CN210926261U

CN210926261U - Microwave device and antenna

Info

Publication number: CN210926261U
Application number: CN201922442978.4U
Authority: CN
Inventors: 贾飞飞; 苏国生; 王强; 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: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-07-03
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a microwave device and antenna, wherein, the microwave device includes the cavity, be equipped with in the cavity with the multilayer dielectric structure of two-layer cavity about the cavity is separated and is formed, multilayer dielectric structure include two piece at least dielectric substrate and with the middle ground plane that the cavity electricity is connected all is equipped with the microwave network in upper cavity and the lower floor's cavity, and the microwave network of two-layer cavity about and all with middle ground plane is connected, makes two independent stripline structures are with transmission signal about the microwave network in cavity, multilayer dielectric structure and the upper and lower two-layer cavity forms. The strip line structure is formed by the cavity, the multilayer dielectric structure and the microwave network between the cavity side wall and the multilayer dielectric structure, so that signal transmission is realized, the structure is simple, the complexity of an antenna feed network is reduced, the phase shift consistency is good, and the index stability of the antenna is favorably improved.

Description

Microwave device and antenna

Technical Field

The utility model relates to a mobile communication field especially relates to a microwave device and antenna.

Background

At present, with the continuous introduction of new standards and new frequency spectrums, mobile operators are forced to seek antenna devices capable of supporting more frequency spectrums. Using the combining/duplexing technique, i.e. introducing a frequency division combiner (also called duplexer) in a wideband antenna array, the wideband antenna can be divided into two narrow bands, so as to introduce more ports.

However, when the combined crossover antenna needs independent electrical tuning, each phase shifter output port needs to introduce a combiner, so that the antenna feed network is increasingly complex, the producibility is reduced, and the cost is increased. In order to solve the problem, different combiner and phase shifter integration technologies are introduced in a plurality of patents, but the various patents have the defects of complex structure, potential hazards in consistency and producibility of the phase shifter and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure, integrated have multi-functional microwave device.

The utility model aims at providing an antenna including above-mentioned microwave device.

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

as a first aspect, the utility model relates to a microwave device, which comprises a cavity, be equipped with in the cavity with the multilayer dielectric structure of two-layer cavity about the cavity partition forms, multilayer dielectric structure include two piece at least medium base plates and with the middle ground plane that the cavity electricity is connected all is equipped with the microwave network in upper cavity and the lower floor's cavity, and the microwave network of two-layer cavity about and all with the middle ground plane is connected, makes two independent stripline structures are in order to transmit signal about the microwave network in cavity, multilayer dielectric structure and the upper and lower two-layer cavity forms.

Further setting: and the dielectric substrate is provided with a metal through hole for connecting a metal ground of the microwave network and the middle ground layer.

Further setting: and the multilayer medium structure is provided with a metal connecting piece used for connecting a metal ground of the microwave network and the cavity.

Further setting: and a window is formed in the cavity corresponding to the metal connecting piece.

Further setting: the microwave networks of the upper cavity and the lower cavity respectively comprise a first phase-shifting network and a second phase-shifting network, and movable dielectric plates capable of moving along the length direction of the cavities are arranged on one sides, far away from the multilayer dielectric structure, of the upper cavity and the lower cavity.

Further setting: the first phase-shifting network and the second phase-shifting network have different working frequency bands, and an output port of the second phase-shifting network is connected with an output port of the first phase-shifting network through a metal through hole penetrating through the multilayer dielectric structure to form a combined port.

Further setting: the output port of the first phase-shifting network is connected with a first filter network; and the output port of the second phase shifting network is connected with the second phase shifting network.

Further setting: the input port of the first phase shifting network, the input port of the second phase shifting network and the combining port are positioned on the same side of the cavity in the width direction.

Further setting: and the side wall of the cavity is provided with windows corresponding to the input port of the first phase-shifting network, the input port of the second phase-shifting network and the combining port.

As a second aspect, the present invention relates to an antenna comprising a microwave device as described above.

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

1. in the microwave device of the present invention, a strip line structure is formed by the cavity, the multilayer dielectric structure and the microwave network located between the side wall of the cavity and the multilayer dielectric structure, so as to realize the transmission of signals; simultaneously through setting up metal through-hole at multilayer dielectric structure to make the output port of first microwave network and second microwave network be connected to same combination port department, thereby reach the effect of combining, make the utility model discloses a can integrate simultaneously in the cavity and shift the phase and combine the function, and simple structure reduces the complexity of antenna feed network, and it is good to shift the phase uniformity, avoids shifting mutual interference between the phase signal, has promoted the index stability of microwave device greatly.

2. The utility model discloses an among the microwave device, through set up the window on the cavity to welding between the welding of metal connecting piece and cavity and the input port of microwave network and the combination port and the transmission cable, the production operation is simple and easy, can improve production efficiency by a wide margin.

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 an embodiment of a microwave device according to the present invention;

fig. 2 is a schematic front view of an embodiment of the microwave device of the present invention;

fig. 3 is a schematic diagram illustrating a first microwave network according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a second microwave network according to an embodiment of the present invention.

In the figure, 1, a cavity; 11. mounting grooves; 12. a window; 13. a containing groove; 2. a multi-layer dielectric structure; 21. a dielectric substrate; 211. a metal via; 212. a metal via; 22. a middle ground plane; 23. a metal connecting member; 31. a first phase shifting network; 311. a first input port; 32. a first filter network; 34; a second phase shifting network; 341. a second input port; 35. a second filter network; 36. a combining port; 37. a movable dielectric plate.

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.

Referring to fig. 1 to 4, the present invention relates to a microwave device, and more particularly, to a microwave device with a phase shifter and a combiner integrated in a same cavity, which has a simple and reliable structure and high producibility.

Referring to fig. 1, the microwave device includes a cavity 1 and a multi-layer dielectric structure 2, the multi-layer dielectric structure 2 extends along a length direction of the cavity 1 and separates the cavity 1 into an upper sub-cavity and a lower sub-cavity 1, microwave networks are respectively arranged in the upper-layer sub-cavity 1 and the lower-layer sub-cavity 1, in addition, the multilayer dielectric structure 2 comprises at least two dielectric substrates 21 and a middle grounding layer 22, the middle grounding layer 22 is electrically connected with the cavity 1, while the metal grounds of the microwave networks in the upper sub-cavity 1 and the lower sub-cavity 1 are also connected to the intermediate ground plane 22, therefore, the upper and lower side walls of the cavity 1, the multilayer medium structure 2 and the microwave networks in the upper and lower sub-cavities 1 can form an upper and lower independent strip line structure, so that signal transmission is realized, and normal operation of the microwave device is ensured.

Preferably, the multilayer dielectric structure 2 in this embodiment includes two dielectric substrates 21, the middle metal layer is located between the two dielectric substrates 21, and the microwave network in this embodiment is etched on one side of the two dielectric substrates 21 away from the middle metal layer by using an etching method, and the microwave network located in the upper sub-cavity 1 is defined as a first microwave network, and the microwave network located in the lower sub-cavity 1 is defined as a second microwave network.

Further, referring to fig. 3 and 4, two dielectric substrates 21 are provided with a metal ground structure at the position of the non-signal transmission network, respectively serving as a metal ground of the first microwave network or the second microwave network, and a metal via 211 is formed at a position on the dielectric substrate 21 corresponding to the metal ground structure, so that the metal ground structure is connected to the middle metal layer of the multilayer dielectric structure 2 through the metal via 211, and a metal connector 23 is provided at a position on each dielectric substrate 21 corresponding to the metal ground structure, and the metal connector 23 is used for being welded to the cavity 1, so as to electrically connect the metal ground of the first microwave network and the second microwave network to the cavity 1, thereby realizing that the first microwave network or the second microwave network forms a strip line structure with the multilayer dielectric structure 2 and the sidewall of the cavity 1, to enable transmission of wider band signals.

Further, the metal is close to the side edge of the width direction of the medium substrate 21, and the metal piece is arranged on the side edge of the medium substrate 21, so that the window 12 is formed in the position, corresponding to the metal connecting piece 23, of the side edge of the upper side wall and the lower side wall of the cavity 1, welding operation of workers is facilitated, and production difficulty is reduced.

Said first and second microwave networks each comprise a phase shifting network, and are respectively defined as a first phase shifting network 31 and a second phase shifting network 34, the first phase shifting network 31 and the second phase shifting network 34 correspond to different operating frequency bands respectively, and the movable dielectric plates 37 which can move along the length direction of the cavity 1 are arranged on the sides of the microwave networks corresponding to the upper cavity 1 and the lower cavity 1 far away from the multilayer dielectric structure 2, the end of the movable medium plate 37 is connected with a transmission mechanism (not shown, the same applies below) located in the cavity 1, so as to push and pull the movable medium plate 37 to reciprocate in the corresponding sub-cavity 1 through the transmission mechanism 371, thus, by moving the movable dielectric plate 37, the equivalent dielectric constant of the dielectric in the strip line structure can be covered, and the effect of changing the phase shift can be achieved.

In addition, the first phase shifting network 31 and the second phase shifting network 34 are both provided with an input port and an output port, meanwhile, a combining port 36 is further etched on the dielectric substrate 21 of the first phase shifting network 31, and the output port of the second phase shifting network 34 can be led to one side of the multilayer dielectric structure 2, where the first phase shifting network 31 is arranged, through the output port of the second phase shifting network 34, through the metal through hole 212 of the multilayer dielectric structure 2, and then is connected with the combining port 36, so that a uniform output port can be formed, and the effect of combining and phase shifting can be achieved.

Preferably, two combining ports 36 are provided in the present embodiment, and two combining ports 36 are simultaneously connected to the output ports of the first phase shifting network 31 and the second phase shifting network 34, and transmit signals to each radiation unit through the combining ports 36.

Further, an output port of the first phase shifting network 31 is connected to a first filter network 32, and the first filter network 32 can pass through a signal of a working frequency band corresponding to the first phase shifting network 31 and suppress a signal of a working frequency band corresponding to the second phase shifting network 34, so that an output signal of the first phase shifting network 31 passes through the first filter network 32 and then is transmitted to the combining port 36, so as to remove a clutter signal of the first microwave network signal.

The output port of the second phase shift network 34 is also connected to a second microwave network, and the second filter network 35 can pass through the signal of the working frequency band corresponding to the second phase shift microwave and suppress the signal of the working frequency band corresponding to the first phase shift network 31, so as to achieve the purpose of filtering the clutter signal of the second microwave network signal.

Preferably, the input port of the first phase shifting network 31, the input port of the second phase shifting network 34, and the combining port 36 are all disposed on the same side of the dielectric substrate 21, that is, only one side of the cavity 1 needs to be disposed with a cable slot to satisfy signal transmission. It is further preferable that the input port of the first phase shifting network 31 is located above the multilayer dielectric structure 2, and the input port of the second phase shifting network 34 is located below the multilayer dielectric structure 2, so as to avoid interference between signals.

Meanwhile, please refer to fig. 2, the cavity 1 is provided with windows 12 corresponding to the input port of the first phase shifting network 31, the input port of the second phase shifting network 34, and the combining port 36, so as to facilitate welding between the transmission cable and the ports, thereby achieving the purpose of reducing the production difficulty.

In addition, the dielectric substrate 21 of the multilayer dielectric structure 2 can be made of insulating materials such as plastics, ceramics, high-frequency circuit boards and the like, the cavity 1 can be integrally formed by metal injection molding, and two side faces of the cavity 1 in the width direction are also provided with accommodating grooves 13 for accommodating transmission cables.

The microwave device of the present invention forms a strip line structure by the cavity 1, the multi-layer medium structure 2 and the microwave network between the side wall of the cavity 1 and the multi-layer medium structure 2 to realize the transmission of signals, and changes the equivalent dielectric constant of the medium in the strip line structure by moving the movable medium plate 37 in the cavity 1 to achieve the phase shift effect; simultaneously through setting up metal through-hole 212 at multilayer dielectric structure 2 to make the output port of first microwave network and second microwave network be connected to same way port 36 department of closing, thereby reach the effect of closing, make the utility model discloses a cavity 1 in can be integrated simultaneously have the function of shifting the phase and closing, and simple structure reduces the complexity of antenna feed network, and the phase-shifting uniformity is good, avoids shifting the mutual interference between the signal, has promoted the index stability of microwave device greatly.

In addition, the window 12 is formed in the cavity 1, so that the metal connecting piece 23 and the cavity 1 can be welded conveniently, the input port and the combining port 36 of the microwave network can be welded conveniently with a transmission cable, the production operation is simple, and the production efficiency can be greatly improved.

The utility model discloses still relate to an antenna, it includes as before the microwave device, the microwave device can be in same cavity integrated phase shift and combine two kinds of functions, and simple structure is favorable to realizing the miniaturization of antenna and promoting the holistic production efficiency of antenna.

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. A microwave device comprises a cavity body and is characterized in that: the microwave transmission cavity comprises a cavity body, wherein a plurality of layers of dielectric structures are arranged in the cavity body and divide the cavity body into an upper layer cavity body and a lower layer cavity body, each layer of dielectric structure comprises at least two dielectric substrates and a middle grounding layer electrically connected with the cavity body, microwave networks are arranged in the upper layer cavity body and the lower layer cavity body, and the metal grounds of the microwave networks of the upper layer cavity body and the lower layer cavity body are connected with the middle grounding layer, so that the cavity body, the plurality of layers of dielectric structures and the microwave networks in the upper layer cavity body and the lower layer cavity body form an upper.

2. The microwave device of claim 1, characterized by: and the dielectric substrate is provided with a metal through hole for connecting a metal ground of the microwave network and the middle ground layer.

3. The microwave device of claim 1, characterized by: and the multilayer medium structure is provided with a metal connecting piece used for connecting a metal ground of the microwave network and the cavity.

4. The microwave device of claim 3, characterized in that: and a window is formed in the cavity corresponding to the metal connecting piece.

5. The microwave device of claim 1, characterized by: the microwave networks of the upper cavity and the lower cavity respectively comprise a first phase-shifting network and a second phase-shifting network, and movable dielectric plates capable of moving along the length direction of the cavities are arranged on one sides, far away from the multilayer dielectric structure, of the upper cavity and the lower cavity.

6. The microwave device of claim 5, characterized by: the first phase-shifting network and the second phase-shifting network have different working frequency bands, and an output port of the second phase-shifting network is connected with an output port of the first phase-shifting network through a metal through hole penetrating through the multilayer dielectric structure to form a combined port.

7. The microwave device of claim 6, characterized by: the output port of the first phase-shifting network is connected with a first filter network; and the output port of the second phase shifting network is connected with the second phase shifting network.

8. The microwave device of claim 6, characterized by: the input port of the first phase shifting network, the input port of the second phase shifting network and the combining port are positioned on the same side of the cavity in the width direction.

9. The microwave device of claim 8, characterized by: and the side wall of the cavity is provided with windows corresponding to the input port of the first phase-shifting network, the input port of the second phase-shifting network and the combining port.

10. An antenna, characterized by: comprising the microwave device according to any one of the claims 1-9.