A variable pointing dual-frequency composite antenna assembly

Abstract

This invention relates to a variable-direction dual-band composite antenna assembly, comprising a VHF / UHF band antenna, an S-band antenna, an RF duplexer, a radome, an SMA cable assembly, and a metal cavity. The RF duplexer is fitted and mounted within the metal cavity. One end of the VHF / UHF band antenna is connected to the VHF / UHF band port of the RF duplexer. The other end of the VHF / UHF band antenna is fixedly connected to the S-band antenna. The S-band antenna is connected to the S-band port of the RF duplexer via the SMA cable assembly. Both the VHF / UHF band antenna and the S-band antenna are covered by the radome. This invention features a simple and reasonable structural design, good performance, and achieves miniaturization, flexibility, ease of movement, high gain, and adjustable radiation direction.

Description

Technical Field

[0001] This invention relates to the field of wireless communication technology, and more specifically to a variable-direction dual-frequency composite antenna assembly. Background Technology

[0002] Miniaturized mobile communication systems often require both shortwave and satellite communication. Conventional shortwave antennas are large, usually fixed in designated system locations, making them inconvenient to hold or move, and difficult to use in conjunction with antennas of other frequency bands. Therefore, conventional shortwave antennas cannot meet the needs of miniaturized mobile communication systems. Summary of the Invention

[0003] To address the technical problems existing in the background art, the present invention provides a variable directional dual-frequency composite antenna assembly with a simple and reasonable structural design, good performance, and the ability to achieve miniaturization, bendability, easy mobility, high gain, and adjustable radiation direction.

[0004] The technical solution of the present invention is as follows:

[0005] The aforementioned variable-directional dual-band composite antenna assembly includes a VHF / UHF band antenna, an S-band antenna, an RF duplexer, a radome, an SMA cable assembly, and a metal cavity. The RF duplexer is fitted and mounted within the metal cavity. One end of the VHF / UHF band antenna is connected to the VHF / UHF band port of the RF duplexer. The other end of the VHF / UHF band antenna is fixedly connected to the S-band antenna. The S-band antenna is connected to the S-band port of the RF duplexer via the SMA cable assembly. Both the VHF / UHF band antenna and the S-band antenna are covered by the radome.

[0006] The variable pointing dual-frequency composite antenna assembly includes: the VHF / UHF band antenna, which consists of a metal gooseneck tube, an upper helix, and a lower helix; the upper and lower helices are both spiral structures wound by monopole antennas and are respectively welded and fixed at both ends of the metal gooseneck tube.

[0007] The variable-direction dual-band composite antenna assembly includes: a radio frequency duplexer composed of an S-band duplex printed circuit board and a VHF / UHF band duplex printed circuit board; the S-band duplex printed circuit board and the VHF / UHF band duplex printed circuit board are respectively fixed on the front and back sides of the metal cavity; the S-band duplex printed circuit board and the VHF / UHF band duplex printed circuit board are connected by probes; the pads of the VHF / UHF band duplex printed circuit board are soldered to the lower spiral line through core wires, and one end of the metal cavity covers the lower spiral line through an extended metal cantilever to achieve VHF / UHF band ultra-wideband standing wave matching.

[0008] The variable-directional dual-frequency composite antenna assembly includes: one end of the upper helix is ​​welded and fixed to one end connector of the metal gooseneck tube, and the other end is matched and welded with a copper ring; the cable of the SMA cable assembly passes sequentially through the copper ring, the upper helix, the metal gooseneck tube, and the lower helix; the SMA connector shell of the SMA cable assembly is welded to the inner wall of the copper ring; the cable end of the SMA cable assembly has its inner core and shielding layer pulled out and welded to the corresponding pad positions on the S-band duplex printed circuit board.

[0009] The variable-direction dual-band composite antenna assembly includes: an S-band antenna with a dual-band four-arm helical structure adapted to the overall shape of the antenna assembly, which achieves left-hand circular polarization through a 90° phase difference via power feeding; the S-band antenna consists of an S-band antenna base, an S-band antenna connector, an S-band antenna chip printed circuit board, and an S-band antenna radiator; the S-band antenna connector is screwed and matched with the connector of the SMA cable assembly; the S-band antenna chip printed circuit board is soldered and fixed to the center of the back of the S-band antenna connector; the four pins of the S-band antenna radiator are respectively soldered to the back of the S-band antenna chip printed circuit board to which the S-band antenna connector is soldered.

[0010] The variable pointing dual-frequency composite antenna assembly, wherein: the S antenna radiator is a polyimide flexible board structure, which is rolled into a cylindrical shape along the narrow side and the joint is fixed with tape.

[0011] The variable pointing dual-frequency composite antenna assembly includes a metal gooseneck tube made of stainless steel with a bendable structure and both ends of the connector are silver-plated.

[0012] The variable pointing dual-frequency composite antenna assembly includes: the radome is made of PC+ABS material, which is matched and fixed to one end of the metal gooseneck tube and connected to the metal gooseneck tube as a whole; the radome covers the S-band antenna and the upper spiral.

[0013] The variable pointing dual-frequency composite antenna assembly further includes a fiberglass support cylinder; the fiberglass support cylinder is fitted into the upper section of the metal cavity, and is glued to the other end of the metal gooseneck tube, and covers the lower spiral. Beneficial effects

[0014] The present invention provides a simple and reasonable design for a variable-direction dual-frequency composite antenna assembly, which has good performance. It realizes the composite integration of VHF / UHF band antennas and S-band antennas, and achieves the functions of miniaturization, bendability, convenient movement and storage, high gain, and adjustable radiation direction. It enables the VHF / UHF band antenna and S-band antenna to work together to complete real-time communication, and is suitable for promotion and application. Attached Figure Description

[0015] Figure 1 These are the front view and bottom view of the variable pointing dual-frequency composite antenna assembly of the present invention;

[0016] Figure 2 This is a cross-sectional view of the variable pointing dual-frequency composite antenna assembly of the present invention;

[0017] Figure 3 This is an exploded view of the variable pointing dual-frequency composite antenna assembly of the present invention;

[0018] Figure 4 This is a schematic diagram of the assembly of the S-band antenna of the variable pointing dual-frequency composite antenna assembly of the present invention;

[0019] Figure 5 This is a schematic diagram of the radiating leaf of the S-band antenna in the variable pointing dual-frequency composite antenna assembly of the present invention;

[0020] Figure 6 This is a schematic diagram of the assembly (removal of the radome and adhesive layer) of the VHF / UHF band antenna and S-band antenna of the variable pointing dual-frequency composite antenna assembly of the present invention.

[0021] Figure 7 The VSWR diagram of the VHF / UHF band antenna of the variable pointing dual-frequency composite antenna assembly of the present invention is shown below.

[0022] Figure 8 This is a gain diagram of the VHF / UHF band antenna of the variable pointing dual-frequency composite antenna assembly of the present invention;

[0023] Figure 9 The standing wave diagram of the S-band antenna of the variable pointing dual-frequency composite antenna assembly of the present invention is shown below.

[0024] Figure 10 This is a gain diagram of the S-band antenna of the variable pointing dual-frequency composite antenna assembly of the present invention.

[0025] Notes: 1-Metal gooseneck tube, 2-Radar radome, 3-Connector, 4-Injection molded coating layer, 5-SMA cable assembly, 6-Upper spiral wire, 7-Lower spiral wire, 8-Fiberglass support cylinder, 9-Metal cavity, 10-S-band duplex printed circuit board, 11-VHF / UHF band duplex printed circuit board, 12-Copper ring, 13-S-antenna base, 14-S-band antenna connector, 15-S-band antenna chip printed circuit board, 16-S-antenna radiator, 17-Metal cavity cover plate. Detailed Implementation

[0026] like Figures 1 to 6As shown, the variable pointing dual-band composite antenna assembly of the present invention includes a metal gooseneck tube 1, an antenna cover 2, a connector 3, an injection-molded rubber layer 4, an SMA cable assembly 5, an upper spiral wire 6, a lower spiral wire 7, a fiberglass support cylinder 8, a metal cavity 9, an S-band duplex printed circuit board 10, a VHF / UHF band duplex printed circuit board 11, a copper ring 12, an S-band antenna base 13, an S-band antenna connector 14, an S-band antenna chip printed circuit board 15, an S-band antenna radiator 16, and a metal cavity cover plate 17.

[0027] The metal gooseneck tube 1, upper helix 6, and lower helix 7 constitute a VHF / UHF band antenna. The upper connector of the metal gooseneck tube 1 has an antenna radome mounting slot and an upper helix welding hole, while the lower connector has a lower helix welding hole. The upper helix 6 and lower helix 7 are helical structures wound by monopole antennas and are respectively welded and fixed to the upper and lower helix welding holes of the metal gooseneck tube 1. The lower helix 7 connects to the VHF / UHF band duplex printed circuit board 11 of the RF duplexer to achieve VHF / UHF band ultra-wideband standing wave matching. One end of the upper helix 6 is welded and fixed to one end of the gooseneck connector of the metal gooseneck tube 1, and the other end is matched and welded with a copper ring 12, such as... Figure 2 and Figure 6 As shown, the metal gooseneck tube 1 is used to enable adjustable radiation direction for VHF / UHF band and S-band antennas. It is made of stainless steel, and both ends of the gooseneck are silver-plated. The metal gooseneck tube 1 is bendable, enabling miniaturization, and the bending of the gooseneck allows for variable radiation pattern functionality.

[0028] The radome 2 is fixed to the radome mounting slot at the upper end of the metal gooseneck tube 1 and is integrated with the metal gooseneck tube 1. The radome 2 covers the upper spiral 6 of the S-band antenna and the VHF / UHF band antenna, providing protection. The radome 2 is made of PC+ABS material, which has high strength and can effectively protect the S-band antenna. To form a complete variable pointing dual-band composite antenna assembly of the present invention, the radome 2 is glued to the upper part of the assembled variable pointing dual-band composite antenna assembly of the present invention.

[0029] The S-band antenna consists of an S-band antenna base 13, an S-band antenna connector 14, an S-band antenna chip printed circuit board 15, and an S-band antenna radiator 16. This S-band antenna is connected and fixed to the upper end of a VHF / UHF band antenna and connected to the S-band port of an RF duplexer via an SMA cable assembly. The S-band antenna employs a dual-frequency, four-arm helical structure, adapted to the overall shape of the antenna. It achieves left-hand circular polarization through a 90° phase difference via power feeding and is connected from the top of the antenna to the bottom of the RF duplexer via the SMA cable assembly 5. The S-band antenna connector 14 is soldered and fixed to the center of the back of the S-band antenna chip printed circuit board 15. Figure 4 and Figure 5 As shown. The S-band antenna radiator 16 is a polyimide flexible board structure, rolled into a cylindrical shape along the narrow side (copper layer facing inward) and fixed with tape at the joints; the four pins of the S-band antenna radiator 16 are respectively soldered to the back of the S-band antenna chip printed circuit board 15, on which the S-band antenna connector 14 is soldered. The assembly with the S-band antenna chip printed circuit board 15, S-band antenna radiator 16, and S-band antenna connector 14 soldered is installed into the S-band antenna base 13, ensuring that the end face of the base 13 is flush with the end face of the assembly, and epoxy resin adhesive is applied to the spiral connection for fixation.

[0030] The S-band duplex printed circuit board 10 and the VHF / UHF band duplex printed circuit board 11 constitute an RF duplexer. This RF duplexer is fitted within a metal cavity 9. To protect the S-band duplex printed circuit board 10 and the VHF / UHF band duplex printed circuit board 11, two metal cavity cover plates 17 are placed on both sides of the metal cavity 9. The S-band duplex printed circuit board 10 and the VHF / UHF band duplex printed circuit board 11 are fixed to the front and back of the metal cavity 9 respectively with four screws. The S-band duplex printed circuit board 10 and the VHF / UHF band duplex printed circuit board 11 are connected via probes. The S-band duplex printed circuit board 10 and the VHF / UHF band duplex printed circuit board 11 are fixed to the two sides of the metal rib in the middle of the metal cavity 9 by four M1.6 screws respectively; the pads of the VHF / UHF band duplex printed circuit board 11 of the radio frequency duplexer are soldered to the lower spiral wire 7 through the core wire.

[0031] The SMA cable assembly 5 passes through the bottom of the S-band antenna, through the VHF / UHF band antenna, and vertically connects to the S-band duplexer, forming a composite structure. To assemble the S-band and VHF / UHF band antennas onto the same antenna, the SMA connector housing of the SMA cable assembly 5 is soldered to the inner wall of the copper ring 12. The cable of the SMA cable assembly 5 passes sequentially through the copper ring 12, the upper spiral 6, the metal gooseneck tube 1, and the lower spiral 7, allowing the S-band and VHF / UHF band antennas to be assembled onto the same antenna. The connector of the SMA cable assembly 5 is screwed into the S-antenna connector 14 of the S-band antenna. The cable end of the SMA cable assembly 5, with its inner core and shielding layer exposed, is soldered to the corresponding pad positions on the S-band duplex printed circuit board 10 of the RF duplexer.

[0032] The fiberglass support cylinder 8 is fitted inside the upper section of the metal cavity 9 and glued to the lower end connector of the metal gooseneck tube 1 of the VHF / UHF band antenna, covering the lower spiral 7 of the VHF / UHF band antenna. The inner wall of the fiberglass support cylinder 8 is coated with epoxy adhesive and bonded to the outer wall of the lower end connector of the metal gooseneck tube 1. Excess epoxy adhesive is wiped clean, ensuring that the lower spiral 7 is centered within the fiberglass support cylinder 8.

[0033] Four metal cantilever arms extend from the upper end of the metal cavity 9, covering the lower spiral line 7 of the VHF / UHF band antenna, thereby achieving VHF / UHF band ultra-wideband standing wave matching. The front and back sides of the metal cavity 9 are respectively equipped with an S-band duplex printed circuit board 10 and a VHF / UHF band duplex printed circuit board 11, thereby realizing S-band and VHF / UHF band duplex functions and S-band and VHF / UHF band antenna standing wave matching functions.

[0034] The variable pointing dual-band composite antenna assembly of the present invention is placed in a mold for injection molding and coating to form an injection molding coating layer 4, which can effectively protect the antenna structure while improving its appearance.

[0035] The present invention provides a simple and reasonable design for a variable-direction dual-frequency composite antenna assembly, which has good performance. It realizes the composite integration of VHF / UHF band antennas and S-band antennas, and achieves the functions of miniaturization, bendability, convenient movement and storage, high gain, and adjustable radiation direction. It enables the VHF / UHF band antenna and S-band antenna to work together to complete real-time communication, and is suitable for promotion and application.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable-direction dual-frequency composite antenna assembly, characterized in that: The antenna assembly includes a VHF / UHF band antenna, an S-band antenna, an RF duplexer, an antenna radome (2), an SMA cable assembly (5), and a metal cavity (9). The radio frequency duplexer is fitted and installed inside the metal cavity (9); One end of the VHF / UHF band antenna is matched and connected to the VHF / UHF band port of the radio frequency duplexer; the other end of the VHF / UHF band antenna is matched and fixedly connected to the S-band antenna. The S-band antenna is matched and connected to the S-band port of the RF duplexer through the SMA cable assembly (5); One end of the VHF / UHF band antenna and the S-band antenna are both covered by the antenna cover (2); The VHF / UHF band antenna is composed of a metal gooseneck tube (1), an upper helix (6) and a lower helix (7); the upper helix (6) and the lower helix (7) are both helical structures wound by monopole antennas and are respectively welded and fixed at both ends of the metal gooseneck tube (1); The radio frequency duplexer consists of an S-band duplex printed circuit board (10) and a VHF / UHF band duplex printed circuit board (11); the S-band duplex printed circuit board (10) and the VHF / UHF band duplex printed circuit board (11) are respectively fixed on the front and back sides of the metal cavity (9); the S-band duplex printed circuit board (10) and the VHF / UHF band duplex printed circuit board (11) are connected by probes; the pads of the VHF / UHF band duplex printed circuit board (11) are soldered to the lower spiral line (7) through core wires, and one end of the metal cavity (9) covers the lower spiral line (7) through an extended metal cantilever to achieve VHF / UHF band ultra-wideband standing wave matching; One end of the upper spiral (6) is welded and fixed to one end connector of the metal gooseneck tube (1), and the other end is matched and welded with a copper ring (12); the cable of the SMA cable assembly (5) passes through the copper ring (12), the upper spiral (6), the metal gooseneck tube (1) and the lower spiral (7) in sequence; the SMA connector shell of the SMA cable assembly (5) is welded to the inner wall of the copper ring (12); the inner core and shielding layer of the cable end of the SMA cable assembly (5) are pulled out and welded to the corresponding pad positions of the S-band duplex printed circuit board (10); The S-band antenna adopts a dual-frequency four-arm spiral structure and is adapted to the overall shape of the antenna assembly. It achieves left-hand circular polarization by feeding to achieve a 90° phase difference. The S-band antenna consists of an S-band antenna base (13), an S-band antenna connector (14), an S-band antenna chip printed circuit board (15), and an S-band antenna radiator (16). The S-band antenna connector (14) is matched and screwed to the connector of the SMA cable assembly (5). The S-band antenna chip printed circuit board (15) is matched and soldered to the center of the back of the S-band antenna connector (14). The four pins of the S-band antenna radiator (16) are respectively soldered to the back of the S-band antenna chip printed circuit board (15) on which the S-band antenna connector (14) is soldered.

2. The variable pointing dual-frequency composite antenna assembly as described in claim 1, characterized in that: The S-antenna radiator (16) is a polyimide flexible board structure, which is rolled into a cylinder along the narrow side and the joint is fixed with tape.

3. The variable pointing dual-frequency composite antenna assembly as described in claim 1, characterized in that: The metal gooseneck tube (1) is a bendable structure made of stainless steel, and both ends of the joint are silver-plated.

4. The variable pointing dual-frequency composite antenna assembly as described in claim 1, characterized in that: The radome (2) is made of PC+ABS material and is fixed to one end of the metal gooseneck tube (1) and connected to the metal gooseneck tube (1) as a whole; the radome (2) covers the S-band antenna and the upper spiral (6).

5. The variable pointing dual-frequency composite antenna assembly as described in claim 1, characterized in that: The antenna assembly also includes a fiberglass support cylinder (8); the fiberglass support cylinder (8) is fitted into the upper section of the metal cavity (9), and is glued to the other end of the metal gooseneck tube (1), and covers the lower spiral (7).

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