Integrated filtering low noise amplifier assembly

Abstract

The utility model discloses an integrated filtering low noise amplifier assembly, which comprises a filter and a low noise amplifier which are integrally formed, the filter comprises a cavity, a first port and a second port are arranged in the cavity, the first port extends to the outside of the cavity to form a radio frequency input end, and the second port extends to the outside of the cavity to form a radio frequency output end. The second port is directly connected with the input end of the low-noise amplifier through an output connection glass bead, and the output end of the low-noise amplifier extends to the outside of the low-noise amplifier to form a radio frequency output end. The filter and the low-noise amplifier are in an integrated design structure, and the output port of the filter is directly connected with the printed board of the low-noise amplifier through the glass beads, so that the structure is reasonable, the power capacity and reliability of the cavity filter are greatly improved, and the defects that the conventional cavity filter is large in size, poor in grounding performance, difficult to link and large in signal leakage due to an integrated mode, and the like are overcome. The matching effect is not good, and the heat dissipation is not good.

Description

Technical Field

[0001] The utility model relates to the technical field of communication electronic equipment, and in particular to an integrated filtering and low-noise amplifier component. Background Art

[0002] In communication systems, the signal received from the antenna is amplified for processing by subsequent electronic equipment. Since the signal from the antenna is generally very weak, the low noise amplifier is generally located very close to the antenna to reduce the loss of the signal through the transmission line. This active antenna configuration is widely used in microwave systems such as the Global Positioning System (GPS).

[0003] Low noise amplifiers and filters play an important role in the system. Low noise amplifiers are used in microwave equipment and systems to reduce noise interference in circuits, while filters with good performance can make full use of frequency resources, expand system capacity, and suppress interference from out-of-band signals.

[0004] According to conventional technology, when using these two devices with different functions, users use separate types to connect them to the system circuit.

[0005] The disadvantages of this method are as follows:

[0006] 1) The two devices are connected by a connector, which is large in size, occupies a large space, and has a complex structure.

[0007] 2) Both devices use embedded connections in the circuit, resulting in signal leakage and poor electrical performance indicators.

[0008] 3) The embedded connection between the two devices results in poor matching in the circuit, which is difficult to compensate and reduces power capacity. Utility Model Content

[0009] The utility model aims to provide an integrated filtering low noise amplifier component, which is used to solve the problem of excessive volume when the low noise amplifier and the filter are combined in the prior art.

[0010] In order to solve the above technical problems, the utility model adopts the following solutions:

[0011] An integrated filter and low noise amplifier component includes a filter and a low noise amplifier formed in an integrated structure. The filter includes a cavity. A first port and a second port are provided inside the cavity. The first port extends to the outside of the cavity to form a radio frequency input end. The second port is directly connected to the input end of the low noise amplifier through an output connecting glass bead. The output end of the low noise amplifier extends to the outside of the low noise amplifier to form a radio frequency output end.

[0012] In some optional embodiments, a plurality of integrated resonant rods are provided in the cavity, and a coupling cavity is formed between two adjacent resonant rods. The resonant rod near the first end is connected to an input tap line, and the input tap line is connected to the RF input end through an input connector. The resonant rod near the second end is connected to an output tap line, and the output tap line is connected to the output connecting glass bead.

[0013] In some optional embodiments, the input connector includes an input glass bead and a first microstrip needle, one end of the first microstrip needle is connected to the input glass bead, and the other end passes through the RF input end, and the input connecting glass bead is connected to the input tap line.

[0014] In some optional embodiments, a tuning screw is provided on the resonant rod, and a plurality of resonant rods are arranged in an interdigital structure in the cavity. The cavity is designed with an interdigital structure with a high Q value, and has the advantages of high power, high out-of-band suppression and low insertion loss, and is easy to install and debug.

[0015] In some optional embodiments, the plurality of resonant rods include two first resonant rods respectively disposed near the first port and the second port, and a plurality of second resonant rods disposed between the first resonant rods, and the length of the first resonant rod is greater than that of the second resonant rod.

[0016] In some optional implementations, the resonant rod is in the shape of an integrated square column, and the resonant rods disposed at two ends inside the cavity have different size structures.

[0017] In some optional embodiments, the output connecting glass bead includes an output glass bead and a second microstrip needle. The output glass bead is connected to the output tap line. One end of the second microstrip needle is connected to the output glass bead, and the other end passes through the second port and is directly connected to the input end of the low noise amplifier.

[0018] In some optional embodiments, a filter cover is further included, and the filter cover is tightly covered on the filter by screws. The low noise amplifier includes a housing, a printed circuit board, a carrier board and a low noise amplifier cover, the printed circuit board is encapsulated in the housing, the carrier board is arranged between the printed circuit board and the low noise amplifier cover, the low noise amplifier cover is covered on the housing by screws, and the second port is directly connected to the input end of the printed circuit board through the output connecting glass bead.

[0019] In some optional implementations, in order to increase the heat dissipation effect, the filter, the housing, the filter cover, and the low noise amplifier cover are all made of aluminum alloy.

[0020] Beneficial effects of the utility model:

[0021] The utility model discloses an integrated filtering low-noise amplifier component. The utility model adopts an integrated design structure of the filter and the low-noise amplifier. The filter output port adopts glass beads to directly connect with the low-noise amplifier printed circuit board. The structure is reasonable, which greatly improves the power capacity and reliability of the cavity filter, and makes up for the previous large volume. The problem is solved by an integrated way, which makes up for the large volume, poor grounding performance, large signal leakage, poor matching effect, and poor heat dissipation caused by the split type and microstrip embedded connection method of the previous two devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic cross-sectional view of an integrated filter and low-noise amplifier provided in an embodiment of the utility model;

[0023] Figure 2 A schematic longitudinal cross-sectional view of an integrated filter and low noise amplifier provided by an embodiment of the utility model;

[0024] Figure 3 A front view of an integrated filter low-noise amplifier provided in an embodiment of the utility model;

[0025] Figure 4 A top view of the integrated filtering and low-noise amplifier provided in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1-filter, 2-low noise amplifier, 21-housing, 22-low noise amplifier cover, 23-low noise amplifier printed circuit board, 24-carrier, 3-RF input, 4-RF output, 5-grounding column, 6-tuning screw, 7-first resonant rod, 8-second resonant rod, 9-input glass bead, 10-first microstrip needle, 11-input tap line, 12-output glass bead, 13-second microstrip needle, 14-output tap line, 15-filter cover, 16-coupling cavity. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0029] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The present invention is described in detail below with reference to the accompanying drawings and in combination with embodiments:

[0032] Embodiment 1:

[0033] like Figures 1 to 4 As shown, this embodiment provides an integrated filter low noise amplifier 2 component, including a filter 1 and a low noise amplifier 2 formed in an integrated structure, the filter 1 includes a cavity, a first port and a second port are provided inside the cavity, the first port extends to the outside of the cavity to form a radio frequency input terminal 3, the second port is directly connected to the input terminal of the low noise amplifier 2 through an output connecting glass bead, and the output terminal of the low noise amplifier 2 extends to the outside of the low noise amplifier 2 to form a radio frequency output terminal 4. A grounding column 5 is provided on the side wall of the filter 1 near the radio frequency output terminal 4.

[0034] Specifically, a plurality of integrated resonant rods are provided in the cavity of the filter 1, and the plurality of resonant rods are connected at corresponding positions inside the cavity by mechanical processing, and a coupling cavity 16 is formed between two adjacent resonant rods. The resonant rod near the first end is connected with an input tap line 11, and the input tap line 11 is connected to the RF input terminal 3 through an input connector, and the resonant rod near the second end is connected with an output tap line 14, and the output tap line 14 is connected to the output connecting glass bead. The cavity structure with high Q value in the same extraction mode is adopted for design, and the advantages of the cavity are that it has the advantages of high power, high out-of-band suppression and small insertion loss, and is easy to install and debug.

[0035] Specifically, the input connector includes an input glass bead 9 and a first microstrip needle 10. The input glass bead 9 is welded at one end of the first microstrip needle 10, and the other end passes through the RF input terminal 3. The input connecting glass bead is connected to the input tap line 11. The output connecting glass bead includes an output glass bead 12 and a second microstrip needle 13. The output glass bead 12 is connected to the output tap line 14. One end of the second microstrip needle 13 is connected to the output glass bead 12, and the other end passes through the second port and is directly connected to the input end of the low noise amplifier 2. The output port of the filter 1 is directly connected to the low noise amplifier printed circuit board 23 using glass beads. The structure is reasonable, which greatly improves the power capacity and reliability of the cavity filter 1, and makes up for the previous large volume, which is solved by an integrated way, poor grounding performance, difficult connection method, large signal leakage, poor matching effect, and poor heat dissipation.

[0036] The resonant rod is provided with a tuning screw 6, and the resonant rod is an integrated square column, and a plurality of resonant rods are arranged in an interdigitated structure in the cavity. In the present application, the resonant rod adopts two resonant rods with different size structures, specifically, the resonant rods at both ends of the cavity have the same size structure, and the other resonant rods have the same size, and the resonant rods at both ends of the cavity are longer than other resonant rods. The plurality of resonant rods include two first resonant rods 7 respectively arranged near the first port and the second port, and a plurality of second resonant rods 8 arranged between the first resonant rods 7, and the length of the first resonant rod 7 is greater than the length of the second resonant rod 8. The use of two resonant rods with different size structures makes it easier to adjust to a suitable frequency for common output through the tuning screw 6 to improve the power capacity.

[0037] Specifically, it also includes a filter cover 15, which is tightly covered on the filter 1 by screws, and the cover is used to encapsulate various internal components. The low noise amplifier 2 includes a housing 21, a printed circuit board, a carrier 24 and a low noise amplifier cover 22. The printed circuit board is encapsulated in the housing 21, the carrier 24 is arranged between the printed circuit board and the low noise amplifier cover 22, and the low noise amplifier cover 22 is covered on the housing 21 by screws. The second port is directly connected to the input end of the printed circuit board through the output connecting glass bead.

[0038] In order to increase the heat dissipation effect of the entire device, the filter 1, the housing 21, the filter cover 15, and the low noise amplifier cover 22 are all made of aluminum alloy.

[0039] An integrated structure filter low noise amplifier 2 component, the filter low noise amplifier 2 component includes a filter 1 and a low noise amplifier 2 formed in an integrated structure, the filter 1 includes a cavity, a plurality of integrated resonant rods are arranged in the cavity, a coupling cavity 16 is formed between two adjacent resonant rods, the resonant rods are connected in series through a tap line, the two ends of the tap line are respectively connected to an input glass bead 9 and an output glass bead 12, there are two ports inside the cavity, one port extends to the outside of the cavity to form a radio frequency input terminal 3, the input glass bead 9 is arranged at the radio frequency input terminal 3, and the other port is directly connected to the printed circuit board signal input terminal in the low noise amplifier 2 through the output glass bead 12.

[0040] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An integrated filter low noise amplifier component, characterized in that: The invention comprises a filter (1) and a low noise amplifier (2) formed in an integral structure. The filter (1) comprises a cavity. A first port and a second port are arranged inside the cavity. The first port extends to the outside of the cavity to form a radio frequency input end (3). The second port is directly connected to the input end of the low noise amplifier (2) via an output connecting glass bead. The output end of the low noise amplifier (2) extends to the outside of the low noise amplifier (2) to form a radio frequency output end (4).

2. The integrated filter low noise amplifier component according to claim 1, characterized in that: A plurality of integrated resonant rods are arranged in the cavity, and a coupling cavity (16) is formed between two adjacent resonant rods. The resonant rod near the first end is connected to an input tap line (11), and the input tap line (11) is connected to a radio frequency input end (3) through an input connector. The resonant rod near the second end is connected to an output tap line (14), and the output tap line (14) is connected to an output connecting glass bead.

3. The integrated filter low noise amplifier component according to claim 2, characterized in that: The input connecting piece comprises an input glass bead (9) and a first microstrip needle (10). One end of the first microstrip needle (10) is connected to the input glass bead (9), and the other end thereof passes through the radio frequency input end (3). The input connecting glass bead is connected to the input tap line (11).

4. The integrated filter low noise amplifier component according to claim 2, characterized in that: A tuning screw (6) is provided on the resonance rod, and a plurality of resonance rods are arranged in the cavity in an interdigitated structure.

5. The integrated filter low noise amplifier component according to claim 2, characterized in that: The plurality of resonant rods include two first resonant rods (7) respectively arranged near the first port and the second port, and a plurality of second resonant rods (8) arranged between the first resonant rods (7). The length of the first resonant rod (7) is greater than the length of the second resonant rod (8).

6. The integrated filter low noise amplifier component according to claim 2, characterized in that: The resonant rod is an integrated square column.

7. The integrated filtering and low noise amplifier component according to claim 2, characterized in that: The output connecting glass bead comprises an output glass bead (12) and a second microstrip needle (13). The output glass bead (12) is connected to an output tap line (14). One end of the second microstrip needle (13) is connected to the output glass bead (12), and the other end passes through a second port and is directly connected to the input end of the low noise amplifier (2).

8. The integrated filter low noise amplifier component according to claim 1, characterized in that: It also comprises a filter cover plate (15), which is tightly covered on the filter (1) by screws.

9. The integrated filter low noise amplifier component according to claim 8, characterized in that: The low noise amplifier (2) comprises a housing (21), a printed circuit board, a carrier board (24) and a low noise amplifier cover board (22); the printed circuit board is encapsulated in the housing (21); the carrier board (24) is arranged between the printed circuit board and the low noise amplifier cover board (22); the low noise amplifier cover board (22) is arranged on the housing (21) by means of screws; and the second port is directly connected to the input end of the printed circuit board by means of an output connecting glass bead.

10. The integrated filter low noise amplifier component according to claim 9, characterized in that: The filter (1), the housing (21), the filter cover plate (15) and the low noise amplifier cover plate (22) are all made of aluminum alloy.

Images