GNSS antenna

Abstract

The utility model discloses a GNSS (Global Navigation Satellite System) antenna, which comprises an amplifying circuit board, a GNSS positioning antenna oscillator and a Beidou left-handed transmitting antenna oscillator, wherein the GNSS positioning antenna oscillator and the Beidou left-handed transmitting antenna oscillator are arranged on the amplifying circuit board; a metal plate shell is arranged above the two antenna oscillators, and a gap is formed in the metal plate shell; signals of the two antenna oscillators are amplified and then transmitted to a terminal device through a coaxial cable. The structure of the antenna overturns the composition structure of a traditional GNSS antenna, as shown in the figure 1, a metal plate is used as a main component of the antenna, the antenna can be conformal by using a roof and can also be installed below the roof metal plate, the structure of two bent oscillators and a metal plate slit is adopted, the antenna can support L1 / B1 / G1 / 1616 MHz multiple frequency point work, and high gain and wide bandwidth are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of GNSS antennas, and particularly relates to a GNSS antenna applied with a metal shell. Background Art

[0002] With the completion of the networking of the Beidou satellite system, the domestic application of Beidou satellite positioning is becoming more and more extensive, and the usage scenarios are also becoming more and more complex, and more problems need to be solved and broken through.

[0003] In some special application scenarios, traditional GNSS positioning antennas cannot meet the usage requirements, and the specific structure is as Figure 1 shown. For example, when traditional GNSS positioning antennas are used in engineering equipment in harsh environments such as large engineering vehicles and military vehicles, the antennas must be installed in an environment without metal shielding. Most of them need to install the GNSS antenna at an exposed position such as the roof of the vehicle, because traditional GNSS antennas are all plastic shells, and the antennas may be damaged by stones when the engineering vehicle is operating. This causes the positioning function to be lost, affecting the operation efficiency or causing potential safety hazards when leaving the electronic fence.

[0004] If the GNSS antenna is protected with a metal cover, the GNSS antenna will not be able to search for satellite signals and will also not be able to work.

[0005] Placing the GNSS antenna inside the carriage, firstly, the signal is blocked by the roof of the vehicle, resulting in fewer satellite searches and inaccurate positioning. Secondly, the electromagnetic environment inside the vehicle is complex and the interference is relatively serious, and the quality of satellite searches will be severely degraded, and in severe cases, there will be no positioning. Summary of the Invention

[0006] The technical problem to be solved by the utility model is: to provide a GNSS antenna, which solves the problem of inaccurate positioning caused by the complex electromagnetic environment in which the existing GNSS antenna is located.

[0007] The utility model adopts the following technical solutions to solve the above technical problems:

[0008] A GNSS antenna includes an amplifier circuit board, a GNSS positioning antenna oscillator and a Beidou left-handed transmitting antenna oscillator arranged on the amplifier circuit board; a metal plate shell is arranged above the two antenna oscillators, and a gap is opened on the metal plate shell; the signals of the two antenna oscillators are amplified and then transmitted to the terminal device through a coaxial cable.

[0009] Both of the two antenna oscillators are bent oscillators, and the inner angles of the bent parts of the two bent oscillators are arranged opposite to each other.

[0010] The gap on the metal plate shell is arranged perpendicular to the diagonal line of the inner angles of the two bent parts.

[0011] The two bent arrays and the gap generate two resonant frequencies respectively, realizing the functions of right-handed antenna and left-handed antenna.

[0012] The polarization frequencies of the right-handed antenna include right-handed polarization B1 1561.098 MHz, L1 1575.42 MHz, and G1 1602 MHz; the polarization frequency of the left-handed antenna is left-handed polarization 1616 MHz.

[0013] The GNSS antenna gain reaches up to 6.3dBi.

[0014] The distance between the two antenna elements and the metal plate housing determines the antenna output impedance and bandwidth.

[0015] The amplifier circuit board is a PCBA amplifier circuit board.

[0016] The metal shell is a structure provided by the antenna itself or a peripheral metal plate structure of the installation environment.

[0017] It also includes a shielding cover arranged below the amplifying circuit board, and the connecting end of the coaxial cable and the amplifying circuit board is placed in the shielding cover.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. This structure overturns the composition structure of traditional GNSS antennas and uses metal plates as the main components of the antenna. It can be conformally installed on the roof or installed under the metal plate on the roof. It adopts a structure of two bent arrays plus a metal plate with a gap, which can support L1 / B1 / G1 / 1616MHz multiple frequency points.

[0020] 2. High gain and wide bandwidth are achieved. Since the area of ​​the metal plate can be increased, the GNSS antenna gain can be increased to 6.3dBi. The maximum gain of traditional ceramic antennas is only 5dBi.

[0021] 3. It has achieved the same shape as the vehicle body, super-ground profile, and invisible installation. The metal shell is sturdy and durable and can be used in harsh environments and military scenarios.

[0022] 4. The antenna performance has been improved and the material cost has been reduced; cost reduction and efficiency improvement have been achieved in a real sense.

[0023] 5. This design also adds a left-handed 1616MHz transmitting antenna, which can support the transmission of pulse signals to Beidou satellites for emergency and rescue, and has certain military value; it can be transplanted to combat vehicles, tanks, individual combat systems, and military helmets to improve the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of a traditional GNSS antenna.

[0025] Figure 2 This is a schematic diagram of the antenna structure of the present utility model.

[0026] Figure 3 This is a top view of the bent dipole and metal plate of the antenna of the present utility model.

[0027] Figure 4 This is a schematic diagram of the S11 parameter of the antenna of the present utility model.

[0028] Figure 5 This is the gain waveform diagram of the 1582 MHz right-handed circularly polarized antenna of the antenna of the present utility model.

[0029] Figure 6 This is the gain waveform diagram of the 1616 MHz left-handed circularly polarized antenna of the antenna of the present utility model

[0030] Among them, the identifications in the figure are: 1 - plastic housing; 2 - ceramic dielectric antenna; 3 - PCBA amplifier circuit board; 4 - shielding cover; 5 - plastic bottom case; 6 - coaxial cable; 7 - metal plate housing; 8 - slot on the metal plate; 9 - GNSS positioning antenna dipole; 10 - Beidou left-handed transmitting antenna dipole. Specific embodiments

[0031] In order to enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments.

[0032] Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.

[0033] A GNSS antenna includes an amplifier circuit board, a GNSS positioning antenna dipole and a Beidou left-handed transmitting antenna dipole arranged on the amplifier circuit board; a metal plate housing is arranged above the two antenna dipoles, and a slot is opened on the metal plate housing; the signals of the two antenna dipoles are amplified and then transmitted to the terminal device through a coaxial cable.

[0034] Specific embodiments are as Figures 2 to 6 shown

[0035] A GNSS antenna includes an amplifier circuit board, a GNSS positioning antenna dipole 9 and a Beidou left-handed transmitting antenna dipole 10 arranged on the amplifier circuit board; a metal plate housing 7 is arranged above the two antenna dipoles, and a slot 8 is opened on the metal plate housing; the signals of the two antenna dipoles are amplified and then transmitted to the terminal device through a coaxial cable 6.

[0036] The GNSS positioning antenna oscillator 9 and the Beidou left-handed transmitting antenna oscillator 10 are both bent oscillators, and the inner angles of the bent parts of the two bent oscillators are arranged opposite to each other.

[0037] The slot 8 on the metal plate housing is arranged perpendicular to the diagonal line of the inner angles of the two bent parts.

[0038] The two bent oscillators and the slot respectively generate two resonant frequencies to realize the functions of a right-handed antenna and a left-handed antenna.

[0039] The polarization frequencies of the right-handed antenna include right-handed polarization B1 1561.098 MHz, L1 1575.42 MHz, and G1 1602 MHz; the polarization frequency of the left-handed antenna is left-handed polarization 1616 MHz.

[0040] The GNSS antenna gain can reach up to 6.3 dBi.

[0041] The distance between the two antenna oscillators and the metal plate housing determines the antenna output impedance and bandwidth.

[0042] The amplifier circuit board is the PCBA amplifier circuit board 3.

[0043] The metal housing is the self-owned structure of the antenna or the peripheral metal plate structure of the installation environment.

[0044] It also includes a shielding cover 4 arranged under the amplifier circuit board, and the connection end of the coaxial cable to the amplifier circuit board is placed inside the shielding cover.

[0045] The specific working and design principles of this antenna are as follows:

[0046] The core technologies of this design are the bent oscillator 9, the bent oscillator 10, and the metal plate 7. The diagonal line of the inner angles of the bent oscillator 9 and the bent oscillator 10 is perpendicular to the slot 8 of the metal plate. At this time, two frequency points of right-handed polarization and left-handed polarization can be generated. The width and length of the slot 8 can achieve the coverage of four frequency points of L1 / B1 / G1 and 1616 MHz. The distance between the bent oscillator 9, the bent oscillator 10, and the metal plate 7 determines the antenna output impedance and bandwidth. Since the area of the metal plate can be increased, the GNSS antenna gain can be increased to 6.3 dBi, while the maximum gain of the traditional ceramic antenna is only 5 dBi.

[0047] The metal plate 7 can be the self-owned structure of this design or the metal structure part of the vehicle body. Just make holes at the appropriate positions on its surface. The metal plate 7 is also the key to this design, which can realize the metalization of the top housing, resist impact and adapt to harsh environments. It can also realize the conformal and hidden installation with the vehicle body.

[0048] The right-handed polarization and right-handed polarization frequency generated by the bent oscillator 9, the bent oscillator 10, the metal plate 7 and the gap 8 are connected to the PCBA through the bent oscillator 9 and the bent oscillator 10. The bent oscillator 9 conducts the received GNSS satellite signal to the PCBA amplification circuit, and the PCBA transmits the rescue pulse signal to the satellite or the ground station through the oscillator 10. The GNSS signal is transmitted to the terminal device through the coaxial cable 6 after being amplified and filtered.

[0049] Applying this antenna has the following advantages and benefits:

[0050] A metal plate is used as the top shell. Two resonant frequencies are generated simultaneously through the metal plate gap and the two antenna oscillators, respectively supporting the right-handed antenna for positioning L1 / B1 / G1 and the left-handed antenna at the 1616 MHz frequency point for transmitting signals to the satellite. The resonant frequency generated by the oscillator and the metal gap is amplified by the PCBA and transmitted to the terminal device through the coaxial cable. The shielding cover plays a role in shielding interference signals.

[0051] The metal plate shell is made of metal, which can improve the seismic resistance, be firm and durable. The metal roof of the vehicle can also be used to replace this metal plate, or the heat dissipation gap of the metal device can be used to replace the metal gap, which can achieve conformal with the vehicle body and hidden installation, playing a role in protecting the antenna.

[0052] The core components of the antenna are two bent oscillators, which can simultaneously achieve two polarization frequencies of left-handed and right-handed under a metal plate. In addition, the cost is lower than that of traditional ceramic antennas, and the upper shell of the antenna can be conformal with the vehicle body, which can save the cost of shell mold opening. Therefore, the product cost is greatly saved.

[0053] Antenna coverage frequency band: right-handed polarization B1 1561.098 MHz, L1 1575.42 MHz, G1 1602 MHz

[0054] Left-handed polarization 1616 MHz

[0055] It should be noted that the terms "including" and "having" in the description, claims and above-mentioned drawings of this application, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0056] In this application, the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0057] Moreover, in addition to being used to represent orientation or positional relationships, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0058] What this application aims to protect is the antenna device and its circuit connection relationship. Needless to say, the content protected by this application does not involve improvements to software and methods.

[0059] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A GNSS antenna, characterized in that: It includes an amplifying circuit board, a GNSS positioning antenna vibrator and a Beidou left-handed transmitting antenna vibrator arranged on the amplifying circuit board; A metal plate shell is arranged above the two antenna elements, and a gap is provided on the metal plate shell; the signals of the two antenna elements are amplified and then transmitted to the terminal device through the coaxial cable.

2. The GNSS antenna according to claim 1, characterized in that: Both antenna elements are bent arrays, and the inner angles of the bent parts of the two bent arrays are arranged opposite to each other.

3. The GNSS antenna according to claim 2, characterized in that: The slits on the metal plate shell are arranged perpendicular to the diagonal lines of the inner angles of the two bending parts.

4. The GNSS antenna according to claim 3, characterized in that: The two bent arrays and the gap generate two resonant frequencies respectively, realizing the functions of right-handed antenna and left-handed antenna.

5. The GNSS antenna according to claim 4, characterized in that: The polarization frequencies of the right-handed antenna include right-handed polarization B1 1561.098 MHz, L1 1575.42 MHz, and G1 1602 MHz; the polarization frequency of the left-handed antenna is left-handed polarization 1616 MHz.

6. The GNSS antenna according to claim 1, characterized in that: The GNSS antenna gain reaches up to 6.3dBi.

7. The GNSS antenna according to claim 1, characterized in that: The distance between the two antenna elements and the metal plate housing determines the antenna output impedance and bandwidth.

8. The GNSS antenna according to claim 1, characterized in that: The amplifier circuit board is a PCBA amplifier circuit board.

9. The GNSS antenna according to claim 1, characterized in that: The metal plate shell is a structure provided by the antenna itself or a peripheral metal plate structure of the installation environment.

10. The GNSS antenna according to any one of claims 1 to 9, characterized in that: It also includes a shielding cover arranged below the amplifying circuit board, and the connecting end of the coaxial cable and the amplifying circuit board is placed in the shielding cover.

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