CN201741784U

CN201741784U - Super flexible low-loss stable-phase radio-frequency cable

Info

Publication number: CN201741784U
Application number: CN201020259352.6U
Authority: CN
Inventors: 程欢; 陶士芳; 张晶波
Original assignee: CETC 23 Research Institute
Current assignee: CETC 23 Research Institute
Priority date: 2010-07-15
Filing date: 2010-07-15
Publication date: 2011-02-09
Anticipated expiration: 2020-07-15

Abstract

The utility model relates to the technical field of communication cables. The technical problem to be solved is to provide an ultra-flexible, low-loss, phase-stable radio frequency cable, which can meet higher and more comprehensive occasions such as microwave communication systems. The cable includes an inner conductor (1), an insulating layer (2), an outer conductor (3), and a sheath layer (6); it is characterized in that a A fastening layer (4) and a protective layer (5); the fastening layer (4) is tightly wrapped with a flexible polymer material; the protective layer (5) is a braided layer of silver-plated copper wire or a braided layer of silver-plated alloy wire. The utility model has the advantages of higher frequency of use, extremely low attenuation and voltage standing wave ratio, high phase stability, excellent shielding performance, high and low temperature resistance, electron radiation resistance, good flexibility, small size, etc., and the cable has Features such as extremely small bending radius, stable phase during bending, and stable electrical performance after thousands of times of bending.

Description

The steady phase radio frequency cable of a kind of super flexible low loss

Technical field

The utility model relates to the telecommunication cable technical field; Relate in particular to and be applied to missile brain, satellite mobile communication, radionavigation, electronics tracking and antagonism, radar communications system and high-tech areas such as various electronic measuring instrument and equipment, use as the soft feeder line of low-loss, be used for the steady phase radio frequency cable of super flexible low loss of the transmission of radiofrequency signal.

Technical background

Radio frequency cable is a kind of of signal transmssion line, and it is indispensable components and parts, particularly radio frequency coaxial-cable in various electronic systems and the instrument and equipment, and it is most widely used.

Continuous development along with science and technology, in some important use occasions such as microwave communication system, higher, more fully requirement has been proposed cable performance,, small size good, requirement such as in light weight as frequency of utilization higher (expanding to 40GHz), extremely low decay and voltage standing wave ratio, high phase stability, excellent shielding properties, high-low temperature resistant, anti-electron radiation, flexibility.Especially in particular job occasion of dynamic bending, also require cable to have characteristics such as phase stabilization in minimum bending radius, the BENDING PROCESS, crooked thousands of back electric properties be stable.

At present, the soft radio frequency coaxial-cable of low-loss is made up of inner wire, low-density polytetrafluoroethylene film lapped insulation layer, the braiding of silver-plated copper (flat) line or the wrapped outer conductor of silver-plated Copper Foil, sheath etc. usually.Such as China Patent No. is that 200820036582.9 utility model patent " the soft radio frequency cable of high strength microporous teflon insulation " discloses a kind of radio frequency cable, from the inside to the outside successively by conductor core wire, insulating barrier, outer conductor screen, wrapped raw material band protective layer and aramid fiber braiding protective layer tight compound composition.The performance of existing cable has been difficult to satisfy the instructions for use of above-mentioned workplace, particularly when satisfying higher frequency of utilization, extremely low decay and voltage standing wave ratio etc. and requiring, also to satisfy the phase stability under the minimum bending radius, crooked thousands of requirements such as back electric property stability.

The utility model content

Technical problem to be solved in the utility model provides the steady phase radio frequency cable of a kind of super flexible low loss, can overcome the deficiencies in the prior art, it is higher to satisfy instructions for uses such as microwave communication system, occasion more fully, it is higher by (0～40GHz) to have frequency of utilization, extremely low decay and voltage standing wave ratio, high phase stability, excellent shielding properties, high-low temperature resistant, anti-electron radiation, flexibility is good, advantages such as small size, and this cable has minimum bending radius, phase stabilization in the BENDING PROCESS, characteristics such as crooked thousands of back electric properties are stable are particularly useful for particular job occasion of dynamic bending.

For solving the problems of the technologies described above, technical solution of the present utility model is:

The steady phase radio frequency cable of a kind of super flexible low loss, described cable comprises inner wire 1, insulating barrier 2, outer conductor 3, restrictive coating 6; It is characterized in that: described cable also is provided with fastened layer 4 and protective layer 5 between outer conductor 3 and restrictive coating 6; Outside outer conductor 3, be provided with fastened layer 4, at fastened layer 4 peripheral hardware matcoveredns 5; Outside protective layer 5, establish restrictive coating 6 again; Described fastened layer 4 forms for adopting the flexible high molecular material hard-pressed bale; Described protective layer 5 is silver-coated copper wire braid or silver-plated alloy wire braid.

Described inner wire 1 adopts the stranded or silver-plated alloy wire of silver-coated copper wire stranded;

Described restrictive coating 6 adopts silicon rubber to extrude.

Described outer conductor 3 is silver-plated Copper Foil lapping layer.

The wrapped outer conductor of silver-plated Copper Foil that described outer conductor 3 adopts, silver-plated copper thickness is 0.03mm～0.05mm, width is 2.00mm ± 0.02mm, lay of lapping 1.0mm～1.2mm.

Described fastened layer 4 adopts PFA or FEP hard-pressed bale to extrude wall thickness 0.05mm～0.10mm.

The silver-coated copper wire of described protective layer 5 or the diameter of silver-plated alloy wire are φ 0.08mm～φ 0.10mm.

The utility model can bring following beneficial effect:

Comparing with prior art according to technique scheme has following characteristics:

The utility model makes this cable compare low-loss phase-stable phase radio frequency cable of the same type by selecting above-mentioned these materials for use, adopting the special construction of cable and processing technology, has following more outstanding characteristics:

(1) outside diameter of cable is little, in light weight, frequency of utilization is higher: described insulating barrier 2 adopts the whole teflon insulation of low-density, proportion 0.9～1.5, can reduce the decay of cable greatly, thus make the outside diameter of cable littler (＜5.0mm), weight lighter (＜6kg/100m), frequency of utilization is higher by (0～40GHz).

(2) extremely low decay and voltage standing wave ratio: described insulating barrier 2 adopts the whole teflon insulations of low-density, proportion 0.9～1.5, dielectric loss is minimum under the high frequency, the insulation uniformity is better, make cable have extremely low decay (＜3.5dB/m, 40GHz) and voltage standing wave ratio (＜1.4,0～40GHz).

(3) high phase stability: described outer conductor 3 adopts the wrapped outer conductor of silver-plated Copper Foil, add that described fastened layer 4 adopts flexible high molecular material (PFA or FEP) hard-pressed bale, make cable phase stabilization in BENDING PROCESS, has very little (crooked 180 ° of the cable of phase change under high phase stability, the high frequency, bending radius 12mm, Δ φ＜3 °, 10GHz).

(4) You Yi shielding properties: described outer conductor 3 adopts the wrapped outer conductor of silver-plated Copper Foils, adds that described protective layer 5 adopts silver-coated copper wires braiding or the braiding of silver-plated alloy wire, make cable have excellent shielding properties (＞100dB, 1GHz).

(5) crooked thousands of back electric properties are stable: described inner wire 1 adopts the stranded or silver-plated alloy wire of silver-coated copper wire stranded; Described insulating barrier 2 adopts the whole teflon insulation of low-density; Described outer conductor 3 adopts the wrapped outer conductor of silver-plated Copper Foil; Described fastened layer 4 adopts flexible high molecular material (PFA or FEP) hard-pressed bale; Described protective layer 5 adopts silver-coated copper wire braiding or the braiding of silver-plated alloy wire; adopt this special construction of cable and manufacturing process; make crooked thousands of the stable (cable ± 90 ° bendings 3000 times of back electric property of cable; bending radius 30mm; 60 times/min of speed, decay and voltage standing wave ratio change＜20%).

(6) flexibility good, have a minimum bending radius: described inner wire 1 adopts the stranded or silver-plated alloy wire of silver-coated copper wire stranded, and described restrictive coating 6 adopts silicon rubber, make the cable flexibility good, have a minimum bending radius (minimum bending radius 12mm).

(7) high-low temperature resistant: described insulating barrier 2 adopts the whole teflon insulation of low-density, described fastened layer 4 adopts flexible high molecular material (PFA or FEP) hard-pressed bale, described restrictive coating 6 adopts silicon rubber, and the material of selecting for use makes the cable can high-low temperature resistant (65 ℃～200 ℃).

(8) anti-electron radiation: described insulating barrier 2 adopts the whole teflon insulation of low-density, described fastened layer 4 adopts flexible high molecular material (PFA or FEP) hard-pressed bale, described restrictive coating 6 adopts silicon rubber, adopts these materials and the special construction of cable to make cable can resist the radiation of outer space high energy particle (anti-electron radiation 10 ⁵～10 ⁶Rad).

Description of drawings

Fig. 1 is the structural representation of a preferred embodiment of the utility model

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

The steady phase radio frequency cable of super flexible low loss as shown in Figure 1, from-inner-to-outer is made up of inner wire 1, insulating barrier 2, outer conductor 3, fastened layer 4, protective layer 5, restrictive coating 6 successively.

Inner wire 1 adopts the stranded or silver-plated alloy wire of silver-coated copper wire stranded, can be that 7,19 or more radicals are stranded, twisted wire diameter phi 1.00mm.

Insulating barrier 2 adopts the whole teflon insulation of low-density, proportion 0.9～1.5, insulation external diameter φ 2.70mm, the smooth rounding that insulate, evenly in aggregates.

Outer conductor 3 adopts the wrapped outer conductor of silver-plated Copper Foil, and silver-plated copper thickness 0.03mm～0.05mm, width are 2.00mm ± 0.02mm, lay of lapping 1.0mm～1.2mm, outer conductor external diameter φ 2.90mm.

Fastened layer 4 adopts flexible high molecular material (PFA or FEP) hard-pressed bale to extrude wall thickness 0.05mm～0.10mm, fastened layer external diameter≤φ 3.10mm.

Protective layer 5 adopts silver-coated copper wire braiding or the braiding of silver-plated alloy wire, litzendraht wire thickness φ 0.08mm～φ 0.10mm, braiding number of spindles 16 ingots, lay of braiding 1.0mm～1.2mm, braid external diameter≤φ 3.60mm.

Restrictive coating 6 adopts silicon rubber to extrude restrictive coating external diameter≤φ 5.00mm.

The utility model obtains by following technical process manufacturing:

(1) adopts the many stranded inner wire heart yearns that make of the stranded or silver-plated alloy wire of silver-coated copper wire;

(2) the whole teflon insulation manufacturing process of low-density

Adopt low-loss expanded microporous polytetra fluoroethylene-EPTEE thin-film material, adopt advanced wrapped equipment of film and accurate around-packing technology, adopt advanced agglomerating plant and accurately control sintering process, make insulation smooth rounding, evenly in aggregates, make the whole teflon insulation layer of low-density.

Or the manufacturing technology that adopts monolithic devices micropore PTFE to insulate, adopt advanced " pushing stretching sintering one step processing " technology, make the whole teflon insulation layer of low-density.

(3) adopt the wrapped equipment of accurate single head, outside insulating barrier, accurately put up wrapped silver-plated Copper Foil and make outer conductor;

(4) adopt the high temperature extrusion equipment, hard-pressed bale is extruded transparent PFA or FEP makes fastened layer;

(5) employing high-speed knitter carries out the silver-coated copper wire braiding or the braiding of silver-plated alloy wire makes protective layer;

(6) adopt processing of rubber extrusion equipment and digester (-tor) sulfuration process to make the silicone rubber jacket layer.

The performance parameter of present embodiment sees Table 1.

The performance parameter of table 1 cable

Claims

1. A super-flexible low-loss phase-stable radio frequency cable, said cable comprising inner conductor (1), insulating layer (2), outer conductor (3), sheath layer (6); it is characterized in that: said cable is outside A fastening layer (4) and a protective layer (5) are also provided between the conductor (3) and the sheath layer (6); a fastening layer (4) is provided outside the outer conductor (3), and a fastening layer (4) ) is provided with a protective layer (5); a sheath layer (6) is set outside the protective layer (5); the fastening layer (4) is formed by tightly wrapping flexible polymer materials; the protective layer ( 5) Braided layer of silver-plated copper wire or braided layer of silver-plated alloy wire.

2. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 1, characterized in that: said inner conductor (1) is twisted with silver-plated copper wire or silver-plated alloy wire.

3. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 1 or 2, characterized in that the sheath layer (6) is extruded from silicon rubber.

4. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 1 or 2, characterized in that: the outer conductor (3) is a wrapping layer of silver-plated copper foil.

5. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 3, characterized in that: said outer conductor (3) is a wrapping layer of silver-plated copper foil.

6. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 5, characterized in that: the outer conductor (3) is wrapped with silver-plated copper foil, and the thickness of the silver-plated copper foil is 0.03 mm～0.05mm, the width is 2.00mm±0.02mm, and the wrapping pitch is 1.0mm～1.2mm.

7. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 5, characterized in that: the fastening layer (4) is tightly extruded with PFA or FEP, with a wall thickness of 0.05 mm to 0.10 mm.

8. An ultra-flexible low-loss phase-stable radio frequency cable according to claim 5, characterized in that: the diameter of the silver-plated copper wire or silver-plated alloy wire of the protective layer (5) is φ0.08mm～φ0. 10mm.