CN220400893U

CN220400893U - Vehicle-mounted 4 and G, GPS two-in-one antenna

Info

Publication number: CN220400893U
Application number: CN202321943066.5U
Authority: CN
Inventors: 苟向荣; 章万莉; 马能萍
Original assignee: Shanghai Sifang Communication Engineering Co ltd
Current assignee: Shanghai Sifang Communication Engineering Co ltd
Priority date: 2023-07-24
Filing date: 2023-07-24
Publication date: 2024-01-26
Anticipated expiration: 2033-07-24

Abstract

The utility model relates to the technical field of antennas, and discloses a vehicle-mounted 4 and G, GPS two-in-one antenna, which comprises a plastic upper shell, a ceramic body and nickel-plated steel sheets, wherein the ceramic body and the nickel-plated steel sheets are welded on the front surface of a PCB (printed circuit board), a shielding cover and a radio frequency wire are welded on the back surface of the PCB, a first radio frequency connector and a second radio frequency connector are pressed and mounted on the radio frequency wire, a wire buckle for limiting the first radio frequency connector and the second radio frequency connector is mounted on the radio frequency wire in a buckling manner, and foam cotton for supporting the first radio frequency connector and the second radio frequency connector is stuck on the side wall of the shielding cover; according to the vehicle-mounted 4G & GPS two-in-one antenna, two single antennas are combined into one antenna, so that the product structure assembly precision is optimized, the product structure assembly precision is high, the product structure assembly precision can pass through a vibration durability test and an IPX7 waterproof test, the vehicle-mounted 4G & GPS two-in-one antenna is excellent in radio frequency performance, the average efficiency is greater than 50%, the average gain is greater than 3dBi, and the absolute value of the return loss Log of the LTE full-band is greater than 7dBi. The GPS can realize high-precision positioning and can realize positioning with maximum error of not more than 5 meters.

Description

Vehicle-mounted 4 and G, GPS two-in-one antenna

Technical Field

The utility model relates to the technical field of antennas, in particular to a vehicle-mounted 4 and G, GPS two-in-one antenna.

Background

An antenna is a transducer that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space) or vice versa. A component for transmitting or receiving electromagnetic waves in a radio device. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing, radio astronomy and the like all rely on antennas to work when information is transmitted by electromagnetic waves.

At present, the 4G antenna and the GPS antenna are divided into two bodies, and the shell is large in size and inconvenient to install. The GPS antenna ceramic body is fixed, so that design defects exist, the antenna is continuously vibrated in the running process of a vehicle after being mounted on a truck, the ceramic antenna body is vibrated and deformed in a shell to cause the breakage of a bonding pad, and antenna signals cannot be input and output and cannot be used; the 4G antenna has poor radio frequency performance, average efficiency of less than 30 percent and average gain of less than 2dBi. In addition, the base is not waterproof, and indoor damp or outdoor rain causes the base to corrode and cannot be electrified, so that the antenna function is invalid.

Disclosure of Invention

The utility model aims to provide a vehicle-mounted 4 and G, GPS two-in-one antenna so as to solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a on-vehicle 4G, GPS two unification antennas, includes plastics epitheca, ceramic body and nickel plating steel sheet welding are in the front of PCB circuit board, PCB circuit board's back welding has shield cover and radio frequency line, pressfitting installs radio frequency connector one and radio frequency connector two on the radio frequency line, the buckle is installed on the radio frequency line and is carried out spacing line knot to radio frequency connector one and radio frequency connector two.

Optionally, foam for supporting the first radio frequency connector and the second radio frequency connector is adhered to the side wall of the shielding case.

Optionally, a plastic lower shell is welded and installed on the plastic upper shell, and a magnet is buckled and installed on the side wall of one side of the plastic lower shell.

Optionally, a back glue layer is adhered to the side wall of the plastic lower shell far away from the plastic upper shell.

Optionally, the radio frequency wire is an LMR-100 wire, one end of the radio frequency wire is in telecommunication connection with the PCB, and the other end of the radio frequency wire is in telecommunication connection with the first radio frequency connector or the second radio frequency connector.

Optionally, an antenna circuit is disposed on the PCB, and the antenna circuit includes: an active antenna interface 1, an antenna state detection port 2 and a vehicle-mounted GPS interface 3.

Optionally, a capacitor C3 and a ferrite magnetic bead 1 are connected in series between the active antenna interface 1 and the vehicle-mounted GPS interface 3, the active antenna interface 1 is connected with one end of a transient diode, and the other end of the transient diode is grounded;

an inductor L2 and a resistor R2 are connected in series between the active antenna interface 1 and the vehicle-mounted GPS interface 3, the vehicle-mounted GPS interface 3 is connected with one end of a resistor R3, the other end of the resistor R3 is grounded and is connected with one end of a capacitor C5, and the resistor R3 and the capacitor C5 are connected in parallel with the resistor R2.

Optionally, the other end of the capacitor C5 is connected to the OUT end of the power management chip U1, a capacitor C4 is connected in series between the VIN end and the VSS end of the power management chip U1, the VIN end of the power management chip U1 is connected to one end of the ferrite bead 3, the other end of the ferrite bead 3 is connected to the vdd+5v end, and the VSS end of the power management chip U1 is grounded.

Optionally, the active antenna interface 1 is connected with a capacitor C1 and a capacitor C2, and both the capacitor C1 and the capacitor C2 are grounded.

Compared with the prior art, the utility model provides the vehicle-mounted 4 and G, GPS two-in-one antenna, which has the following beneficial effects:

according to the vehicle-mounted 4G & GPS two-in-one antenna, two single antennas are combined into one antenna, so that the product structure assembly precision is optimized, the product structure assembly precision is high, the product structure assembly precision can pass through a vibration durability test and an IPX7 waterproof test, the vehicle-mounted 4G & GPS two-in-one antenna is excellent in radio frequency performance, the average efficiency is greater than 50%, the average gain is greater than 3dBi, and the absolute value of the return loss Log of the LTE full-band is greater than 7dBi. The GPS can realize high-precision positioning and can realize positioning with maximum error of not more than 5 meters.

Drawings

FIG. 1 is a schematic view of the overall apparatus of the present utility model;

fig. 2 is a schematic diagram of an antenna circuit according to the present utility model;

FIG. 3 is a schematic diagram of signal detection according to the present utility model;

FIG. 4 is a schematic diagram of signal detection according to the present utility model.

In the figure: 1. a plastic upper shell; 2. a ceramic body; 3. nickel plated steel sheet; 4. a radio frequency line; 5. a wire buckle; 6. a first radio frequency connector; 7. a second radio frequency connector; 8. a PCB circuit board; 9. a shield; 10. soaking cotton; 11. a magnet; 12. a plastic lower shell; 13. and (5) a back adhesive layer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 4, the present utility model provides a technical solution: a vehicle-mounted 4 and G, GPS two-in-one antenna comprises a plastic upper shell 1, a ceramic body 2 and a nickel plated steel sheet 3, wherein the ceramic body 2 is used as a GPS antenna receiving component, and an electric signal is fed into a conductor from the center of the antenna; the nickel-plated steel sheet 3 is used as a common component for transmitting and receiving a 4G antenna: generating an electromagnetic wave radiation field, feeding an electric signal into a conductor from the center of an antenna, welding a ceramic body 2 and a nickel-plated steel sheet 3 on the front surface of a PCB (printed circuit board) 8, adjusting a receiving frequency range by the PCB 8, and optimizing the axial ratio, elevation angle, output standing wave ratio and the like of the antenna; amplifying the GPS receiving antenna signal, wherein the gain of the GPS L1 antenna is about 10 times; the back of the PCB 8 is welded with a shielding cover 9 and a radio frequency wire 4, the radio frequency wire 4 is provided with a first radio frequency connector 6 and a second radio frequency connector 7 in a pressing mode, and the radio frequency wire 4 is provided with a wire buckle 5 for limiting the first radio frequency connector 6 and the second radio frequency connector 7 in a buckling mode; the first radio frequency connector 6 and the second radio frequency connector 7 are Fakra C and D radio frequency connectors and are used for connecting an antenna with terminal automobile T-BOX equipment and transmitting antenna radio frequency signals to the terminal equipment; the shielding cover 9 is used for shielding electronic signals, can shield the influence of external electromagnetic waves on an internal circuit and the electromagnetic waves generated in the shielding cover 9 from radiating outwards, and consists of supporting legs and a cover body, wherein the supporting legs are detachably buckled with the cover body, and the whole shielding cover 9 is made of stainless steel with the thickness of 0.2 mm.

It should be noted that foam 10 for supporting the first rf connector 6 and the second rf connector 7 is adhered to the side wall of the shielding case 9. The plastic upper shell 1 is welded with the plastic lower shell 12, the side wall of one side of the plastic lower shell 12 is buckled with the magnet 11, and the magnet 11 is used for adsorbing the antenna on the automobile structural member. The plastic lower shell 12 is far away from the side wall of one side of the plastic upper shell 1 and is stuck with a back adhesive layer 13, the back adhesive layer 13 is used for sticking and fixing the whole antenna on a structural member of an automobile, and the plastic lower shell 12 and the plastic upper shell 1 are used for protecting internal elements and playing a role in preventing water and collision.

It should be noted that the rf line 4 is an LMR-100 wire, one end of the rf line 4 is in telecommunication connection with the PCB circuit board 8, and the other end is in telecommunication connection with the rf connector one 6 or the rf connector two 7, and the rf line 4 is used for connecting each transmitting end of the antenna, transmitting rf signals and supplying power.

In this embodiment, an antenna circuit is provided on the PCB circuit board 8, and the antenna circuit includes: an active antenna interface 1, an antenna state detection port 2 and a vehicle-mounted GPS interface 3. A capacitor C3 and a ferrite magnetic bead 1 are connected in series between the active antenna interface 1 and the vehicle-mounted GPS interface 3, the active antenna interface 1 is connected with one end of a transient diode, and the other end of the transient diode is grounded;

an inductor L2 and a resistor R2 are connected in series between the active antenna interface 1 and the vehicle-mounted GPS interface 3, the vehicle-mounted GPS interface 3 is connected with one end of the resistor R3, the other end of the resistor R3 is grounded and connected with one end of a capacitor C5, and the resistor R3 and the capacitor C5 are connected in parallel with the resistor R2.

The other end of the capacitor C5 is connected with an OUT end of the power management chip U1, a capacitor C4 is connected in series between a VIN end and a VSS end of the power management chip U1, the VIN end of the power management chip U1 is connected with one end of the ferrite bead 3, the other end of the ferrite bead 3 is connected with a VDD+5V end, and the VSS end of the power management chip U1 is grounded; the active antenna interface 1 is respectively connected with a capacitor C1 and a capacitor C2, and the capacitor C1 and the capacitor C2 are grounded.

When the device is used, the satellite in space broadcasts its own position coordinates outwards at all times, under the condition of normal use of the device, the battery provides energy for each control system of the main board, the antenna converts the received positioning signals into electric signals and transmits the electric signals to the positioning module at the radio frequency end, the module determines the time difference between the positioning device and the satellite through communication with the satellite, the flight time of electromagnetic waves in space is calculated through the time difference, and the specific distance is calculated according to the transmission speed and the transmission time of the electromagnetic waves. Because the position of each satellite is fixed, three satellites determine the user coordinates, and the fourth satellite checks errors to realize positioning.

The antenna transmitting and receiving is composed of a nickel plated steel sheet 3, a ceramic body 2 and a PCB circuit board 8, two ends of the conductor, which are close to each other, are respectively connected with a feeder line, the changing current on the antenna can generate radiation fields with different frequency bands, and the radiation fields can also influence the current distribution on the antenna. When used as a transmitting antenna, the electrical signal is fed into the conductor from the center of the antenna; when used as a receiving antenna, the antenna center acquires a received signal from a conductor. An antenna is a device that converts a guided wave on a transmission line into electromagnetic waves propagating in free space, the latter being transformed inversely, the guided wave being an electromagnetic wave in which all or a substantial part of the electromagnetic energy is confined within a limited cross-section and transmitted in a defined direction.

The signal detection results are shown in fig. 3-4, two single antennas are combined into one antenna, the assembly precision of the product structure is optimized, the product structure can pass through a vibration durability test and an IPX7 waterproof test, the radio frequency performance is excellent, the average efficiency is greater than 50%, the average gain is greater than 3dBi, and the absolute value of the return loss Log of the LTE full frequency band is greater than 7dBi. The GPS can realize high-precision positioning and can realize positioning with maximum error of not more than 5 meters.

The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims

1. The utility model provides a on-vehicle 4G, GPS two unification antennas, includes plastics epitheca (1), ceramic body (2) and nickel plating steel sheet (3) welding are in the front of PCB circuit board (8), its characterized in that: the back welding of PCB circuit board (8) has shield cover (9) and radio frequency line (4), pressfitting installs radio frequency connector one (6) and radio frequency connector two (7) on radio frequency line (4), buckle installs on radio frequency line (4) carries out spacing line knot (5) to radio frequency connector one (6) and radio frequency connector two (7).

2. The vehicle-mounted 4-G, GPS two-in-one antenna as claimed in claim 1, wherein: foam (10) for supporting the first radio frequency connector (6) and the second radio frequency connector (7) is adhered to the side wall of the shielding cover (9).

3. The vehicle-mounted 4-G, GPS two-in-one antenna as claimed in claim 1, wherein: the plastic upper shell (1) is welded with the plastic lower shell (12), and a magnet (11) is buckled on the side wall of one side of the plastic lower shell (12).

4. A vehicle-mounted 4-G, GPS two-in-one antenna according to claim 3, wherein: a back adhesive layer (13) is stuck on the side wall of one side of the plastic lower shell (12) far away from the plastic upper shell (1).

5. The vehicle-mounted 4-G, GPS two-in-one antenna as claimed in claim 1, wherein: the radio frequency wire (4) is an LMR-100 wire, one end of the radio frequency wire (4) is in telecommunication connection with the PCB (8), and the other end of the radio frequency wire is in telecommunication connection with the first radio frequency connector (6) or the second radio frequency connector (7).

6. The vehicle-mounted 4-G, GPS two-in-one antenna as claimed in claim 1, wherein: an antenna circuit is arranged on the PCB (8), and the antenna circuit comprises: an active antenna interface 1, an antenna state detection port 2 and a vehicle-mounted GPS interface 3.

7. The vehicle-mounted 4-G, GPS two-in-one antenna as claimed in claim 6, wherein: a capacitor C3 and a ferrite magnetic bead 1 are connected in series between the active antenna interface 1 and the vehicle-mounted GPS interface 3, the active antenna interface 1 is connected with one end of a transient diode, and the other end of the transient diode is grounded;

8. The vehicle-mounted 4-G, GPS two-in-one antenna of claim 7, wherein: the other end of the capacitor C5 is connected with the OUT end of the power management chip U1, a capacitor C4 is connected in series between the VIN end and the VSS end of the power management chip U1, the VIN end of the power management chip U1 is connected with one end of the ferrite bead 3, the other end of the ferrite bead 3 is connected with the VDD+5V end, and the VSS end of the power management chip U1 is grounded.

9. The vehicle-mounted 4-G, GPS two-in-one antenna of claim 8, wherein: the active antenna interface 1 is respectively connected with a capacitor C1 and a capacitor C2, and the capacitor C1 and the capacitor C2 are grounded.