Wide-frequency-band high-power 3dB bridge device

Abstract

The utility model discloses a wide-frequency-band high-power 3dB bridge device, which belongs to the technical field of communication and comprises an upper-layer metal strip line and a lower-layer metal strip line, an intermediate insulating medium layer is arranged between the upper-layer metal strip line and the lower-layer metal strip line, and the intermediate insulating medium layer is arranged between the upper-layer metal strip line and the lower-layer metal strip line. An upper insulating medium layer is arranged above the upper layer metal strip line, a lower insulating medium layer is arranged below the lower layer metal strip line, and the upper insulating medium layer, the upper layer metal strip line, the middle insulating medium layer, the lower layer metal strip line and the lower insulating medium layer are integrally packaged in a cavity formed by the shell and the sealing cover. The structure of the cover plate and the shell can effectively reduce the volume of the cavity, so that the standing wave is improved, the weight of the device can be reduced, and the use effect is better; a middle insulating dielectric layer is arranged between the upper metal strip line and the lower metal strip line, the upper metal strip line and the lower metal strip line are highly isolated, and bridge coupling is effectively enhanced through the middle insulating dielectric layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication, and in particular relates to a wide-band high-power 3dB bridge device. Background Art

[0002] 3dB bridge, also called frequency combiner, is a commonly used passive device in communication systems, especially in RF and microwave circuits and systems. It can continuously sample the transmission power along a certain direction of the transmission line and can divide an input signal into two signals with equal amplitude and 90 degrees phase difference. 3dB bridge plays an important role in combining base station signals in indoor coverage systems. It is mainly used for combining multiple signals to improve the utilization rate of output signals.

[0003] There are many types of 3dB bridges on the market, but they all have certain application drawbacks. For example, there are planar microstrip double-arm bridges with narrow frequency bandwidth; there are multi-layer laminated coupled bridges with very small power capacity. At the same time, some bridges have large internal cavities and serious standing wave problems. Therefore, it is very necessary to design a 3dB bridge with wide frequency band, high isolation, good standing wave and large power capacity (greater than 3000W). Utility Model Content

[0004] The utility model aims to provide a wide-band high-power 3dB bridge device to solve the problems of the existing 3dB bridge in the use process mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wide-band high-power 3dB bridge device, comprising an upper metal strip line and a lower metal strip line, an intermediate insulating dielectric layer is arranged between the upper metal strip line and the lower metal strip line, an upper insulating dielectric layer is installed above the upper metal strip line, and a lower insulating dielectric layer is installed below the lower metal strip line, the upper insulating dielectric layer, the upper metal strip line, the intermediate insulating dielectric layer, the lower metal strip line and the lower insulating dielectric layer are integrally encapsulated in a cavity formed by a shell and a cover, and two sets of radio frequency connectors are welded on both sides of the upper metal strip line and the lower metal strip line.

[0006] Preferably, the two groups of RF connectors connected by the upper metal strip line are respectively a bridge signal input port and a first signal output port, and the two groups of RF connectors connected by the lower metal strip line are respectively an isolation port and a second signal output port.

[0007] Preferably, the relative phase of the output of the first signal output port is 0 degrees, and the relative phase of the output of the second signal output port is 90 degrees.

[0008] Preferably, the bridge signal input port and the first signal output port are at the same horizontal plane, and the isolation port and the second signal output port are at the same horizontal plane.

[0009] Preferably, the upper metal strip wire and the lower metal strip wire are both bent and transformed multiple times, and limit buckles are correspondingly provided on the upper insulating medium layer and the lower insulating medium layer.

[0010] Preferably, the cover plate is provided with an upper insulating medium impedance transformation groove symmetrically to a vertical plane at the center of the upper metal strip line arm width surface, and the shell is provided with a lower insulating medium impedance transformation groove symmetrically to a vertical plane at the center of the lower metal strip line arm width surface.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The structure of the cover plate and the shell can effectively reduce the volume of the cavity, thereby improving the standing wave, and at the same time can reduce the weight of the device, and the use effect is better; the lower insulating medium changes the height to change the width of the upper metal strip line and the lower metal strip line, and the distance between the upper metal strip line and the lower metal strip line is increased through the intermediate insulating medium layer. The interaction of these structures realizes high power, and the maximum power capacity can reach 3000W; an intermediate insulating medium layer is set between the upper metal strip line and the lower metal strip line, the upper metal strip line and the lower metal strip line are highly isolated, and the bridge coupling is effectively strengthened through the intermediate insulating medium layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the explosion structure of the utility model.

[0014] In the figure: 1. Shell; 2. Lower insulating dielectric layer; 3. Lower metal strip wire; 4. Middle insulating dielectric layer; 5. Upper metal strip wire sheet; 6. Upper insulating dielectric layer; 7. Cover plate; 8. RF connector. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Reference Figure 1A wide-band high-power 3dB bridge device comprises an upper metal strip line 5 and a lower metal strip line 3, an intermediate insulating dielectric layer 4 is arranged between the upper metal strip line 5 and the lower metal strip line 3, an upper insulating dielectric layer 6 is installed above the upper metal strip line 5, and a lower insulating dielectric layer 2 is installed below the lower metal strip line 3. The upper insulating dielectric layer 6, the upper metal strip line 5, the intermediate insulating dielectric layer 4, the lower metal strip line 3 and the lower insulating dielectric layer 2 are integrally packaged in a cavity formed by a shell 1 and a cover, and two sets of radio frequency connectors 8 are welded on both sides of the upper metal strip line 5 and the lower metal strip line 3.

[0017] Through this technical solution, the upper metal strip line 5 and the lower metal strip line 3 are installed through the upper insulating dielectric layer 6 and the lower insulating dielectric layer 2 respectively. The upper insulating dielectric layer 6 and the lower insulating dielectric layer 2 cooperate with the cover plate 7 and the shell 1 to effectively reduce the volume of the cavity, thereby improving the standing wave and enhancing the use effect; an intermediate insulating dielectric layer 4 is arranged between the upper metal strip line 5 and the lower metal strip line 3, and the upper metal strip line 5 and the lower metal strip line 3 are highly isolated, and the bridge coupling is effectively strengthened by the intermediate insulating dielectric layer 4; the width of the upper metal strip line 5 and the lower metal strip line 3 is changed by changing the height of the cover plate 7, the cavity, the upper insulating dielectric, and the lower insulating dielectric, and the distance between the upper metal strip line 5 and the lower metal strip line 3 is increased by the intermediate insulating dielectric layer 4. The interaction of these structures realizes high power, and the maximum power capacity can reach 3000W.

[0018] Furthermore, the two groups of RF connectors 8 connected to the upper metal strip line 5 are respectively the bridge signal input port and the first signal output port, and the two groups of RF connectors 8 connected to the lower metal strip line 3 are respectively the isolation port and the second signal output port.

[0019] Four groups of RF interfaces are provided, two groups of RF interfaces are actually welded to the upper metal strip line 5 , and the other two groups of RF interfaces are welded to the lower metal strip line 3 .

[0020] Further, the relative phase of the output of the first signal output port is 0 degrees, and the relative phase of the output of the second signal output port is 90 degrees.

[0021] Further, the bridge signal input port and the first signal output port are at the same horizontal plane, and the isolation port and the second signal output port are at the same horizontal plane.

[0022] Through this technical solution, the height difference between the bridge signal input port and the isolation port is consistent with the height difference between the first signal output port and the second signal output port.

[0023] Furthermore, the upper metal strip line 5 and the lower metal strip line 3 are both bent and transformed for multiple times, and the upper insulating medium layer 6 and the lower insulating medium layer 2 are provided with limit buckles correspondingly.

[0024] In this solution, by bending the upper metal strip line 5 and the lower metal strip line 3 and changing the width of the metal strip line, ultra-wideband is achieved through impedance transformation, and the relative bandwidth can reach more than 100%.

[0025] Furthermore, the cover plate 7 is provided with an upper insulating dielectric layer impedance transformation groove symmetrically about the center vertical plane of the arm width surface of the upper metal strip line 5, and the housing 1 is provided with a lower insulating dielectric layer impedance transformation groove symmetrically about the center vertical plane of the arm width surface of the lower metal strip line 3.

[0026] The impedance transformation grooves on the cover plate 7 are arranged at both ends of the cover plate 7, and the impedance transformation grooves are adapted to the insulating medium layer; the impedance transformation grooves on the shell 1 (not shown in the figure) are arranged at both ends of the bottom plate of the shell 1, and the impedance transformation grooves are adapted to the lower insulating medium layer. The structure of the cover plate 7 and the shell 1 can effectively reduce the volume of the cavity, thereby improving the standing wave, and at the same time can reduce the weight of the device, and the use effect is better.

[0027] Working principle: the upper metal strip line 5 and the lower metal strip line 3 are installed through the upper insulating dielectric layer 6 and the lower insulating dielectric layer 2 respectively. The upper insulating dielectric layer 6 and the lower insulating dielectric layer 2 cooperate with the cover plate 7 and the shell 1 to effectively reduce the volume of the cavity, thereby improving the standing wave and enhancing the use effect; an intermediate insulating dielectric layer 4 is arranged between the upper metal strip line 5 and the lower metal strip line 3, and the upper metal strip line 5 and the lower metal strip line 3 are highly isolated, and the bridge coupling is effectively strengthened by the intermediate insulating dielectric layer 4; the width of the upper metal strip line 5 and the lower metal strip line 3 is changed by changing the height of the cover plate 7, the cavity, the upper insulating dielectric, and the lower insulating dielectric, and the distance between the upper metal strip line 5 and the lower metal strip line 3 is increased by the intermediate insulating dielectric layer 4, and the interaction of these structures achieves high power.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wide-band high-power 3dB bridge device, characterized in that: It comprises an upper metal strip line and a lower metal strip line, an intermediate insulating dielectric layer is arranged between the upper metal strip line and the lower metal strip line, an upper insulating dielectric layer is installed above the upper metal strip line, and a lower insulating dielectric layer is installed below the lower metal strip line, the upper insulating dielectric layer, the upper metal strip line, the intermediate insulating dielectric layer, the lower metal strip line and the lower insulating dielectric layer are integrally packaged in a cavity formed by a shell and a cover plate, and two sets of radio frequency connectors are welded on both sides of the upper metal strip line and the lower metal strip line.

2. A wide-band high-power 3dB bridge device according to claim 1, characterized in that: The two groups of RF connectors connected by the upper metal strip line are respectively a bridge signal input port and a first signal output port, and the two groups of RF connectors connected by the lower metal strip line are respectively an isolation port and a second signal output port.

3. A wide-band high-power 3dB bridge device according to claim 2, characterized in that: The relative phase of the output of the first signal output port is 0 degrees, and the relative phase of the output of the second signal output port is 90 degrees.

4. A wide-band high-power 3dB bridge device according to claim 2, characterized in that: The bridge signal input port and the first signal output port are located at the same level, and the isolation port and the second signal output port are located at the same level.

5. A wide-band high-power 3dB bridge device according to claim 1, characterized in that: The upper metal strip wire and the lower metal strip wire are both bent and transformed for multiple times, and the upper insulating medium layer and the lower insulating medium layer are correspondingly provided with limited position buckles.

6. A wide-band high-power 3dB bridge device according to claim 1, characterized in that: Two groups of upper insulating medium impedance transformation slots are symmetrically arranged on the top surface of the cover plate, and two groups of lower insulating medium impedance transformation slots are symmetrically arranged on the bottom surface of the shell.

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