Air dielectric satellite positioning antenna

Abstract

The utility model relates to the technical field of antennas, and discloses an air dielectric satellite positioning antenna, which comprises an antenna metal sheet and a metal reflecting plate, a metal branch foot part, a signal feed foot part and a metal supporting foot part are arranged on the antenna metal sheet, and the metal supporting foot part is fixedly connected with the metal reflecting plate in an insulating manner. According to the utility model, the distribution of electric field lines at the edge of the metal antenna in the cavity resonance structure is changed through a metal stamping process, the miniaturization of the cavity resonance structure is realized, and the weight problem of the ceramic antenna is solved.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to an air-medium satellite positioning antenna. Background Technology

[0002] Currently, most satellite positioning antennas on the mobile communication market use ceramic dielectric antennas and quad-helical antennas. The ceramic antenna approach involves filling a cavity resonant structure with ceramic polymer materials to alter the cavity's resonant properties, thus miniaturizing the antenna while maintaining high gain and circular polarization. However, this results in a heavier antenna and higher manufacturing and environmental costs. The quad-helical antenna approach utilizes four independent helical metal conductors to generate two orthogonal resonant modes, achieving high gain and circular polarization. However, the length of the helical metal conductors is close to a quarter wavelength, leading to a larger antenna size and higher manufacturing costs.

[0003] Therefore, how to provide a new type of satellite positioning antenna is an urgent problem to be solved. Utility Model Content

[0004] This invention provides an air-medium satellite positioning antenna to solve the aforementioned technical problems in the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] An air-medium satellite positioning antenna includes an antenna metal sheet and a metal reflector. The antenna metal sheet is provided with a metal branch foot, a signal feed foot, and a metal support foot. The metal support foot is insulated and fixedly connected to the metal reflector. The metal branch foot and the metal reflector are in an open-circuit state.

[0007] Optionally, the number of metal branch feet is at least eight.

[0008] Optionally, the metal branch feet are located on opposite sides and diagonally opposite corners of the antenna metal sheet.

[0009] Optionally, the metal branch foot and the antenna metal sheet are integrally formed.

[0010] Optionally, the metal branch feet located on opposite sides of the antenna metal sheet are T-shaped structures, and the metal branch feet located at opposite corners of the antenna metal sheet are L-shaped structures.

[0011] Optionally, the metal branch foot is vertically connected to the antenna metal piece.

[0012] Optionally, a slot is provided in the middle of the antenna metal sheet, and the edge of the slot is connected to the signal feed foot.

[0013] Optionally, a second slot is formed at the edge of the antenna metal sheet near the opposite side in the middle, and the edge of the second slot is connected to the metal support foot.

[0014] Optionally, the metal support foot is insulated and fixedly connected to the metal reflector by: the metal reflector having a through hole, the metal support foot passing through the through hole and being welded and fixed.

[0015] Optionally, the metal support foot is insulated and fixedly connected to the metal reflector, which includes: a solder pad is provided on the metal reflector, an insulating layer is provided between the solder pad and the metal reflector, and the metal support foot is soldered to the solder pad.

[0016] The technical solution provided by this utility model can include the following beneficial effects:

[0017] This invention reduces the resonant frequency of the cavity resonance by changing the shape of the antenna metal sheet in the cavity resonant structure and controlling the density ratio of the electric field lines generated between the antenna metal sheet and the metal reflector, thereby achieving antenna miniaturization. The shape of the antenna metal sheet is achieved through a mature metal stamping process, ensuring high dimensional precision and consistent antenna production while significantly reducing manufacturing costs. Furthermore, no dielectric substrate is required between the antenna metal sheet and the metal reflector, realizing a completely air-dielectric cavity resonant structure. This not only significantly reduces the antenna's weight but also eliminates dielectric losses caused by the antenna substrate, ensuring high radiation efficiency.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of an air-medium satellite positioning antenna according to an exemplary embodiment. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of an air-medium satellite positioning antenna according to an exemplary embodiment. Figure 2 .

[0022] Figure label:

[0023] 1. Antenna metal sheet; 101. Metal branch foot; 102. Slot 1; 103. Signal feed foot; 104. Slot 2; 105. Metal support foot; 2. Metal reflector. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] According to an embodiment of the present invention, an air-medium satellite positioning antenna is provided.

[0026] like Figure 1-2 As shown, the air-medium satellite positioning antenna according to an embodiment of the present invention includes an antenna metal sheet 1 and a metal reflector 2. The antenna metal sheet 1 has eight metal branch legs 101 along its edge, located on opposite sides and diagonally opposite to each other. The metal branch legs 101 on opposite sides of the antenna metal sheet 1 have a T-shaped structure, while the metal branch legs 101 on diagonally opposite to each other have an L-shaped structure. Furthermore, the metal branch legs 101 are bent towards the metal reflector 2, perpendicular to the antenna metal sheet 1. Additionally, a slot 102 is formed in the middle of the antenna metal sheet 1, with a signal feed leg 103 connected to its edge. A second slot 104 is formed near the opposite edge of the middle of the antenna metal sheet 1, with a metal support leg 105 connected to its edge. The metal support leg 105 is insulated and fixedly connected to the metal reflector 2.

[0027] In the above embodiments, for the insulated fixed connection, in practical applications, it can be implemented in the following ways: one is to provide a through hole on the metal reflector 2, and the metal support foot 105 passes through the through hole and is welded and fixed; the other is to provide a solder pad on the metal reflector 2, and an insulating layer is provided between the solder pad and the metal reflector 2, and the metal support foot 105 is welded to the solder pad.

[0028] In practical applications, the signal feed pin 103 excites two mutually orthogonal electric field resonant components on the antenna metal plate 1. Their resonant frequencies are controlled by T-shaped and L-shaped metal branches, creating a 90° phase difference between the two resonators. A cavity resonant structure is formed between the antenna metal plate 1 and the metal reflector 2. The T-shaped and L-shaped metal branch pins 101, extending from the edge of the antenna metal plate 1, bend towards the metal reflector 2, altering the electric field line distribution density of the cavity resonant structure. This electric field line distribution density depends on the size of the metal branch pins 101 and the distance between the metal reflectors 2, thus controlling the direction of electric field energy reflection. Since the metal branch pins 101 do not change the distribution pattern of the magnetic field line density and magnetic flux density of the cavity structure, the electric field energy is still reflected at twice the reflection coefficient in a direction perpendicular to the antenna metal plate 1, thereby achieving the antenna's high gain characteristics. The formula is as follows:

[0029] Ms = 2x Eant, where Ms represents the cavity resonant structure, that is, the magnetic flux density of the region between the four sides of the antenna metal sheet and the metal reflector, and Eant represents the energy reflected by the antenna.

[0030] The metal support foot 105 serves two purposes: First, it appropriately increases the parasitic capacitance between the antenna metal plate 1 and the metal reflector 2, thereby miniaturizing the antenna metal plate. Furthermore, because the metal support foot 105 is far from the edge of the antenna metal plate 1, the voltage at this location is relatively small, and the heat loss generated by the antenna can be ignored. Second, it ensures a tight fixation between the antenna metal plate 1 and the metal reflector 2, guaranteeing the stability and consistency of antenna production.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air medium satellite positioning antenna, characterized by, The application relates to an antenna metal sheet and a metal reflecting plate, wherein a metal branch foot, a signal feed foot and a metal support foot are arranged on the antenna metal sheet, the metal support foot is fixedly connected with the metal reflecting plate in an insulation mode, and the metal branch foot and the metal reflecting plate are in an open circuit state. The number of the metal branch feet is at least 8.

2. An air medium satellite positioning antenna according to claim 1, characterized in that The metal branch feet are arranged on opposite sides and opposite corners of the antenna metal sheet.

3. An air media satellite positioning antenna according to claim 2, characterized in that The metal branch feet and the antenna metal sheet are integrally formed.

4. An air media satellite positioning antenna according to claim 3, characterized in that The metal branch feet on the opposite sides of the antenna metal sheet are T-shaped structures, and the metal branch feet on the opposite corners of the antenna metal sheet are L-shaped structures.

5. The air media satellite positioning antenna according to claim 3, characterized in that, The metal branch feet are vertically connected with the antenna metal sheet.

6. The air media satellite positioning antenna according to claim 1, characterized in that A first slot is arranged in the middle of the antenna metal sheet, and the edge of the first slot is connected with the signal feed foot.

7. The air media satellite positioning antenna according to claim 1, characterized in that, Second slots are arranged in the middle of the antenna metal sheet and close to the edges of the opposite sides, and the edges of the second slots are connected with the metal support feet.

8. The air media satellite positioning antenna of claim 1, wherein, The metal support foot is fixedly connected with the metal reflecting plate in an insulation mode, which comprises the following steps:

9. The air media satellite positioning antenna of claim 1, wherein, A through hole is arranged on the metal reflecting plate, the metal support foot penetrates through the through hole, and the metal support foot is welded and fixed. The metal support foot is fixedly connected with the metal reflecting plate in an insulation mode, which comprises the following steps:

10. The air media satellite positioning antenna of claim 1, wherein, A solder pad is arranged on the metal reflecting plate, an insulation layer is arranged between the solder pad and the metal reflecting plate, and the metal support foot is welded on the solder pad. ​

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