Double-frequency single-layer positioning antenna

Abstract

The utility model relates to the technical field of shared bicycles, in particular to a double-frequency single-layer positioning antenna, which comprises a ceramic dielectric block, a first radiating surface is arranged at the center of the upper surface of the ceramic dielectric block, and second radiating surfaces are arranged on the surface of the ceramic dielectric block around the first radiating surface; the bottom end of the ceramic dielectric block is connected with a PCB, the bottom end of the PCB is provided with a shielding case, and one end of the shielding case is provided with a radio frequency line. According to the RTK positioning antenna, a plurality of side surface routing coupling frequency points are utilized, the antenna performance is optimized, and the RTK positioning antenna has the advantages of small use area, small space, convenience in assembly, reliable structure and better actual use effect, and can be widely applied to various Internet of Things equipment; according to the utility model, through a multi-surface wiring design, dual-frequency is realized through coupling, and through GND slotting, low-frequency performance is optimized and improved; the dual-pin design improves the axial ratio of the antenna.

Description

TECHNICAL FIELD

[0001] The utility model relates to shared bicycle technical field, concretely is a double -frequent single -layer's positioning antenna. BACKGROUND

[0002] Shared bicycle reduces the use amount of car to some extent, not only punches through the " last one kilometer " of travel, also lets our life become more green environmental protection, in satisfying people safe, fast, comfortable travel, shared bicycle also becomes the strong medicine of treating urban congestion " cancer ".

[0003] Shared bicycle is higher and higher in positioning demand when using, all require adopting GPS double -frequent L1+L5 frequency band, and the antenna design of the past all adopts the laminated scheme, and the space requirement is higher, and the antenna cost is high. UTILITY MODEL CONTENT

[0004] The utility model is provided with a double -frequent single -layer's positioning antenna to solve the problem of the antenna design of the prior art all adopting the laminated scheme, high space requirement and high antenna cost.

[0005] To achieve the above object, the utility model provides the following technical scheme: a double -frequent single -layer's positioning antenna, including ceramic dielectric block, the first radiating surface is arranged in the central part of the upper surface of ceramic dielectric block, and the four around of the surface of ceramic dielectric block is provided with the second radiating surface in the first radiating surface;The bottom of PCB is provided with the shield case, and the one end of shield case is provided with the radio frequency wire, and the radio frequency wire penetrates shield case and is connected with PCB.

[0006] Preferably, the first radiating surface is composed of a square radiation main body and a protruding branch, the square radiation main body is arranged on the surface of the ceramic dielectric block, and the square radiation main body and the second radiating surface are both silver layers.

[0007] Preferably, the square radiation main body is integrally formed with the protruding branch around, and the protruding branch is rectangular.

[0008] Preferably, the surface of the second radiating surface is provided with a binding wire, and the binding wire is connected to the side wall of the ceramic dielectric block.

[0009] Preferably, the surface of the first radiating surface is provided with two groups of coupling feed points, and the bottom of the coupling feed points is fixed with a pin needle penetrating the ceramic dielectric block.

[0010] Preferably, the surface of the shield case is provided with a wire slot on one side, and one end of the radio frequency wire penetrates the wire slot and is electrically connected with the PCB.

[0011] Compared with the prior art, the beneficial effects of the double-frequency single-layer positioning antenna are that: the double-frequency single-layer positioning antenna utilizes multiple side surface wiring coupling frequency points, the antenna performance is optimally designed, has the advantages of small use area, small space, convenient assembly, reliable structure and better actual use effect, and can be widely applied to RTK positioning antennas of various Internet of Things devices; the double-frequency coupling is realized through the multi-surface wiring design, the low-frequency performance is optimized and improved through the GND slotting, and the antenna axial ratio is improved through the double-pin design. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional appearance structure schematic diagram of the utility model;

[0013] Figure 2 It is a three-dimensional explosion structure schematic diagram of the utility model;

[0014] Figure 3 It is a top view enlarged structure schematic diagram of the utility model;

[0015] Figure 4 It is a front view structure schematic diagram of the utility model;

[0016] Figure 5 It is a side view enlarged structure schematic diagram of the utility model;

[0017] Figure 6 It is a bottom view enlarged structure schematic diagram of the utility model;

[0018] Figure 7 It is a corresponding return loss curve diagram;

[0019] Figure 8 It is an antenna directional diagram;

[0020] Figure 9 It is a curve diagram of antenna efficiency changing with frequency;

[0021] Figure 10 It is a curve diagram of antenna gain changing with frequency.

[0022] In the drawing: 1, ceramic dielectric block; 11, first radiation surface; 111, square radiation main body; 112, protruding branch; 12, second radiation surface; 121, edge connecting line; 13, coupling feeding point; 14, pin needle; 2, PCB; 3, radio frequency line; 4, shielding cover; 41, wire slot. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. In addition, the terms "first", "second", "third", "upper", "lower", "left", "right" and the like are only used for the purpose of description, rather than being understood as indicating or implying relative importance. Meanwhile, in the description of the utility model, unless explicitly specified and limited, the terms "connected", "linked" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] The structure of the dual-frequency single-layer positioning antenna provided by the utility model is shown as Figure 1 、 Figure 2 and Figure 3 , comprising a ceramic dielectric block 1, the central part of the upper surface of the ceramic dielectric block 1 is provided with a first radiation surface 11, and the surface of the ceramic dielectric block 1 around the first radiation surface 11 is provided with a second radiation surface 12; the first radiation surface 11 is composed of a square radiation main body 111 and a protruding branch 112, the square radiation main body 111 is arranged on the surface of the ceramic dielectric block 1, and the square radiation main body 111 and the second radiation surface 12 are both silver layers, the square radiation main body 111 is integrally formed with the protruding branch 112 around the square radiation main body 111, and the protruding branch 112 is rectangular, the surface of the second radiation surface 12 is provided with a border connecting line 121, and the border connecting line 121 is connected to the side wall of the ceramic dielectric block 1.

[0025] The utility model utilizes multiple side surface wiring coupling frequency points, and the antenna performance is optimally designed, has the advantages of small use area, small space, convenient assembly, reliable structure and better actual use effect, and can be widely applied to RTK positioning antennas of various Internet of Things devices.

[0026] Further, as shown in Figure 2 、 Figures 4 to 6 , the surface of the first radiation surface 11 is provided with two groups of coupling feed points 13, the bottom end of the coupling feed points 13 is fixed with a pin needle 14 penetrating through the ceramic dielectric block 1, the bottom end of the ceramic dielectric block 1 is connected with a PCB 2, the bottom end of the PCB 2 is provided with a shielding cover 4, one end of the shielding cover 4 is provided with a radio frequency wire 3, the radio frequency wire 3 penetrates through the shielding cover 4 and is connected with the PCB 2, one side of the surface of the shielding cover 4 is provided with a wire groove 41, and one end of the radio frequency wire 3 penetrates through the wire groove 41 and is electrically connected with the PCB 2.

[0027] The utility model realizes dual-frequency coupling through multi-surface routing design, optimizes and improves low-frequency performance through GND slotting, and improves the antenna axial ratio through dual-pin design.

[0028] Working principle: The utility model utilizes multiple side routing coupling frequency points, and the antenna performance is optimized. It has the advantages of small usage area, small space, easy assembly, reliable structure, and better actual use effect. The utility model can be widely used in RTK positioning antennas of various Internet of Things devices.

[0029] In order to better illustrate the effect of the dual-band coplanar antenna of this application, this application conducted a test on the antenna related performance. Figure 7 is the corresponding return loss curve, Figure 8 is the antenna pattern, Figure 9 is a graph showing how antenna efficiency changes with frequency, Figure 10 This is a graph showing how antenna gain changes with frequency. In general, the present invention achieves dual-frequency coupling through multi-surface routing design, optimizes and improves low-frequency performance through GND slots, and improves the antenna axial ratio through a dual-pin design.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A dual-frequency single-layer positioning antenna, comprising a ceramic dielectric block (1), characterized in that: A first radiation surface (11) is provided at the center of the upper surface of the ceramic dielectric block (1), and second radiation surfaces (12) are provided on the surface of the ceramic dielectric block (1) around the first radiation surface (11); the bottom end of the ceramic dielectric block (1) is connected to a PCB (2), a shielding cover (4) is provided at the bottom end of the PCB (2), and a radio frequency line (3) is provided at one end of the shielding cover (4), and the radio frequency line (3) passes through the shielding cover (4) and is interconnected with the PCB (2).

2. The dual-frequency single-layer positioning antenna according to claim 1, characterized in that: The first radiation surface (11) is composed of a square radiation body (111) and protruding branches (112); the square radiation body (111) is arranged on the surface of the ceramic dielectric block (1); and both the square radiation body (111) and the second radiation surface (12) are silver layers.

3. The dual-frequency single-layer positioning antenna according to claim 2, characterized in that: The square radiation body (111) is integrally formed with protruding branches (112) on all four sides, and the protruding branches (112) are rectangular.

4. The dual-frequency single-layer positioning antenna according to claim 1, characterized in that: The surface of the second radiation surface (12) is provided with an edge-wrapped connecting line (121), and the edge-wrapped connecting line (121) is connected to the side wall of the ceramic dielectric block (1).

5. The dual-frequency single-layer positioning antenna according to claim 1, characterized in that: Two groups of coupling feeding points (13) are provided on the surface of the first radiation surface (11), and the bottom ends of the coupling feeding points (13) are fixed with pin needles (14) that penetrate the ceramic dielectric block (1).

6. The dual-frequency single-layer positioning antenna according to claim 1, characterized in that: A wire groove (41) is provided on one side of the surface of the shielding cover (4), and one end of the radio frequency line (3) passes through the wire groove (41) and is electrically connected to the PCB (2).

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