CN211295375U

CN211295375U - Simple GNSS measuring antenna and navigation positioning system

Info

Publication number: CN211295375U
Application number: CN202020288818.9U
Authority: CN
Inventors: 卢林生; 刘小燕
Original assignee: Shenzhen Xinwei Communication Technology Co ltd
Current assignee: Shenzhen Xinwei Communication Technology Co ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-08-18
Anticipated expiration: 2030-03-10

Abstract

The utility model belongs to the field of antennas and discloses a simple GNSS measuring antenna and a navigation positioning system, which comprises a shielding cover and a PCB board which are arranged in a stacking way and a dielectric layer with a hollow structure on the PCB board; the first metal layer and the second metal layer are respectively arranged on the lower surface and the upper surface of the dielectric layer; the third metal layer is arranged on the upper surface of the dielectric layer; the frequency synthesis point penetrates through the whole dielectric layer through the through hole to connect the first metal layer and the second metal layer; and the feed probe penetrates through the dielectric layer and the air layer and is connected with the third metal layer and the network on the PCB. The periphery of the dielectric layer is provided with a metalized toothed ring, the metalized toothed ring is connected with the PCB, and the metalized toothed ring is concentric and conformal with the first metal layer and the second metal layer. The utility model discloses a under the condition that does not reduce the antenna performance, realized the performance requirement of dual-frenquency with hollow individual layer medium, reduced the section of antenna by a wide margin, alleviateed antenna weight, practiced thrift the cost.

Description

Simple GNSS measuring antenna and navigation positioning system

Technical Field

The utility model belongs to the antenna field especially relates to a simple and convenient GNSS measures antenna, navigation positioning system.

Background

Currently, GNSS systems include Global Positioning System (GPS) in the united states, Global Navigation Satellite System (Glonass) in russia, Galileo Satellite Navigation System (Galileo) in europe, and beidou Satellite Navigation System in china, and are widely applied to various Navigation terminals, and with the feasibility of high-precision Positioning, GNSS systems play more and more important roles in military and special civil fields.

Gnss positioning is an observation that uses pseudoranges, ephemeris, satellite transmit times, etc. from a set of satellites, while the user clock error must also be known. The global navigation satellite system is a space-based radio navigation positioning system that can provide users with all-weather 3-dimensional coordinates and velocity and time information at any location on the earth's surface or in near-earth space. Therefore, it is popular to say that if you want to know the altitude in addition to the longitude and latitude, you must receive 4 satellites to locate accurately.

As GNSS systems and receiver terminals are constantly seeking higher accuracy of measurement, the antennas are required to be able to receive satellites of the whole galaxy to improve the measurement accuracy of the measurement antennas. GNSS navigation and high accuracy positioning device are more and more light, increasingly littleer, and relatively common GNSS antenna on the market includes the Printed Circuit Board (PCB) of range upon range of setting, the two dielectric structure of first dielectric plate and second dielectric plate, and the section of GNSS antenna is higher so, and it is big to amass weight, and is with higher costs.

Through the above analysis, the problems and defects of the prior art are as follows:

(1) the prior GNSS antenna has higher profile, large volume, heavy weight and higher cost

(2) The existing GNSS antenna has a single signal feed mode and cannot realize effective transmission of signals.

The significance of solving the problems and the defects is as follows: the problem is solved, the transmission and the transmission of the same-frequency forwarding system signals are facilitated, the method is used for receiving and transmitting the signals of the GPS navigation system and the positioning system, the low-frequency feed point is realized, the performance of the GNSS is guaranteed, the complexity of GNSS antenna processing is reduced, and the method has important significance in realizing the miniaturized measurement type GNSS antenna on the whole.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model provides a simple and convenient GNSS measuring antenna.

The utility model is realized in such a way that the simple GNSS measuring antenna comprises a shielding cover and a PCB which are arranged in a stacking way, and a dielectric layer with a hollow structure is arranged on the PCB;

the first metal layer and the second metal layer are respectively arranged on the lower surface and the upper surface of the dielectric layer;

the third metal layer is arranged on the upper surface of the dielectric layer;

a frequency synthesis point which penetrates through the whole dielectric layer through a through hole to connect the first metal layer and the second metal layer;

and the feed probe penetrates through the dielectric layer and the air layer and is connected with the third metal layer and the network on the PCB.

Further, a metalized toothed ring is arranged on the periphery of the dielectric layer and connected with the PCB, and the metalized toothed ring is concentric and conformal with the first metal layer and the second metal layer.

Further, the first metal layer is of a circular and regular polygonal structure, and the second metal layer is of a circular and regular polygonal ring structure.

Further, the first metal layer and the second metal layer are concentrically arranged, and the outer diameter of the first metal layer is between the inner diameter and the outer diameter of the second metal layer.

Further, the first metal layer is located on the upper side or the lower side of the second metal layer.

Further, the first metal layer and the second metal layer are connected directly or in a coupling mode through frequency synthesis points, and the number of the synthesis points is 4 or integral multiple of 4.

Further, the frequency synthesis points are distributed in a central symmetry mode.

Further, the antenna performs coupled feeding or directly feeding excitation on the first metal layer.

Further, when the antenna is coupled to the first metal layer, the feeding form may be "T" type coupling or "L" type coupling, and the positions of the "T" type and the "L" type are located above or below the first metal layer.

Another object of the present invention is to provide a navigation positioning system with the simple GNSS measurement antenna.

Combine foretell all technical scheme, the utility model discloses the advantage that possesses and positive effect are: the utility model discloses a under the condition that does not reduce the antenna performance, realized the performance requirement of dual-frenquency with hollow individual layer medium, reduced the section of antenna by a wide margin, alleviateed antenna weight, practiced thrift the cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is a top view of a GNSS antenna structure provided by an embodiment of the present invention.

Fig. 2 is a bottom view of a GNSS antenna structure according to an embodiment of the present invention.

Fig. 3 is a side view of a GNSS antenna structure provided by the embodiment of the present invention

Wherein: a. a top view; b. a part feeding detail structure diagram.

Fig. 4 is a schematic view illustrating simulation of a low-frequency direction of a GNSS antenna according to an embodiment of the present invention;

wherein:

fig. 5 is a schematic view illustrating simulation of the high-frequency direction of a GNSS antenna according to an embodiment of the present invention;

wherein:

in the figure: 100. a dielectric layer; 101. a first metal layer; 102. a second metal layer; 103. a third metal layer; 200. a PCB board; 300. a shield cover; 110. a feed probe; 111. a frequency synthesis point; 112. and (5) metalizing the toothed circular ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

To the problem that prior art exists, the utility model provides a simple and convenient GNSS measures antenna, it is right to combine below the attached drawing 1 to attached drawing 5 the utility model discloses do detailed description.

As shown in fig. 1 and 2, the first metal layer 101 and the second metal layer 102 are concentrically arranged, the first metal layer 101 is attached to the lower surface of the dielectric layer 100, the second metal layer 102 is attached to the upper surface of the dielectric layer 100, and the outer diameter of the first metal layer 101 is between the inner diameter and the outer diameter of the second metal layer 102. The four frequency combining points 111 connected to the first metal layer 101 and the second metal layer 102 are distributed centrosymmetrically regardless of the position of the feeding probe. As shown in fig. 3, the simple GNSS measurement antenna includes a shielding cover 300, a PCB, and a dielectric layer 100 with a hollow structure disposed on the PCB 200; a circular first metal layer 101 is arranged on the lower surface of the dielectric layer 100, a circular second metal layer 102 is arranged on the upper surface of the dielectric layer, and four frequency synthesis points 111 penetrate through the whole dielectric layer through holes to connect the first metal layer 101 and the second metal layer 102; four independent small metal circles are also arranged on the upper surface of the dielectric layer and are used as a third metal layer 103, and the four feed probes 110 penetrate through the dielectric layer and an air layer (to avoid the first metal layer) to enable the third metal layer 103 to be connected with a network on the PCB 200; in addition, a plurality of metalized toothed rings 112 are disposed around the dielectric layer, and the metalized toothed rings 112 are connected to the PCB 200. The antenna excites the first metal layer 101 in a feed mode, which may be a coupled feed mode, a direct feed mode, or preferably a coupled feed mode. When the antenna is coupled to the first metal layer 101, the feeding may be in the form of "T" coupling or "L" coupling, preferably "T" coupling, and the positions of "T" and "L" may be above the first metal layer 101 or below the first metal layer 101.

As shown in fig. 3, four frequency synthesizing points 111 connected to the first metal layer 101 and the second metal layer 102 are distributed centrosymmetrically, regardless of the position of the feeding probe; the four feed probes 110 are distributed in a central symmetry manner, from bottom to top, one end of each feed probe 110 is connected with the PCB200 network, penetrates through the air part of the dielectric layer 100 and avoids the first metal layer 101, penetrates through the dielectric part of the dielectric layer, and the upper end of each feed probe is connected with the third metal layer 103; the entire feed is a "T" type coupled feed in this example. The periphery of the dielectric layer 100 is a metalized toothed ring 112 formed by a plurality of metal holes, and the metal toothed ring 112 is concentric with the first metal layer and the second metal layer, is distributed on the periphery of the first metal layer and the second metal layer, and is connected with the PCB board 200.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be covered within the protection scope of the present invention by those skilled in the art within the technical scope of the present invention.

Claims

1. A simple GNSS measuring antenna comprises a shielding cover and a PCB which are arranged in a stacking mode, and is characterized in that a dielectric layer of a hollow structure is arranged on the PCB;

the third metal layer is arranged on the upper surface of the dielectric layer;

2. The simplified GNSS surveying antenna of claim 1 wherein a metalized toothed ring is disposed around the dielectric layer, the metalized toothed ring being connected to the PCB board, the metalized toothed ring being concentric and conformal with the first metal layer and the second metal layer.

3. The simplified GNSS surveying antenna of claim 1 wherein the first metal layer is a circular, regular polygon structure and the second metal layer is a circular, regular polygon structure.

4. The GNSS measurement antenna of claim 1, wherein the first and second metal layers are concentrically arranged and the outer diameter of the first metal layer is between the inner and outer diameters of the second metal layer.

5. The compact GNSS surveying antenna of claim 1 wherein the first metal layer is located on an upper side or a lower side of the second metal layer.

6. The compact GNSS surveying antenna of claim 1 wherein the first metal layer and the second metal layer are connected directly or coupled by frequency combining points, the number of combining points being 4 or an integer multiple of 4.

7. The GNSS surveying antenna of claim 1, wherein the frequency combining points are arranged centrosymmetrically.

8. The simplified GNSS surveying antenna of claim 1 wherein antenna feed excitation of coupled or direct feed to the first metal layer.

9. The compact GNSS surveying antenna of claim 8 wherein the antenna is coupled to the first metal layer, the feeding may be in the form of a "T" coupling or an "L" coupling, and the positions of the "T" and "L" are located above or below the first metal layer.

10. A navigation positioning system incorporating a compact GNSS surveying antenna according to any of claims 1 to 9.