Miniaturized antenna

Abstract

The utility model relates to a miniaturized antenna, comprising an assembly plate, the top surface of the assembly plate is provided with a laminated dielectric antenna and a feed probe, and the bottom surface of the assembly plate is provided with a power division circuit, a combiner, a radio frequency circuit and a coaxial cable feed pad; the laminated dielectric antenna is formed by sequentially laminating a transmitting antenna medium and a receiving antenna medium, each of the transmitting antenna medium and the receiving antenna medium is provided with two probe holes, and connecting lines from the circle centers of the two probe holes on the same antenna medium to the central point of the antenna medium are vertical. According to the miniaturized antenna disclosed by the utility model, the overall size and thickness of the antenna are effectively reduced by adopting the laminated dielectric antenna structure, and the miniaturized and low-profile design is realized; according to the dual-feed antenna, the dual-feed mode and the symmetrical silver-coated design are adopted, the communication quality of the system is improved, meanwhile, the Wilkinson power division circuit is adopted to replace a traditional phase shifter, and miniaturization, light weight and high performance of the antenna are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of communication antennas, in particular to a miniaturized skylight antenna. Background Art

[0002] In the existing technology, domestic Tiantong antennas all use the large S frequency band, that is, the transmission frequency is 1995MHz±15MHz, the receiving frequency is 2185MHz±15MHz, and the polarization mode is left-hand circular polarization. At present, most Tiantong antennas on the market are used in mobile scenarios such as handheld devices. The antenna adopts a four-arm spiral structure, and the overall structure can be rotated and retracted to the side or a non-rotatable structure, but this type of structure cannot meet the needs of low-profile miniaturization scenarios such as vehicle-mounted, and the installation method cannot meet the needs of vehicle-mounted scenarios. Summary of the invention

[0003] In order to solve the above problems, the utility model provides a miniaturized Tiantong antenna which realizes miniaturization, lightness and high performance of the antenna.

[0004] In order to achieve the above-mentioned purpose, the miniaturized Tiantong antenna designed by the utility model comprises an assembly plate, the top surface of which is provided with a laminated dielectric antenna and a feeding probe, and the bottom surface is provided with a power division circuit, a combiner, a radio frequency circuit and a coaxial cable feeding pad; the laminated dielectric antenna is composed of a transmitting antenna medium and a receiving antenna medium stacked in sequence, the surface of the transmitting antenna medium is provided with a transmitting radiation surface, and the surface of the receiving antenna medium is provided with a receiving radiation surface, and the transmitting radiation surface and the receiving radiation surface are both symmetrical structures; the transmitting antenna medium and the receiving antenna medium are each provided with two probe holes, and the connecting line from the center of the two probe holes on the same antenna medium to the center point of the antenna medium where they are located is vertical; the feeding probe is divided into two groups through the probe hole, the top ends of the two groups of feeding probes are respectively welded on the transmitting radiation surface and the receiving radiation surface, and the bottom ends of the two groups of feeding probes are respectively electrically connected to the feeding end of the power division circuit through the assembly plate, and are mixed and output to the coaxial cable feeding pad after being combined by the power division circuit, wherein the signal received by the receiving antenna medium is amplified and filtered by the radio frequency circuit and then input to the combiner.

[0005] In order to make the circuit compact and integrated, the power division circuit includes a transmitting Wilkinson power division circuit and a receiving Wilkinson power division circuit. The bottom surface of the assembly board is provided with a first transmitting probe feeding point, a second transmitting probe feeding point, a first receiving probe feeding point and a second receiving probe feeding point. The first receiving probe feeding point and the second receiving probe feeding point are connected to the feed end of the receiving Wilkinson power division circuit, and the tail end of the receiving Wilkinson power division circuit is connected to the right end feeding point of the combiner through the radio frequency circuit; the first transmitting probe feeding point and the second transmitting probe feeding point are connected to the feed end of the transmitting Wilkinson power division circuit, and the tail end of the transmitting Wilkinson power division circuit is connected to the left end feeding point of the combiner; the combining feeding point of the combiner is connected to the coaxial cable feeding pad.

[0006] For electromagnetic shielding and interference suppression, a shielding cover is fixedly connected to the bottom of the assembly board. The shielding cover is made of pure metal material to wrap all circuit parts on the bottom of the assembly board, and a wire outlet hole opposite to the coaxial cable feeding pad is opened on the shielding cover.

[0007] A further solution is that a grounding pad is further provided on the bottom surface of the assembly board, and the grounding pad is located between the outlet hole and the coaxial cable feeding pad.

[0008] In order to reduce the overall weight of the antenna, the transmitting antenna medium and the receiving antenna medium are made of PPO high-frequency plastic.

[0009] In order to improve the performance of the antenna system, the transmitting radiation surface and the receiving radiation surface are silver-coated radiation surfaces arranged on the top surface and side surface of the transmitting antenna medium and the receiving antenna medium.

[0010] In order to reduce power consumption, the assembly board adopts a double-sided copper-clad FR-4 PCB board.

[0011] In order to simplify the circuit structure, the radio frequency circuit is a single-stage amplification and filtering circuit structure.

[0012] The miniaturized Tiantong antenna designed by the utility model adopts a laminated dielectric antenna structure, which effectively reduces the overall size and thickness of the antenna, realizing a miniaturized and low-profile design; and improves the communication quality of the system through a dual feeding method and a symmetrical silver-coated design. At the same time, the Wilkinson power division circuit is used to replace the traditional phase shifter, which effectively reduces the complexity and production cost of the system, and realizes the miniaturization, lightweight and high performance of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the three-dimensional structure of Example 1;

[0014] Figure 2 yes Figure 1 Right view of;

[0015] Figure 3Schematic diagram of the circuit planar structure of the bottom surface of the assembly board in Example 1.

[0016] Wherein: assembly board 1, first transmitting probe feed point 11, second transmitting probe feed point 12, first receiving probe feed point 13, second receiving probe feed point 14, ground pad 15, laminated dielectric antenna 2, transmitting antenna medium 21, receiving antenna medium 22, transmitting radiation surface 211, receiving radiation surface 221, power division circuit 3, transmitting Wilkinson power division circuit 31, receiving Wilkinson power division circuit 32, combiner 4, right end feed point 41, left end feed point 42, combiner feed point 43, radio frequency circuit 5, coaxial cable feeding pad 8, shielding cover 7, wire outlet hole 71, setting edge 72, solder joint 73. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0018] Example 1.

[0019] like Figure 1 As shown, the miniaturized Tiantong antenna described in this embodiment includes an assembly board 1, the top surface of the assembly board 1 is provided with a laminated dielectric antenna 2 and a feeding probe, and the bottom surface is provided with a power division circuit 3, a combiner 4, a radio frequency circuit 5 and a coaxial cable feeding pad 8; the laminated dielectric antenna 2 is composed of a transmitting antenna medium 21 and a receiving antenna medium 22 stacked in sequence, the surface of the transmitting antenna medium 21 is provided with a transmitting radiation surface 211, and the surface of the receiving antenna medium 22 is provided with a receiving radiation surface 221, and the transmitting radiation surface 211 and the receiving radiation surface 221 are both symmetrical structures; the transmitting antenna medium 21 and the receiving antenna medium 22 are provided with a receiving radiation surface 221. The receiving antenna medium 22 is provided with two probe holes 6, and the line connecting the centers of the two probe holes 6 on the same antenna medium to the center point of the antenna medium where they are located is vertical; the feeding probe is divided into two groups through the probe hole 6, and the top ends of the two groups of feeding probes are respectively welded on the transmitting radiation surface 211 and the receiving radiation surface 221, and the bottom ends of the two groups of feeding probes pass through the assembly board 1 and are respectively electrically connected to the feeding end of the power division circuit 3, and after the power division circuit 3 is combined and processed, they are mixed and output to the coaxial cable feeding pad 8 through the combiner 4, wherein the signal received by the receiving antenna medium 22 is amplified and filtered by the radio frequency circuit 5 and then input to the combiner 4. It should be noted that the line connecting the centers of the two probe holes 6 on the same antenna medium to the center point of the antenna medium where they are located is vertical, that is, if you look at the position of one probe hole 6 from the center point of the antenna (21, 22), and then rotate 90 degrees about its center point, you can see the position of the other probe hole 6, that is, the two probe holes 6 are set 90 degrees apart in space.

[0020] Specifically, the power division circuit 3 includes a transmitting Wilkinson power division circuit 31 and a receiving Wilkinson power division circuit 32. The bottom surface of the assembly board 1 is provided with a first transmitting probe feeding point 11, a second transmitting probe feeding point 12, a first receiving probe feeding point 13 and a second receiving probe feeding point 14. The first receiving probe feeding point 13 and the second receiving probe feeding point 14 are connected to the feed end of the receiving Wilkinson power division circuit 32, and the tail end of the receiving Wilkinson power division circuit 32 is connected to the right end feeding point 41 of the combiner 4 through the radio frequency circuit 5; the first transmitting probe feeding point 11 and the second transmitting probe feeding point 12 are connected to the feed end of the transmitting Wilkinson power division circuit 31, and the tail end of the transmitting Wilkinson power division circuit 31 is connected to the left end feeding point 42 of the combiner 4; the combiner feed point 43 of the combiner 4 is connected to the coaxial cable feeding pad 8.

[0021] When working, Figure 3 As shown, the signal received by the antenna is collected by the receiving antenna medium 22 and the feeding probe in the laminated dielectric antenna 2, and is input into the receiving Wilkinson power division circuit 32 in the power division circuit 3 through the first receiving probe feeding point 13 and the second receiving probe feeding point 14. The two signals are combined by the receiving Wilkinson power division circuit 32, and then filtered and amplified by the radio frequency circuit 5, and output to the combiner 4; in the transmission mode, the signal output by the transmitter is distributed to two groups of transmitting feeding probes through the transmitting Wilkinson power division circuit 31 in the power division circuit 3, and is sent by the transmitting antenna medium 21. Finally, the combiner 4 mixes the transmitting and receiving signals and outputs them to the coaxial cable feeding pad 8. The coaxial cable feeding pad 8 is used to connect the coaxial cable to transmit the signal received or sent by the antenna to other devices or systems. In summary, the miniaturized Tiantong antenna adopts a laminated antenna structure, a dual-fed 90° feeding structure and a symmetrical silver-coated radiating surface (211, 221), which ensures the stability of left-handed circular polarization while miniaturizing the overall structure of the antenna. The Wilkinson power divider circuit is used to replace the traditional phase shifter to reduce costs. The RF circuit improves the receiving sensitivity, making the antenna widely used in rapid deployment of vehicle-mounted antennas with high requirements on size and weight.

[0022] Example 2.

[0023] The miniaturized Tiantong antenna provided in this embodiment is based on the embodiment 1. Figure 2 As shown, the bottom surface of the assembly board 1 is fixedly connected with a shielding cover 7, and the shielding cover 7 is made of pure metal material to wrap all the circuit parts of the bottom surface of the assembly board 1, and the shielding cover 7 is provided with a wire outlet hole 71 opposite to the coaxial cable feeding pad 8. In this embodiment, the shielding cover 7 made of pure metal material helps to effectively prevent the influence of external electromagnetic interference on the internal circuit of the antenna. In specific implementation, Figure 3As shown, the bottom surface of the assembly board 1 can be provided with a setting edge 72 matching the contour of the shielding cover 7, and the shielding cover 7 is welded and fixed to the setting edge 72 through welding points 73; and the coaxial cable can pass through the outlet hole 71 and be welded to the coaxial cable feeding pad 8.

[0024] In this embodiment, if Figure 3 As shown, the bottom surface of the assembly board 1 is also provided with a ground pad 15, and the ground pad 15 is located between the outlet hole 71 and the coaxial cable feeding pad 8. The ground pad 15 provides a location for ground connection, and the antenna ground wire can be connected to the ground wire of the entire system. The ground pad 15 is located between the coaxial cable feeding pad 8 and the outlet hole 71, which can shorten the ground loop, reduce the ground impedance, and is beneficial to the grounding effect.

[0025] In this embodiment, in order to reduce the overall weight of the antenna, the transmitting antenna medium 21 and the receiving antenna medium 22 are made of PPO high-frequency plastic. PPO is a polymer engineering plastic with low density. The use of this material can greatly reduce the weight of the antenna, which is conducive to vehicle-mounted and portable.

[0026] In this embodiment, the transmitting radiation surface 211 and the receiving radiation surface 221 are silver-coated radiation surfaces arranged on the top and side surfaces of the transmitting antenna medium 21 and the receiving antenna medium 22. This structure improves the beam patterns in all directions, expands the coverage of the antenna, and can optimize the polarization characteristics of the antenna, improve the matching degree of the system, and the silver coating process is simple to implement, has good adhesion to the medium surface, and enhances the durability and reliability of the structure.

[0027] In this embodiment, the assembly board 1 is a PCB board made of double-sided copper-clad FR-4 material. FR-4 is a commonly used PCB board material with low cost, mature technology, and is conducive to mass production. At the same time, double-sided copper cladding can achieve high-density assembly of components and facilitate circuit design integration.

[0028] In this embodiment, the RF circuit 5 is a single-stage amplification and filtering circuit structure. This circuit structure is simple, requires only a small number of electronic components, is easy to manufacture and debug, and while obtaining sufficient gain in the single-stage amplification, avoids the stability problem of the multi-stage amplification of the RF circuit 5, and is suitable for occasions such as vehicles that have high requirements for volume and power consumption.

[0029] The miniaturized Tiantong antenna provided in this embodiment adopts a laminated dielectric antenna structure, which effectively reduces the overall size and thickness of the antenna, and realizes a miniaturized and low-profile design; and improves the communication quality of the system through a dual feeding method and a symmetrical silver-clad design. At the same time, the Wilkinson power division circuit is used to replace the traditional phase shifter, which effectively reduces the complexity and production cost of the system, and realizes the miniaturization, lightweight and high performance of the antenna.

[0030] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A miniaturized sky antenna, comprising a mounting plate (1), characterized in that: The top surface of the assembly board (1) is provided with a laminated dielectric antenna (2) and a feeding probe, and the bottom surface is provided with a power splitter circuit (3), a combiner (4), a radio frequency circuit (5) and a coaxial cable feeding pad (8); the laminated dielectric antenna (2) is composed of a transmitting antenna medium (21) and a receiving antenna medium (22) stacked in sequence, the surface of the transmitting antenna medium (21) is provided with a transmitting radiation surface (211), and the surface of the receiving antenna medium (22) is provided with a receiving radiation surface (221), and the transmitting radiation surface (211) and the receiving radiation surface (221) are both symmetrical structures; the transmitting antenna medium (21) and the receiving antenna medium (22) are each provided with a transmitting radiation surface (211) and a receiving radiation surface (221). Two probe holes (6) are arranged, and the lines connecting the centers of the two probe holes (6) on the same antenna medium to the center points of the antenna medium on which they are located are perpendicular; the feeding probes are divided into two groups through the probe holes (6), the top ends of the two groups of feeding probes are respectively welded on the transmitting radiation surface (211) and the receiving radiation surface (221), the bottom ends of the two groups of feeding probes pass through the assembly board (1) and are respectively electrically connected to the feeding ends of the power division circuit (3), and after being combined by the power division circuit (3), they are mixed and output to the coaxial cable feeding pad (8) through a combiner (4), wherein the signal received by the receiving antenna medium (22) is amplified and filtered by the radio frequency circuit (5) and then input to the combiner (4).

2. The miniaturized Skycom antenna according to claim 1 is characterized in that: The power division circuit (3) comprises a transmitting Wilkinson power division circuit (31) and a receiving Wilkinson power division circuit (32); a first transmitting probe feeding point (11), a second transmitting probe feeding point (12), a first receiving probe feeding point (13) and a second receiving probe feeding point (14) are arranged on the bottom surface of the assembly board (1); the first receiving probe feeding point (13) and the second receiving probe feeding point (14) are connected to the feeding end of the receiving Wilkinson power division circuit (32); The tail end of the Wilkinson power splitter circuit (32) is connected to the right end feed point (41) of the combiner (4) through the radio frequency circuit (5); the first transmitting probe feed point (11) and the second transmitting probe feed point (12) are connected to the feed end of the transmitting Wilkinson power splitter circuit (31), and the tail end of the transmitting Wilkinson power splitter circuit (31) is connected to the left end feed point (42) of the combiner (4); and the combining feed point (43) of the combiner (4) is connected to the coaxial cable feeding pad (8).

3. The miniaturized sky antenna according to claim 1 or 2, characterized in that: The bottom surface of the assembly board (1) is fixedly connected to a shielding cover (7), the shielding cover (7) is made of pure metal material to wrap all circuit parts of the bottom surface of the assembly board (1), and a wire outlet hole (71) opposite to the coaxial cable feeding pad (8) is provided on the shielding cover (7).

4. The miniaturized sky antenna according to claim 3 is characterized in that: The bottom surface of the assembly plate (1) is also provided with a grounding pad (15), and the grounding pad (15) is located between the outlet hole (71) and the coaxial cable feeding pad (8).

5. The miniaturized sky antenna according to claim 1 is characterized in that: The transmitting antenna medium (21) and the receiving antenna medium (22) are made of PPO high-frequency plastic.

6. The miniaturized sky antenna according to claim 1 or 5, characterized in that: The transmitting radiation surface (211) and the receiving radiation surface (221) are silver-coated radiation surfaces arranged on the top surface and side surface of the transmitting antenna medium (21) and the receiving antenna medium (22).

7. The miniaturized sky antenna according to claim 1 is characterized in that: The assembly board (1) is a PCB board made of double-sided copper-clad FR-4 material.

8. The miniaturized sky antenna according to claim 1 or 2, characterized in that: The radio frequency circuit (5) is a single-stage amplification and filtering circuit structure.

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