CN203503812U - Phase Stable Coaxial Test Cables - Google Patents

Abstract

The utility model relates to a coaxial test wire is extremely stabilized to phase place, it mainly includes the rigid cable conductor of at least one section scalable adjustment length and relies on and one end group establishes rotatable joint between them, makes coaxial test wire except can be according to the required length of required adjustment, also can remove and the purpose of automatic switch direction along with determinand and tester to have the extremely stable characteristic of phase place, in order to reach the measurement numerical value accuracy.

Description

Phase Stable Coaxial Test Cables

technical field

The utility model relates to a coaxial test wire with extremely stable phase, which comprises at least one stretchable and adjustable length steel cable and rotatable joints at both ends thereof, which can automatically switch directions as the object to be tested and the tester move. Purpose, and has the characteristics of extremely stable phase, in order to achieve accurate measurement values.

Background technique

Coaxial cables and high-frequency connectors play an important role in electronic circuits, connecting many different functional modules, subsystems, systems, or connecting test equipment. Simply put, they provide transmission paths to transmit high-frequency analog signals or For high-speed digital signals, the quality of the transmission path depends on many factors, including: materials, design, and assembly methods.

The importance of high-frequency coaxial cables in a system is usually ignored unless it causes signal transmission failure. Using good high-frequency coaxial cables has less loss or signal distortion, but when using poor-quality coaxial cables For high-frequency coaxial cables, the signal attenuation caused by line loss must be compensated by a broadband amplifier, but signal distortion is sometimes irreparable. High-frequency coaxial cables and adapters are part of the system in the test system. Therefore, it must have excellent characteristics, which include: low loss, good standing wave ratio, high phase stability and high isolation. If it is used in the test of high-speed digital applications, it must have high-precision phase matching characteristics .

In the environment where information transmission is booming, high-speed, radio-frequency and microwave signal transmission needs to have high transmission quality. Generally speaking, high-speed digital signals are mostly transmitted by differential signals, so the two cables for transmitting signals need to have polarity. High-precision phase matching, in other words, the phase error of the signals transmitted by the two cables must be within a certain range, so each set of cables must have a certain electrical length (ELECTRICAL LENGTH) according to the required specifications , in the application of cable assemblies that require phase matching, ideally, each cable must have the same or similar electrical length as other cables. The electrical length is usually described by "phase delay", that is, two signals pass through the cable The resulting time difference also causes a phase difference. Therefore, to achieve the above-mentioned standard requires a very rigorous manufacturing process, which also results in an increase in cost.

At present, when testing coaxial cables in the industry, most of them use flexible coaxial test wires. However, because the inner conductor material is soft, it will produce phase changes when it bends. Therefore, the existing flexible coaxial test wires It is not easy to maintain phase stability, which makes the test value incorrect.

Contents of the invention

The utility model relies on at least one stretchable and adjustable length steel cable and sets a rotatable joint between them and at one end, so that the coaxial test wire can not only adjust the required length according to the requirements, but also can be used with the object to be tested. And the purpose of automatically changing the direction of the tester when it moves, and has the characteristics of extremely stable phase to achieve accurate measurement values.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A coaxial test wire with extremely stable phase is characterized in that it mainly includes at least one section of steel cable with telescopic function and adjustable length, and between each steel cable or at one end of one of the steel cables. A rotatable joint is assembled, so that the formed coaxial test wire can automatically change direction as the object under test and the tester move.

In a preferred technical solution, the following technical features can also be added:

The flexible and length-adjustable rigid cable mainly includes an outer cable tube, an inner cable tube, a connecting core rod and a connecting core column. One end of the inner cable tube is threaded into the outer cable tube, The middle section and the end port are respectively set with a supporting ring and a supporting piece, and the supporting piece is formed with an extension pipe extending into the inner hole of the inner cable tube, and a clasp is set on the supporting piece, so that the supporting piece follows the outer The cable tubes move synchronously and keep the contact uninterrupted. The end of the outer cable tube is assembled with the third shell of a second rotatable joint. The second rotatable joint includes the third shell, the connecting piece and In the fourth casing, an insulator is assembled in the coaxial hole of the third casing and the support member, and a connecting stem is pierced in the inner hole of the insulator, and one end of the connecting stem is locked with the vertical part of the third casing. The upper end of the second middle section of the connecting piece set in the insulator is vertically socketed, and the lower end of the second middle section of the core piece has a connecting core head that is restored by a spring. The connecting piece and a set of connecting holes have bearings and bearings. The fourth shell of the sleeve is locked and connected, and the aforementioned connecting core head is socketed with the connecting hole groove of the second rotating core in the fourth shell, and the outer end of the aforementioned inner cable tube is locked with a first joint part, and a connecting core rod is assembled on the first joint part by means of an insulator. The inner end of the connecting core rod is formed with an extension tube extending inwardly with a long hole, and the other end sleeve of the aforementioned connecting core rod enters the In the long hole of the connecting core rod, and when the inner and outer cable tubes are stretched, the other end of the connecting core post slides in the long hole of the connecting core rod, and the connecting core post and the connecting core rod are kept in contact without interruption .

There is a locking ring at the front end of the outer cable tube, and a top ring with a beveled ring at the inner end is arranged inside the locking ring. When the locking ring is turned outward, the top ring The inclined ring surface of the outer cable tube leaves the inclined end surface of the outer cable tube end, so that the top beam ring is loosened. At this time, the inner and outer cable tubes are stretched or shortened, and when the length is adjusted to the required length, the locking The ring is rotated inwards, so that the inclined ring surface of the top-drawing ring is pressed against the inclined end surface of the outer cable pipe end, so that the top-drawing ring is tightened, and the inner and outer cable pipes are positioned.

The first joint piece at the outer end of the inner cable tube is combined with the first shell of a first rotatable joint, so that the connecting core at the outer end of the connecting core rod subjected to the spring recovery force can be connected with the first rotatable joint. The first housing of the rotary joint is fitted with a connecting hole slot of the first rotating core in the bearing assembly hole, and the first rotating core is fixed in the first housing by means of a rotating insulator, and is connected to the The second shell is connected with the first middle core piece in the connector between the first shells, and then forms a connected state with the end core piece in the second shell, and the X-axis and Y axis are generated by the first rotatable joint. shaft rotation.

On the side of the fourth housing of the second rotatable joint, the locking hole locks a second joint piece to connect another second steel cable that can be stretched and adjusted in length. The second steel cable mainly includes a The second outer cable tube, the second inner cable tube, the second connecting core rod and the second connecting core column, one end of the second inner cable tube is assembled in the second outer cable tube, and the second inner cable The middle section of the pipe and the end port are respectively set with a second support ring and a second support member, and the second support member forms an extension pipe portion extending into the inner hole of the second inner cable tube, so that the second support member follows the second The outer cable tube moves synchronously and keeps the contact uninterrupted. The end of the second outer cable tube of the second steel cable is locked with a locking cap to form a third connector, and one end of the second connecting stem is passed through. Set the insulator fixed in the third joint part and the coaxial hole of the second support part at the end of the second inner cable tube, and one end of the second connecting core rod passes through the insulator assembled in the second joint part, and the same , the other end of the second connecting stem is threaded into the long hole of the second connecting stem, and then when the second inner and outer cable tubes are stretched, the other end of the second connecting stem is connected to the second connecting core Sliding in the long hole of the rod, and keeping the second connecting stem in contact with the second connecting stem without interruption, and relying on the second rotatable joint, the two steel cables can be rotated relative to each other.

There is a second locking ring at the front end of the second outer cable tube, and a second top ring with a beveled ring surface at the inner end is arranged in the second locking ring. When the second locking The tightening ring is rotated outward so that the inclined ring surface of the second top-drawing ring is separated from the inclined end surface of the second outer cable pipe end, so that the second top-drawing ring is loosened, and the second inner and outer cables are stretched at this time The tube is elongated or shortened, and when it is adjusted to the required length, the second locking ring is turned inward, so that the inclined ring surface of the second top beam ring is pressed against the inclined end surface of the second outer cable tube end , so that the second top beam ring is tightened, so that the second inner and outer cable tubes can be positioned.

Use only one steel cable wire and lock the swivel joint on one or both ends.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

The utility model utilizes at least one stretchable and length-adjustable rigid cable, so that the coaxial test wire can be adjusted in length as required, and has the characteristic of extremely stable phase.

The utility model relies on the rotatable joints between each steel cable and one end, so that the direction of the coaxial test wire can be automatically changed with the movement of the object to be tested and the tester.

Description of drawings

Fig. 1 is an exploded view of an embodiment in which one of the utility models is assembled with more than one steel cable wire;

Fig. 2 is a combined sectional view of the structure shown in Fig. 1;

Fig. 3 is the cross-sectional view of the steel cable of the present invention when it is not stretched;

Fig. 4 is the cross-sectional diagram when the steel cable of the utility model is elongated;

Fig. 5 is a perspective view of an embodiment of the rotatable function of the utility model;

Fig. 6 is a perspective view that one end of the utility model is connected to the tester and the other end can be connected to the object to be tested;

Fig. 7 is a cross-sectional view of an embodiment of the utility model when only a single steel cable is used.

Explanation of reference signs: 1-steel cable; 11-outer cable tube; 111-inclined end face; 112-locking ring; 113-top beam ring; 1131-inclined ring; 114-support; 1142, 1234, 233, 271, 32-insulator; 1143-clasp; 115-connecting stem; 12-inner cable tube; 121-supporting ring; 122-first connector; 123-connection Core rod; 1231-long hole; 1232, 231-spring; 1233, 232-connecting core head; 2-second rotatable joint; 21-third shell; 22, 43-connector; 23-second middle core 24-the fourth shell; 25-the second rotating core; 251,422-connecting hole groove; 26,424-bearing; 261-bearing sleeve; 27-the second joint; 3-the third joint; 31-locking cap; 4-first rotatable joint; 41-second housing; 411-end core; 42-first housing; 421-first rotating core; 423-rotating insulation; Tester; 431-first mid-section core piece; 1A-second steel cable; 11A-second outer cable tube; 111A-beveled end face; 112A-second locking ring; 1131A-inclined annulus; 114A-second support; 1141A-extended pipe; 115A-second connection stem; 12A-second inner cable tube; 121A-second support ring; 123A-second connection Mandrel; 1231A-long hole.

Detailed ways

Please refer to Fig. 1 and Fig. 2, the utility model relates to a coaxial test wire with extremely stable phase, which includes at least one section of steel cable 1 that can be stretched and adjusted in length and second rotatable joints 2 at both ends. And the first rotatable joint 4 can automatically change the direction with the movement of the object under test and the tester, and has the characteristics of extremely stable phase to achieve accurate measurement values.

Wherein the flexible and length-adjustable rigid cable 1 mainly includes an outer cable tube 11, an inner cable tube 12, a connecting core rod 123 and a connecting core post 115, and one end of the inner cable tube 12 is threaded on the outer cable In the pipe 11, a support ring 121 and a support member 114 are respectively set at the middle section and the end port of the inner cable pipe 12. The support member 114 forms an extension pipe portion 1141 extending into the inner hole of the inner cable pipe 12, And a clasp 1143 is set on the support member 114, so that the support member 114 moves synchronously with the outer cable tube 11, and keeps the contact uninterrupted. At the end of the outer cable tube 11, it is connected with a second rotatable The third shell 21 of the joint 2 is assembled together, and the second rotatable joint 2 includes the third shell 21, the connecting piece 22 and the fourth shell 24, and the coaxial hole of the third shell 21 and the supporting piece 114 Inside, an insulator 1142 is set, and a connecting stem 115 is perforated in the inner hole of the insulator 1142, and one end of the connecting stem 115 is set in the insulator 233 with the connecting piece 22 locked with the vertical part of the third housing 21 The upper end of the second middle core part 23 is vertically socketed, and the lower end of the second middle core part 23 has a connecting core head 232 which is restored by a spring 231, and the connecting part 22 and a group of connection holes have bearings 26 and bearing The fourth shell 24 of the sleeve 261 is locked, and the aforementioned connecting core 232 is socketed with the connecting hole 251 of the second rotating core 25 in the fourth shell 24, and the outer surface of the aforementioned inner cable tube 12 There is a first connector 122 in the end lock assembly, and a connecting core rod 123 is assembled on the first connector 122 by means of an insulator 1234. The inner end of the connecting core rod 123 is formed with an extension extending inwardly with a long hole 1231. The tube part 1141, the other end of the aforementioned connecting stem 115 is set into the long hole 1231 of the connecting stem 123, and when the inner and outer cable tubes 12, 11 are stretched, the other end of the connecting stem 115 is in the Slip inside the long hole 1231 of the connecting core rod 123, and keep the connecting core rod 115 in contact with the connecting core rod 123. As shown in FIG. And a top beam ring 113 with a slanted ring surface 1131 at the inner end is arranged in it. When the locking ring 112 is rotated outward, the slant ring 1131 of the top beam ring 113 is separated from the slant at the end of the outer cable tube 11. end face 111, so that the top beam ring 113 is loosened, and the inner and outer cable tubes 12, 11 can be stretched or shortened at this time, and when adjusted to the required length, the locking ring 112 is inwardly Rotate to make the inclined ring surface 1131 of the top beam ring 113 tight against the inclined end surface 111 at the end of the outer cable tube 11, so that the top beam ring 113 is tightened, so that the inner and outer cable tubes 12 and 11 are positioned As shown in Figure 3, the first connector 122 at the outer end of the inner cable tube 12 is combined with the first housing 42 of a first rotatable joint 4, so that the outer end of the connecting core rod 123 The connecting core head 1233 partly subjected to the restoring force of the spring 1232 can be provided with the first housing 42 of the first rotatable joint 4. The connection hole 422 of the first rotating core 421 in the assembly hole of the bearing 424 is socketed, and the first rotating core 421 is fixed in the first housing 42 by means of a rotating insulator 423, and is located in the The second shell 41 is connected to the first middle core piece 431 in the connecting piece 43 between the first shells 42 , and then forms a connected state with the end core piece 411 in the second shell 41 .

On the side of the fourth housing 24 of the aforementioned second rotatable joint 2, another second joint piece 27 is locked to connect another second steel cable 1A. The same as the steel cable 1, the second steel cable 1A that can be stretched and adjusted in length mainly includes a second outer cable tube 11A, a second inner cable tube 12A, a second connecting core rod 123A and a second connecting core Column 115A, one end of the second inner cable tube 12A is assembled in the second outer cable tube 11A, and a second support ring 121A and a second support ring 121A are respectively set in the middle section and the end port of the second inner cable tube 12A. 114A, the second supporting member 114A is formed with an extension pipe portion 1141A that extends into the inner hole of the second inner cable tube 12A, so that the second supporting member 114A moves synchronously with the second outer cable tube 11A, and keeps The contact is not interrupted, and the second connector 27 is combined with the outer end of the second inner cable tube 12A of the second steel cable 1A, at the end of the second outer cable tube 11A of the second steel cable 1A, Then use the locking cap 31 to lock and assemble a third joint part 3, and one end of the second connecting stem 115A passes through the insulator 32 fixed in the coaxial hole of the third joint part 3 and the second support part 114A, and One end of the second connecting rod 123A is threaded through the insulator 271 in the second joint member 27. Similarly, the other end of the second connecting rod 115A is threaded into the long hole 1231A of the second connecting rod 123A. , and then when the second inner and outer cable tubes 12A, 11A are stretched, the other end of the second connecting stem 115A is slid in the long hole 1231A of the second connecting stem 123A, and the second connecting stem 115A is connected to the second connecting stem 115A. The second connecting mandrel 123A keeps the contact uninterrupted. With the help of the first rotatable joint 4, the rotation of the X-axis and the Y-axis is generated, and cooperates with the first rotatable joint 4 to make the two rigid cables 1 and the second rigid cable Line 1A can be rotated relative to each other to form a double-section steel cable 1 with adjustable length, as shown in Figure 5, except that the two steel cables 1 and the second steel cable 1A can be adjusted as required In addition to the length, it can also rotate with the movement of the object under test and the tester 5, and there will be no phase change due to movement or rotation. Even if the phase change is only within 1 degree, as shown in Figure 6 Show.

At the front end of the second outer cable tube 11A, there is a second locking ring 112A in the lock group, and a second top ring 113A with an inclined ring surface 1131A at the inner end is arranged in it, when the second locking ring is locked The ring part 112A rotates outwards to make the inclined ring surface 1131A of the second top beam ring part 113A leave the inclined end surface 111A of the second outer cable tube 11A end, so that the second top beam ring part 113A is loosened, and the second top beam ring part 113A can be stretched at this time. The two inner and outer cable tubes 12A and 11A are elongated or shortened, and when adjusted to the required length, the second locking ring 112A is turned inward to make the inclined ring surface 1131A of the second top beam ring 113A Tighten against the oblique end face 111A of the second outer cable tube 11A end, so that the second top tightening ring 113A is tightened, and the second inner and outer cable tubes 12A, 11A are positioned as shown in FIG. 3 .

Among them, the structural feature of the first rotatable joint 4 has the function of generating rotation of the X-axis and the Y-axis. The applicant of this case has filed a utility model No. 201120365176.9 application in the previous case, and has been awarded a utility model patent of ZL201120365176.9 The authorization announcement will not be repeated here.

In the utility model, the end of the second steel cable 1 is locked to the third joint part 3 to connect the object to be tested, and the first rotatable joint 4 at the other end is connected to the tester 5. Of course, the utility model can also be used Only one steel cable 1 is used, and the third connector 3 only needs to be locked to the end of the first steel cable 1. As shown in Figure 7, the utility model can also use only one steel cable. Cable 1, and a rotatable joint at one or both ends of the locking group.

To sum up, the utility model provides that the lengths of the two steel cables can be adjusted according to requirements, and can also be rotated with the movement of the object under test and the tester, and there is no phase change due to movement or rotation.

Claims (7)

1. the coaxial test wires of phase place stabilizer pole, it is characterized in that: its mainly comprise at least one section there is the length-adjustable rigidity cable of Telescopic and between each rigidity cable or therein wherein one end group of a rigidity cable be connected to rotatable connector, formed coaxial test wires can be moved and conversion direction automatically with determinand and tester.

2. the coaxial test wires of phase place stabilizer pole as claimed in claim 1, it is characterized in that: the rigidity cable of this scalable adjustment length mainly comprises an outer cable pipe, interior cable pipe, connect core bar and connect stem stem, group is worn in outer cable pipe in this interior cable pipe one end, in interior cable pipe stage casing and end port respectively cover group have a support ring and a supporting member, this supporting member is formed with an extension portion that extends into this interior cable pipe orifice, and cover is organized a clasp on supporting member, and make supporting member be synchronous movement with outer cable pipe, and keep in touch and do not interrupt, the 3rd housing of outer cable pipe end and one second But rotary joint is connected with group, this second But rotary joint comprises the 3rd housing, connector and the 4th housing, in the coaxial aperture of the 3rd housing and supporting member, group is provided with an insulator, and be equipped with a connection stem stem at this insulator endoporus, the second chipware upper end, stage casing of being located at insulator in the connector of this connection stem stem one end and the 3rd housing group that vertical component effect is locked is vertical socket, the lower end of the second stage casing chipware has a connection core print that is subject to spring restoring force, this connector and a joining hole have the 4th housing phase interlocking of bearing and bearing holder (housing, cover), and aforementioned connection core print is socket-connected with the hole slot that is connected that second in the 4th housing rotates chipware, there is one first adapter piece the outer end of aforementioned interior cable pipe lock group, and rely on an insulator to wear group one connection core bar at the first adapter piece, this connects the inner of core bar, be formed with an extension portion that extends internally tool slotted hole, the other end cover group of aforementioned connection stem stem enters in the slotted hole of this connection core bar, and interior, outer cable pipe is when flexible, make to connect the slippage in the slotted hole that connects core bar of the stem stem other end, and make to connect stem stem and be connected core bar and keep in touch and do not interrupt.

3. the coaxial test wires of phase place stabilizer pole as claimed in claim 2, it is characterized in that: cable pipe front end lock group has a locking ring outside, and group is provided with the top beam ring part that a inner has oblique anchor ring in this locking ring, when making the oblique anchor ring of top beam ring part leave the angled end-face of outer cable pipe end the outside rotation of locking ring, and top beam ring part is unclamped, in now stretching, outer cable pipe elongates or shortens, and when being adjusted to Len req, to lock ring inwardly rotates again, the oblique anchor ring of top beam ring part is held out against in the angled end-face of outer cable pipe end, and make top beam ring part produce tight bundle, and in making, outer cable pipe reaches location.

4. the coaxial test wires of phase place stabilizer pole as claimed in claim 2, it is characterized in that: the first housing of the first adapter piece of the outer end of interior cable pipe and one first rotatable connector is connected with group, and then make to connect connection core print that core bar outer end is subject to spring restoring force and can there is the hole slot that is connected that first in bearing joining hole rotate chipware with the first housing of the first rotatable connector and be socketed, and this first rotation chipware relies on a rotation insulating part to be fixedly arranged in the first housing, and be connected with the first stage casing chipware in the connector of being located between the second housing and the first housing, and then form with the end chipware in the second housing the state that is connected, and rely on the first rotatable connector to produce the rotation of X-axis and Y-axis.

5. the coaxial test wires of phase place stabilizer pole as claimed in claim 2, it is characterized in that: at the 4th housing side interlocking hole lock group one second adapter piece of the second But rotary joint, to connect the second rigidity cable of another scalable adjustment length, this the second rigidity cable mainly comprises one second outer cable pipe, the second interior cable pipe, second connects core bar and second connects stem stem, group is worn in the second outer cable pipe in this second interior cable pipe one end, in the second interior cable pipe stage casing and end port respectively cover group have one second support ring and the second supporting member, this second supporting member is formed with an extension portion that extends into this second interior cable pipe orifice, and make the second supporting member be synchronizing moving with the second outer cable pipe, and keep in touch and do not interrupt, the second outer cable pipe end of the second rigidity cable is with interlocking cap lock group 1 the 3rd adapter piece, and second connecting stem stem one end and wear group and be fixed on the 3rd adapter piece and be located at the insulator in second interior cable pipe end the second supporting member coaxial aperture wherein, the insulator of group in the second adapter piece worn in this second connection core bar one end, same, this second other end that connects stem stem is worn group and is entered this and second connect in the slotted hole of core bar, and then in second, when outer cable pipe stretches, make second connection stem stem other end slippage in the slotted hole of the second connection core bar, and make the second connection stem stem be connected core bar with second to keep in touch and do not interrupt, rely on the second rotatable connector, make this two rigidity cable can be relative rotation.

6. the coaxial test wires of phase place stabilizer pole as claimed in claim 5, it is characterized in that: in the second outer cable pipe front end lock group, have one second locking ring, and group is provided with the second top beam ring part that a inner has oblique anchor ring in this second locking ring, when making the oblique anchor ring of the second top beam ring part leave the angled end-face of the second outer cable pipe end the outside rotation of the second locking ring, and the second top beam ring part is unclamped, now stretch in second, outer cable pipe elongates or shortens, and when being adjusted to Len req, again the second locking ring is inwardly rotated, the oblique anchor ring of the second top beam ring part is held out against in the angled end-face of the second outer cable pipe end, and make the second top beam ring part produce tight bundle, and make in second, outer cable pipe reaches location.

7. the coaxial test wires of phase place stabilizer pole as claimed in claim 2, is characterized in that: only use a rigidity cable, and one or both ends lock is organized this But rotary joint therein.

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