CN211125931U - Phase-shifting circuit, phase shifter and electrically-tunable antenna - Google Patents

Abstract

The utility model relates to a phase shift circuit and move looks ware, phase shift circuit includes that fixed circuit, auxiliary circuit possess the movable circuit. The movable circuit is slidably arranged in a containing cavity formed by the auxiliary circuit and the fixed circuit in a penetrating way. The movable circuit layer is not only directly coupled and electrically connected with the fixed circuit layer, but also coupled and electrically connected with the auxiliary circuit, so that the coupling effect between the movable circuit and the fixed circuit is enhanced. In addition, because the movable circuit is arranged in the accommodating cavity enclosed by the fixed circuit and the auxiliary circuit in a penetrating way, when the movable circuit slides, the movable circuit is always limited to a specific area, thereby keeping the coupling and the electric connection with the fixed circuit and the auxiliary circuit. Therefore, the phase shifter can ensure the stability of performance without adopting an additional fixing piece, and has simple structure. Furthermore, the utility model also provides an antenna is transferred to electricity.

Description

Phase-shifting circuit, phase shifter and electrically-tunable antenna

Technical Field

The utility model relates to a wireless communication technology field, in particular to phase shift circuit, move looks ware and electricity accent antenna.

Background

In mobile communication network coverage, an electrically-adjusted base station antenna is one of the key devices of an overlay network, and a phase shifter is the most core component of the electrically-adjusted base station antenna. The existing phase shifter mainly adopts two modes of realizing phase shifting, namely a dielectric sliding mode and a conductor sliding mode.

The conductor sliding type phase shifter changes the electrical length of the phase shifter by moving the conductor, thereby achieving the purpose of phase change. Generally comprising a fixed circuit, a movable coupling circuit. There may be undulations in the coupling circuit during sliding that create gaps with the fixed circuit, resulting in a coupling failure with the fixed circuit. In order to ensure the coupling reliability between the coupling circuit and the fixed circuit, more fixing members are generally adopted to press and fix the coupling circuit onto the surface of the fixed circuit. However, this causes the structure of the phase shifter to become complicated.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a phase shifting circuit, a phase shifter and an electrically tunable antenna with simple structures, aiming at the problem that the existing phase shifter has a complex structure.

A phase shifting circuit comprising:

a fixed circuit having a fixed line layer;

the auxiliary circuit is arranged on the fixed circuit and is electrically connected with the fixed circuit layer, and an accommodating cavity is formed between the auxiliary circuit and the fixed circuit; and

the movable circuit is provided with a movable circuit layer which can be slidably arranged in the containing cavity in a penetrating way and is respectively coupled and electrically connected with the fixed circuit layer and the auxiliary circuit.

In one embodiment, the fixed circuit further includes a fixed substrate, and the fixed circuit layer is formed on a side of the fixed substrate facing the auxiliary circuit.

In one embodiment, the auxiliary circuit includes a metal plate and a pin protruding from an edge of the metal plate toward the fixed circuit, a pad is disposed on the fixed substrate at a position corresponding to the pin, and the pad is soldered to the pin.

In one embodiment, the auxiliary circuit includes a metal bottom plate and a metal side plate bent from edges of two opposite sides of the metal bottom plate to the fixed circuit, a strip-shaped bonding pad is disposed at a position of the fixed substrate corresponding to the metal side plate, and the strip-shaped bonding pad is welded to an end face of the metal side plate.

In one embodiment, the auxiliary circuit is a hollow metal cylindrical structure, and one of the outer walls of the auxiliary circuit is attached to the fixed substrate and welded to the fixed substrate.

In one embodiment, each of the fixed line layers includes two parallel transmission lines arranged at intervals.

In one embodiment, an isolation strip is disposed between two of the transmission lines.

In one embodiment, the isolation strip is a metal sheet vertically arranged on the fixed substrate and consistent with the extending direction of the transmission line.

In one embodiment, the isolation strip is a circuit board which is covered on the fixed substrate and is grounded.

In one embodiment, the fixed circuit comprises a plurality of fixed line layers, so that a plurality of output interfaces are formed on the fixed circuit.

In one embodiment, the movable circuit includes a movable substrate, the movable line layer includes a first movable line layer and a second movable line layer formed on opposite sides of the movable substrate and coupled to the fixed line layer and the auxiliary circuit, respectively.

In one embodiment, the first movable line layer and the second movable line layer are electrically connected by a metalized via.

In one embodiment, the movable line layer matches the shape of the fixed line layer.

A phase shifter comprising a cavity and a phase shifting circuit as described in any of the above preferred embodiments, said phase shifting circuit being housed within said cavity.

In the phase shift circuit, the movable circuit layer is not only directly coupled and electrically connected with the fixed circuit layer, but also coupled and electrically connected with the auxiliary circuit, so that the coupling effect between the movable circuit and the fixed circuit is enhanced. In addition, because the movable circuit is arranged in the accommodating cavity enclosed by the fixed circuit and the auxiliary circuit in a penetrating way, when the movable circuit slides, the movable circuit is always limited to a specific area, thereby keeping the coupling and the electric connection with the fixed circuit and the auxiliary circuit. Therefore, the phase shifter can ensure the stability of performance without adopting an additional fixing piece, and has simple structure.

Furthermore, the utility model provides an antenna is transferred to electricity, this antenna is transferred to electricity include like above-mentioned preferred embodiment the looks ware.

Drawings

FIG. 1 is a schematic diagram of a phase shift circuit according to an embodiment of the present invention;

FIG. 2 is an exploded view of the phase shift circuit of FIG. 1;

fig. 3 is a schematic structural diagram of a phase shift circuit according to another embodiment of the present invention;

FIG. 4 is an exploded view of the phase shift circuit of FIG. 3;

FIG. 5 is a schematic diagram of a phase shift circuit according to yet another embodiment of the present invention;

FIG. 6 is an exploded view of the phase shift circuit shown in FIG. 5;

fig. 7 is a schematic structural diagram of a fixed circuit according to an embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a phase shift circuit 100. Furthermore, the utility model also provides an electricity is transferred the antenna and is moved looks ware and move looks ware. By means of the phase shifter, the electrically tunable antenna can realize adjustment of a downward inclination angle, so that better network coverage is realized. The phase shifter includes a cavity (not shown) and a phase shift circuit 100 housed in the cavity.

Referring to fig. 2, the phase shift circuit 100 according to the preferred embodiment of the present invention includes a fixed circuit 110, an auxiliary circuit 120, and a movable circuit 130.

The fixed circuit 110 has a fixed wiring layer 111. The fixed line layer 111 may be in the form of a strip line, a microstrip line, or the like. The fixed line layer 111 is a main line for signal transmission in the phase shifter. Each fixed line layer may be provided with an interface for acting as an input interface 101 or an output interface 102 of the phase shifter. As shown in fig. 1, the fixed circuit 110 has a fixed circuit layer 111, and the fixed circuit layer 111 is provided with 1 input interface 101 and 1 output interface 102. Therefore, the phase shift circuit 100 can be applied to an input-output phase shifter.

Obviously, the number of ports of the phase shifter can be adjusted according to different requirements and application scenarios, so the number of the fixed circuit layers 111 in the fixed circuit 110 and the number of ports thereon also vary correspondingly. In other embodiments, the fixed circuit 110 includes a plurality of fixed circuit layers 111, such that a plurality of output interfaces 102 are formed on the fixed circuit 110. Such as:

the fixed circuit 110 shown in fig. 7 has 6 fixed circuit layers 111 thereon, and forms 7 output interfaces 102 and 1 input interface 101. In this case, the phase shift circuit 100 can be applied to a one-input seven-output phase shifter.

The fixed circuit 110 may be a PCB structure, and the fixed circuit layer 111 is printed. The fixed circuit 110 may be a dielectric circuit board structure or a metal three-dimensional circuit structure.

Specifically, in the present embodiment, the fixed circuit 110 further includes a fixed substrate 113, and the fixed circuit layer 111 is formed on a side of the fixed substrate 113 facing the auxiliary circuit 120. The fixing substrate 113 is generally formed of a dielectric material and can perform a bearing function, thereby facilitating the fixing and mounting of the fixing circuit 110.

As shown in fig. 7, in the present embodiment, a plurality of fixed circuit layers 111 may be sequentially arranged on the same fixed substrate 113 and electrically connected by a coaxial cable. Further, the fixed circuit 110 may have a plurality of fixed wiring layers 111 by bonding a plurality of fixed substrates 113 provided with the fixed wiring layers 111.

The auxiliary circuit 120 is disposed at a position of the fixed circuit 110 corresponding to the fixed circuit layer 111 and electrically connected to the fixed circuit layer 111. Like the fixed circuit 110, the auxiliary circuit 120 may be in various circuit forms such as a PCB structure, a dielectric circuit board structure, or a metal three-dimensional circuit structure. Since the auxiliary circuit layer 120 is electrically connected to the fixed circuit layer 111, the auxiliary circuit layer 120 can be used as a branch of the fixed circuit 110, and the auxiliary circuit layer 120 can be used as a sub-line for signal transmission in the phase shifter.

A receiving cavity (not shown) is formed between the auxiliary circuit 120 and the fixed circuit 110. The receiving cavity is used for receiving the movable circuit 130. The auxiliary circuit 120 and the fixed circuit 110 may be integrally formed. For example, the auxiliary circuit 120 and the fixed circuit 110 may be dielectric circuit board structures. The dielectric substrates of the two are integrally formed, and a hollow cavity is formed; then, a fixed wiring layer 111 and other circuits are formed in a predetermined shape on the surface of the dielectric base material by printing or the like.

However, since the cavity structure needs to be formed, the integral molding has higher requirements on the precision of the mold and the molding process. Therefore, the auxiliary circuit 120 and the fixed circuit 110 in this embodiment are two separately formed components and are assembled subsequently. The shape and structure of the auxiliary circuit 120 include various possibilities, and therefore, the assembly manner of the auxiliary circuit and the fixed circuit 110 also has various possibilities. Such as:

as shown in fig. 1 and 2, in the present embodiment, the auxiliary circuit 120 includes a metal plate 121 and a pin 123 protruding from an edge of the metal plate 121 toward the fixed circuit 110, a pad 1131 is disposed at a position of the fixed substrate 113 corresponding to the pin 123, and the pad 1131 is soldered to the pin 123.

Specifically, the auxiliary circuit 120 is a pure metal member, so that the molding is simple and the reliability is high. The pads 1131 may be planar pads or slot-in pads. During assembly, the pin 123 is aligned with the pad 1131, and welding is achieved by means of furnace welding and the like, so that the machining efficiency can be remarkably improved. In this case, the fixed substrate 113 and the auxiliary circuit 120 may be respectively used as two opposite sidewalls of the receiving cavity.

In addition, impedance matching can be realized for the phase shift circuit 100 by changing the shape and width of the metal plate body 121 and the width and pitch of the pins 123.

As shown in fig. 3 and 4, in another embodiment, the auxiliary circuit 120 includes a metal bottom plate 121 ' and a metal side plate 123 ' bent from the edges of the two opposite sides of the metal bottom plate 121 ' toward the fixed circuit 110, and a strip-shaped pad (not shown) is disposed at a position of the fixed substrate 113 corresponding to the metal side plate 123 ', and is welded to the end surface of the metal side plate 123 '.

At this time, the auxiliary circuit 120 has a U-shaped groove structure, and is different from the auxiliary circuit 120 in the previous embodiment in that the pins 123 are replaced by metal side plates 123'.

As shown in fig. 5 and 6, in another embodiment, the auxiliary circuit 120 is a hollow metal cylinder structure, and one of the outer walls of the auxiliary circuit 120 is attached to the fixed substrate 113 and welded to the fixed substrate 113.

Specifically, the fixing substrate 113 may also be provided with a strip-shaped pad or a plurality of dot-shaped pads for welding with the side wall of the auxiliary circuit 120. At this time, the receiving cavity is located inside the auxiliary circuit 120.

Referring again to fig. 1 and 2, the movable circuit 130 has a movable circuit layer 131. The movable line layer 131 may be a strip line or a microstrip line. Also, like the fixed circuit 110, the movable circuit 130 may have various circuit forms such as a PCB structure, a dielectric circuit board structure, or a metal three-dimensional circuit structure.

Further, the movable circuit 130 is slidably disposed through the receiving cavity, and the movable circuit layer 131 is electrically coupled to the fixed circuit layer 111 and the auxiliary circuit 120. Specifically, insulating layers may be disposed on the movable circuit 130, the auxiliary circuit 120 and the fixed circuit 110, so as to prevent the movable circuit layer 131 from directly contacting the auxiliary circuit 120 and the fixed circuit 110, thereby achieving coupling.

By sliding the movable circuit 130, the coupling amount of the movable line layer 131 with the fixed line layer 111 and the auxiliary circuit 120 can be changed, so as to change the electrical length in the phase shift circuit 100, thereby realizing the phase adjustment of each output interface 102.

For the case where the fixed circuit 110 includes a plurality of fixed circuit layers 111, a plurality of movable circuits 130 may be respectively coupled with the plurality of fixed circuit layers 111. Further, it is also possible to employ the movable circuit 130 including a plurality of movable line layers 131, and to couple the plurality of movable line layers 131 with the plurality of fixed line layers 111, respectively.

Since the movable circuit layer 131 is not only directly coupled and electrically connected with the fixed circuit layer 111, but also coupled and electrically connected with the auxiliary circuit 120. And the auxiliary circuit 120 may be considered a branch of the fixed circuit 110. Therefore, the coupling between the movable circuit 130 and the fixed circuit 110 is strengthened, thereby making the performance of the phase shifter more stable.

The accommodating cavity is used for limiting the movable circuit 130. Therefore, the movable circuit 130 does not fluctuate widely during the sliding process, thereby preventing the coupling failure between the fixed circuit 110 and the auxiliary circuit 120. Moreover, since no other component is used to press the movable circuit 130, the sliding resistance of the movable circuit 130 is small.

Generally, the thickness of the receiving cavity in the natural state is equal to or slightly greater than the thickness of the movable circuit 130, so that the movable circuit 130 can be smoothly inserted into the receiving cavity, but both sides of the receiving cavity are kept in contact with the inner wall of the receiving cavity. Therefore, the inner wall of the accommodating cavity can well limit the position of the movable circuit 130 without using other elements. Therefore, the movable circuit 130 can always keep contact with the inner wall of the receiving cavity when sliding, thereby further ensuring the stability of coupling.

In the present embodiment, the movable circuit 130 includes a movable substrate 133, and the movable line layer 131 includes a first movable line layer (not shown) and a second movable line layer 1312 formed on two opposite sides of the movable substrate 133 and respectively coupled to the fixed line layer 111 and the auxiliary circuit 120.

Specifically, the first movable line layer and the second movable line layer 131 may be two identical line structures. The first movable line layer and the second movable line layer 1312 may be electrically connected through a metalized via (not shown). The first movable line layer is not shown in FIG. 2 because it is located on the downward side of the movable circuit 130.

When the movable circuit 130 is disposed in the receiving cavity, the first movable circuit layer and the second movable circuit layer 1312 can respectively fit with two inner walls of the receiving cavity, thereby enhancing the coupling effect between the movable circuit 130 and the auxiliary circuit 120 and between the movable circuit 130 and the fixed circuit 110. Moreover, in order to facilitate the sliding of the movable circuit 130, the end of the movable substrate 133 may be formed with a through hole as a driving portion of the movable circuit 130.

It is noted that in other embodiments, the movable circuit 130 is not limited to the above-described structure. For example, the movable circuit 130 shown in fig. 3 and 4 is a three-dimensional metal circuit without a substrate, and the entire movable circuit 130 is the movable circuit layer 131. Thus, the two sides of the movable circuit layer 131 can also be attached to the two inner walls opposite to the accommodating cavity.

In this embodiment, the movable line layer 131 matches the shape of the fixed line layer 111.

Specifically, shape matching refers to an orthographic projection of the movable line layer 131 on the fixed circuit 110, at least partially overlapping the fixed line layer 111. Thus, the coupling of the movable line layer 131 with the fixed line layer 111 is further enhanced at the same size.

For example, in the present embodiment, each of the fixed circuit layers 111 includes two parallel transmission lines (not shown) disposed at intervals. Correspondingly, the movable line layer 131, in particular the first movable line layer, may be arranged in a U-shape. Each transmission line pair may correspond to one auxiliary circuit 120, or one auxiliary circuit 120 may simultaneously correspond to two transmission lines in the same fixed line layer 111.

Specifically, in the present embodiment, two auxiliary circuits 120 are disposed on each fixed circuit layer 111, and correspond to two transmission lines respectively.

Moreover, the corresponding impedances are different due to the different widths of the transmission lines. Therefore, by setting different widths of the transmission lines, impedance matching of the phase shifter can also be achieved.

It is to be understood that the shape of the fixed wiring layer 111 may be adjusted to various shapes such as L shape and S shape according to the requirement, and the shape of the fixed wiring layer 131 may be adjusted accordingly.

Referring to fig. 3 to 6, in one embodiment, an isolation strip 140 is disposed between two transmission lines. The isolation strip 140 can reduce the mutual coupling between two transmission lines, thereby improving the index of the phase shifter, and the form of the isolation strip 140 can be various, and only needs to play the role of isolation coupling. Such as:

as shown in fig. 3 and 4, in one embodiment, the isolation strip 140 is a metal sheet that is vertically disposed on the fixed substrate 113 and aligned with the extending direction of the transmission line. The metal sheet has simple structure, is firm and reliable, and is favorable for reducing the cost of the phase shifter.

In another embodiment, as shown in fig. 5 and 6, the isolation strip 140 is a circuit board covering the fixed substrate 113 and grounded.

Specifically, the fixed substrate 113 may be a PCB circuit board, and the grounding is achieved through a metalized via. Since the circuit board can be attached to the surface of the fixed substrate 113, the surface height of the fixed circuit 110 can be reduced, which is advantageous for miniaturization of the phase shifter.

In the phase shift circuit 100, the movable line layer 131 is not only directly coupled to the fixed line layer 111 but also coupled to the auxiliary circuit 120, so that the coupling between the movable circuit 130 and the fixed circuit 110 is enhanced. In addition, since the movable circuit 130 is disposed in the receiving cavity surrounded by the fixed circuit 110 and the auxiliary circuit 120, when the movable circuit 130 slides, it is always limited to a specific area, so as to maintain the coupling and electrical connection with the fixed circuit 110 and the auxiliary circuit 120. Therefore, the phase shifter can ensure the stability of performance without adopting an additional fixing piece, and has simple structure.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (15)

1. A phase shifting circuit, comprising:

a fixed circuit having a fixed line layer;

the auxiliary circuit is arranged on the fixed circuit and is electrically connected with the fixed circuit layer, and an accommodating cavity is formed between the auxiliary circuit and the fixed circuit; and

the movable circuit is provided with a movable circuit layer which can be slidably arranged in the containing cavity in a penetrating way and is respectively coupled and electrically connected with the fixed circuit layer and the auxiliary circuit.

2. The phase shift circuit according to claim 1, wherein the fixed circuit further comprises a fixed substrate, and the fixed wiring layer is formed on a side of the fixed substrate facing the auxiliary circuit.

3. The phase shift circuit according to claim 2, wherein the auxiliary circuit comprises a metal plate and a lead protruding from an edge of the metal plate toward the fixed circuit, and a pad is disposed on the fixed substrate at a position corresponding to the lead and soldered to the lead.

4. The phase shift circuit according to claim 2, wherein the auxiliary circuit comprises a metal base plate and a metal side plate bent from edges of two opposite sides of the metal base plate toward the fixed circuit, a strip-shaped bonding pad is disposed at a position of the fixed base plate corresponding to the metal side plate, and the strip-shaped bonding pad is welded to an end face of the metal side plate.

5. The phase shift circuit according to claim 2, wherein the auxiliary circuit has a hollow metal cylindrical structure, and one of outer walls of the auxiliary circuit is attached to the fixed substrate and welded to the fixed substrate.

6. The phase shifting circuit of claim 2, wherein each of the fixed line layers comprises two parallel and spaced transmission lines.

7. The phase shifting circuit of claim 6, wherein an isolation strip is disposed between the two transmission lines.

8. The phase shift circuit according to claim 7, wherein the isolation strip is a metal plate standing on the fixing substrate and aligned with the extending direction of the transmission line.

9. The phase shifting circuit of claim 7, wherein the isolation strip is a circuit board that overlies the fixed substrate and is grounded.

10. The phase shifting circuit of claim 1, wherein the fixed circuit comprises a plurality of fixed line layers such that a plurality of output interfaces are formed on the fixed circuit.

11. The phase shifting circuit of claim 1, wherein the movable circuit comprises a movable substrate, and wherein the movable line layer comprises a first movable line layer and a second movable line layer formed on opposite sides of the movable substrate and coupled to the fixed line layer and the auxiliary circuit, respectively.

12. The phase shifting circuit of claim 11, wherein the first movable line layer and the second movable line layer are electrically connected by a metalized via.

13. The phase shifting circuit of claim 1, wherein the movable line layer matches the shape of the fixed line layer.

14. A phase shifter comprising a cavity and the phase shift circuit according to any one of claims 1 to 13, the phase shift circuit being housed in the cavity.

15. An electrically tunable antenna comprising a phase shifter according to claim 14.

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