CN212783732U

CN212783732U - Delay line with micro coaxial structure

Info

Publication number: CN212783732U
Application number: CN202021809670.5U
Authority: CN
Inventors: 戴新峰; 张君直; 周明
Original assignee: CETC 55 Research Institute
Current assignee: CETC 55 Research Institute
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-03-23
Anticipated expiration: 2030-08-26

Abstract

The utility model provides a micro coaxial structure delay line, which comprises a delay line structure with an input port and an output port, wherein the delay line structure comprises a first transmission line, a second transmission line and a shared wall structure, the shared wall structure is arranged between the first transmission line and the second transmission line, and the first transmission line is connected with the second transmission line; the first transmission line and the second transmission line are micro-coaxial transmission lines formed in a bending mode, each micro-coaxial transmission line comprises an inner conductor and an outer conductor which are coaxially arranged, and a medium is filled in a cavity between the inner conductor and the outer conductor; the input port of the first transmission line is an input port of the delay line structure, and the output port of the second transmission line is an output port of the delay line structure. The utility model discloses this kind of structure can possess good standing wave and insertion loss in the scope of direct current to millimeter wave to have non-dispersion characteristic and signal shielding's ability, can eliminate the coupling between the time delay line effectively.

Description

Delay line with micro coaxial structure

Technical Field

The utility model relates to a coaxial technical field a little.

Background

The problem of crosstalk commonly existing in integrated circuits, including digital circuits, radio frequency and microwave, and even millimeter wave integrated circuits, is more serious with the rise of frequency. In addition, the microwave and millimeter wave frequency bands have the dispersion problem, the coaxial line is provided with the shielding shell, so that the crosstalk between lines can be eliminated, the coaxial line supports TEM mode transmission, the broadband dispersion-free signal transmission can be realized, and the two problems can be solved.

However, the conventional coaxial line has a large size and a heavy weight, is not beneficial to integration, and seriously influences the miniaturization and light weight of an electronic system.

There is a document "A390 ps On-Wafer True-Time-Delay Line Developed by a Novel Micro-Coax Technology"IEEE Microw. Wireless Compon. Lett.,The reported micro-coaxial delay line is characterized in that an inner core conductor is supported by a dielectric film, so that the reliability is poor, the engineering practicability is not high, and particularly, the reliability problem is prominent when the delay amount is large, namely, the delay line is long.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a little coaxial structure delay line, delay line structure's first transmission line, second transmission line adopt little coaxial form, can possess good standing wave and insertion loss in the scope of direct current to millimeter wave to have non-dispersion characteristic and signal shielding's ability, can eliminate the coupling between the transmission line effectively.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a delay line with a micro-coaxial structure comprises a delay line structure with an input port and an output port, wherein the delay line structure comprises a first transmission line, a second transmission line and a shared wall structure, the shared wall structure is arranged between the first transmission line and the second transmission line, and the first transmission line is connected with the second transmission line;

the first transmission line and the second transmission line are micro-coaxial transmission lines formed in a bending mode, each micro-coaxial transmission line comprises an inner conductor and an outer conductor which are coaxially arranged, and a medium is filled in a cavity between the inner conductor and the outer conductor; the medium comprises a first substrate and a second substrate which are connected up and down, the inner conductor is arranged between the first substrate and the second substrate in a penetrating mode, and two ends of the inner conductor extend out of the cavity to form an input port and an output port of the micro-coaxial transmission line; the input port of the first transmission line is an input port of the delay line structure, and the output port of the second transmission line is an output port of the delay line structure.

Furthermore, the shared wall structure is a part where the first transmission line is connected with the outer conductor of the second transmission line.

Furthermore, the cutting angles at two ends of the bending part of the inner conductor in the micro-coaxial transmission line are acute angles.

Furthermore, a reinforcing rib extends out of one surface of the first transmission line and the second transmission line, which is contacted with the inner surface of the outer conductor, and the reinforcing rib penetrates through the inner part of the outer conductor to fixedly connect the medium and the outer conductor.

Furthermore, the reinforcing ribs are arranged on the medium at intervals.

Furthermore, the substrate materials adopted by the first substrate and the second substrate are low-loss media.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the utility model discloses well delay line structure's first transmission line, second transmission line adopt little coaxial form, can possess good standing wave and insertion loss in the scope of direct current to millimeter wave to have non-dispersion characteristic and signal shielding's ability, can eliminate the coupling between the transmission line effectively.

2. The utility model discloses well delay line structure when realizing coaxial line signal shielding and non-dispersive transmission, has realized miniaturization and lightweight, and easily integration, this structure also is the broadband transmission structure simultaneously, helps realizing high performance, the miniaturization of electronic system.

3. The utility model discloses the mode that adopts acute angle corner cut to the position of buckling of the first transmission line of delay line structure, second transmission line optimizes impedance match, improves transmission efficiency, reduces the loss.

4. The utility model discloses medium outside among the little coaxial transmission line is equipped with the strengthening rib and passes the outer conductor, and the anti-impact force that the rib can strengthen the medium in other words avoids the piece.

Drawings

Fig. 1 is a schematic structural diagram of the delay line structure of the present invention;

FIG. 2 is a schematic structural diagram of the middle delay line structure (with the outer conductor removed) according to the present invention;

FIG. 3 is a schematic diagram of a micro-coaxial transmission line structure according to the present invention;

fig. 4 is a schematic view of the bending portions of the first transmission line and the second transmission line of the present invention;

in the figure: 1. a delay line structure; 2. an input port; 3. an output port; 4. a first transmission line; 5. a second transmission line; 6. a common wall structure; 7. an inner conductor; 8. an outer conductor; 9. a medium; 91. a first substrate; 92. a second substrate; 10. a bending part; 11. and (5) reinforcing ribs.

Detailed Description

The following describes the present invention with reference to the accompanying drawings and examples.

A delay line with a micro-coaxial structure, as shown in fig. 1-4, includes a delay line structure 1 with an input port 2 and an output port 3, the delay line structure 1 includes a first transmission line 4, a second transmission line 5 and a common wall structure 6, the common wall structure 6 is arranged between the first transmission line 4 and the second transmission line 5, the first transmission line 4 is connected with the second transmission line 5;

the first transmission line 4 and the second transmission line 5 are micro-coaxial transmission lines formed in a bending mode, each micro-coaxial transmission line comprises an inner conductor 7 and an outer conductor 8 which are coaxially arranged, and a cavity between the inner conductor 7 and the outer conductor 8 is filled with a medium 9; the medium 9 comprises a first substrate 91 and a second substrate 92 which are connected up and down, the inner conductor 7 is arranged between the first substrate 91 and the second substrate 92 in a penetrating way, and two ends of the inner conductor 7 extend out of the cavity to form an input port and an output port of the micro-coaxial transmission line; the input port of the first transmission line 4 is the input port 2 of the delay line structure 1, and the output port of the second transmission line 5 is the output port 3 of the delay line structure 1.

In this embodiment, the common wall structure 6 is a portion where the first transmission line 4 and the second transmission line 5 are connected to each other through the outer conductor 8.

In this embodiment, the cut angle a and the cut angle b at the bending portion 10 of the inner conductor 7 in the micro-coaxial transmission line are both acute angles.

In this embodiment, a reinforcing rib 11 extends from one surface of the first transmission line 4 and the second transmission line 5, where the medium 9 contacts with the inner surface of the outer conductor 8, and the reinforcing rib 11 is inserted into the outer conductor 8 to fixedly connect the medium 9 with the outer conductor 8.

In this embodiment, the ribs 13 are provided on the medium 9 at intervals.

In this embodiment, the substrate material used for the first substrate 91 and the second substrate 92 is quartz.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a little coaxial structure delay line which characterized in that: the delay line structure comprises a first transmission line, a second transmission line and a shared wall structure, wherein the shared wall structure is arranged between the first transmission line and the second transmission line, and the first transmission line is connected with the second transmission line;

2. The delay line of claim 1, wherein: the shared wall structure is a part where the first transmission line is connected with the outer conductor of the second transmission line.

3. The delay line of claim 1, wherein: the cutting angles at two ends of the bending part of the inner conductor in the micro coaxial transmission line are acute angles.

4. The delay line of claim 1, wherein: and reinforcing ribs extend out of the surfaces of the first transmission line and the second transmission line, which are contacted with the inner surface of the outer conductor, penetrate through the inner part of the outer conductor and fixedly connect the medium with the outer conductor.

5. The delay line of claim 4, wherein: the reinforcing ribs are arranged on the medium at intervals.

6. The delay line of claim 1, wherein: the substrate materials adopted by the first substrate and the second substrate are low-loss media.