A high-precision four-feed laminated vehicle-mounted external ceramic active antenna

Abstract

The invention discloses a high-precision four-feed laminated vehicle-mounted external ceramic active antenna, comprising a PCB board, a first ceramic sheet, a second ceramic sheet, a coaxial line, a FAKRA connector and a terminal system, wherein the first ceramic sheet is mounted on the upper surface of the PCB board, the second ceramic sheet is mounted on the upper surface of the first ceramic sheet, the first ceramic sheet and the second ceramic sheet are both square, the area of ​​the second ceramic sheet is smaller than that of the first ceramic sheet, the coaxial line is connected to the PCB board, one end of the coaxial line away from the PCB board is connected to the FAKRA connector, and the FAKRA connector is electrically connected to the terminal system. The above technical solution adopts a dual-frequency four-feed satellite navigation positioning antenna with good accuracy and sensitivity, and is widely used in high-precision fields.

Description

Technical Field

[0001] The invention relates to the technical field of active antennas, and in particular to a high-precision four-feed laminated vehicle-mounted external ceramic active antenna. Background Art

[0002] Wireless communication equipment needs to be equipped with an antenna system for sending and receiving wireless signals. Existing GPS ceramic active antennas usually include two parts: a passive ceramic antenna and a low-noise amplifier. The passive ceramic antenna receives satellite signals, and the low-noise amplifier amplifies the signal to compensate for the attenuation of the signal during transmission and improve the signal-to-noise ratio. The active ceramic antenna consists of two parts: a receiving antenna and a preamplifier. The function of the GPS receiving antenna is to convert the electromagnetic wave energy of the radio signal from the satellite into an electric current that can be absorbed and applied by the receiver electronic devices. Existing built-in GPS antennas are mostly circularly polarized, with a signal strength of about 166-DBM, which is relatively weak. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a high-precision four-feed laminated vehicle-mounted external ceramic active antenna, which adopts a dual-frequency four-feed satellite navigation positioning antenna with relatively good accuracy and sensitivity and is widely used in high-precision fields.

[0004] A high-precision four-feed laminated vehicle-mounted external ceramic active antenna in the present invention includes a PCB board, a first ceramic sheet, a second ceramic sheet, a coaxial line, a FAKRA connector and a terminal system, wherein the first ceramic sheet is mounted on the upper surface of the PCB board, the second ceramic sheet is mounted on the upper surface of the first ceramic sheet, the first ceramic sheet and the second ceramic sheet are both square, the area of ​​the second ceramic sheet is smaller than that of the first ceramic sheet, the coaxial line is connected to the PCB board, one end of the coaxial line away from the PCB board is connected to the FAKRA connector, and the FAKRA connector is electrically connected to the terminal system.

[0005] In the above solution, a first feeding point and a second feeding point are provided on the first ceramic sheet, and the first ceramic sheet sends a signal to the terminal system through the first feeding point and the second feeding point.

[0006] In the above solution, a third feeding point and a fourth feeding point are provided on the second ceramic sheet, and the second ceramic sheet sends a signal to the terminal system through the third feeding point and the fourth feeding point.

[0007] In the above solution, the first feeding point, the second feeding point, the third feeding point and the fourth feeding point are all provided with feeding needles, and the feeding needles are connected to the terminal device through radio frequency signals.

[0008] In the above solution, a shielding cover is provided on the lower surface of the PCB board.

[0009] In the above solution, a covering film is provided on the upper surface of the second ceramic sheet.

[0010] The advantages and beneficial effects of the present invention are as follows: the present invention provides a high-precision four-feed laminated vehicle-mounted external ceramic active antenna, which uses a four-feed point dual-frequency satellite navigation positioning antenna with relatively good accuracy and sensitivity and is widely used in high-precision fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 for Figure 1 Bottom view of .

[0014] Figure 3 for Figure 1 Left view of .

[0015] In the figure: 1, PCB board 2, first ceramic sheet 3, second ceramic sheet 4, coaxial line

[0016] 5. FAKRA connector 6. Shielding cover 7. Covering film DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0018] like Figure 1-Figure 3 As shown, the present invention is a high-precision four-feed laminated vehicle-mounted external ceramic active antenna, including a PCB board 1, a first ceramic sheet 2, a second ceramic sheet 3, a coaxial line 4, a FAKRA connector 5 and a terminal system, the first ceramic sheet 2 is mounted on the upper surface of the PCB board 1, the second ceramic sheet 3 is mounted on the upper surface of the first ceramic sheet 2, the first ceramic sheet 2 and the second ceramic sheet 3 are both square, the area of ​​the second ceramic sheet 3 is smaller than the first ceramic sheet 2, the coaxial line 4 is connected to the PCB board 1, the end of the coaxial line 4 away from the PCB board 1 is connected to the FAKRA connector 5, and the FAKRA connector 5 is electrically connected to the terminal system.

[0019] Among them, the coaxial line 4 is used to connect the PCB board 1 and the FAKRA connector 5; the FAKRA connector 5 is used to connect to the terminal system and transmit the antenna radio frequency signal to the terminal system; the PCB board 1 is used to transmit the antenna radio frequency signal to the terminal system.

[0020] Furthermore, a first feeding point and a second feeding point are provided on the first ceramic sheet 2, and the first ceramic sheet 2 sends signals to the terminal system through the first feeding point and the second feeding point; a third feeding point and a fourth feeding point are provided on the second ceramic sheet 3, and the second ceramic sheet 3 sends signals to the terminal system through the third feeding point and the fourth feeding point.

[0021] Feed needles are provided on the first feed point, the second feed point, the third feed point and the fourth feed point, and the feed needles are connected to the terminal device through radio frequency signals; the feed needles are used to collect the resonance signals of the feed points and send them to the terminal system.

[0022] Specifically, a shielding cover 6 is provided on the lower surface of the PCB board 1 .

[0023] A cover film 7 is provided on the upper surface of the second ceramic sheet 3 to affect the resonance frequency of the antenna.

[0024] Advantages of the present invention:

[0025] 1. When installing, you only need to point the ceramic surface towards the sky to get a good effect. If conditions permit, you can place the ceramic antenna in the open air to reduce the impact of signal obstruction.

[0026] 2. It has the characteristics of small size, low power consumption, good out-of-band suppression, etc. It is suitable for vehicle navigation, ship navigation, high-speed rail navigation and positioning equipment;

[0027] 3. The four-feed point dual-frequency antenna has good accuracy and sensitivity, and can be widely used in high-precision fields.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision four-feed laminated vehicle-mounted external ceramic active antenna, characterized in that: It includes a PCB board, a first ceramic sheet, a second ceramic sheet, a coaxial line, a FAKRA connector and a terminal system, the first ceramic sheet is installed on the upper surface of the PCB board, the second ceramic sheet is installed on the upper surface of the first ceramic sheet, the first ceramic sheet and the second ceramic sheet are both square, the area of ​​the second ceramic sheet is smaller than the first ceramic sheet, the coaxial line is connected to the PCB board, the end of the coaxial line away from the PCB board is connected to the FAKRA connector, the FAKRA connector is electrically connected to the terminal system, the first ceramic sheet is provided with a first feed point and a second feed point, the first ceramic sheet sends a signal to the terminal system through the first feed point and the second feed point, the second ceramic sheet is provided with a third feed point and a fourth feed point, the second ceramic sheet sends a signal to the terminal system through the third feed point and the fourth feed point, the first feed point, the second feed point, the third feed point and the fourth feed point are all provided with feed needles, and the feed needles are connected to the terminal equipment through radio frequency signals.

2. The high-precision four-feed laminated vehicle-mounted external ceramic active antenna according to claim 1 is characterized in that: A shielding cover is arranged on the lower surface of the PCB board.

3. The high-precision four-feed laminated vehicle-mounted external ceramic active antenna according to claim 1 is characterized in that: A cover film is provided on the upper surface of the second ceramic sheet.

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