum micro discharge.

Above-described is only a kind of embodiment of the present utility model, it is noted that for the ordinary skill of this area For personnel, on the premise of without departing from this utility model principle, it is also possible to make some modification and improvement, these also should be regarded as Belong to protection domain of the present utility model.

Claims (5)

1. an aerospace high-power RF co-axial cable component, including cable and two contact pin radio frequency connectors, two contact pins Connected by cable between radio frequency connector；

It is characterized by:

Cable includes that heart yearn, insulating medium layer, screen layer and oversheath, insulating medium layer, screen layer and oversheath wrap up successively In heart yearn outer circumferential, the both side ends of insulating medium layer is stretched out along the axial direction of cable outside the end face of screen layer and oversheath Side, the both side ends of heart yearn is stretched out outside the end face of insulating medium layer along the axial direction of cable；

Contact pin radio frequency connector at least include inner wire, outer conductor, insulating barrier, inner wire outer circumferential be sequentially provided with insulating barrier and Outer conductor, a side end of inner wire stretches out outside the end face of outer conductor and insulating barrier along its axial direction, inner wire opposite side End face has the installing hole agreeing with cable core both side ends profile, insulating barrier correspondence cable insulation dielectric layer both side ends profile Annular groove；

During assembling, it is connected between outer conductor and the screen layer of cable of contact pin radio frequency connector, the insulating medium layer of cable both sides End is respectively protruding in the annular groove of two contact pin radio frequency connector insulating medium layers, and the heart yearn end of cable both sides is respectively protruding into two The installing hole of individual contact pin radio frequency connector inner wire is interior and heart yearn contacts with inner wire.

Aerospace high-power RF co-axial cable component the most according to claim 1, is characterized in that:

Described contact pin radio frequency connector also includes adapter sleeve, and adapter sleeve is sleeved on outside outer conductor, and adapter sleeve is along inner wire axle Stretch out to direction outside the end face of outer conductor, between adapter sleeve and inner wire, have gap.

Aerospace high-power RF co-axial cable component the most according to claim 1, is characterized in that:

Weld between outer conductor and the screen layer of cable of described contact pin radio frequency connector.

Aerospace high-power RF co-axial cable component the most according to claim 1, is characterized in that:

The inner wire of described contact pin radio frequency connector selects beryllium-bronze material.

Aerospace high-power RF co-axial cable component the most according to claim 1, is characterized in that:

The insulating barrier of described contact pin radio frequency connector selects polytetrafluoroethylmaterial material.