CN218997039U - L wave band integration single-cavity structure filtering coupling assembly - Google Patents

Abstract

The utility model provides an L-band integrated single-cavity structure filtering coupling assembly, which relates to the technical field of electronics and comprises a filter and a power division coupler, wherein the filter is formed by an integrated structure, a passband inside the filter is combined with two ports, one port extends to the outside of the filter to form a radio frequency input end, the other port is connected to the power division coupler, the filter comprises a cavity, a plurality of independent split type resonant columns are arranged in the cavity and are provided with hollow structures, the resonant columns are mutually connected in series through tap lines, the end of each tap line is connected with a microstrip needle, one microstrip needle is connected with the radio frequency input end, the other microstrip needle is connected with the power division coupler through a microstrip connecting plate, a resonant cavity is formed between the two resonant columns, and tuning screws are arranged on the resonant columns.

Description

L wave band integration single-cavity structure filtering coupling assembly

Technical Field

The utility model relates to the technical field of L-band airborne electronics, in particular to an L-band integrated single-cavity structure filtering coupling assembly.

Background

In the process of integrating electronic devices, the structure is complicated in processing due to the overlarge volume, so that the miniaturization of the devices is particularly important. In the radar transmitting and antenna feeding system, huge cost and resources are consumed to amplify signals to kilowatt level, the loss is more than 3dB in the transmission process of the feeder line from the transmitter to the radar antenna, and half of energy is dissipated on the feeder line, so that the detection distance of the radar is greatly reduced, the miniaturization of devices is ensured, and the feeder line loss is reduced to the greatest extent. The coupler and the filter play an important role in the system, and in the past, the coupler and the filter generally adopt a split type or embedded type connection mode, so that the size of the device is large and the grounding performance is poor.

Therefore, in order to miniaturize the device, an integrated structural design may be selected for the filter and the coupler. In the prior art, when the filter and the coupler are designed in an integrated structure, the structure of the filter generally adopts two cavities, and in order to miniaturize the device, the design of adopting one cavity can be considered, but how to make the structure of the filter in the system adopt the design of one cavity can also ensure that other performance indexes of the system are maintained well.

Disclosure of Invention

The utility model aims to provide an L-band integrated single-cavity structure filtering coupling component, which adopts an integrated design structure of a filter and a coupler, adopts a cavity design of the filter structure, reduces the volume of devices, solves the problems of large volume, poor grounding performance and larger signal leakage caused by the adoption of a split type and embedded type connection mode of the two devices in the past, and meets the requirements of large power capacity and strong shock resistance under a 15000 m low-pressure environment.

In order to solve the technical problems, the utility model adopts the following scheme:

an L-band integrated single-cavity structure filtering coupling assembly comprises an integrated filter and a power division coupler, wherein one passband inside the filter is combined with two ports, one port extends to the outside of the filter to form a radio frequency input end, the other port is connected to the power division coupler,

the filter comprises a cavity, a plurality of independent split type resonant columns are arranged in the cavity, the resonant columns are of hollow structures, the resonant columns are connected in series through tap lines, the end head of each tap line is connected with a microstrip needle, one microstrip needle is connected with a radio frequency input end, the other microstrip needle is connected with a power division coupler through a microstrip connecting plate, a resonant cavity is formed between the two resonant columns, and tuning screws are arranged on the resonant columns.

Further, the power division coupler comprises a main line and a secondary line, the main line comprises a first end and a second end, the microstrip needle of the filter is connected to the first end through a microstrip connection plate, the second end is connected with the signal output end, the secondary line comprises a third end, a fourth end and a fifth end, the sum of the power of the third end and the power of the fourth end is equal to the power of the fifth end, and the third end, the fourth end and the fifth end are all coupling ports.

Furthermore, the filter is also connected with a sealing cover plate meeting the low air pressure of 15000 meters in height through laser seal welding.

Furthermore, the power division coupler further comprises a printed circuit board and a coupler cover plate, the main line and the auxiliary line are arranged on the upper surface of the printed circuit board, a lining plate is further arranged above the main line and the auxiliary line, and the printed circuit board is fixedly connected with the lining plate through the coupler cover plate by screws.

Furthermore, the main line and the auxiliary line are designed by adopting a strip line structure.

Further, a filter cover plate is connected to the filter through screws.

Further, the filter and the power division coupler are made of aluminum alloy.

Further, the resonant column in the cavity is cylindrical.

The utility model has the beneficial effects that:

the utility model provides an L-band integrated single-cavity structure filtering coupling component, which adopts an integrated design structure of a filter and a coupler, has reasonable structure, greatly improves the power capacity and the reliability of the filtering coupling component, and solves the problems of larger volume, signal leakage and smaller power caused by the adoption of a split type microstrip embedded connection mode for two devices in the past.

The structural design of the filter adopts a cavity, so that the device is miniaturized and the volume of the device is reduced on the premise of ensuring other performances of the system.

The filter is also connected with a sealing cover plate meeting low air pressure through laser seal welding, so that the system performance is not affected in the low air pressure, and the filter meets the requirements of large power capacity and strong shock resistance in a 15000-meter low air pressure environment.

Drawings

FIG. 1 is a schematic diagram of the product structure of the present utility model;

FIG. 2 is a schematic elevational view of the present utility model;

FIG. 3 is a schematic view of a horizontal cross-sectional structure of the present utility model;

FIG. 4 is a schematic cross-sectional view of the present utility model;

reference numerals illustrate: 1-filter, 2-power division coupler, 3-coupler cover plate, 4-printed circuit board, 5-first end, 6-second end, 7-third end, 8-fourth end, 9-fifth end, 10-SAM connector, 11-liner plate, 12-cavity, 13-sealed cover plate, 14-resonant column, 15-tap line, 16-microstrip needle, 17-microstrip connection plate, 18-tuning screw, 19-filter cover plate, 20-resonant cavity, 21-radio frequency input end, 22-signal output end.

Detailed Description

In order that those skilled in the art will better understand the technical scheme of the present utility model, the following further details the present utility model with reference to the accompanying drawings and detailed description, but the embodiments of the present utility model are not limited thereto.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "configured," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model is described in detail below by reference to the attached drawings and in connection with the embodiments:

example 1

As shown IN fig. 1, fig. 2, fig. 3, and fig. 4, an L-band integrated single-cavity structure filtering coupling assembly includes a filter 1 and a power division coupler 2, which are integrally formed, a passband inside the filter 1 is combined to form two ports, one port extends to the outside of the filter 1 to form a radio frequency input end 21 (IN), the power division coupler 2 includes a main line and a secondary line, the main line includes a first end 5 and a second end 6, the other port of the filter 1 is connected to the first end 5, the second end 6 is connected to a signal output end 22 (OUT), the signal output end 22 is connected to a SAM connector 10, the secondary line includes a third end 7, a fourth end 8, and a fifth end 9, a sum of powers of the third end 7 and the fourth end 8 is equal to a power of the fifth end 9, and the third end 7, the fourth end 8, and the fifth end 9 are coupling ports.

The third end 7, the fourth end 8 and the fifth end 9 are respectively corresponding to CP1, CP2 and CP3, the three coupling ports are all connected with the SAM connector 10, the third end 7 and the fourth end 8 are respectively coupling ports from the radio frequency input end 21 to CP1 and CP2, and the fifth end 9 is a coupling port from the signal output end 22 to CP 3.

Specifically, the filter 1 includes a cavity 12, a plurality of independent split resonant columns 14 are disposed in the cavity 12, the resonant columns 14 have a hollow structure, the resonant columns 14 are connected in series with each other through a tap line 15, the end of the tap line 15 is connected with a microstrip needle 16, one microstrip needle 16 is connected with a radio frequency input end 21, the other microstrip needle 16 is connected with the first end 5 through a microstrip connection plate 17, a resonant cavity 20 is formed between the two resonant columns 14, and the resonant columns 14 are provided with tuning screws 18.

The structure of the cavity 12 is designed by adopting a higher quality factor Q, and the cavity 12 has the advantages of high power, high out-of-band rejection and small insertion loss and is convenient to install and debug.

Further, the resonant column 14 in the cavity 12 is cylindrical.

Furthermore, the filter 1 is also connected with a sealing cover plate 13 meeting low air pressure through laser seal welding, so that the assembly can meet the requirements of large power capacity and strong shock resistance under 15000 m low air pressure environment.

Further, the filter 1 is connected with a filter cover plate 19 through screws, so as to encapsulate each component inside.

Specifically, the power division coupler 2 further comprises a printed circuit board and a coupler cover plate 3, the main line and the auxiliary line are arranged on the upper surface of the printed circuit board, a lining plate 11 is further arranged above the main line and the auxiliary line, and the printed circuit board is fixedly connected with the lining plate 11 through the coupler cover plate 3 through screws.

Furthermore, the main line and the auxiliary line are designed by adopting a strip line structure, and the circuit substrate is high in dielectric constant, small in size, weak in coupling degree and high in bearing power due to the adoption of the strip line structure.

Furthermore, the filter 1 and the power division coupler 2 are made of aluminum alloy, and the heat dissipation effect of the whole device can be improved due to the aluminum alloy.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims (8)

1. An L-band integrated single-cavity structure filtering coupling assembly is characterized by comprising a filter (1) and a power division coupler (2) which are integrally formed, wherein a passband inside the filter (1) is combined with two ports, one port extends to the outside of the filter (1) to form a radio frequency input end (21), the other port is connected to the power division coupler (2),

the filter (1) comprises a cavity (12), a plurality of independent split type resonant columns (14) are arranged in the cavity (12), the resonant columns (14) are of hollow structures, the resonant columns (14) are connected in series through a tap line (15), the end of the tap line (15) is connected with a microstrip needle (16), one microstrip needle (16) is connected with a radio frequency input end (21), the other microstrip needle (16) is connected with a power division coupler (2) through a microstrip connecting plate (17), a resonant cavity (20) is formed between the two resonant columns (14), and tuning screws (18) are arranged on the resonant columns (14).

2. An L-band integrated single-cavity structure filtering coupling assembly according to claim 1, characterized in that the power division coupler (2) comprises a main line and a secondary line, the main line comprises a first end (5) and a second end (6), the microstrip pin (16) of the filter (1) is connected to the first end (5) through a microstrip connection board (17), the second end (6) is connected with the signal output end (22), the secondary line comprises a third end (7), a fourth end (8) and a fifth end (9), the sum of the powers of the third end (7) and the fourth end (8) is equal to the power of the fifth end (9), and the third end (7), the fourth end (8) and the fifth end (9) are all coupling ports.

3. The filtering coupling assembly of the L-band integrated single-cavity structure according to claim 1, wherein a sealing cover plate (13) meeting low air pressure is further connected to the filter (1) through laser seal welding.

4. The filtering coupling assembly of the L-band integrated single-cavity structure according to claim 2, wherein the power division coupler (2) further comprises a printed circuit board and a coupler cover plate (3), the main line and the auxiliary line are arranged on the upper surface of the printed circuit board, a lining plate (11) is further arranged above the main line and the auxiliary line, and the printed circuit board is fixedly connected with the lining plate (11) through the coupler cover plate (3) through screws.

5. The L-band integrated single-cavity structure filter coupling assembly of claim 2, wherein the main line and the sub line are each designed with a stripline structure.

6. An L-band integrated single-cavity structure filter coupling assembly according to claim 1, wherein the filter (1) is connected with a filter cover plate (19) by screws.

7. The filtering coupling assembly of the L-band integrated single-cavity structure according to claim 1, wherein the filter (1) and the power division coupler (2) are made of aluminum alloy.

8. An L-band integrated single-cavity structure filter coupling assembly according to claim 1, wherein the resonant column (14) in the cavity (12) is cylindrical.

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