CN212162038U

CN212162038U - Phase shifter and antenna

Info

Publication number: CN212162038U
Application number: CN202021160870.2U
Authority: CN
Inventors: 贾飞飞; 薛泉
Original assignee: South China University of Technology SCUT; Comba Telecom Technology Guangzhou Ltd
Current assignee: South China University of Technology SCUT; Comba Telecom Technology Guangzhou Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-12-15
Anticipated expiration: 2030-06-19

Abstract

The utility model provides a move looks ware and antenna, its technical scheme main points move looks ware and include the cavity and install the circuit board in the cavity, be equipped with phase shift network and transmission terminal on the circuit board, phase shift network locates the cavity is interior and have input/output port, transmission terminal with input/output port connects and can stretch out outside the cavity, transmission terminal is the microstrip line structure, transmission terminal include with phase shift network electricity be connected realize transmit electric signal function the transmission layer and with the ground plane that the cavity electricity is connected. Through set up the transmission terminal on the circuit board, the transmission terminal can stretch out the cavity body and be connected with other radio frequency parts electricity of antenna outward, thereby utilize the transmission layer of microstrip line structure and move the phase network connection and carry out signal transmission with moving the outside radio frequency part of looks ware, avoid adopting the cable to connect the transmission, reduced the insertion loss, also make move looks ware and other radio frequency parts's connection structure more retrench, improved the producibility of product.

Description

Phase shifter and antenna

Technical Field

The utility model relates to a mobile communication technology field especially relates to a move looks ware and antenna.

Background

The phase shifter is a core device of the electrically-adjusted base station antenna, and with the development of the technology, low intermodulation, low insertion loss, high integration and high producibility become a research hotspot of the phase shifter technology. At present, a cavity type sliding medium phase shifter becomes a main research and design direction in the industry, and the phase shifter utilizes medium sliding to change the coverage area of a medium material on a signal transmission path to achieve the phase shifting effect, so that the phase shifter has an obvious intermodulation advantage compared with the traditional scheme of changing the electrical length by metal sliding.

With the development of the technology, the base station antenna needs to have higher integration level, higher producibility and lower insertion loss, and the existing cavity type sliding dielectric phase shifter needs a large amount of cable switching, which is not beneficial to improving the integration level and is easy to generate the insertion loss.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first purpose aims at providing a looks ware that moves of reducible cable switching.

Another object of the present invention is to provide an antenna using the above phase shifter.

In order to achieve the above object, the present invention provides the following technical solutions:

a phase shifter comprises a cavity and a circuit board arranged in the cavity, wherein a phase shifting network and a transmission terminal are arranged on the circuit board, the phase shifting network is arranged in the cavity and is provided with an input/output port, the transmission terminal is connected with the input/output port and can extend out of the cavity, the transmission terminal is of a microstrip line structure, and the transmission terminal comprises a transmission layer which is electrically connected with the phase shifting network and realizes the function of transmitting electric signals and a ground layer which is electrically connected with the cavity.

Further setting: and a mounting notch for the circuit board to be inserted into the cavity is formed in one side wall of the cavity along the length direction of the cavity.

Further setting: and a welding layer which can be fixedly welded with the cavity is also arranged on the circuit board close to the mounting notch.

Further setting: the positive and negative both sides of circuit board all are equipped with the welding layer, just set up the metal via hole that makes the welding layer interconnect on positive and negative both sides on the circuit board, the transmission layer with the ground plane divides the both sides of locating the circuit board, is close to the welding layer on one side of the ground plane is connected with the ground plane.

Further setting: the welding layers are distributed at intervals or continuously along the length direction of the circuit board.

Further setting: and a side wall of the cavity far away from the mounting notch is provided with a mounting groove for the circuit board to be fixedly inserted.

Further setting: the circuit board is far away from the spacing portion of protruding formation on the side of transmission terminal, set up on the lateral wall of keeping away from on the cavity installation breach and supply spacing portion passes spacing hole.

Further setting: the circuit board is provided with a transmission terminal, one side of the circuit board close to the transmission terminal is protruded to form an extension part corresponding to the transmission terminal, and the transmission layer and the grounding layer are respectively arranged on the front surface and the back surface of the extension part.

Further setting: the phase shift network comprises a phase shift circuit and a power dividing circuit, and the phase shift network comprises at least two output ports.

The utility model also provides an antenna, including foretell looks ware.

Compared with the prior art, the utility model discloses a scheme has following advantage:

1. the utility model relates to an among the looks ware, through set up the transmission terminal on the circuit board, the transmission terminal protractile cavity body is external to be connected with other radio frequency parts electricity of antenna, thereby utilize microstrip line structure's transmission layer and move looks internet access and carry out signal transmission with the outside radio frequency parts of looks ware, avoid adopting the cable to connect the transmission, reduced the insertion loss, also make move looks ware and other radio frequency parts's connection structure more retrench, improved producibility and production efficiency.

2. The utility model relates to an among the antenna, through adopting foretell looks ware that moves, the transmission of signal is realized through transmission terminal and other radio frequency parts to the network that moves in the phase, has got rid of the use of cable, has promoted the holistic degree of integrating of antenna, has reduced because the interpolation that produces of cable decreases, has promoted the performance index of antenna.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a phase shifter according to an embodiment of the present invention;

fig. 2 is a side view of a phase shifter according to an embodiment of the present invention;

fig. 3 is a schematic front view of a circuit board according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a back structure of a circuit board according to an embodiment of the present invention;

fig. 5 is a schematic side view of the cavity according to an embodiment of the present invention;

fig. 6 is a schematic view of a back structure of the cavity according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a phase shifter according to another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and 2, the utility model provides an antenna, including moving the looks ware, move the looks ware and include cavity 1, install circuit board 2 in cavity 1 and divide and locate the sliding medium board 3 of circuit board 2 both sides, in this embodiment, cavity 1 only sets up an inner chamber, in other embodiments, cavity 1 still can set up a plurality of inner chambers, and the structure of every inner chamber is unanimous and all is equipped with circuit board 2 and sliding medium board 3.

Referring to fig. 3 and 4, the circuit board 2 is provided with a phase shift network 21 located in the cavity 1 and a transmission terminal 22 connected to an input/output port of the phase shift network 21 and extending out of the cavity 1, the transmission terminal 22 is a microstrip line structure, the transmission terminal 22 includes a transmission layer 221 electrically connected to the phase shift network 21 to realize a function of transmitting an electrical signal and a ground layer 222 electrically connected to the cavity 1, and the transmission layer 221 and the ground layer 222 are respectively disposed on the front and back surfaces of the circuit board 2.

The utility model discloses an in moving the looks ware, can stretch out to the transmission terminal 22 outside cavity 1 through setting up on circuit board 2, be connected with other radio frequency parts of antenna, replaced the effect that adopts feeder cable to carry out the connection among the current phase shifter structure. Since the transmission terminal 22 has a microstrip line structure, the transmission layer 221 on the microstrip line structure plays a role of transmitting signals, and plays a role similar to that of the inner conductor of the conventional feed cable, and the ground layer 222 on the microstrip line structure is used for being electrically connected to the cavity 1 to form a ground, and plays a role similar to that of the outer conductor of the conventional feed cable. By adopting the structure that the transmission terminal 22 extends out of the cavity 1, the transmission function can be the same as that of the existing feed cable, the transmission terminal 22 can be directly and electrically connected with the feed structure of the radiation unit without adopting the feed cable, and the insertion loss caused by the addition of the feed cable is reduced. In addition, compared with the existing method of transmitting by adopting a feed cable, the feed cable is troublesome to arrange and fix, occupies a large space, and transmits signals by the structure of the transmission terminal 22, thereby greatly reducing the complexity of the antenna, reducing the production difficulty and improving the production efficiency.

Further, the phase shift network 21 includes a phase shift circuit and a power dividing circuit, and the phase shift network 21 includes at least two output ports, in this embodiment, the phase shift network 21 includes one input port and three output ports, and the transmission terminals 22 are correspondingly provided with four. A plurality of output ports are arranged to be respectively correspondingly connected with the plurality of radiation units.

In the present embodiment, the phase shift network 21 includes metal strips disposed on both sides of the circuit board 2, and the metal strips on both sides of the circuit board 2 are connected to each other through via holes disposed on the circuit board 2. The circuit board 2, the sliding dielectric plate 3 and the cavity 1 together form a strip line structure, and the transmission terminal 22 is connected with the phase shifting network 21 and can penetrate out of the cavity 1, so that the strip line structure is converted into a micro-strip line structure.

Referring to fig. 5, in this embodiment, a side wall of the cavity 1 is provided with an installation notch 11 along a length direction thereof, through which the circuit board 2 can be inserted into the cavity 1. Specifically, the mounting notches 11 extend to both ends of the cavity 1. When the circuit board 2 is inserted into the cavity 1 along the installation notch 11, the phase shift network 21 on the circuit board 2 is located in the cavity 1, and the transmission terminal 22 is exposed outside the cavity 1 and used for connecting with other radio frequency components outside the cavity 1.

In this embodiment, an extending portion 23 corresponding to the transmission terminal 22 is formed by protruding a side of the circuit board 2 close to the transmission terminal 22, and the transmission layer 221 and the ground layer 222 are respectively disposed on the front and back surfaces of the extending portion 23, in other embodiments, the protruding extending portion 23 may not be disposed, that is, the side of the circuit board 2 where the transmission terminal 22 is disposed is a straight structure. Through the side protrusion at circuit board 2 and form extension 23 for set up transmission terminal 22, both can save circuit board 2 material, can make transmission terminal 22 more obvious again, counterpoint when being connected with other radio frequency parts more easily and fix, in addition, extension 23's protrusion structure still can pass the reflecting plate and penetrate to the radiating element in connect, make antenna overall structure compacter, improve the degree of integrating of antenna.

In this embodiment, the mounting notch 11 on the cavity 1 is opened at a side close to the transmission terminal 22, and when the circuit board 2 is inserted into the cavity 1, a side of the circuit board 2 away from the transmission terminal 22 is inserted into the cavity 1. In other embodiments, the installation notch 11 of the cavity 1 may also be opened at a side far from the transmission terminal 22, and when the circuit board 2 is inserted into the cavity 1, one side of the circuit board 2 close to the transmission terminal 22 first passes through the installation notch 11 and penetrates out of the other side wall of the cavity 1.

Furthermore, a mounting groove 12 for inserting and fixing the circuit board 2 is formed in a side wall of the cavity 1 away from the mounting notch 11. The mounting groove 12 is opposite to the mounting notch 11 and is located on the same plane. The mounting notch 11 and the mounting groove 12 jointly provide supporting and clamping fixing effects for the circuit board 2, and the stability of mounting and fixing of the circuit board 2 and the cavity 1 is ensured.

As shown in fig. 6, further, a limiting portion 24 is formed by protruding from a side of the circuit board 2 far away from the transmission terminal 22, the limiting portion 24 is provided with a plurality of limiting holes at intervals along the length direction of the circuit board 2, a side wall of the cavity 1 far away from the installation notch 11 is provided with a plurality of limiting holes 13 through which the limiting portion 24 can pass, the limiting holes 13 are provided with a plurality of corresponding limiting portions 24, specifically, the limiting holes 13 are provided in the installation grooves 12, in other embodiments, the installation grooves 12 may not be provided on the inner wall of the cavity 1, only the limiting holes 13 may be provided, and the limiting portions 24 are used to pass through the limiting holes 13 for fixing.

Benefit from cavity 1 to adopt the special construction of seting up installation breach 11 at the lateral wall, different with current cavity 1 structure, circuit board 2 inserts to cavity 1 from the lateral wall of cavity 1 in, makes spacing portion 24 on the circuit board 2 can insert to the spacing hole 13 on the lateral wall of cavity 1 in, and restriction circuit board 2 moves along cavity 1 length direction, has promoted the reliability that circuit board 2 is connected with cavity 1.

In this embodiment, a soldering layer 25 capable of being soldered to the cavity 1 is further disposed on the circuit board 2 near the mounting notch 11. Specifically, after the circuit board 2 is inserted into the cavity 1, the soldering layer 25 is exposed outside the cavity 1 and is located near the mounting notch 11 of the cavity 1. The circuit board 2 is fixedly welded with the side wall of the cavity 1 through the welding layer 25, a manual welding mode is adopted, soldering tin welding is formed between the circuit board 2 and the side wall of the cavity 1, welding reliability is high, and the phenomenon of insufficient soldering and missing welding is not easy to occur.

Preferably, the tow sides of circuit board 2 all are equipped with the welding layer 25, just set up the metal via hole 26 that makes the welding layer 25 interconnect on tow sides on circuit board 2, adopt the welding layer 25 structure of two-sided design, circuit board 2 is two-sided and carries out welded fastening with cavity 1, further promotes circuit board 2 and cavity 1's reliability of being connected.

In one embodiment, the soldering layer 25 may be distributed along the length direction of the circuit board 2 at intervals, and a portion of the soldering layer 25 near one side of the ground layer 222 is connected to the ground layer 222.

In another embodiment, as shown in fig. 7, the soldering layer 25 may be continuously distributed along the length direction of the circuit board 2 and extend to both ends of the circuit board 2, and the soldering layer 25 near one side of the ground layer 222 is connected to the ground layer 222.

The welding layer 25 is connected with the ground layer 222, so that the ground layer 222 is grounded, the cavity 1 and the phase shifting network 21 on the circuit board 2 jointly form a closed strip line structure, and the stability of circuit transmission in the cavity 1 is ensured.

Preferably, the side wall of the cavity 1 is provided with an avoiding gap 14 at a position close to the transmission terminal 22, and the transmission layer 221 on the transmission terminal 22 can be prevented from contacting the side wall of the cavity 1 by the avoiding gap 14, so that the influence on signal transmission is avoided.

To sum up, the utility model discloses a scheme has following advantage:

1. the utility model relates to an among the looks shifter, through set up transmission terminal 22 on circuit board 2, transmission terminal 22 can stretch out cavity 1 and be connected with other radio frequency parts electricity of antenna outward, thereby utilize microstrip line structure's transmission layer 221 and phase shift network 21 to be connected and carry out signal transmission with the outside radio frequency parts of looks shifter, avoid adopting the cable to connect the transmission, the insertion loss has been reduced, also make to move looks ware and other radio frequency parts's connection structure more retrench, producibility and production efficiency have been improved.

2. The utility model relates to an in moving looks ware, adopt and set up half confined cavity 1 structure of installation breach 11 on the lateral wall, can supply circuit board 2 to insert to cavity 1 in from 1 lateral wall of cavity, spacing portion 24 on the circuit board 2 can insert and locate the spacing downthehole 13 of cavity 1 to restriction circuit board 2 removes along 1 length direction of cavity, has improved circuit board 2 and cavity 1's reliability of being connected.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of 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 move looks ware, includes the cavity and installs the circuit board in the cavity, characterized by: the circuit board is provided with a phase shifting network and a transmission terminal, the phase shifting network is arranged in the cavity and is provided with an input/output port, the transmission terminal is connected with the input/output port and can extend out of the cavity, the transmission terminal is of a microstrip line structure, and the transmission terminal comprises a transmission layer which is electrically connected with the phase shifting network to realize the function of transmitting electric signals and a ground layer which is electrically connected with the cavity.

2. The phase shifter as recited in claim 1, wherein: and a mounting notch for the circuit board to be inserted into the cavity is formed in one side wall of the cavity along the length direction of the cavity.

3. The phase shifter as recited in claim 2, wherein: and a welding layer which can be fixedly welded with the cavity is also arranged on the circuit board close to the mounting notch.

4. The phase shifter as recited in claim 3, wherein: the positive and negative both sides of circuit board all are equipped with the welding layer, just set up the metal via hole that makes the welding layer interconnect on positive and negative both sides on the circuit board, the transmission layer with the ground plane divides the both sides of locating the circuit board, is close to the welding layer on one side of the ground plane is connected with the ground plane.

5. The phase shifter as recited in claim 3, wherein: the welding layers are distributed at intervals or continuously along the length direction of the circuit board.

6. The phase shifter as recited in claim 2, wherein: and a side wall of the cavity far away from the mounting notch is provided with a mounting groove for the circuit board to be fixedly inserted.

7. The phase shifter as recited in claim 2, wherein: the circuit board is far away from the spacing portion of protruding formation on the side of transmission terminal, set up on the lateral wall of keeping away from on the cavity installation breach and supply spacing portion passes spacing hole.

8. The phase shifter as recited in claim 1, wherein: the circuit board is provided with a transmission terminal, one side of the circuit board close to the transmission terminal is protruded to form an extension part corresponding to the transmission terminal, and the transmission layer and the grounding layer are respectively arranged on the front surface and the back surface of the extension part.

9. The phase shifter as recited in claim 1, wherein: the phase shift network comprises a phase shift circuit and a power dividing circuit, and the phase shift network comprises at least two output ports.

10. An antenna, characterized by: comprising a phase shifter according to any one of claims 1 to 9.