Broadband suspended microstrip unequal power divider

Abstract

The utility model provides a broadband suspended microstrip unequal power divider, which relates to the technical field of power dividers and comprises a shell, a circuit board, a radio frequency connector, a main microstrip line, a branch microstrip line, an isolation resistor and a grounding copper plane, the grounding copper plane is connected to the periphery of the circuit board, and a gap is arranged between the grounding copper plane and the circuit board. The radio frequency connector is electrically connected with a gap of the circuit board, a main microstrip line and a branch microstrip line are arranged in the middle of the circuit board, an isolation resistor is arranged between the main microstrip line and the branch microstrip line, the circuit board is fixedly connected in the shell, and the radio frequency connector is located on the side wall of the shell. By adopting a multi-section micro-strip mode, the frequency response width is improved, and the problem of narrow frequency is solved; due to the asymmetric micro-strip design, the branch can obtain different powers by adjusting the width of the branch micro-strip line, and the problem that the symmetric micro-strip design can only realize equal power division is solved; through the connection design of the main path and the branch microstrip, the problem that the coupling mode of the main path and the branch microstrip does not support direct current conduction is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power dividers, and particularly to a broadband suspended microstrip unequal power divider. Background Art

[0002] A power divider is a device that divides the energy of an input signal into two or more output signal energies, and can also combine the energies of multiple signals into one output, and can also be called a combiner at this time. The main technical parameters of the power divider include power loss (including insertion loss, distribution loss and reflection loss), voltage standing wave ratio of each port, isolation degree between power distribution ports, power capacity and frequency band width, etc. In the prior art, a symmetric microstrip design is mainly adopted, which can only achieve equal power division, has a narrow frequency during use, and the microstrip coupling method between the main path and the branch does not support DC conduction.

[0003] After retrieval, a Chinese utility model patent with the patent number CN210430059U discloses a novel low-intermodulation ultra-wideband unequal power divider, which includes a housing, a coupling tube and an inner conductor. Input connectors and direct-through output connectors are respectively arranged at both ends of the housing, and a coupling output connector is arranged on the side wall of the housing; the coupling tube is arranged in the inner cavity of the housing, a medium is filled between the coupling tube and the inner cavity of the housing, both ends of the coupling tube are sealed with the medium, the inner conductor penetrates through the coupling tube and the medium, both ends of the inner conductor are respectively connected to the input connector and the direct-through output connector, and the coupling output connector is connected to one side of the coupling tube. The utility model adopts a re-entrant coupling structure, which has high stability. In addition, by changing the dimensions of the coupling tube and / or the inner conductor, the indexes of different db unequal power dividers can be realized, and at the same time, it has a very wide frequency band range, and has the characteristics of small size, low cost, simple structure, stable intermodulation, convenient manufacturing and good waterproof performance. The above patent does not solve the problem that the symmetric microstrip design can only achieve equal power division. Summary of the Utility Model

[0004] Aiming at the defects in the prior art, the purpose of the utility model is to provide a broadband suspended microstrip unequal power divider.

[0005] According to a broadband suspended microstrip unequal power divider provided by the utility model, it includes: an outer shell, a circuit board, a radio frequency connector, a main path microstrip line, a branch microstrip line, an isolation resistor and a grounding copper plane. The grounding copper plane is connected to the periphery of the circuit board, and there is a gap between the grounding copper plane and the circuit board. The radio frequency connector is electrically connected to the gap of the circuit board. The main path microstrip line and the branch microstrip line are asymmetrically distributed in the middle of the circuit board, and an isolation resistor is arranged between the main path microstrip line and the branch microstrip line. The circuit board is fixedly connected to the inside of the outer shell, and the radio frequency connector is located on the side wall of the outer shell.

[0006] Preferably, the inner walls of the housing are provided with the concave surfaces, and a plurality of bosses distributed in an array are arranged on the concave surfaces, and the bosses are in contact with the circuit board.

[0007] Preferably, the upper planes of the bosses are located in the same plane as the edge plane of the housing.

[0008] Preferably, the plurality of main path microstrip lines and the plurality of branch path microstrip lines are asymmetrically connected respectively, and the main path microstrip lines, the branch path microstrip lines and the ground copper plane are respectively drawn on the circuit board.

[0009] Preferably, the ground reference plane of the ground copper plane is in contact with the housing, and the ground copper plane and the housing form the same ground reference plane.

[0010] Preferably, the RF connector includes a mounting base and a connector. The connector is connected to the mounting base, the connector is electrically connected to the circuit board, a connection hole is provided on the mounting base, and the mounting base is mounted on the outer wall of the housing through the cooperation of the connection hole and an RF connector fixing screw.

[0011] Preferably, the connector is fixed at the central position on one side of the mounting base, and the connector end of the connector extends to the other side of the mounting base, and the connector end is electrically connected at the gap with the circuit board.

[0012] Preferably, the number of RF connectors is three.

[0013] Preferably, the housing includes an upper shell and a lower shell. The upper shell is fixedly connected to the lower shell through an upper and lower shell fixing screw, and concave surfaces are provided on both the upper shell and the lower shell.

[0014] Preferably, mounting holes are provided on both the upper shell, the lower shell and the ground copper plane. The upper and lower shell fixing screw passes through the mounting holes, and the circuit board is fixed between the upper shell and the lower shell through the cooperation of the mounting holes and the upper and lower shell fixing screw.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] This application adopts a multi-section microstrip method, which improves the frequency response width and solves the problem of narrow frequency; and the asymmetric microstrip design can obtain different powers for the branches by adjusting the width of the branch microstrip lines, solving the problem that the symmetric microstrip design can only achieve equal power distribution; through the main path and branch microstrip connection design, the problem that the coupling method of the main path and branch microstrip lines does not support DC conduction is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects and advantages of the utility model will become more apparent:

[0018] Figure 1 is an exploded view of the utility model;

[0019] Figure 2This is the overall structural schematic diagram of the present utility model.

[0020] As shown in the figure: 1. Upper shell; 2. Lower shell; 3. Circuit board; 4. RF connector; 5. Concave surface; 6. Boss; 7. Main path microstrip line; 8. Branch microstrip line; 9. Isolation resistor; 10. Ground copper plane; 11. Upper and lower shell fixing screws; 12. RF connector fixing screws. Detailed implementation mode

[0021] The present utility model will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several changes and improvements can still be made. These all belong to the protection scope of the present utility model.

[0022] Embodiment

[0023] According to a broadband suspended microstrip unequal power divider provided by the present utility model, as Figures 1-2 shown, it includes: a housing, a circuit board 3, an RF connector 4, a main path microstrip line 7, a branch microstrip line 8, an isolation resistor 9, and a ground copper plane 10. The ground copper plane 10 is connected to the periphery of the circuit board 3, and there is a gap between the ground copper plane 10 and the circuit board 3. The RF connector 4 is electrically connected to the gap of the circuit board 3. The main path microstrip line 7 and the branch microstrip line 8 are asymmetrically distributed in the middle of the circuit board 3, and an isolation resistor 9 is provided between the main path microstrip line 7 and the branch microstrip line 8. The circuit board 3 is fixedly connected inside the housing, and the RF connector 4 is located on the side wall of the housing.

[0024] The housing includes an upper shell 1 and a lower shell 2. The upper shell 1 is fixed to the lower shell 2 by upper and lower shell fixing screws 11, and the circuit board 3 is sandwiched between the upper shell 1 and the lower shell 2. The outer shells of the upper shell 1 and the lower shell 2 are both made of metal materials, mainly used for fixing various components and electromagnetic shielding. Mounting holes are provided on the upper shell 1, the lower shell 2, and the ground copper plane 10. The upper and lower shell fixing screws 11 pass through the mounting holes, and the circuit board 3 is fixed between the upper shell 1 and the lower shell 2 through the cooperation of the mounting holes and the upper and lower shell fixing screws 11. Concave surfaces 5 are provided on the inner walls of the upper shell 1 and the lower shell 2 for avoiding components and forming an electromagnetic cavity. A plurality of bosses 6 are arranged in an array on the concave surface 5 for supporting the circuit board 3. The upper plane of the boss 6 and the plane of the outer shell edge need to be in the same plane to keep the circuit board flat.

[0025] The ground reference plane of the grounding copper plane 10 is in contact with the housing, and the grounding copper plane 10 and the housing form the same ground reference plane. The grounding copper plane 10 is drawn around the circuit board 3, and there is a gap between the grounding copper plane 10 and the circuit board 3. The circuit board 3 is preferably a high-frequency circuit board with a low dielectric loss tangent for signal transmission. The centers of the three RF connectors 4 are welded to the circuit board 3, and the RF connectors 4 are fixed to the outer wall of the housing by RF connector fixing screws 12. The RF connector 4 includes a mounting base and a connector. The connector is connected to the mounting base, and the connector is electrically connected to the circuit board 3. The mounting base is provided with a connection hole, and the mounting base is mounted on the outer wall of the housing through the cooperation of the connection hole and the RF connector fixing screw 12. The connector is fixed at the center position on one side of the mounting base, and the connector end of the connector extends to the other side of the mounting base, and the connector end is electrically connected to the circuit board 3 at the gap.

[0026] A plurality of main path microstrip lines 7 and a plurality of branch path microstrip lines 8 are asymmetrically connected respectively, and the main path microstrip lines 7, the branch path microstrip lines 8 and the grounding copper plane 10 are respectively drawn on the circuit board 3. The isolation resistors 9 are welded to the circuit board 3. There is an isolation resistor 9 between the main path microstrip line 7 and the branch path microstrip line 8, and one isolation resistor 9 is provided for each section of the microstrip line, which improves the RF signal isolation degree between the main path output and the branch path output. The main path microstrip line 7 is used for the transmission of main path DC and RF signals. It adopts a multi-section design, which can increase the frequency response width. The scheme preferably has 4 sections, but is not limited to 4 sections. The branch path microstrip line 8 is mainly used for the transmission of branch path DC and RF signals. It adopts a multi-section design, which can increase the frequency response width. The scheme preferably has 4 sections, but is not limited to 4 sections.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0028] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. A broadband suspended microstrip unequal power divider, characterized in that: include: A housing, a circuit board (3), a radio frequency connector (4), a main microstrip line (7), a branch microstrip line (8), an isolation resistor (9) and a grounding copper plane (10), wherein the grounding copper plane (10) is connected to the periphery of the circuit board (3), a gap is provided between the grounding copper plane (10) and the circuit board (3), the radio frequency connector (4) is electrically connected to the circuit board (3) at the gap, the main microstrip line (7) and the branch microstrip line (8) are asymmetrically distributed in the middle of the circuit board (3), and the isolation resistor (9) is provided between the main microstrip line (7) and the branch microstrip line (8), the circuit board (3) is fixedly connected to the inside of the housing, and the radio frequency connector (4) is located on the side wall of the housing.

2. The broadband suspended microstrip unequal power divider according to claim 1, characterized in that: The inner wall of the shell is provided with the concave surface (5), and the concave surface (5) is provided with a plurality of bosses (6) distributed in an array, and the bosses (6) are in contact with the circuit board (3).

3. The broadband suspended microstrip unequal power divider according to claim 2, characterized in that: The upper plane of the boss (6) and the edge plane of the shell are located in the same plane.

4. The broadband suspended microstrip unequal power divider according to claim 1, characterized in that: The plurality of main microstrip lines (7) and the plurality of branch microstrip lines (8) are respectively connected asymmetrically, and the main microstrip lines (7), the branch microstrip lines (8) and the grounding copper plane (10) are respectively drawn on the circuit board (3).

5. The broadband suspended microstrip unequal power divider according to claim 1, characterized in that: The ground reference plane of the grounding copper plane (10) contacts the shell, and the grounding copper plane (10) and the shell form the same ground reference plane.

6. The broadband suspended microstrip unequal power divider according to claim 1, characterized in that: The radio frequency connector (4) comprises a mounting seat and a connector, wherein the connector is connected to the mounting seat, and the connector is electrically connected to the circuit board (3). The mounting seat is provided with a connection hole, and the mounting seat is mounted on the outer wall of the housing through the cooperation of the connection hole and the radio frequency connector fixing screw (12).

7. The broadband suspended microstrip unequal power divider according to claim 6, characterized in that: The connector is fixed at the center position of one side of the mounting seat, and the connector end of the connector extends to the other side of the mounting seat, and the connector end is electrically connected to the gap of the circuit board (3).

8. The broadband suspended microstrip unequal power divider according to claim 1, characterized in that: The number of the radio frequency connectors (4) is three.

9. The broadband suspended microstrip unequal power divider according to claim 2, characterized in that: The outer shell comprises an upper shell (1) and a lower shell (2); the upper shell (1) is fixedly connected to the lower shell (2) by upper and lower shell fixing screws (11); and the concave surface (5) is provided on both the upper shell (1) and the lower shell (2).

10. The broadband suspended microstrip unequal power divider according to claim 9, characterized in that: The upper shell (1), the lower shell (2) and the grounding copper plane (10) are all provided with mounting holes, the upper and lower shell fixing screws (11) pass through the mounting holes, and the circuit board (3) is fixed between the upper shell (1) and the lower shell (2) through the cooperation between the mounting holes and the upper and lower shell fixing screws (11).

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